Thursday, December 3, 2020

Hurricane Center: Tropical Storm Laura dumps heavy rains over Puerto Rico

By on August 22, 2020

(Screen capture of https://www.nhc.noaa.gov)
(Screen capture of https://www.nhc.noaa.gov)

SAN JUAN — The National Hurricane Center in Miami has issued Tropical Storm Laura Intermediate Advisory Number 12:

500 PM AST Sat Aug 22 2020

SUMMARY OF 500 PM AST…2100 UTC…INFORMATION
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LOCATION…18.0N 68.1W ABOUT 100 MI…160 KM W OF PONCE PUERTO RICO ABOUT 125 MI…200 KM ESE OF SANTO DOMINGO DOMINICAN REPUBLIC MAXIMUM SUSTAINED WINDS…50 MPH…85 KM/H PRESENT MOVEMENT…W OR 280 DEGREES AT 18 MPH…30 KM/H MINIMUM CENTRAL PRESSURE…1004 MB…29.65 INCHES

WATCHES AND WARNINGS
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CHANGES WITH THIS ADVISORY:

A Tropical Storm Watch has been issued for the Florida Keys from Ocean Reef to Key West and for the Dry Tortugas, including Florida Bay.

The government of Cuba has issued a Tropical Storm Warning for the Cuban provinces of Camaguey, Las Tunas, Holguin, Guantanamo, Santiago de Cuba, and Granma.

The government of the Bahamas has issued a Tropical Storm Watch for Andros Island.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Tropical Storm Warning is in effect for… * Puerto Rico, Vieques and Culebra * U.S. Virgin Islands * The northern coast of the Dominican Republic from Cabo Engano to the border with Haiti * The southern coast of the Dominican Republic from Cabo Engano to Punta Palenque * The northern coast of Haiti from Le Mole St. Nicholas to the border with the Dominican Republic * The southeastern Bahamas and the Turks and Caicos Islands * Cuban provinces of Camaguey, Las Tunas, Holguin, Guantanamo, Santiago de Cuba, and Granma

A Tropical Storm Watch is in effect for… * The central Bahamas * Andros Island * Florida Keys from Ocean Reef to Key West and the Dry Tortugas * Florida Bay

A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area.

A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, generally within 48 hours.

Interests elsewhere in Cuba should monitor the progress of Laura. Additional tropical storm watches or warnings may be needed there tonight.

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
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At 500 PM AST (2100 UTC), the center of Tropical Storm Laura was located near latitude 18.0 North, longitude 68.1 West. Laura is moving toward the west near 18 mph (30 km/h), and a generally west-northwestward motion is expected over the next few days. On the forecast track, the center of Laura will move away from Puerto Rico this evening, near or over Hispaniola tonight, near or over Cuba Sunday and Monday, and into the southeastern Gulf of Mexico Monday night and Tuesday.

Maximum sustained winds are near 50 mph (85 km/h) with higher gusts. No significant changes in strength are forecast during the next 48 hours while Laura moves near or over Hispaniola and Cuba. Some strengthening is forecast once Laura moves into the Gulf of Mexico Monday night and Tuesday.

Tropical-storm-force winds extend outward up to 205 miles (335 km) from the center. A Weatherflow station at Las Mareas in Puerto Rico recently reported sustained winds of 34 mph (55 km/h) and a wind gust to 40 mph (64 km/h).

The estimated minimum central pressure is 1004 mb (29.65 inches).

HAZARDS AFFECTING LAND
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RAINFALL: Laura is expected to produce the following rainfall accumulations through Monday:

Puerto Rico and the Virgin Islands: 3 to 6 inches, with maximum amounts of 8 inches possible along eastern portions and the southern slopes.

Dominican Republic and Haiti: 4 to 8 inches, with maximum amounts of 12 inches across southern areas.

Cuba: 3 to 6 inches, with isolated amounts of 8 inches.

This heavy rainfall could lead to life-threatening flash and urban flooding, and the potential for mudslides across the Greater Antilles. Widespread minor to potential moderate river flooding is possible in Puerto Rico.

1 to 3 inches of rain, with isolated maximum totals of 5 inches, is expected over the northern Leeward Islands, the Turks and Caicos, southeast Bahamas and Jamaica.

WIND: Tropical storm conditions are expected within portions of the warning area today through Sunday. Tropical storm conditions are possible within portions of the watch area Sunday night and Monday.

SURF: Swells generated by Laura are affecting portions of the northern Leeward Islands. These swells are expected to spread across the northern coasts of Puerto Rico, Hispaniola, Cuba, much of the Bahamas, and the Florida Keys during the next few days. Please consult products from your local weather office.

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