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Hurricane Maria Public Advisory Number 18

2017-09-20 16:40:24| National Hurricane Center (Atlantic)

Issued at 1100 AM AST Wed Sep 20 2017 000 WTNT35 KNHC 201440 TCPAT5 BULLETIN Hurricane Maria Advisory Number 18 NWS National Hurricane Center Miami FL AL152017 1100 AM AST Wed Sep 20 2017 ...DESTRUCTIVE WINDS AND FLOODING CONTINUE OVER PORTIONS OF PUERTO RICO... ...CENTER OF MARIA APPROACHING THE NORTHERN COAST OF PUERTO RICO... SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION ----------------------------------------------- LOCATION...18.4N 66.5W ABOUT 15 MI...25 KM ESE OF ARECIBO PUERTO RICO ABOUT 25 MI...40 KM W OF SAN JUAN PUERTO RICO MAXIMUM SUSTAINED WINDS...140 MPH...220 KM/H PRESENT MOVEMENT...NW OR 305 DEGREES AT 12 MPH...19 KM/H MINIMUM CENTRAL PRESSURE...930 MB...27.47 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The government of France has discontinued the Tropical Storm Warning for St. Martin and St. Barthelemy. The government of St. Maarten has discontinued the Tropical Storm Warning and Hurricane Watch for St. Maarten. The government of the Netherlands has discontinued the Tropical Storm Warning for Saba. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Warning is in effect for... * U.S. Virgin Islands * British Virgin Islands * Puerto Rico, Culebra, and Vieques * Dominican Republic from Cabo Engano to Puerto Plata * Turks and Caicos Islands and the Southeastern Bahamas A Tropical Storm Warning is in effect for... * Dominican Republic west of Puerto Plata to the northern border of the Dominican Republic and Haiti * Dominican Republic west of Cabo Engano to Punta Palenque A Hurricane Watch is in effect for... * Dominican Republic from Isla Saona to Cabo Engano A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. 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. A Hurricane Watch means that hurricane conditions are possible within the watch area. A watch is typically issued 48 hours before the anticipated first occurrence of tropical-storm-force winds, conditions that make outside preparations difficult or dangerous. Interests elsewhere in Hispaniola and the Bahamas should monitor the progress of Maria. 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 the United States, please monitor products issued by your national meteorological service. DISCUSSION AND 48-HOUR OUTLOOK ------------------------------ At 1100 AM AST (1500 UTC), the center of Hurricane Maria was located inland over Puerto Rico near latitude 18.4 North, longitude 66.5 West. Maria is moving toward the northwest near 12 mph (19 km/h), and this general motion with a gradual decrease in forward speed is expected through early Friday. On the forecast track, the center of Maria will move offshore of the northern coast of Puerto Rico during the next couple of hours. The center will then pass offshore of the northeastern coast of the Dominican Republic tonight and Thursday and then move near the Turks and Caicos Islands and southeastern Bahamas Thursday night and Friday. Maximum sustained winds are near 140 mph (220 km/h) with higher gusts. Maria is a category 4 hurricane on the Saffir-Simpson Hurricane Wind Scale. Little change in strength is forecast during the next 48 hours, and Maria is expected to remain a dangerous major hurricane through Friday. Hurricane-force winds extend outward up to 60 miles (95 km) from the center, and tropical-storm-force winds extend outward up to 150 miles (240 km). The estimated minimum central pressure is 930 mb (27.47 inches). HAZARDS AFFECTING LAND ---------------------- WIND: Hurricane and tropical storm conditions are occurring over Puerto Rico and the Virgin Islands. Tropical storm conditions are expected to begin in the warning areas in the Dominican Republic this afternoon, with hurricane conditions starting in the hurricane warning area tonight. Tropical storm conditions are expected to begin in the Turks and Caicos Islands and the southeastern Bahamas Thursday morning, with hurricane conditions starting Thursday evening. Wind speeds atop and on the windward sides of hills and mountains and on high-rise buildings could be much stronger than the near- surface winds indicated in this advisory. STORM SURGE: The combination of a dangerous storm surge and the tide will cause normally dry areas near the coast to be flooded by rising waters moving inland from the shoreline. The water is expected to reach the following heights above ground if the peak surge occurs at the time of high tide... Puerto Rico...6 to 9 ft The deepest water will occur along the immediate coast near and to the north and east of the landfall location, where the surge will be accompanied by large and destructive waves. Surge-related flooding depends on the relative timing of the surge and the tidal cycle, and can vary greatly over short distances. For information specific to your area, please see products issued by your local National Weather Service forecast office. A dangerous storm surge accompanied by large and destructive waves will raise water levels by as much as 4 to 6 feet above normal tide levels in the hurricane warning area in the Dominican Republic, and 1 to 3 ft elsewhere along the northern coasts of the Dominican Republic and Haiti. A dangerous storm surge accompanied by large and destructive waves will raise water levels by as much as 10 to 15 feet above normal tide levels in the hurricane warning area near and to the north of the center of Maria for both the Southeastern Bahamas and the Turks and Caicos Islands. RAINFALL: Maria is expected to produce the following rainfall totals through Friday: Puerto Rico...12 to 18 inches, isolated 25 inches U.S. and British Virgin Islands...additional 5 to 10 inches, isolated 15 inches Northern and eastern Dominican Republic, Turks and Caicos and southeast Bahamas...8 to 16 inches, isolated 20 inches Northern Haiti...2 to 4 inches Rainfall on these islands will cause life-threatening flash floods and mudslides TORNADOES: Several tornadoes are possible over Puerto Rico and the U.S. Virgin Islands today. THE EYE: Do not venture outside when the calm eye of the hurricane passes over, as dangerous winds will return very quickly when the eye moves away. SURF: Swells generated by Maria are affecting the Leeward Islands, Puerto Rico, and the Virgin Islands. These swells will begin affecting the northern coast of Hispaniola, the Turks and Caicos Islands, and the Southeastern Bahamas during the next day or two. 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 200 PM AST. Next complete advisory at 500 PM AST. $$ Forecaster Berg

