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Tropical Storm Helene Public Advisory Number 5

2018-09-08 16:44:07| National Hurricane Center (Atlantic)

Issued at 1100 AM AST Sat Sep 08 2018 480 WTNT33 KNHC 081444 TCPAT3 BULLETIN Tropical Storm Helene Advisory Number 5 NWS National Hurricane Center Miami FL AL082018 1100 AM AST Sat Sep 08 2018 ...HELENE CONTINUING WESTWARD TOWARD THE SOUTHERN CABO VERDE ISLANDS... ...TROPICAL STORM CONDITIONS EXPECTED TO REACH PORTIONS OF THE CABO VERDE ISLANDS TONIGHT... SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION ----------------------------------------------- LOCATION...13.4N 20.6W ABOUT 270 MI...440 KM ESE OF THE SOUTHERNMOST CABO VERDE ISLANDS MAXIMUM SUSTAINED WINDS...45 MPH...75 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 1100 AM AST (1500 UTC), the center of Tropical Storm Helene was located near latitude 13.4 North, longitude 20.6 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 are near 45 mph (75 km/h) with higher gusts. Strengthening is forecast for the next couple of days, and 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 intermediate advisory at 200 PM AST. Next complete advisory at 500 PM AST. $$ Forecaster Beven

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Tropical Storm Helene Forecast Advisory Number 5

2018-09-08 16:43:28| National Hurricane Center (Atlantic)

Issued at 1500 UTC SAT SEP 08 2018 ZCZC MIATCMAT3 ALL TTAA00 KNHC DDHHMM TROPICAL STORM HELENE FORECAST/ADVISORY NUMBER 5 NWS NATIONAL HURRICANE CENTER MIAMI FL AL082018 1500 UTC SAT SEP 08 2018 CHANGES IN WATCHES AND WARNINGS 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. TROPICAL STORM CENTER LOCATED NEAR 13.4N 20.6W AT 08/1500Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE WEST OR 265 DEGREES AT 11 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1001 MB MAX SUSTAINED WINDS 40 KT WITH GUSTS TO 50 KT. 34 KT....... 0NE 30SE 50SW 50NW. 12 FT SEAS.. 60NE 150SE 120SW 30NW. 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 13.4N 20.6W AT 08/1500Z AT 08/1200Z CENTER WAS LOCATED NEAR 13.5N 20.0W FORECAST VALID 09/0000Z 13.6N 22.4W MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 20NE 0SE 0SW 0NW. 34 KT... 40NE 40SE 70SW 50NW. FORECAST VALID 09/1200Z 13.9N 24.9W MAX WIND 60 KT...GUSTS 75 KT. 50 KT... 20NE 20SE 20SW 20NW. 34 KT... 50NE 50SE 70SW 50NW. FORECAST VALID 10/0000Z 14.6N 27.8W MAX WIND 70 KT...GUSTS 85 KT. 64 KT... 15NE 0SE 0SW 15NW. 50 KT... 30NE 30SE 30SW 30NW. 34 KT... 70NE 70SE 70SW 70NW. FORECAST VALID 10/1200Z 15.3N 30.8W MAX WIND 80 KT...GUSTS 100 KT. 64 KT... 25NE 20SE 15SW 20NW. 50 KT... 40NE 30SE 30SW 30NW. 34 KT... 90NE 70SE 70SW 80NW. FORECAST VALID 11/1200Z 17.0N 36.0W MAX WIND 80 KT...GUSTS 100 KT. 50 KT... 50NE 40SE 30SW 40NW. 34 KT...110NE 70SE 70SW 100NW. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 12/1200Z 19.0N 40.0W MAX WIND 70 KT...GUSTS 85 KT. OUTLOOK VALID 13/1200Z 22.5N 42.5W MAX WIND 60 KT...GUSTS 75 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 13.4N 20.6W NEXT ADVISORY AT 08/2100Z $$ FORECASTER BEVEN NNNN

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Tropical Storm Helene Graphics

2018-09-08 13:45:12| National Hurricane Center (Atlantic)

5-Day Uncertainty Track last updated Sat, 08 Sep 2018 11:45:12 GMT Wind Speed Probabilities last updated Sat, 08 Sep 2018 09:28:35 GMT

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Tropical Storm Helene Public Advisory Number 4A

2018-09-08 13:44:05| National Hurricane Center (Atlantic)

Issued at 800 AM AST Sat Sep 08 2018 029 WTNT33 KNHC 081144 TCPAT3 BULLETIN Tropical Storm Helene Intermediate Advisory Number 4A NWS National Hurricane Center Miami FL AL082018 800 AM AST Sat Sep 08 2018 ...HELENE MOVING WESTWARD TOWARD THE SOUTHERN CABO VERDE ISLANDS... ...TROPICAL STORM CONDITIONS EXPECTED TO REACH PORTIONS OF THE CABO VERDE ISLANDS TONIGHT... SUMMARY OF 800 AM AST...1200 UTC...INFORMATION ---------------------------------------------- LOCATION...13.6N 20.2W ABOUT 290 MI...465 KM ESE OF THE SOUTHERNMOST CABO VERDE ISLANDS MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H PRESENT MOVEMENT...W OR 275 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 800 AM AST (1200 UTC), the center of Tropical Storm Helene was located near latitude 13.6 North, longitude 20.2 West. Helene is moving toward the west near 13 mph (20 km/h). This general motion will likely continue through the weekend. A gradual turn toward the west-northwest with an increase in forward speed is expected early next week. On the forecast track, Helene will pass very close to the southern Cabo Verde Islands tonight and early Sunday. Maximum sustained winds are near 45 mph (75 km/h) with higher gusts. Additional strengthening is forecast for the next couple of days, and Helene is expected to become a hurricane on Sunday. Tropical-storm-force winds extend outward up to 80 miles (130 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 1100 AM AST. $$ Forecaster Beven

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