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TROPICAL STORM IRWIN FORECAST/ADVISORY NUMBER  20
NWS NATIONAL HURRICANE CENTER MIAMI FL       EP102017
0900 UTC THU JUL 27 2017
 
THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT.
 
TROPICAL STORM CENTER LOCATED NEAR 14.7N 123.8W AT 27/0900Z
POSITION ACCURATE WITHIN  20 NM
 
PRESENT MOVEMENT TOWARD THE WEST-SOUTHWEST OR 255 DEGREES AT   5 KT
 
ESTIMATED MINIMUM CENTRAL PRESSURE  997 MB
MAX SUSTAINED WINDS  50 KT WITH GUSTS TO  60 KT.
50 KT.......  0NE   0SE   0SW  20NW.
34 KT....... 70NE  50SE  50SW  70NW.
12 FT SEAS.. 90NE  60SE  60SW  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 14.7N 123.8W AT 27/0900Z
AT 27/0600Z CENTER WAS LOCATED NEAR 14.8N 123.6W
 
FORECAST VALID 27/1800Z 14.6N 124.4W
MAX WIND  50 KT...GUSTS  60 KT.
50 KT...  0NE   0SE   0SW  20NW.
34 KT... 70NE  50SE  50SW  70NW.
 
FORECAST VALID 28/0600Z 14.5N 124.8W
MAX WIND  55 KT...GUSTS  65 KT.
50 KT... 30NE  20SE  20SW  30NW.
34 KT... 80NE  60SE  60SW  80NW.
 
FORECAST VALID 28/1800Z 14.3N 124.7W
MAX WIND  55 KT...GUSTS  65 KT.
50 KT... 30NE  20SE  20SW  30NW.
34 KT... 80NE  60SE  60SW  80NW.
 
FORECAST VALID 29/0600Z 14.7N 124.3W
MAX WIND  55 KT...GUSTS  65 KT.
50 KT... 30NE  20SE  20SW  30NW.
34 KT... 80NE  60SE  60SW  80NW.
 
FORECAST VALID 30/0600Z 17.8N 124.4W
MAX WIND  50 KT...GUSTS  60 KT.
50 KT... 20NE  10SE  10SW  20NW.
34 KT... 70NE  50SE  50SW  70NW.
 
EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 100 NM
ON DAY 4 AND 150 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY
 
OUTLOOK VALID 31/0600Z 22.0N 128.0W
MAX WIND  40 KT...GUSTS  50 KT.
 
OUTLOOK VALID 01/0600Z 24.5N 133.5W
MAX WIND  35 KT...GUSTS  45 KT.
 
REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 14.7N 123.8W
 
NEXT ADVISORY AT 27/1500Z
 
$$
FORECASTER ROBERTS
 
 
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