000
ABNT20 KNHC 131725
TWOAT

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
200 PM EDT Tue Aug 13 2024

For the North Atlantic...Caribbean Sea and the Gulf of Mexico:

Active Systems:
The National Hurricane Center is issuing advisories on Tropical
Storm Ernesto, located near the Leeward Islands.

Tropical cyclone formation is not expected during the next 7 days.

$$
Forecaster Brown

5-Day Uncertainty Track last updated Tue, 13 Aug 2024 14:59:43 GMT


Wind Speed Probabilities last updated Tue, 13 Aug 2024 15:23:16 GMT

Issued at 1100 AM AST Tue Aug 13 2024 000 WTNT45 KNHC 131457 TCDAT5 Tropical Storm Ernesto Discussion Number 8 NWS National Hurricane Center Miami FL AL052024 1100 AM AST Tue Aug 13 2024 Ernesto's center passed near or over Guadeloupe and Montserrat this morning and is now located just south of St. Kitts and Nevis. Aircraft data, satellite images, and radar data show that the storm is becoming better organized, and there are some indications that an inner core is developing. Earlier NOAA Hurricane Hunter data supported maximum winds of 40 kt, and given the improved structure since then (and consensus T3.0 Dvorak estimates from TAFB and SAB), the initial intensity is set at 45 kt. Ernesto has turned toward the west-northwest, and now has an initial motion of 290/16 kt. A break in the subtropical ridge over the western Atlantic is expected to cause Ernesto to turn toward the northwest and then north during the next couple of days, with the storm's center passing near or over the Virgin Islands this evening and then moving northeast and north of Puerto Rico overnight and on Wednesday. A northward to north-northeastward motion is forecast after 48 hours as Ernesto interacts with a deep-layer trough off the U.S. East Coast, but this trough ends up bypassing Ernesto, resulting in the storm slowing down a bit when it is in the vicinity of Bermuda. The track guidance has been very consistent, and no changes were required to the official track forecast compared to the previous issuance. Sea surface temperatures near Ernesto in the northeastern Caribbean Sea are very warm--on the order of 29-30 degrees Celsius--and vertical shear in the atmosphere is relatively light. Combined with the thought that Ernesto is developing an inner core, these ingredients favor quick strengthening over the next day or so. SHIPS and the HFIP Corrected Consensus models indicate that Ernesto could be near or at hurricane strength in about 24 hours, and several of the Rapid Intensification (RI) indices are notably high. As a result, the updated NHC intensity forecast is more aggressive than the previous forecast, and brings Ernesto to hurricane strength by 24 hours when the center is north of Puerto Rico. Because there is some risk of the storm becoming a hurricane before that time, a Hurricane Watch has been issued for the Virgin Islands, Culebra, and Vieques. After moving north of Puerto Rico, additional strengthening is likely, and the NHC forecast is near the high end of the guidance. Ernesto is also likely to grow in size while over the western Atlantic, and that is reflected in the official forecast. Key Messages: 1. Tropical storm conditions are expected to continue over portions of the Leeward Islands today and spread westward to the Virgin Islands and Puerto Rico later today and tonight. Hurricane conditions are also possible on the Virgin Islands, Culebra, and Vieques this evening and tonight. 2. Heavy rainfall may result in locally considerable flash flooding and mudslides in areas of the Leeward Islands through today, and over the Virgin Islands into Puerto Rico by later today through Wednesday. 3. Ernesto is likely to bring impacts to Bermuda late this week, and interests there should monitor the progress of this system. FORECAST POSITIONS AND MAX WINDS INIT 13/1500Z 16.9N 62.6W 45 KT 50 MPH 12H 14/0000Z 18.0N 64.6W 55 KT 65 MPH 24H 14/1200Z 19.8N 66.6W 65 KT 75 MPH 36H 15/0000Z 22.0N 68.0W 75 KT 85 MPH 48H 15/1200Z 24.3N 68.5W 85 KT 100 MPH 60H 16/0000Z 26.3N 68.1W 90 KT 105 MPH 72H 16/1200Z 28.2N 67.0W 95 KT 110 MPH 96H 17/1200Z 31.4N 65.2W 95 KT 110 MPH 120H 18/1200Z 34.9N 64.5W 90 KT 105 MPH $$ Forecaster Berg

