Hurricane Helene Forecast Advisory Number 9

By | September 25, 2024

000
WTNT24 KNHC 251456
TCMAT4

HURRICANE HELENE FORECAST/ADVISORY NUMBER   9
NWS NATIONAL HURRICANE CENTER MIAMI FL       AL092024
1500 UTC WED SEP 25 2024

HURRICANE CENTER LOCATED NEAR 21.6N  86.3W AT 25/1500Z
POSITION ACCURATE WITHIN  20 NM

PRESENT MOVEMENT TOWARD THE NORTH-NORTHWEST OR 330 DEGREES AT   9 KT

ESTIMATED MINIMUM CENTRAL PRESSURE  979 MB
MAX SUSTAINED WINDS  70 KT WITH GUSTS TO  85 KT.
64 KT....... 20NE  20SE   0SW   0NW.
50 KT....... 60NE  60SE   0SW  40NW.
34 KT.......210NE 240SE  60SW  90NW.
12 FT SEAS..180NE 180SE  90SW  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 21.6N  86.3W AT 25/1500Z
AT 25/1200Z CENTER WAS LOCATED NEAR 21.1N  86.2W

FORECAST VALID 26/0000Z 23.0N  86.4W
MAX WIND  85 KT...GUSTS 105 KT.
64 KT... 20NE  20SE   0SW   0NW.
50 KT... 70NE  80SE  30SW  40NW.
34 KT...270NE 270SE  90SW 120NW.

FORECAST VALID 26/1200Z 25.7N  85.7W
MAX WIND 105 KT...GUSTS 130 KT.
64 KT... 40NE  40SE  20SW  20NW.
50 KT...100NE 100SE  50SW  60NW.
34 KT...240NE 250SE 120SW 140NW.

FORECAST VALID 27/0000Z 29.7N  84.6W
MAX WIND 110 KT...GUSTS 135 KT.
64 KT... 40NE  40SE  20SW  25NW.
50 KT... 80NE  90SE  40SW  50NW.
34 KT...250NE 250SE 100SW 100NW.

FORECAST VALID 27/1200Z 34.3N  85.0W...INLAND
MAX WIND  50 KT...GUSTS  60 KT.
50 KT... 30NE  30SE   0SW   0NW.
34 KT... 70NE 330SE  40SW  40NW.

FORECAST VALID 28/0000Z 36.6N  86.9W...POST-TROP/INLAND
MAX WIND  30 KT...GUSTS  40 KT.

FORECAST VALID 28/1200Z 36.9N  87.8W...POST-TROP/INLAND
MAX WIND  20 KT...GUSTS  30 KT.

EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 125 NM
ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY

OUTLOOK VALID 29/1200Z 36.6N  87.9W...POST-TROP/INLAND
MAX WIND  15 KT...GUSTS  20 KT.

OUTLOOK VALID 30/1200Z...DISSIPATED

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 21.6N  86.3W

INTERMEDIATE PUBLIC ADVISORY...WTNT34 KNHC/MIATCPAT4...AT 25/1800Z

NEXT ADVISORY AT 25/2100Z

$$
FORECASTER BERG


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