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Summary for Hurricane Larry (AT2/AL122021)
2021-09-10 13:47:29| National Hurricane Center (Atlantic)
...LARRY MOVING QUICKLY TOWARD SOUTHEASTERN NEWFOUNDLAND... ...EXPECTED TO BRING HURRICANE-FORCE WINDS, A DANGEROUS STORM SURGE, AND HEAVY RAINFALL TO THAT AREA TONIGHT... As of 8:00 AM AST Fri Sep 10 the center of Larry was located near 39.2, -60.8 with movement NNE at 26 mph. The minimum central pressure was 968 mb with maximum sustained winds of about 85 mph.
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Hurricane Larry Public Advisory Number 39A
2021-09-10 13:47:29| National Hurricane Center (Atlantic)
Issued at 800 AM AST Fri Sep 10 2021 000 WTNT32 KNHC 101147 TCPAT2 BULLETIN Hurricane Larry Intermediate Advisory Number 39A NWS National Hurricane Center Miami FL AL122021 800 AM AST Fri Sep 10 2021 ...LARRY MOVING QUICKLY TOWARD SOUTHEASTERN NEWFOUNDLAND... ...EXPECTED TO BRING HURRICANE-FORCE WINDS, A DANGEROUS STORM SURGE, AND HEAVY RAINFALL TO THAT AREA TONIGHT... SUMMARY OF 800 AM AST...1200 UTC...INFORMATION ---------------------------------------------- LOCATION...39.2N 60.8W ABOUT 650 MI...1045 KM SW OF CAPE RACE NEWFOUNDLAND MAXIMUM SUSTAINED WINDS...85 MPH...140 KM/H PRESENT MOVEMENT...NNE OR 15 DEGREES AT 26 MPH...43 KM/H MINIMUM CENTRAL PRESSURE...968 MB...28.59 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Warning is in effect for... * Southeastern Newfoundland from Arnold's Cove to Jones Harbour A Tropical Storm Warning is in effect for... * Southeastern Newfoundland from Francois to west of Arnold's Cove * Southeastern Newfoundland from north of Jones Harbor to Fogo Island A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area, in this case within the next 24 hours. Preparations to protect life and property should be rushed to completion. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, in this case within the next 12 hours. Interests elsewhere in southeastern Newfoundland should monitor the progress of this system. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 800 AM AST (1200 UTC), the center of Hurricane Larry was located near latitude 39.2 North, longitude 60.8 West. Larry is moving quickly toward the north-northeast near 26 mph (43 km/h). A turn to the northeast with an increase in forward speed is expected later today. On the forecast track, the center of Larry will pass well southeast of Nova Scotia today, and move over southeastern Newfoundland tonight. Maximum sustained winds are near 85 mph (140 km/h) with higher gusts. Gradual weakening is forecast during the next day or so, but Larry is expected to remain a hurricane until it passes Newfoundland. Larry should become an extratropical cyclone on Saturday, and is now forecast to be absorbed by a larger extratropical low near Greenland by the end of the weekend. Larry is a large hurricane. Hurricane-force winds extend outward up to 90 miles (150 km) from the center and tropical-storm- force winds extend outward up to 240 miles (390 km). The estimated minimum central pressure is 968 mb (28.59 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Larry can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT2, WMO header WTNT42 KNHC and on the web at hurricanes.gov/graphics_at2.shtml?key_messages WIND: Hurricane conditions are expected within the hurricane warning area in southeastern Newfoundland tonight, with tropical storm conditions expected to begin this afternoon or evening. Tropical storm conditions are expected to begin in the tropical storm warning area in southeastern Newfoundland later today. STORM SURGE: A dangerous storm surge is expected to produce coastal flooding within the warning areas in southeastern Newfoundland. SURF: Swells generated by Larry will continue to affect the Bahamas today. Significant swells from Larry will continue affecting Bermuda, the east coast of the United States, and Atlantic Canada through Saturday night. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. RAINFALL: Heavy rains from Larry will move quickly across eastern Newfoundland tonight, producing 1 to 2 inches of rain. NEXT ADVISORY ------------- Next complete advisory at 1100 AM AST. $$ Forecaster Cangialosi
