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Tropical Storm Helene Forecast Advisory Number 4
2018-09-08 10:50:34| National Hurricane Center (Atlantic)
Issued at 0900 UTC SAT SEP 08 2018 280 WTNT23 KNHC 080850 TCMAT3 TROPICAL STORM HELENE FORECAST/ADVISORY NUMBER 4 NWS NATIONAL HURRICANE CENTER MIAMI FL AL082018 0900 UTC SAT SEP 08 2018 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... NONE. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A TROPICAL STORM WARNING IS IN EFFECT FOR... * SANTIAGO... FOGO... AND BRAVA 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 13.7N 19.6W AT 08/0900Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE WEST OR 275 DEGREES AT 11 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1001 MB MAX SUSTAINED WINDS 40 KT WITH GUSTS TO 50 KT. 34 KT....... 0NE 30SE 70SW 0NW. 12 FT SEAS.. 30NE 60SE 120SW 0NW. 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 13.7N 19.6W AT 08/0900Z AT 08/0600Z CENTER WAS LOCATED NEAR 13.7N 18.9W FORECAST VALID 08/1800Z 13.9N 21.2W MAX WIND 50 KT...GUSTS 60 KT. 34 KT... 30NE 30SE 70SW 30NW. FORECAST VALID 09/0600Z 14.1N 23.5W MAX WIND 60 KT...GUSTS 75 KT. 50 KT... 20NE 20SE 20SW 20NW. 34 KT... 50NE 50SE 70SW 50NW. FORECAST VALID 09/1800Z 14.7N 26.3W 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 10/0600Z 15.4N 29.3W MAX WIND 75 KT...GUSTS 90 KT. 64 KT... 25NE 20SE 15SW 20NW. 50 KT... 40NE 30SE 30SW 30NW. 34 KT... 90NE 70SE 70SW 80NW. FORECAST VALID 11/0600Z 17.2N 35.1W 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 12/0600Z 19.0N 39.5W MAX WIND 70 KT...GUSTS 85 KT. OUTLOOK VALID 13/0600Z 22.0N 42.5W MAX WIND 65 KT...GUSTS 80 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 13.7N 19.6W NEXT ADVISORY AT 08/1500Z $$ FORECASTER ZELINSKY
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