Issued at 1500 UTC TUE AUG 13 2024 000 FONT15 KNHC 131457 PWSAT5 TROPICAL STORM ERNESTO WIND SPEED PROBABILITIES NUMBER 8 NWS NATIONAL HURRICANE CENTER MIAMI FL AL052024 1500 UTC TUE AUG 13 2024 AT 1500Z THE CENTER OF TROPICAL STORM ERNESTO WAS LOCATED NEAR LATITUDE 16.9 NORTH...LONGITUDE 62.6 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 45 KTS...50 MPH...85 KM/H. Z INDICATES COORDINATED UNIVERSAL TIME (GREENWICH) ATLANTIC STANDARD TIME (AST)...SUBTRACT 4 HOURS FROM Z TIME EASTERN DAYLIGHT TIME (EDT)...SUBTRACT 4 HOURS FROM Z TIME CENTRAL DAYLIGHT TIME (CDT)...SUBTRACT 5 HOURS FROM Z TIME WIND SPEED PROBABILITY TABLE FOR SPECIFIC LOCATIONS CHANCES OF SUSTAINED (1-MINUTE AVERAGE) WIND SPEEDS OF AT LEAST ...34 KT (39 MPH... 63 KM/H)... ...50 KT (58 MPH... 93 KM/H)... ...64 KT (74 MPH...119 KM/H)... FOR LOCATIONS AND TIME PERIODS DURING THE NEXT 5 DAYS PROBABILITIES FOR LOCATIONS ARE GIVEN AS OP(CP) WHERE OP IS THE PROBABILITY OF THE EVENT BEGINNING DURING AN INDIVIDUAL TIME PERIOD (ONSET PROBABILITY) (CP) IS THE PROBABILITY OF THE EVENT OCCURRING BETWEEN 12Z TUE AND THE FORECAST HOUR (CUMULATIVE PROBABILITY) PROBABILITIES ARE GIVEN IN PERCENT X INDICATES PROBABILITIES LESS THAN 1 PERCENT PROBABILITIES FOR 34 KT AND 50 KT ARE SHOWN AT A GIVEN LOCATION WHEN THE 5-DAY CUMULATIVE PROBABILITY IS AT LEAST 3 PERCENT. PROBABILITIES FOR 34...50...64 KT SHOWN WHEN THE 5-DAY 64-KT CUMULATIVE PROBABILITY IS AT LEAST 1 PERCENT. - - - - WIND SPEED PROBABILITIES FOR SELECTED LOCATIONS - - - - FROM FROM FROM FROM FROM FROM FROM TIME 12Z TUE 00Z WED 12Z WED 00Z THU 12Z THU 12Z FRI 12Z SAT PERIODS TO TO TO TO TO TO TO 00Z WED 12Z WED 00Z THU 12Z THU 12Z FRI 12Z SAT 12Z SUN FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT SABLE ISLAND 34 X X( X) X( X) X( X) X( X) X( X) 3( 3) YARMOUTH NS 34 X X( X) X( X) X( X) X( X) X( X) 4( 4) NANTUCKET MA 34 X X( X) X( X) X( X) X( X) X( X) 4( 4) BERMUDA 34 X X( X) X( X) X( X) 9( 9) 46(55) 15(70) BERMUDA 50 X X( X) X( X) X( X) 1( 1) 26(27) 12(39) BERMUDA 64 X X( X) X( X) X( X) X( X) 12(12) 10(22) SAN SALVADOR 34 X X( X) X( X) 2( 2) 1( 3) X( 3) X( 3) MAYAGUANA 34 X X( X) 3( 3) 3( 6) 2( 8) X( 8) X( 8) GRAND TURK 34 X 2( 2) 7( 9) 6(15) 1(16) X(16) 1(17) CAPE BEATA 34 X 1( 1) 1( 2) 1( 3) X( 3) X( 3) X( 3) PUERTO PLATA 34 X 3( 3) 5( 8) 2(10) X(10) X(10) X(10) SANTO DOMINGO 34 X 4( 4) 4( 8) X( 8) 1( 9) X( 9) X( 9) PONCE PR 34 11 32(43) 2(45) 1(46) X(46) X(46) X(46) AGUADILLA PR 34 5 35(40) 4(44) 1(45) X(45) X(45) X(45) AGUADILLA PR 50 X 4( 4) 1( 5) X( 5) X( 5) X( 5) X( 5) SAN JUAN PR 34 12 44(56) 2(58) X(58) X(58) X(58) X(58) SAN JUAN PR 50 X 3( 3) X( 3) X( 3) X( 3) X( 3) X( 3) VIEQUES PR 34 77 16(93) X(93) 1(94) X(94) X(94) X(94) VIEQUES PR 50 5 23(28) X(28) X(28) X(28) X(28) X(28) VIEQUES PR 64 X 3( 3) X( 3) X( 3) X( 3) X( 3) X( 3) SAINT THOMAS 34 93 6(99) X(99) X(99) X(99) X(99) X(99) SAINT THOMAS 50 21 33(54) X(54) X(54) X(54) X(54) X(54) SAINT THOMAS 64 2 3( 5) X( 5) X( 5) X( 5) X( 5) X( 5) SAINT CROIX 34 91 4(95) X(95) X(95) X(95) X(95) X(95) SAINT CROIX 50 13 12(25) X(25) X(25) X(25) X(25) X(25) SAINT CROIX 64 2 X( 2) X( 2) X( 2) X( 2) X( 2) X( 2) SAINT MAARTEN 34 96 X(96) 1(97) X(97) X(97) X(97) X(97) SAINT MAARTEN 50 3 X( 3) X( 3) X( 3) X( 3) X( 3) X( 3) SABA 34 99 X(99) X(99) X(99) X(99) X(99) X(99) SABA 50 13 X(13) X(13) X(13) X(13) X(13) X(13) ST EUSTATIUS 34 99 X(99) X(99) X(99) X(99) X(99) X(99) ST EUSTATIUS 50 6 X( 6) X( 6) X( 6) X( 6) X( 6) X( 6) ST KITTS-NEVIS 34 99 X(99) X(99) X(99) X(99) X(99) X(99) BARBUDA 34 99 X(99) X(99) X(99) X(99) X(99) X(99) ANTIGUA 34 99 X(99) X(99) X(99) X(99) X(99) X(99) GUADELOUPE 34 99 X(99) X(99) X(99) X(99) X(99) X(99) AVES 34 4 3( 7) X( 7) X( 7) X( 7) X( 7) X( 7) $$ FORECASTER BERG

...ERNESTO A LITTLE STRONGER AS IT PASSES JUST SOUTH OF ST. KITTS AND NEVIS... ...HURRICANE WATCH ISSUED FOR THE VIRGIN ISLANDS, VIEQUES, AND CULEBRA... As of 11:00 AM AST Tue Aug 13 the center of Ernesto was located near 16.9, -62.6 with movement WNW at 18 mph. The minimum central pressure was 1003 mb with maximum sustained winds of about 50 mph.

