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| #939088 (Received by flhurricane at: 1:39 PM 08.Sep.2018) TCPAT3 BULLETIN Tropical Storm Helene Intermediate Advisory Number 5A NWS National Hurricane Center Miami FL AL082018 200 PM AST Sat Sep 08 2018 ...HELENE BECOMING BETTER ORGANIZED AS IT MOVES TOWARD THE SOUTHERN CABO VERDE ISLANDS... ...TROPICAL STORM CONDITIONS EXPECTED TO REACH PORTIONS OF THE CABO VERDE ISLANDS TONIGHT... SUMMARY OF 200 PM AST...1800 UTC...INFORMATION ---------------------------------------------- LOCATION...13.4N 21.1W ABOUT 195 MI...440 KM ESE OF PRAIA IN THE CABO VERDE ISLANDS MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H PRESENT MOVEMENT...W OR 265 DEGREES AT 13 MPH...20 KM/H MINIMUM CENTRAL PRESSURE...1001 MB...29.56 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Watch is in effect for... * The Cabo Verde islands of Santiago, Fogo, and Brava A Tropical Storm Warning is in effect for... * The Cabo Verde islands of Santiago, Fogo, and Brava A Hurricane Watch means that hurricane conditions are possible within the watch area, in this case within the next 24 to 36 hours. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, in this case within the next 24 to 36 hours. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 200 PM AST (1800 UTC), the center of Tropical Storm Helene was located near latitude 13.4 North, longitude 21.1 West. Helene is moving toward the west near 13 mph (20 km/h), and this general motion will likely continue through Sunday. A gradual turn toward the west-northwest with an increase in forward speed is expected Sunday night through Tuesday. On the forecast track, Helene will pass very close to the southern Cabo Verde Islands tonight and early Sunday. Maximum sustained winds have increased to near 50 mph (85 km/h) with higher gusts. Satellite imagery indicates that Helene is becoming better organized, and strengthening is forecast for the next couple of days. Helene is expected to become a hurricane on Sunday or Sunday night. Tropical-storm-force winds extend outward up to 60 miles (95 km) from the center. The estimated minimum central pressure is 1001 mb (29.56 inches). HAZARDS AFFECTING LAND ---------------------- WIND: Tropical storm conditions are expected to first reach the warning area tonight or early Sunday. Hurricane conditions are possible in the southernmost Cabo Verde Islands on Sunday. RAINFALL: Helene is expected to produce total rain accumulations of 3 to 5 inches over the southern Cabo Verde Islands through Sunday, with isolated maximum amounts of 8 inches. This rainfall may produce life-threatening flash floods. NEXT ADVISORY ------------- Next complete advisory at 500 PM AST. $$ Forecaster Beven |
