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Tropical Depression Thirteen Forecast Advisory Number 3

2020-08-20 16:50:11| National Hurricane Center (Atlantic)

Issued at 1500 UTC THU AUG 20 2020 000 WTNT23 KNHC 201450 TCMAT3 TROPICAL DEPRESSION THIRTEEN FORECAST/ADVISORY NUMBER 3 NWS NATIONAL HURRICANE CENTER MIAMI FL AL132020 1500 UTC THU AUG 20 2020 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... NONE SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A TROPICAL STORM WATCH IS IN EFFECT FOR... * SABA AND ST. EUSTATIUS * ST. MAARTEN * ANTIGUA...BARBUDA...ST. KITTS...NEVIS...AND ANGUILLA A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA...GENERALLY WITHIN 48 HOURS. INTERESTS ELSEWHERE IN THE NORTHERN LEEWARD ISLANDS...THE VIRGIN ISLANDS...AND PUERTO RICO SHOULD MONITOR THE PROGRESS OF THIS SYSTEM...AS ADDITIONAL TROPICAL STORM WATCHES OR WARNINGS WILL BE REQUIRED FOR PORTIONS OF THOSE AREAS LATER TODAY. TROPICAL DEPRESSION CENTER LOCATED NEAR 16.0N 52.0W AT 20/1500Z POSITION ACCURATE WITHIN 30 NM PRESENT MOVEMENT TOWARD THE WEST-NORTHWEST OR 290 DEGREES AT 18 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1008 MB MAX SUSTAINED WINDS 30 KT WITH GUSTS TO 40 KT. 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 16.0N 52.0W AT 20/1500Z AT 20/1200Z CENTER WAS LOCATED NEAR 15.7N 50.9W FORECAST VALID 21/0000Z 17.0N 54.7W MAX WIND 35 KT...GUSTS 45 KT. 34 KT... 30NE 30SE 0SW 30NW. FORECAST VALID 21/1200Z 18.0N 58.3W MAX WIND 40 KT...GUSTS 50 KT. 34 KT... 40NE 40SE 0SW 30NW. FORECAST VALID 22/0000Z 18.9N 61.6W MAX WIND 45 KT...GUSTS 55 KT. 34 KT... 70NE 60SE 0SW 50NW. FORECAST VALID 22/1200Z 19.6N 64.7W MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 30NE 0SE 0SW 0NW. 34 KT... 90NE 80SE 20SW 70NW. FORECAST VALID 23/0000Z 20.4N 68.1W MAX WIND 55 KT...GUSTS 65 KT. 50 KT... 40NE 0SE 0SW 30NW. 34 KT...110NE 90SE 30SW 90NW. FORECAST VALID 23/1200Z 21.5N 71.8W MAX WIND 60 KT...GUSTS 75 KT. 50 KT... 50NE 30SE 0SW 30NW. 34 KT...110NE 90SE 40SW 90NW. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 24/1200Z 24.0N 78.6W MAX WIND 65 KT...GUSTS 80 KT. OUTLOOK VALID 25/1200Z 27.0N 83.4W MAX WIND 65 KT...GUSTS 80 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 16.0N 52.0W INTERMEDIATE PUBLIC ADVISORY...WTNT33 KNHC/MIATCPAT3...AT 20/1800Z NEXT ADVISORY AT 20/2100Z $$ FORECASTER BROWN

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Tropical Depression Thirteen Graphics

2020-08-20 13:50:44| National Hurricane Center (Atlantic)

5-Day Uncertainty Track last updated Thu, 20 Aug 2020 11:50:44 GMT Wind Speed Probabilities last updated Thu, 20 Aug 2020 10:24:18 GMT

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Summary for Tropical Depression Thirteen (AT3/AL132020)

2020-08-20 13:50:40| National Hurricane Center (Atlantic)

...NEW TROPICAL STORM WATCHES ISSUED FOR PORTIONS OF THE NORTHERN LEEWARD ISLANDS... As of 8:00 AM AST Thu Aug 20 the center of Thirteen was located near 15.4, -50.9 with movement WNW at 21 mph. The minimum central pressure was 1008 mb with maximum sustained winds of about 35 mph.

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Tropical Depression Thirteen Public Advisory Number 2A

2020-08-20 13:50:40| National Hurricane Center (Atlantic)

Issued at 800 AM AST Thu Aug 20 2020 000 WTNT33 KNHC 201150 TCPAT3 BULLETIN Tropical Depression Thirteen Intermediate Advisory Number 2A NWS National Hurricane Center Miami FL AL132020 800 AM AST Thu Aug 20 2020 ...NEW TROPICAL STORM WATCHES ISSUED FOR PORTIONS OF THE NORTHERN LEEWARD ISLANDS... SUMMARY OF 800 AM AST...1200 UTC...INFORMATION ---------------------------------------------- LOCATION...15.4N 50.9W ABOUT 830 MI...1335 KM ESE OF THE NORTHERN LEEWARD ISLANDS MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H PRESENT MOVEMENT...WNW OR 295 DEGREES AT 21 MPH...33 KM/H MINIMUM CENTRAL PRESSURE...1008 MB...29.77 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The government of St. Maarten as issued a Tropical Storm Watch for St. Maarten. The government of Antigua has issued a Tropical Storm Watch for Antigua, Barbuda, St. Kitts, Nevis, and Anguilla. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Watch is in effect for... * Saba and St. Eustatius * St. Maarten * Antigua, Barbuda, St. Kitts, Nevis, and Anguilla A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, generally within 48 hours. Interests elsewhere in the northern Leeward Islands, the Virgin Islands, and Puerto Rico should monitor the progress of this system, as additional tropical storm watches or warnings will be required for portions of those areas later today. 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 Tropical Depression Thirteen was located near latitude 15.4 North, longitude 50.9 West. The depression is moving toward the west-northwest near 21 mph (33 km/h) and this motion is expected to continue for the next few days. On the forecast track, the depression is expected to move near or north of the northern Leeward Islands by late Friday and near or north of the Virgin Islands and Puerto Rico on Saturday. Maximum sustained winds are near 35 mph (55 km/h) with higher gusts. Gradual strengthening is forecast, and the depression is expected to become a tropical storm later today. The estimated minimum central pressure is 1008 mb (29.77 inches). HAZARDS AFFECTING LAND ---------------------- RAINFALL: The depression is expected to produce 1 to 3 inches of rain with isolated maximum totals of 5 inches through Sunday over the northern Leeward Islands and Puerto Rico. WIND: Tropical storm conditions are possible within the watch area by late Friday. NEXT ADVISORY ------------- Next complete advisory at 1100 AM AST. $$ Forecaster Brown

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