Issued at 1100 AM AST Tue Aug 13 2024 000 WTNT35 KNHC 131456 TCPAT5 BULLETIN Tropical Storm Ernesto Advisory Number 8 NWS National Hurricane Center Miami FL AL052024 1100 AM AST Tue Aug 13 2024 ...ERNESTO A LITTLE STRONGER AS IT PASSES JUST SOUTH OF ST. KITTS AND NEVIS... ...HURRICANE WATCH ISSUED FOR THE VIRGIN ISLANDS, VIEQUES, AND CULEBRA... SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION ----------------------------------------------- LOCATION...16.9N 62.6W ABOUT 155 MI...250 KM ESE OF ST. CROIX ABOUT 250 MI...405 KM ESE OF SAN JUAN PUERTO RICO MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H PRESENT MOVEMENT...WNW OR 290 DEGREES AT 18 MPH...30 KM/H MINIMUM CENTRAL PRESSURE...1003 MB...29.62 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: A Hurricane Watch has been issued for the U.S. Virgin Islands, Culebra, and Vieques. The government of Antigua and Barbuda has issued a Hurricane Watch for the British Virgin Islands. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Watch is in effect for... * U.S. Virgin Islands * British Virgin Islands * Vieques and Culebra A Tropical Storm Warning is in effect for... * St. Kitts, Nevis, Montserrat, Antigua, Barbuda, and Anguilla * Guadeloupe * St. Martin and St. Barthelemy * Sint Maarten * British Virgin Islands * U.S. Virgin Islands * Puerto Rico * Vieques and Culebra A Hurricane Watch means that hurricane conditions are possible within the watch area, in this case within the next 12 hours or so. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area within 36 hours. Interests elsewhere in the northeastern Caribbean should monitor the progress of Ernesto. For storm information specific to your area in the United States, including possible inland watches and warnings, please monitor products issued by your local National Weather Service forecast office. For storm information specific to your area outside of the United States, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 1100 AM AST (1500 UTC), the center of Tropical Storm Ernesto was located near latitude 16.9 North, longitude 62.6 West. Ernesto is moving toward the west-northwest near 18 mph (30 km/h), and this general motion is expected to continue through tonight. A motion toward the northwest and then north at a slower forward speed is expected on Wednesday and Thursday. On the forecast track, the center of Ernesto should pass near or over the Virgin Islands this evening, and then pass just to the northeast and north of Puerto Rico tonight and on Wednesday. Ernesto should then move over the western Atlantic later in the week. Maximum sustained winds have increased to near 50 mph (85 km/h) with higher gusts. Additional strengthening is forecast, and Ernesto is expected to become a hurricane by early Wednesday. Tropical-storm-force winds extend outward up to 105 miles (165 km) from the center. A wind gust to 65 mph (105 km/h) was recently reported on St. Barthelemy. The estimated minimum central pressure is 1003 mb (29.62 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Ernesto can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT5 and WMO header WTNT45 KNHC and on the web at hurricanes.gov/text/MIATCDAT5.shtml. RAINFALL: Tropical Storm Ernesto is expected to produce total rain accumulations of 4 to 6 inches over portions of the Leeward Islands from Guadeloupe to Dominica and across the U.S and British Virgin Islands. Rainfall totals of 6 to 8 inches, with maximum amounts of 10 inches, are expected across southeastern Puerto Rico, with totals of 2 to 4 inches across northwestern Puerto Rico. For a complete depiction of forecast rainfall associated with Tropical Storm Ernesto, please see the National Weather Service Storm Total Rainfall Graphic, available at hurricanes.gov/graphics_at5.shtml?rainqpf WIND: Tropical storm conditions are occurring over portions of the warning area in the Leeward Islands. Tropical storm conditions are expected to begin spreading over the Virgin Islands and Puerto Rico later today and tonight. Hurricane conditions are also possible over the Virgin Islands, Vieques, and Culebra this evening into tonight. STORM SURGE: A storm surge will raise water levels by as much as 1 to 3 feet above ground level for the eastern coast of Puerto Rico from San Juan to Guayama, including the islands of Culebra and Vieques and in the U.S. Virgin Islands, including St. Thomas, St. John, and St. Croix. A storm surge will raise water levels by as much as 1 to 3 feet above normal tide levels in the British Virgin Islands. Near the coast, the surge will be accompanied by large and destructive waves. SURF: Swells generated by Ernesto are affecting portions of the Leeward Islands and Virgin Islands and will spread westward to Puerto Rico later today. These swells will then reach the Dominican Republic tonight, the Turks and Caicos Islands and southeastern Bahamas on Wednesday, and Bermuda on Thursday. NEXT ADVISORY ------------- Next intermediate advisory at 200 PM AST. Next complete advisory at 500 PM AST. $$ Forecaster Berg