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Hurricane Maria Forecast Advisory Number 18

2017-09-20 16:39:58| National Hurricane Center (Atlantic)

Issued at 1500 UTC WED SEP 20 2017 000 WTNT25 KNHC 201439 TCMAT5 HURRICANE MARIA FORECAST/ADVISORY NUMBER 18 NWS NATIONAL HURRICANE CENTER MIAMI FL AL152017 1500 UTC WED SEP 20 2017 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... THE GOVERNMENT OF FRANCE HAS DISCONTINUED THE TROPICAL STORM WARNING FOR ST. MARTIN AND ST. BARTHELEMY. THE GOVERNMENT OF ST. MAARTEN HAS DISCONTINUED THE TROPICAL STORM WARNING AND HURRICANE WATCH FOR ST. MAARTEN. THE GOVERNMENT OF THE NETHERLANDS HAS DISCONTINUED THE TROPICAL STORM WARNING FOR SABA. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A HURRICANE WARNING IS IN EFFECT FOR... * U.S. VIRGIN ISLANDS * BRITISH VIRGIN ISLANDS * PUERTO RICO...CULEBRA...AND VIEQUES * DOMINICAN REPUBLIC FROM CABO ENGANO TO PUERTO PLATA * TURKS AND CAICOS ISLANDS AND THE SOUTHEASTERN BAHAMAS A TROPICAL STORM WARNING IS IN EFFECT FOR... * DOMINICAN REPUBLIC WEST OF PUERTO PLATA TO THE NORTHERN BORDER OF THE DOMINICAN REPUBLIC AND HAITI * DOMINICAN REPUBLIC WEST OF CABO ENGANO TO PUNTA PALENQUE A HURRICANE WATCH IS IN EFFECT FOR... * DOMINICAN REPUBLIC FROM ISLA SAONA TO CABO ENGANO A HURRICANE WARNING MEANS THAT HURRICANE CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA. 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. A HURRICANE WATCH MEANS THAT HURRICANE CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA. A WATCH IS TYPICALLY ISSUED 48 HOURS BEFORE THE ANTICIPATED FIRST OCCURRENCE OF TROPICAL-STORM-FORCE WINDS... CONDITIONS THAT MAKE OUTSIDE PREPARATIONS DIFFICULT OR DANGEROUS. INTERESTS ELSEWHERE IN HISPANIOLA AND THE BAHAMAS SHOULD MONITOR THE PROGRESS OF MARIA. HURRICANE CENTER LOCATED NEAR 18.4N 66.5W AT 20/1500Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE NORTHWEST OR 305 DEGREES AT 10 KT ESTIMATED MINIMUM CENTRAL PRESSURE 930 MB MAX SUSTAINED WINDS 120 KT WITH GUSTS TO 145 KT. 64 KT....... 50NE 45SE 35SW 40NW. 50 KT....... 80NE 70SE 60SW 80NW. 34 KT.......130NE 110SE 100SW 110NW. 12 FT SEAS..210NE 180SE 180SW 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 18.4N 66.5W AT 20/1500Z AT 20/1200Z CENTER WAS LOCATED NEAR 18.2N 66.1W FORECAST VALID 21/0000Z 19.2N 67.6W MAX WIND 120 KT...GUSTS 145 KT. 64 KT... 50NE 45SE 35SW 40NW. 50 KT... 80NE 80SE 