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Summary for Tropical Storm Helene (AT3/AL082018)
2018-09-08 23:01:10| National Hurricane Center (Atlantic)
...HELENE STRENGTHENING... ...TROPICAL STORM CONDITIONS EXPECTED TO REACH PORTIONS OF THE CABO VERDE ISLANDS TONIGHT... As of 5:00 PM AST Sat Sep 8 the center of Helene was located near 13.6, -21.7 with movement W at 13 mph. The minimum central pressure was 998 mb with maximum sustained winds of about 60 mph.
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Tropical Storm Helene Public Advisory Number 6
2018-09-08 23:01:10| National Hurricane Center (Atlantic)
Issued at 500 PM AST Sat Sep 08 2018 986 WTNT33 KNHC 082101 TCPAT3 BULLETIN Tropical Storm Helene Advisory Number 6 NWS National Hurricane Center Miami FL AL082018 500 PM AST Sat Sep 08 2018 ...HELENE STRENGTHENING... ...TROPICAL STORM CONDITIONS EXPECTED TO REACH PORTIONS OF THE CABO VERDE ISLANDS TONIGHT... SUMMARY OF 500 PM AST...2100 UTC...INFORMATION ---------------------------------------------- LOCATION...13.6N 21.7W ABOUT 155 MI...250 KM SE OF PRAIA IN THE CABO VERDE ISLANDS MAXIMUM SUSTAINED WINDS...60 MPH...95 KM/H PRESENT MOVEMENT...W OR 275 DEGREES AT 13 MPH...20 KM/H MINIMUM CENTRAL PRESSURE...998 MB...29.47 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 500 PM AST (2100 UTC), the center of Tropical Storm Helene was located near latitude 13.6 North, longitude 21.7 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 60 mph (95 km/h) with higher gusts. Additional strengthening is expected during the next few days, and Helene is forecast to become a hurricane on Sunday. Tropical-storm-force winds extend outward up to 60 miles (95 km) from the center. The estimated minimum central pressure is 998 mb (29.47 inches). HAZARDS AFFECTING LAND ---------------------- WIND: Tropical storm conditions are expected to first reach the warning area during the next several hours. 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 800 PM AST. Next complete advisory at 1100 PM AST. $$ Forecaster Beven
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Tropical Storm Helene Forecast Advisory Number 6
2018-09-08 22:58:09| National Hurricane Center (Atlantic)
Issued at 2100 UTC SAT SEP 08 2018 777 WTNT23 KNHC 082058 TCMAT3 TROPICAL STORM HELENE FORECAST/ADVISORY NUMBER 6 NWS NATIONAL HURRICANE CENTER MIAMI FL AL082018 2100 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 13.6N 21.7W AT 08/2100Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE WEST OR 275 DEGREES AT 11 KT ESTIMATED MINIMUM CENTRAL PRESSURE 998 MB MAX SUSTAINED WINDS 50 KT WITH GUSTS TO 60 KT. 50 KT....... 20NE 0SE 0SW 0NW. 34 KT....... 50NE 30SE 50SW 50NW. 12 FT SEAS..120NE 150SE 120SW 90NW. 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 13.6N 21.7W AT 08/2100Z AT 08/1800Z CENTER WAS LOCATED NEAR 13.5N 21.1W FORECAST VALID 09/0600Z 13.7N 23.5W MAX WIND 55 KT...GUSTS 65 KT. 50 KT... 20NE 0SE 0SW 20NW. 34 KT... 50NE 50SE 70SW 50NW. FORECAST VALID 09/1800Z 14.1N 26.2W MAX WIND 65 KT...GUSTS 80 KT. 64 KT... 20NE 0SE 0SW 20NW. 50 KT... 30NE 30SE 30SW 30NW. 34 KT... 70NE 70SE 70SW 70NW. FORECAST VALID 10/0600Z 14.7N 29.1W MAX WIND 75 KT...GUSTS 90 KT. 64 KT... 20NE 15SE 15SW 20NW. 50 KT... 30NE 30SE 30SW 30NW. 34 KT... 80NE 70SE 70SW 80NW. FORECAST VALID 10/1800Z 15.5N 32.0W MAX WIND 85 KT...GUSTS 105 KT. 64 KT... 25NE 20SE 15SW 20NW. 50 KT... 40NE 30SE 30SW 40NW. 34 KT... 90NE 70SE 70SW 80NW. FORECAST VALID 11/1800Z 17.5N 37.0W MAX WIND 85 KT...GUSTS 105 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 12/1800Z 19.5N 40.5W MAX WIND 65 KT...GUSTS 80 KT. OUTLOOK VALID 13/1800Z 23.0N 42.5W MAX WIND 55 KT...GUSTS 65 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 13.6N 21.7W NEXT ADVISORY AT 09/0300Z $$ FORECASTER BEVEN
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Tropical Storm Helene Graphics
2018-09-08 19:37:46| National Hurricane Center (Atlantic)
5-Day Uncertainty Track last updated Sat, 08 Sep 2018 17:37:46 GMT Wind Speed Probabilities last updated Sat, 08 Sep 2018 15:28:33 GMT
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Summary for Tropical Storm Helene (AT3/AL082018)
2018-09-08 19:36:09| National Hurricane Center (Atlantic)
...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... As of 2:00 PM AST Sat Sep 8 the center of Helene was located near 13.4, -21.1 with movement W at 13 mph. The minimum central pressure was 1001 mb with maximum sustained winds of about 50 mph.
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