Issued at 1500 UTC TUE AUG 13 2024 000 WTNT25 KNHC 131456 TCMAT5 TROPICAL STORM ERNESTO FORECAST/ADVISORY NUMBER 8 NWS NATIONAL HURRICANE CENTER MIAMI FL AL052024 1500 UTC TUE AUG 13 2024 TROPICAL STORM CENTER LOCATED NEAR 16.9N 62.6W AT 13/1500Z POSITION ACCURATE WITHIN 30 NM PRESENT MOVEMENT TOWARD THE WEST-NORTHWEST OR 290 DEGREES AT 16 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1003 MB MAX SUSTAINED WINDS 45 KT WITH GUSTS TO 55 KT. 34 KT....... 90NE 60SE 0SW 60NW. 12 FT SEAS..210NE 60SE 0SW 150NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 16.9N 62.6W AT 13/1500Z AT 13/1200Z CENTER WAS LOCATED NEAR 16.6N 62.0W FORECAST VALID 14/0000Z 18.0N 64.6W MAX WIND 55 KT...GUSTS 65 KT. 50 KT... 40NE 30SE 0SW 30NW. 34 KT...130NE 100SE 30SW 80NW. FORECAST VALID 14/1200Z 19.8N 66.6W MAX WIND 65 KT...GUSTS 80 KT. 64 KT... 20NE 0SE 0SW 0NW. 50 KT... 40NE 30SE 0SW 20NW. 34 KT...150NE 140SE 50SW 120NW. FORECAST VALID 15/0000Z 22.0N 68.0W MAX WIND 75 KT...GUSTS 90 KT. 64 KT... 25NE 25SE 0SW 0NW. 50 KT... 50NE 50SE 30SW 30NW. 34 KT...160NE 160SE 80SW 110NW. FORECAST VALID 15/1200Z 24.3N 68.5W MAX WIND 85 KT...GUSTS 105 KT. 64 KT... 30NE 25SE 15SW 20NW. 50 KT... 80NE 80SE 30SW 40NW. 34 KT...160NE 160SE 110SW 100NW. FORECAST VALID 16/0000Z 26.3N 68.1W MAX WIND 90 KT...GUSTS 110 KT. 50 KT... 80NE 90SE 50SW 50NW. 34 KT...160NE 160SE 130SW 100NW. FORECAST VALID 16/1200Z 28.2N 67.0W MAX WIND 95 KT...GUSTS 115 KT. 50 KT... 80NE 100SE 60SW 50NW. 34 KT...170NE 170SE 140SW 120NW. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 125 NM ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 17/1200Z 31.4N 65.2W MAX WIND 95 KT...GUSTS 115 KT. 50 KT... 90NE 90SE 60SW 70NW. 34 KT...170NE 180SE 120SW 140NW. OUTLOOK VALID 18/1200Z 34.9N 64.5W MAX WIND 90 KT...GUSTS 110 KT. 50 KT... 90NE 90SE 60SW 70NW. 34 KT...170NE 170SE 120SW 120NW. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 16.9N 62.6W INTERMEDIATE PUBLIC ADVISORY...WTNT35 KNHC/MIATCPAT5...AT 13/1800Z NEXT ADVISORY AT 13/2100Z $$ FORECASTER BERG

5-Day Uncertainty Track last updated Tue, 13 Aug 2024 11:56:49 GMT


Wind Speed Probabilities last updated Tue, 13 Aug 2024 09:23:07 GMT

...ERNESTO STRENGTHENS A LITTLE WHILE PASSING ACROSS THE LESSER ANTILLES... As of 8:00 AM AST Tue Aug 13 the center of Ernesto was located near 16.6, -61.9 with movement W at 18 mph. The minimum central pressure was 1005 mb with maximum sustained winds of about 45 mph.

Issued at 800 AM AST Tue Aug 13 2024 000 WTNT35 KNHC 131154 TCPAT5 BULLETIN Tropical Storm Ernesto Intermediate Advisory Number 7A NWS National Hurricane Center Miami FL AL052024 800 AM AST Tue Aug 13 2024 ...ERNESTO STRENGTHENS A LITTLE WHILE PASSING ACROSS THE LESSER ANTILLES... SUMMARY OF 800 AM AST...1200 UTC...INFORMATION ---------------------------------------------- LOCATION...16.6N 61.9W ABOUT 35 MI...55 KM NW OF GUADELOUPE ABOUT 300 MI...480 KM ESE OF SAN JUAN PUERTO RICO MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H PRESENT MOVEMENT...W OR 280 DEGREES AT 18 MPH...30 KM/H MINIMUM CENTRAL PRESSURE...1005 MB...29.68 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * St. Kitts, Nevis, Montserrat, Antigua, Barbuda, and Anguilla * Guadeloupe * St. Martin and St. Barthelemy * Sint Maarten * British Virgin Islands * U.S. Virgin Islands * Puerto Rico * Vieques * Culebra A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area within 36 hours. Interests elsewhere in the northeastern Caribbean should monitor the progress of Ernesto. For storm information specific to your area in the United States, including possible inland watches and warnings, please monitor products issued by your local National Weather Service forecast office. For storm information specific to your area outside of the United States, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 800 AM AST (1200 UTC), the center of Tropical Storm Ernesto was located near latitude 16.6 North, longitude 61.9 West. Ernesto is moving toward the west near 18 mph (30 km/h). A west-northwestward motion with some decrease in forward speed is expected during the next day or so. On the forecast track, Ernesto is expected to move across portions of the Leeward Islands this morning and near or over the U.S. and British Virgin Islands and Puerto Rico by this evening. After passing Puerto Rico and the Virgin Islands, Ernesto is forecast to turn northward over the western Atlantic. Data from a NOAA Hurricane Hunter aircraft indicate that maximum sustained winds have increased to near 45 mph (75 km/h) with higher gusts. Additional strengthening is expected during the next few days, and Ernesto could reach hurricane strength by Thursday over the waters north of the Greater Antilles. Tropical-storm-force winds extend outward up to 70 miles (110 km) from the center. St. Barthelemy reported a wind gust of 56 mph (90 km/h), and St. Martin reported a gust of 50 mph (80 km/h) during the past few hours. The estimated minimum central pressure based on dropsonde observations is 1005 mb (29.68 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Ernesto can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT5 and WMO header WTNT45 KNHC and on the web at hurricanes.gov/text/MIATCDAT5.shtml. RAINFALL: Tropical Storm Ernesto is expected to produce total rain accumulations of 4 to 6 inches over portions of the Leeward and Virgin Islands. For Puerto Rico, 3 to 6 inches of rainfall, with maximum amounts of 10 inches, are expected. For a complete depiction of forecast rainfall associated with Tropical Storm Ernesto, please see the National Weather Service Storm Total Rainfall Graphic, available at hurricanes.gov/graphics_at5.shtml?rainqpf Elsewhere in the Caribbean, Tropical Storm Ernesto is expected to produce the following rain accumulations through Friday morning: Windward Islands...1 to 4 inches Eastern Hispaniola...2 to 4 inches WIND: Tropical storm conditions are occurring over portions of the warning area for the Leeward Islands. Tropical storm conditions are expected to begin spreading over the Virgin Islands and Puerto Rico by this evening. STORM SURGE: A storm surge will raise water levels by as much as 1 to 3 feet above ground level for the eastern coast of Puerto Rico from San Juan to Guayama, including the islands of Culebra and Vieques and in the U.S. Virgin Islands, including St. Thomas, St. John, and St. Croix. A storm surge will raise water levels by as much as 1 to 3 feet above normal tide levels in the British Virgin Islands. Near the coast, the surge will be accompanied by large and destructive waves. SURF: Swells generated by Ernesto are affecting portions of the Leeward Islands and Virgin Islands and will spread westward to Puerto Rico later today. These swells will then reach the Dominican Republic tonight, the Turks and Caicos Islands and southeastern Bahamas on Wednesday, and Bermuda on Thursday. NEXT ADVISORY ------------- Next complete advisory at 1100 AM AST. $$ Forecaster Berg

