...ERNESTO STRENGTHENING AS IT APPROACHES BERMUDA... ...HIGH RISK OF DANGEROUS RIP CURRENTS ALONG U.S. EAST COAST BEACHES FRIDAY AND OVER THE WEEKEND... As of 8:00 PM AST Thu Aug 15 the center of Ernesto was located near 26.6, -68.4 with movement N at 13 mph. The minimum central pressure was 970 mb with maximum sustained winds of about 90 mph.

Issued at 800 PM AST Thu Aug 15 2024 000 WTNT35 KNHC 152330 TCPAT5 BULLETIN Hurricane Ernesto Intermediate Advisory Number 17A NWS National Hurricane Center Miami FL AL052024 800 PM AST Thu Aug 15 2024 ...ERNESTO STRENGTHENING AS IT APPROACHES BERMUDA... ...HIGH RISK OF DANGEROUS RIP CURRENTS ALONG U.S. EAST COAST BEACHES FRIDAY AND OVER THE WEEKEND... SUMMARY OF 800 PM AST...0000 UTC...INFORMATION ---------------------------------------------- LOCATION...26.6N 68.4W ABOUT 450 MI...730 KM SSW OF BERMUDA MAXIMUM SUSTAINED WINDS...90 MPH...150 KM/H PRESENT MOVEMENT...N OR 010 DEGREES AT 13 MPH...20 KM/H MINIMUM CENTRAL PRESSURE...970 MB...28.64 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Warning is in effect for... * Bermuda A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. A warning is typically issued 36 hours before the anticipated first occurrence of tropical-storm-force winds, conditions that make outside preparations difficult or dangerous. Preparations to protect life and property should be rushed to completion. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 800 PM AST (0000 UTC), the center of Hurricane Ernesto was located near latitude 26.6 North, longitude 68.4 West. Ernesto is moving toward the north near 13 mph (20 km/h). This general motion is expected to continue through early Friday, followed by a slower northeastward or north-northeastward motion late Friday and Saturday. A faster northeastward motion is expected later in the weekend. On the forecast track, the center of Ernesto is expected to pass near or over Bermuda on Saturday. Maximum sustained winds have increased to near 90 mph (150 km/h) with higher gusts. Additional strengthening is forecast during the next day or so, and Ernesto could be near major hurricane strength on Friday. Ernesto is forecast to be a large hurricane near Bermuda on Saturday. Hurricane-force winds extend outward up to 60 miles (95 km) from the center and tropical-storm-force winds extend outward up to 265 miles (425 km). The estimated minimum central pressure based on data from the Air Force Hurricane Hunters is 970 mb (28.64 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. WIND: Hurricane conditions are expected on Bermuda Saturday, with tropical storm conditions likely beginning Friday afternoon. STORM SURGE: A dangerous storm surge is expected to produce significant coastal flooding on Bermuda in areas of onshore winds. Near the coast, the surge will be accompanied by large and destructive waves. RAINFALL: Ernesto is expected to produce total rain accumulations of 6 to 12 inches on Bermuda with isolated maximum amounts up to 15 inches. This rainfall may result in considerable life-threatening flash flooding. SURF: Swells generated by Ernesto are affecting portions of the Turks and Caicos Islands, the Bahamas, and are beginning to reach Bermuda. Swells are expected to reach the east coast of the United States overnight and continue into the weekend. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office, and stay out of the water if advised by lifeguards. NEXT ADVISORY ------------- Next complete advisory at 1100 PM AST. $$ Forecaster Cangialosi

000
ABNT20 KNHC 152326
TWOAT

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
800 PM EDT Thu Aug 15 2024

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

Active Systems:
The National Hurricane Center is issuing advisories on Hurricane
Ernesto, located several hundred miles south-southwest of Bermuda.

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

$$
Forecaster Reinhart

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5-Day Uncertainty Track last updated Thu, 15 Aug 2024 20:54:07 GMT


Wind Speed Probabilities last updated Thu, 15 Aug 2024 21:23:08 GMT

Issued at 500 PM AST Thu Aug 15 2024 274 WTNT45 KNHC 152047 TCDAT5 Hurricane Ernesto Discussion Number 17 NWS National Hurricane Center Miami FL AL052024 500 PM AST Thu Aug 15 2024 The inner core of Ernesto continues to be plagued by dry air intrusion. A NOAA Hurricane Hunter aircraft reported that Ernesto has yet to close off an eyewall. While the minimum central sea level pressure has fallen to an estimated 972 mb based on dropsonde data, the maximum flight-level winds are still at 86 kt, similar to the earlier mission. Therefore, the initial intensity is held at 75 kt for this advisory cycle. Ernesto has turned northward, with an estimated motion of 360/11 kt. The storm is currently being steered by the flow between the subtropical ridge centered over the north Atlantic Ocean and a mid-latitude trough just off the eastern seaboard of North America. This hurricane is expected to gradually turn more northeastward and slow down over the next day or so as the trough lifts out to the northeast. A subsequent trough is forecast to approach the New England coast on Sunday and accelerate Ernesto off to the northeast. The official track forecast is virtually unchanged from the previous prediction and lies between the various consensus aids. Based on the forecast, Ernesto is expected to pass near or over Bermuda on Saturday and near or east of Atlantic Canada on Monday. Warm waters and relatively low vertical wind shear should allow Ernesto to gradually intensify over the next 12 hours or so. Still, the mid-level atmospheric moisture is expected to be marginal and the system could continue to experience dry air intrusions. Global models suggest that while the vertical wind shear could begin to increase within a day, Ernesto may be positioned in a region relative to the departing trough where it could capitalize on enhanced outflow and continue to strength. By the weekend, atmospheric conditions should become less favorable and gradually weaken the hurricane. Still, Ernesto is expected to remain a powerful hurricane as it moves north of Bermuda. Little changes have been made to the latest NHC intensity forecast, which lies near the top of the model guidance envelope. Key Messages: 1. Ernesto is expected to approach Bermuda late Friday and be near the island Saturday and Saturday night. A prolonged period of strong winds and storm surge is expected on Bermuda beginning late Friday, and a hurricane warning is in effect for the island. Preparations to protect life and property should be rushed to completion. 2. Rainfall associated with Ernesto is expected to begin to affect Bermuda this evening and may result in flash flooding Friday through this weekend. 3. Even though Ernesto is forecast to remain well offshore the U.S. East Coast, swells generated by the storm are expected to reach the area during the next few days, including over the weekend. Beach goers should be aware of a significant risk of life-threatening surf and rip currents, and stay out of the water if advised by lifeguards. Surf and rip currents are also possible on the Dominican Republic, the Turks and Caicos, the Bahamas, and Bermuda during the next few days. FORECAST POSITIONS AND MAX WINDS INIT 15/2100Z 26.1N 68.9W 75 KT 85 MPH 12H 16/0600Z 27.6N 68.1W 85 KT 100 MPH 24H 16/1800Z 29.5N 66.9W 95 KT 110 MPH 36H 17/0600Z 31.3N 65.8W 90 KT 105 MPH 48H 17/1800Z 32.9N 65.2W 80 KT 90 MPH 60H 18/0600Z 34.5N 64.9W 80 KT 90 MPH 72H 18/1800Z 36.9N 63.7W 80 KT 90 MPH 96H 19/1800Z 43.5N 57.9W 70 KT 80 MPH 120H 20/1800Z 50.1N 43.0W 50 KT 60 MPH...POST-TROP/EXTRATROP $$ Forecaster Bucci/Onderlinde