60SW 80NW. 34 KT...140NE 120SE 110SW 120NW. FORECAST VALID 21/1200Z 20.2N 69.0W MAX WIND 125 KT...GUSTS 150 KT. 64 KT... 50NE 50SE 40SW 45NW. 50 KT... 80NE 80SE 60SW 80NW. 34 KT...140NE 120SE 110SW 120NW. FORECAST VALID 22/0000Z 21.2N 70.1W MAX WIND 125 KT...GUSTS 150 KT. 64 KT... 50NE 50SE 40SW 45NW. 50 KT... 90NE 80SE 60SW 80NW. 34 KT...140NE 130SE 110SW 130NW. FORECAST VALID 22/1200Z 22.4N 71.0W MAX WIND 120 KT...GUSTS 145 KT. 50 KT... 90NE 80SE 60SW 80NW. 34 KT...150NE 150SE 110SW 130NW. FORECAST VALID 23/1200Z 25.3N 72.4W MAX WIND 110 KT...GUSTS 135 KT. 50 KT...100NE 90SE 70SW 90NW. 34 KT...170NE 170SE 130SW 150NW. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM ON DAY 4 AND 200 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 24/1200Z 28.5N 73.0W MAX WIND 100 KT...GUSTS 120 KT. OUTLOOK VALID 25/1200Z 31.5N 73.0W MAX WIND 90 KT...GUSTS 110 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 18.4N 66.5W NEXT ADVISORY AT 20/2100Z $$ FORECASTER BERG

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Summary for Hurricane Maria (AT5/AL152017)

2017-09-20 15:52:53| National Hurricane Center (Atlantic)

...1000 AM AST POSITION UPDATE... ...CENTER OF MARIA OVER NORTHERN PUERTO RICO... As of 10:00 AM AST Wed Sep 20 the center of Maria was located near 18.4, -66.4 with movement NW at 13 mph. The minimum central pressure was 928 mb with maximum sustained winds of about 145 mph.

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Hurricane Maria Update Statement

2017-09-20 15:52:53| National Hurricane Center (Atlantic)

Issued at 1000 AM AST Wed Sep 20 2017 000 WTNT65 KNHC 201352 TCUAT5 Hurricane Maria Tropical Cyclone Update NWS National Hurricane Center Miami FL AL152017 1000 AM AST Wed Sep 20 2017 ...1000 AM AST POSITION UPDATE... ...CENTER OF MARIA OVER NORTHERN PUERTO RICO... A weather station near Arecibo, Puerto Rico, recently reported a sustained wind of 78 mph (126 km/h) and a wind gust of 108 mph (174 km/h). SUMMARY OF 1000 AM AST...1400 UTC...INFORMATION --------------------------------------------------- LOCATION...18.4N 66.4W ABOUT 20 MI...30 KM W OF SAN JUAN PUERTO RICO ABOUT 20 MI...35 KM ESE OF ARECIBO PUERTO RICO MAXIMUM SUSTAINED WINDS...145 MPH...230 KM/H PRESENT MOVEMENT...NW OR 305 DEGREES AT 13 MPH...20 KM/H MINIMUM CENTRAL PRESSURE...928 MB...27.40 INCHES $$ Forecaster Brennan

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