000
ABNT20 KNHC 131142
TWOAT

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
800 AM EDT Tue Aug 13 2024

For the North Atlantic...Caribbean Sea and the Gulf of Mexico:

Active Systems:
The National Hurricane Center is issuing advisories on Tropical
Storm Ernesto, located near the Leeward Islands.

Tropical cyclone formation is not expected during the next 7 days.

$$
Forecaster Hagen/Berg

5-Day Uncertainty Track last updated Tue, 13 Aug 2024 08:34:44 GMT


Wind Speed Probabilities last updated Tue, 13 Aug 2024 09:23:07 GMT

Issued at 500 AM AST Tue Aug 13 2024 000 WTNT45 KNHC 130832 TCDAT5 Tropical Storm Ernesto Discussion Number 7 NWS National Hurricane Center Miami FL AL052024 500 AM AST Tue Aug 13 2024 Satellite imagery and French radar data from Guadeloupe indicate that convection has become more concentrated near the center of Ernesto during the past several hours, and there is increased evidence of cyclonic rotation in the radar imagery. However, this has not yet resulted in significant intensification, with surface obs from the Leeward Islands showing a large area of pressures near 1007-1009 mb and no evidence of any tight wind center. Based on this and the latest satellite intensity estimates, the initial intensity is held at 35 kt. The initial motion is a somewhat uncertain 280/17, a little slower than before. Ernesto should turn west-northwestward with an additional decrease in forward speed during the next 12 h or so as it approaches a developing break in the subtropical ridge. This motion should bring the center near or over the Leeward Islands today and near or over the Virgin Islands and Puerto Rico tonight and early Wednesday. After that, the flow between the subtropical ridge and a mid-latitude trough moving eastward from the United States should cause the cyclone to turn northward and northeastward. By the end of the forecast period, this trough is expected to move eastward away from Ernesto, with a mid-latitude shortwave ridge passing north of the storm. This development should cause another decrease in forward speed during the 96-120 h period. The new forecast track is close to the various consensus models, and it is also similar to the previous forecast track. Ernesto is forecast to be in an environment of light to moderate shear and over warm sea surface temperatures through the forecast period, and this combination should allow it to strengthen. Intensification is likely to be slow during the first 12-24 h primarily due to the current lack of organization. After that, a faster rate of strengthening is expected, with Ernesto forecast to reach hurricane strength in 36-48 h. The intensity forecast follows the overall trend of the intensity guidance, and it lies between the intensity consensus and the upper edge of the guidance. Key Messages: 1. Ernesto is expected to bring tropical storm conditions to portions of the Leeward Islands today and to the Virgin Islands and Puerto Rico by late today or tonight. Tropical Storm Warnings are in effect for this entire area. 2. Heavy rainfall may result in locally considerable flash flooding and mudslides in areas of the Leeward Islands through today, and over the Virgin Islands into Puerto Rico by later today through Wednesday. 3. It is too soon to know what impacts Ernesto could bring to Bermuda late this week, and interests there should monitor the progress of this system. FORECAST POSITIONS AND MAX WINDS INIT 13/0900Z 16.2N 61.3W 35 KT 40 MPH 12H 13/1800Z 17.1N 63.4W 40 KT 45 MPH 24H 14/0600Z 18.7N 65.7W 50 KT 60 MPH 36H 14/1800Z 20.7N 67.3W 60 KT 70 MPH 48H 15/0600Z 23.0N 68.3W 70 KT 80 MPH 60H 15/1800Z 25.1N 68.3W 80 KT 90 MPH 72H 16/0600Z 27.2N 67.3W 90 KT 105 MPH 96H 17/0600Z 30.5N 65.0W 95 KT 110 MPH 120H 18/0600Z 33.5N 64.5W 95 KT 110 MPH $$ Forecaster Beven

...CENTER OF ERNESTO NEAR GUADELOUPE IN THE LEEWARD ISLANDS... As of 5:00 AM AST Tue Aug 13 the center of Ernesto was located near 16.2, -61.3 with movement W at 20 mph. The minimum central pressure was 1007 mb with maximum sustained winds of about 40 mph.

