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Tropical Depression Grace Public Advisory Number 15
2021-08-17 04:44:22| National Hurricane Center (Atlantic)
Issued at 1100 PM EDT Mon Aug 16 2021 000 WTNT32 KNHC 170244 TCPAT2 BULLETIN Tropical Depression Grace Advisory Number 15 NWS National Hurricane Center Miami FL AL072021 1100 PM EDT Mon Aug 16 2021 ...EXTREME HEAVY RAIN CAUSING FLOODING ACROSS PORTIONS OF HISPANIOLA... ...GRACE FORECAST TO BECOME A TROPICAL STORM ON TUESDAY... SUMMARY OF 1100 PM EDT...0300 UTC...INFORMATION ----------------------------------------------- LOCATION...18.2N 73.8W ABOUT 100 MI...165 KM WSW OF PORT AU PRINCE HAITI ABOUT 270 MI...435 KM E OF MONTEGO BAY JAMAICA MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H PRESENT MOVEMENT...W OR 280 DEGREES AT 14 MPH...22 KM/H MINIMUM CENTRAL PRESSURE...1006 MB...29.71 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The government of Cuba has issued a Tropical Storm Watch for the southern coast of the province of Pinar del Rio. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Southern coast of the Cuban provinces of Santiago de Cuba, Granma, Las Tunas, and Camaguey * Cayman Islands A Tropical Storm Watch is in effect for... * Entire coast of Haiti * Jamaica * Southern coast of the Cuban provinces of Ciego de Avila, Sancti Spiritus, Cienfuegos, Matanzas, and Pinar del Rio, as well as Isla de la Juventud. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area within 36 hours. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, generally within 48 hours. Interests in the Yucatan Peninsula of Mexico should monitor the progress of Grace. Watches may be required for portions of the Yucatan coast early Tuesday. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 1100 PM EDT (0300 UTC), the center of Tropical Depression Grace was located near latitude 18.2 North, longitude 73.8 West. The depression is moving toward the west near 14 mph (22 km/h). A general westward to west-northwestward motion is expected for the next several days. On the forecast track, the center of Grace will continue to move near or over the Tiburon Peninsula of Haiti during the next couple of hours, and then move between southeastern Cuba and Jamaica on Tuesday. Grace is forecast to move near the Cayman Islands Tuesday night and then approach the Yucatan peninsula of Mexico late Wednesday or early Thursday. Maximum sustained winds are near 35 mph (55 km/h) with higher gusts. Strengthening is forecast during the next few days, and Grace is forecast to become a tropical storm on Tuesday. Further strengthening is anticipated before Grace approaches the coast of Mexico in a few days. The estimated minimum central pressure is 1006 mb (29.71 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Grace can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT2, WMO header WTNT42 KNHC and on the web at www.hurricanes.gov/graphics_at2.shtml?key_messages. WIND: Tropical storm conditions are possible in Haiti overnight, and in Jamaica on Tuesday. Tropical storm conditions are expected along the southern coast of Cuba within the warning area on Tuesday, and over the Cayman Islands beginning late Tuesday into early Wednesday. Tropical storm conditions are possible along the southern coast of Cuba within the watch area Tuesday night and Wednesday. RAINFALL: Grace is expected to produce the following rainfall amounts: Over Haiti and the Dominican Republic...5 to 10 inches of rain with isolated maximum totals of 15 inches are expected across the southern terrain areas through Tuesday. This heavy rainfall may lead to flash and urban flooding, and possible mudslides. Over far southern Cuba, Jamaica, and the Cayman Islands....2 to 4 inches of rain with isolated maximum totals of 6 inches are expected through Thursday. This heavy rainfall may lead to flash and urban flooding. Over the northern Yucatan Peninsula...3 to 6 inches of rain with isolated maximum totals of 10 inches are expected Wednesday into Thursday, which may lead to areas of flash and urban flooding. SURF: Swells generated by Grace will continue to affect portions of Hispaniola over the next day or so, and will spread westward to Jamaica, the Cayman Islands, the southern coast of Cuba, and the Yucatan Peninsula of Mexico. 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 AM EDT. Next complete advisory at 500 AM EDT. $$ Forecaster Zelinsky
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