000 WTNT35 KNHC 181455 TCPAT5 BULLETIN Tropical Storm Don Advisory Number 4 NWS National Hurricane Center Miami FL AL052017 1100 AM AST Tue Jul 18 2017 ...RECONNAISSANCE AIRCRAFT FINDS DON WEAKER AS IT HEADS TOWARD THE WINDWARD ISLANDS... SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION ----------------------------------------------- LOCATION...11.5N 58.0W ABOUT 155 MI...250 KM SE OF BARBADOS ABOUT 255 MI...410 KM E OF GRENADA MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H PRESENT MOVEMENT...W OR 275 DEGREES AT 20 MPH...31 KM/H MINIMUM CENTRAL PRESSURE...1011 MB...29.86 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The government of St. Lucia has discontinued the Tropical Storm Watch for St. Lucia. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Grenada * St. Vincent and the Grenadines A Tropical Storm Watch is in effect for... * Barbados * Bonaire Interests in Trinidad and Tobago, Aruba, and Curacao should monitor the progress of Don. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND 48-HOUR OUTLOOK ------------------------------ At 1100 AM AST (1500 UTC), the center of Tropical Storm Don was located near latitude 11.5 North, longitude 58.0 West. Don is moving toward the west near 20 mph (31 km/h). This general motion is expected through Wednesday. On the forecast track, the center of Don will move across the Windward Islands later today or tonight, and then move westward across the southeastern Caribbean Sea on Wednesday. Reports from an Air Force Reserve reconnaissance aircraft indicate that the maximum sustained winds have decreased to near 40 mph (65 km/h) with higher gusts. Little change in strength is forecast before Don moves through the Windward Islands. The tropical storm is forecast to degenerate into a trough of low pressure late Wednesday or Wednesday night. Tropical-storm-force winds extend outward up to 35 miles (55 km) from the center. The estimated minimum central pressure is 1011 mb (29.86 inches). HAZARDS AFFECTING LAND ---------------------- WIND: Tropical storm conditions are expected in the warning area by late this afternoon and tonight. Tropical storm conditions are possible in the watch area by tonight. RAINFALL: Don is expected to produce total rain accumulations of 3 to 6 inches, with isolated higher amounts across Barbados, Trinidad and Tobago, and the southern Windward Islands through Wednesday. These rains could produce life-threatening flash floods and mudslides, especially in mountainous areas. NEXT ADVISORY ------------- Next intermediate advisory at 200 PM AST. Next complete advisory at 500 PM AST. $$ Forecaster Brown
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