Issued at 500 AM AST Tue Aug 13 2024 000 WTNT35 KNHC 130831 TCPAT5 BULLETIN Tropical Storm Ernesto Advisory Number 7 NWS National Hurricane Center Miami FL AL052024 500 AM AST Tue Aug 13 2024 ...CENTER OF ERNESTO NEAR GUADELOUPE IN THE LEEWARD ISLANDS... SUMMARY OF 500 AM AST...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...16.2N 61.3W ABOUT 10 MI...15 KM SE OF GUADELOUPE ABOUT 350 MI...565 KM ESE OF SAN JUAN PUERTO RICO MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H PRESENT MOVEMENT...W OR 280 DEGREES AT 20 MPH...31 KM/H MINIMUM CENTRAL PRESSURE...1007 MB...29.74 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * St. Kitts, Nevis, Montserrat, Antigua, Barbuda, and Anguilla * Guadeloupe * St. Martin and St. Barthelemy * Sint Maarten * British Virgin Islands * U.S. Virgin Islands * Puerto Rico * Vieques * Culebra A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area within 36 hours. Interests elsewhere in the northeastern Caribbean should monitor the progress of Ernesto. For storm information specific to your area in the United States, including possible inland watches and warnings, please monitor products issued by your local National Weather Service forecast office. For storm information specific to your area outside of the United States, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 500 AM AST (0900 UTC), the center of Tropical Storm Ernesto was located near latitude 16.2 North, longitude 61.3 West. Ernesto is moving toward the west near 20 mph (31 km/h). A west-northwestward motion with some decrease in forward speed is expected during the next day or so. On the forecast track, Ernesto is expected to move across portions of the Leeward Islands this morning and near or over the U.S. and British Virgin Islands and Puerto Rico by this evening. After passing Puerto Rico and the Virgin Islands, Ernesto is forecast to turn northward over the western Atlantic. Maximum sustained winds are near 40 mph (65 km/h) with higher gusts. Gradual strengthening is expected during the next few days, and Ernesto could reach hurricane strength by Thursday over the waters north of the Greater Antilles. Tropical-storm-force winds extend outward up to 70 miles (110 km) from the center. St. Barthelemy recently reported a wind gust of 53 mph (85 km/h). The estimated minimum central pressure based on surface observations in the Leeward Islands is 1007 mb (29.74 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Ernesto can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT5 and WMO header WTNT45 KNHC and on the web at hurricanes.gov/text/MIATCDAT5.shtml. RAINFALL: Tropical Storm Ernesto is expected to produce total rain accumulations of 4 to 6 inches over portions of the Leeward and Virgin Islands. For Puerto Rico, 3 to 6 inches of rainfall, with maximum amounts of 10 inches, is expected. For a complete depiction of forecast rainfall associated with Tropical Storm Ernesto, please see the National Weather Service Storm Total Rainfall Graphic, available at hurricanes.gov/graphics_at5.shtml?rainqpf Elsewhere in the Caribbean, Tropical Storm Ernesto is expected to produce the following rain accumulations through Friday morning: Windward Islands… 1 to 4 inches Eastern Hispaniola… 2 to 4 inches WIND: Tropical storm conditions are expected in the warning area for the Leeward Islands beginning during the next few hours. Tropical storm conditions are expected to begin spreading over the Virgin Islands and Puerto Rico by this evening. STORM SURGE: A storm surge will raise water levels by as much as 1 to 3 feet above ground level for the eastern coast of Puerto Rico from San Juan to Guayama, including the islands of Culebra and Vieques and in the U.S. Virgin Islands, including St. Thomas, St. John, and St. Croix. A storm surge will raise water levels by as much as 1 to 3 feet above normal tide levels in the British Virgin Islands. Near the coast, the surge will be accompanied by large and destructive waves. SURF: Swells generated by Ernesto will likely begin to affect portions of the Leeward Islands beginning in the next several hours. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next intermediate advisory at 800 AM AST. Next complete advisory at 1100 AM AST. $$ Forecaster Beven

