668
WTPA21 PHFO 310841
TCMCP1
TROPICAL STORM IONA FORECAST/ADVISORY NUMBER 17
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI CP012025
ISSUED BY NWS NATIONAL HURRICANE CENTER MIAMI FL
0900 UTC THU JUL 31 2025
TROPICAL STORM CENTER LOCATED NEAR 12.3N 166.9W AT 31/0900Z
POSITION ACCURATE WITHIN 30 NM
PRESENT MOVEMENT TOWARD THE WEST OR 280 DEGREES AT 20 KT
ESTIMATED MINIMUM CENTRAL PRESSURE 1001 MB
MAX SUSTAINED WINDS 45 KT WITH GUSTS TO 55 KT.
34 KT....... 50NE 30SE 30SW 50NW.
4 M SEAS....220NE 100SE 60SW 160NW.
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 12.3N 166.9W AT 31/0900Z
AT 31/0600Z CENTER WAS LOCATED NEAR 12.1N 165.9W
FORECAST VALID 31/1800Z 12.7N 169.8W
MAX WIND 40 KT...GUSTS 50 KT.
34 KT... 40NE 20SE 20SW 40NW.
FORECAST VALID 01/0600Z 13.5N 173.3W
MAX WIND 35 KT...GUSTS 45 KT.
34 KT... 40NE 20SE 10SW 30NW.
FORECAST VALID 01/1800Z 14.1N 176.7W
MAX WIND 35 KT...GUSTS 45 KT.
34 KT... 40NE 20SE 10SW 30NW.
FORECAST VALID 02/0600Z 14.9N 179.6W
MAX WIND 35 KT...GUSTS 45 KT.
34 KT... 40NE 20SE 10SW 20NW.
FORECAST VALID 02/1800Z 15.8N 177.9E
MAX WIND 35 KT...GUSTS 45 KT.
34 KT... 60NE 20SE 10SW 20NW.
FORECAST VALID 03/0600Z 16.6N 175.7E
MAX WIND 35 KT...GUSTS 45 KT.
34 KT... 60NE 20SE 10SW 20NW.
EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM
ON DAY 4 AND 200 NM ON DAY 5...AND FOR INTENSITY NEAR 20 KT EACH DAY
OUTLOOK VALID 04/0600Z 18.4N 171.3E
MAX WIND 30 KT...GUSTS 40 KT.
OUTLOOK VALID 05/0600Z 20.5N 167.1E
MAX WIND 30 KT...GUSTS 40 KT.
REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 12.3N 166.9W
NEXT ADVISORY AT 31/1500Z
FORECASTER GIBBS (CPHC)
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