Issued at 2100 UTC THU AUG 15 2024 911 FONT15 KNHC 152047 PWSAT5 HURRICANE ERNESTO WIND SPEED PROBABILITIES NUMBER 17 NWS NATIONAL HURRICANE CENTER MIAMI FL AL052024 2100 UTC THU AUG 15 2024 AT 2100Z THE CENTER OF HURRICANE ERNESTO WAS LOCATED NEAR LATITUDE 26.1 NORTH...LONGITUDE 68.9 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 75 KTS...85 MPH...140 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 18Z THU 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 18Z THU 06Z FRI 18Z FRI 06Z SAT 18Z SAT 18Z SUN 18Z MON PERIODS TO TO TO TO TO TO TO 06Z FRI 18Z FRI 06Z SAT 18Z SAT 18Z SUN 18Z MON 18Z TUE FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT HIBERNIA OILFD 34 X X( X) X( X) X( X) X( X) 1( 1) 36(37) HIBERNIA OILFD 50 X X( X) X( X) X( X) X( X) X( X) 11(11) HIBERNIA OILFD 64 X X( X) X( X) X( X) X( X) X( X) 3( 3) CAPE RACE NFLD 34 X X( X) X( X) X( X) X( X) 10(10) 34(44) CAPE RACE NFLD 50 X X( X) X( X) X( X) X( X) 2( 2) 12(14) CAPE RACE NFLD 64 X X( X) X( X) X( X) X( X) X( X) 5( 5) ILE ST PIERRE 34 X X( X) X( X) X( X) X( X) 15(15) 18(33) ILE ST PIERRE 50 X X( X) X( X) X( X) X( X) 4( 4) 10(14) ILE ST PIERRE 64 X X( X) X( X) X( X) X( X) 1( 1) 3( 4) BURGEO NFLD 34 X X( X) X( X) X( X) X( X) 10(10) 11(21) BURGEO NFLD 50 X X( X) X( X) X( X) X( X) 2( 2) 4( 6) BURGEO NFLD 64 X X( X) X( X) X( X) X( X) X( X) 1( 1) PTX BASQUES 34 X X( X) X( X) X( X) X( X) 10(10) 4(14) PTX BASQUES 50 X X( X) X( X) X( X) X( X) 2( 2) 2( 4) EDDY POINT NS 34 X X( X) X( X) X( X) X( X) 19(19) 3(22) EDDY POINT NS 50 X X( X) X( X) X( X) X( X) 6( 6) 1( 7) EDDY POINT NS 64 X X( X) X( X) X( X) X( X) 1( 1) X( 1) SYDNEY NS 34 X X( X) X( X) X( X) X( X) 17(17) 5(22) SYDNEY NS 50 X X( X) X( X) X( X) X( X) 5( 5) 2( 7) SYDNEY NS 64 X X( X) X( X) X( X) X( X) 1( 1) X( 1) SABLE ISLAND 34 X X( X) X( X) X( X) X( X) 44(44) 4(48) SABLE ISLAND 50 X X( X) X( X) X( X) X( X) 19(19) 3(22) SABLE ISLAND 64 X X( X) X( X) X( X) X( X) 6( 6) 1( 7) HALIFAX NS 34 X X( X) X( X) X( X) X( X) 9( 9) 1(10) YARMOUTH NS 34 X X( X) X( X) X( X) X( X) 10(10) X(10) ST JOHN NB 34 X X( X) X( X) X( X) X( X) 6( 6) X( 6) EASTPORT ME 34 X X( X) X( X) X( X) X( X) 5( 5) X( 5) NANTUCKET MA 34 X X( X) X( X) X( X) 1( 1) 2( 3) X( 3) BERMUDA 34 X 16(16) 61(77) 16(93) 2(95) X(95) X(95) BERMUDA 50 X X( X) 37(37) 31(68) 5(73) X(73) X(73) BERMUDA 64 X X( X) 14(14) 27(41) 4(45) X(45) X(45) $$ FORECASTER BUCCI/ONDERLINDE