Issued at 0900 UTC TUE AUG 13 2024 000 FONT15 KNHC 130831 PWSAT5 TROPICAL STORM ERNESTO WIND SPEED PROBABILITIES NUMBER 7 NWS NATIONAL HURRICANE CENTER MIAMI FL AL052024 0900 UTC TUE AUG 13 2024 AT 0900Z THE CENTER OF TROPICAL STORM ERNESTO WAS LOCATED NEAR LATITUDE 16.2 NORTH...LONGITUDE 61.3 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 35 KTS...40 MPH...65 KM/H. Z INDICATES COORDINATED UNIVERSAL TIME (GREENWICH) ATLANTIC STANDARD TIME (AST)...SUBTRACT 4 HOURS FROM Z TIME EASTERN DAYLIGHT TIME (EDT)...SUBTRACT 4 HOURS FROM Z TIME CENTRAL DAYLIGHT TIME (CDT)...SUBTRACT 5 HOURS FROM Z TIME WIND SPEED PROBABILITY TABLE FOR SPECIFIC LOCATIONS CHANCES OF SUSTAINED (1-MINUTE AVERAGE) WIND SPEEDS OF AT LEAST ...34 KT (39 MPH... 63 KM/H)... ...50 KT (58 MPH... 93 KM/H)... ...64 KT (74 MPH...119 KM/H)... FOR LOCATIONS AND TIME PERIODS DURING THE NEXT 5 DAYS PROBABILITIES FOR LOCATIONS ARE GIVEN AS OP(CP) WHERE OP IS THE PROBABILITY OF THE EVENT BEGINNING DURING AN INDIVIDUAL TIME PERIOD (ONSET PROBABILITY) (CP) IS THE PROBABILITY OF THE EVENT OCCURRING BETWEEN 06Z TUE AND THE FORECAST HOUR (CUMULATIVE PROBABILITY) PROBABILITIES ARE GIVEN IN PERCENT X INDICATES PROBABILITIES LESS THAN 1 PERCENT PROBABILITIES FOR 34 KT AND 50 KT ARE SHOWN AT A GIVEN LOCATION WHEN THE 5-DAY CUMULATIVE PROBABILITY IS AT LEAST 3 PERCENT. PROBABILITIES FOR 34...50...64 KT SHOWN WHEN THE 5-DAY 64-KT CUMULATIVE PROBABILITY IS AT LEAST 1 PERCENT. - - - - WIND SPEED PROBABILITIES FOR SELECTED LOCATIONS - - - - FROM FROM FROM FROM FROM FROM FROM TIME 06Z TUE 18Z TUE 06Z WED 18Z WED 06Z THU 06Z FRI 06Z SAT PERIODS TO TO TO TO TO TO TO 18Z TUE 06Z WED 18Z WED 06Z THU 06Z FRI 06Z SAT 06Z SUN FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT BERMUDA 34 X X( X) X( X) X( X) 3( 3) 40(43) 18(61) BERMUDA 50 X X( X) X( X) X( X) 1( 1) 17(18) 17(35) BERMUDA 64 X X( X) X( X) X( X) X( X) 9( 9) 11(20) MAYAGUANA 34 X X( X) X( X) 3( 3) 3( 6) X( 6) X( 6) GRAND TURK 34 X X( X) 3( 3) 6( 9) 4(13) X(13) X(13) PUERTO PLATA 34 X X( X) 3( 3) 3( 6) 2( 8) X( 8) X( 8) SANTO DOMINGO 34 X 1( 1) 2( 3) 2( 5) X( 5) 1( 6) X( 6) PONCE PR 34 X 13(13) 8(21) 2(23) X(23) X(23) X(23) AGUADILLA PR 34 X 11(11) 13(24) 2(26) X(26) X(26) 1(27) SAN JUAN PR 34 X 17(17) 8(25) 1(26) X(26) X(26) X(26) VIEQUES PR 34 1 54(55) 3(58) 1(59) X(59) X(59) X(59) VIEQUES PR 50 X 6( 6) 1( 7) X( 7) X( 7) X( 7) X( 7) SAINT THOMAS 34 2 72(74) 1(75) 1(76) X(76) X(76) X(76) SAINT THOMAS 50 X 12(12) 1(13) X(13) X(13) X(13) X(13) SAINT THOMAS 64 X 1( 1) X( 1) X( 1) X( 1) X( 1) X( 1) SAINT CROIX 34 4 49(53) 1(54) X(54) X(54) X(54) X(54) SAINT CROIX 50 X 5( 5) X( 5) X( 5) X( 5) X( 5) X( 5) SAINT MAARTEN 34 31 19(50) 1(51) X(51) X(51) X(51) X(51) SABA 34 56 18(74) X(74) X(74) X(74) X(74) 1(75) SABA 50 2 1( 3) X( 3) X( 3) X( 3) X( 3) X( 3) ST EUSTATIUS 34 66 8(74) X(74) X(74) X(74) X(74) X(74) ST EUSTATIUS 50 2 1( 3) X( 3) X( 3) X( 3) X( 3) X( 3) ST KITTS-NEVIS 34 70 2(72) X(72) X(72) X(72) X(72) X(72) BARBUDA 34 30 X(30) 1(31) X(31) X(31) X(31) X(31) ANTIGUA 34 54 X(54) X(54) X(54) X(54) X(54) X(54) GUADELOUPE 34 10 1(11) X(11) X(11) X(11) X(11) X(11) AVES 34 1 1( 2) 1( 3) X( 3) X( 3) X( 3) X( 3) $$ FORECASTER BEVEN

Issued at 0900 UTC TUE AUG 13 2024 000 WTNT25 KNHC 130831 TCMAT5 TROPICAL STORM ERNESTO FORECAST/ADVISORY NUMBER 7 NWS NATIONAL HURRICANE CENTER MIAMI FL AL052024 0900 UTC TUE AUG 13 2024 TROPICAL STORM CENTER LOCATED NEAR 16.2N 61.3W AT 13/0900Z POSITION ACCURATE WITHIN 30 NM PRESENT MOVEMENT TOWARD THE WEST OR 280 DEGREES AT 17 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1007 MB MAX SUSTAINED WINDS 35 KT WITH GUSTS TO 45 KT. 34 KT....... 60NE 0SE 0SW 0NW. 12 FT SEAS..210NE 0SE 0SW 150NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 16.2N 61.3W AT 13/0900Z AT 13/0600Z CENTER WAS LOCATED NEAR 16.1N 60.5W FORECAST VALID 13/1800Z 17.1N 63.4W MAX WIND 40 KT...GUSTS 50 KT. 34 KT...100NE 60SE 0SW 40NW. FORECAST VALID 14/0600Z 18.7N 65.7W MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 30NE 20SE 0SW 0NW. 34 KT...140NE 100SE 30SW 70NW. FORECAST VALID 14/1800Z 20.7N 67.3W MAX WIND 60 KT...GUSTS 75 KT. 50 KT... 40NE 30SE 0SW 0NW. 34 KT...150NE 120SE 40SW 80NW. FORECAST VALID 15/0600Z 23.0N 68.3W MAX WIND 70 KT...GUSTS 85 KT. 64 KT... 20NE 15SE 0SW 0NW. 50 KT... 50NE 30SE 0SW 0NW. 34 KT...160NE 150SE 80SW 100NW. FORECAST VALID 15/1800Z 25.1N 68.3W MAX WIND 80 KT...GUSTS 100 KT. 50 KT... 60NE 60SE 30SW 30NW. 34 KT...170NE 170SE 100SW 100NW. FORECAST VALID 16/0600Z 27.2N 67.3W MAX WIND 90 KT...GUSTS 110 KT. 50 KT... 70NE 70SE 40SW 40NW. 34 KT...170NE 170SE 120SW 110NW. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 125 NM ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 17/0600Z 30.5N 65.0W MAX WIND 95 KT...GUSTS 115 KT. 50 KT... 70NE 90SE 50SW 50NW. 34 KT...170NE 170SE 120SW 120NW. OUTLOOK VALID 18/0600Z 33.5N 64.5W MAX WIND 95 KT...GUSTS 115 KT. 50 KT... 90NE 90SE 60SW 60NW. 34 KT...170NE 170SE 120SW 120NW. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 16.2N 61.3W INTERMEDIATE PUBLIC ADVISORY...WTNT35 KNHC/MIATCPAT5...AT 13/1200Z NEXT ADVISORY AT 13/1500Z $$ FORECASTER BEVEN