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Hurricane Larry Graphics
2021-09-10 10:45:10| National Hurricane Center (Atlantic)
5-Day Uncertainty Track last updated Fri, 10 Sep 2021 08:45:10 GMT Wind Speed Probabilities last updated Fri, 10 Sep 2021 08:45:11 GMT
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Hurricane Larry Forecast Discussion Number 39
2021-09-10 10:44:31| National Hurricane Center (Atlantic)
Issued at 500 AM AST Fri Sep 10 2021 000 WTNT42 KNHC 100844 TCDAT2 Hurricane Larry Discussion Number 39 NWS National Hurricane Center Miami FL AL122021 500 AM AST Fri Sep 10 2021 Larry's satellite presentation has remained largely unchanged overnight. Deep convection continues to persist over and to the northeast of the center, with a larger outer band around the eastern portion of the circulation. Subjective Dvorak intensity estimates from TAFB and SAB have lowered slightly, and the initial intensity has been adjusted downward to 75 kt. This lies between the lower subjective satellite estimates and the higher UW/CIMSS ADT and SATCON values. Larry is forecast to remain over warm waters and in low vertical wind shear conditions this morning, therefore little overall change in intensity is expected in the short term. The hurricane will cross the north wall of the Gulf Stream over much cooler SSTs this afternoon, but the increasingly fast forward speed of the system and baroclinic forcing from a mid-latitude trough approaching from the west is likely to help Larry maintain hurricane strength as is passes over southeastern Newfoundland tonight. Larry is forecast to become extratropical shortly thereafter, and some slight weakening should occur before the post-tropical cyclone is absorbed by a larger extratropical low near southern Greenland in a couple of days. The NHC intensity forecast is similar to the HCCA and IVCN consensus aids and also follows the trends of the latest global model guidance. Larry has turned north-northeastward or 015/23 kt. The track guidance is once again in excellent agreement that Larry should turn northeastward today and continue to accelerate ahead of the aforementioned trough. The center of Larry should pass over southeastern Newfoundland tonight, but users are reminded to not focus on the exact details of the track forecast as strong winds, heavy rainfall, and a dangerous storm surge will extend far from the center of the cyclone. The updated official forecast lies near the center of the track guidance envelope, but is slightly faster than the previous forecast during the first 36 hours. Key Messages: 1. Larry is forecast to move over portions of southeastern Newfoundland tonight as it undergoes transition to a hurricane-force post-tropical cyclone. Hurricane conditions, a dangerous storm surge, and heavy rainfall are expected in portions of southeastern Newfoundland where a Hurricane Warning in effect. 2. Large swells generated by Larry will continue to affect the Bahamas, Bermuda, and the east coast of the United States and Atlantic Canada through Saturday. These swells will cause life-threatening surf and rip current conditions, and beachgoers and other interests along these coasts are urged to follow the guidance of lifeguards and local officials. FORECAST POSITIONS AND MAX WINDS INIT 10/0900Z 37.7N 61.8W 75 KT 85 MPH 12H 10/1800Z 41.9N 59.2W 75 KT 85 MPH 24H 11/0600Z 48.6N 53.0W 70 KT 80 MPH 36H 11/1800Z 55.0N 46.8W 60 KT 70 MPH...POST-TROP/EXTRATROP 48H 12/0600Z 60.0N 42.0W 60 KT 70 MPH...POST-TROP/EXTRATROP 60H 12/1800Z...DISSIPATED $$ Forecaster Brown
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Summary for Hurricane Larry (AT2/AL122021)
2021-09-10 10:43:55| National Hurricane Center (Atlantic)
...LARRY EXPECTED TO BRING HURRICANE-FORCE WINDS, A DANGEROUS STORM SURGE, AND HEAVY RAINFALL TO SOUTHEASTERN NEWFOUNDLAND TONIGHT... As of 5:00 AM AST Fri Sep 10 the center of Larry was located near 37.7, -61.8 with movement NNE at 26 mph. The minimum central pressure was 968 mb with maximum sustained winds of about 85 mph.
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