5-Day Uncertainty Track last updated Tue, 13 Aug 2024 05:33:06 GMT


Wind Speed Probabilities last updated Tue, 13 Aug 2024 03:22:58 GMT

...ERNESTO TO MOVE THROUGH THE LEEWARD ISLANDS DURING THE NEXT SEVERAL HOURS... As of 2:00 AM AST Tue Aug 13 the center of Ernesto was located near 16.2, -60.6 with movement W at 24 mph. The minimum central pressure was 1009 mb with maximum sustained winds of about 40 mph.

Issued at 200 AM AST Tue Aug 13 2024 000 WTNT35 KNHC 130530 TCPAT5 BULLETIN Tropical Storm Ernesto Intermediate Advisory Number 6A NWS National Hurricane Center Miami FL AL052024 200 AM AST Tue Aug 13 2024 ...ERNESTO TO MOVE THROUGH THE LEEWARD ISLANDS DURING THE NEXT SEVERAL HOURS... SUMMARY OF 200 AM AST...0600 UTC...INFORMATION ---------------------------------------------- LOCATION...16.2N 60.6W ABOUT 100 MI...160 KM SE OF ANTIGUA ABOUT 385 MI...620 KM ESE OF SAN JUAN PUERTO RICO MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H PRESENT MOVEMENT...W OR 275 DEGREES AT 24 MPH...39 KM/H MINIMUM CENTRAL PRESSURE...1009 MB...29.80 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * St. Kitts, Nevis, Montserrat, Antigua, Barbuda, and Anguilla * Guadeloupe * St. Martin and St. Barthelemy * Sint Maarten * British Virgin Islands * U.S. Virgin Islands * Puerto Rico * Vieques * Culebra A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area within 36 hours. Interests elsewhere in the northeastern Caribbean should monitor the progress of Ernesto. For storm information specific to your area in the United States, including possible inland watches and warnings, please monitor products issued by your local National Weather Service forecast office. For storm information specific to your area outside of the United States, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 200 AM AST (0600 UTC), the center of Tropical Storm Ernesto was located near latitude 16.2 North, longitude 60.6 West. Ernesto is moving toward the west near 24 mph (39 km/h). A westward to west-northwestward motion with some decrease in forward speed is expected during the next day or so. On the forecast track, Ernesto is expected to move across portions of the Leeward Islands this morning and near or over the U.S. and British Virgin Islands and Puerto Rico by this evening. Ernesto is then forecast to turn northward over the western Atlantic. Maximum sustained winds are near 40 mph (65 km/h) with higher gusts. Gradual strengthening is expected during the next few days. Tropical-storm-force winds extend outward up to 80 miles (130 km) from the center. The estimated minimum central pressure based on Air Force Reserve Hurricane Hunter aircraft data and surface observations is 1009 mb (29.80 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Ernesto can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT5 and WMO header WTNT45 KNHC and on the web at hurricanes.gov/text/MIATCDAT5.shtml. RAINFALL: Tropical Storm Ernesto is expected to produce total rain accumulations of 4 to 6 inches over portions of the Leeward and Virgin Islands. For Puerto Rico, 3 to 6 inches of rainfall, with maximum amounts of 10 inches, is expected. For a complete depiction of forecast rainfall associated with Tropical Storm Ernesto, please see the National Weather Service Storm Total Rainfall Graphic, available at hurricanes.gov/graphics_at5.shtml?rainqpf Elsewhere in the Caribbean, Tropical Storm Ernesto is expected to produce the following rain accumulations through Friday morning: Windward Islands... 1 to 4 inches Eastern Hispaniola... 2 to 4 inches WIND: Tropical storm conditions are expected in the warning area for the Leeward Islands beginning during the next several hours. Tropical storm conditions are expected to begin spreading over the Virgin Islands and Puerto Rico by this evening. STORM SURGE: A storm surge will raise water levels by as much as 1 to 3 feet above ground level for the eastern coast of Puerto Rico from San Juan to Guayama, including the islands of Culebra and Vieques and in the U.S. Virgin Islands, including St. Thomas, St. John, and St. Croix. A storm surge will raise water levels by as much as 1 to 3 feet above normal tide levels in the British Virgin Islands. Near the coast, the surge will be accompanied by large and destructive waves. SURF: Swells generated by Ernesto will likely begin to affect portions of the Leeward Islands beginning in the next several hours. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 500 AM AST. $$ Forecaster Beven