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HURRICANE WILLA FORECAST/ADVISORY NUMBER   9
NWS NATIONAL HURRICANE CENTER MIAMI FL       EP242018
0900 UTC MON OCT 22 2018

CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY...

NONE.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT...

A HURRICANE WARNING IS IN EFFECT FOR...
* SAN BLAS TO MAZATLAN... INCLUDING LAS ISLAS MARIAS

A TROPICAL STORM WARNING IS IN EFFECT FOR...
* PLAYA PERULA TO SAN BLAS
* NORTH OF MAZATLAN TO BAHIA TEMPEHUAYA

A HURRICANE WARNING MEANS THAT HURRICANE CONDITIONS ARE EXPECTED
SOMEWHERE WITHIN THE WARNING AREA.  A WARNING IS TYPICALLY ISSUED
36 HOURS BEFORE THE ANTICIPATED FIRST OCCURRENCE OF
TROPICAL-STORM-FORCE WINDS... CONDITIONS THAT MAKE OUTSIDE
PREPARATIONS DIFFICULT OR DANGEROUS.  PREPARATIONS TO PROTECT LIFE
AND PROPERTY SHOULD BE RUSHED TO COMPLETION.

A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE
EXPECTED SOMEWHERE WITHIN THE WARNING AREA WITHIN 36 HOURS.

INTERESTS ELSEWHERE ALONG THE COASTS OF WEST-CENTRAL AND
SOUTHWESTERN MAINLAND MEXICO SHOULD MONITOR THE PROGRESS OF WILLA.

HURRICANE CENTER LOCATED NEAR 18.2N 107.1W AT 22/0900Z
POSITION ACCURATE WITHIN  15 NM

PRESENT MOVEMENT TOWARD THE NORTH OR 360 DEGREES AT   6 KT

ESTIMATED MINIMUM CENTRAL PRESSURE  931 MB
EYE DIAMETER  15 NM
MAX SUSTAINED WINDS 135 KT WITH GUSTS TO 165 KT.
64 KT....... 25NE  25SE  15SW  15NW.
50 KT....... 40NE  40SE  30SW  30NW.
34 KT....... 80NE  80SE  60SW  70NW.
12 FT SEAS..180NE 180SE 150SW 180NW.
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 18.2N 107.1W AT 22/0900Z
AT 22/0600Z CENTER WAS LOCATED NEAR 17.9N 107.1W

FORECAST VALID 22/1800Z 19.2N 107.2W
MAX WIND 135 KT...GUSTS 165 KT.
64 KT... 25NE  25SE  15SW  20NW.
50 KT... 40NE  40SE  30SW  40NW.
34 KT... 90NE  80SE  60SW  80NW.

FORECAST VALID 23/0600Z 20.4N 107.2W
MAX WIND 125 KT...GUSTS 150 KT.
64 KT... 25NE  25SE  15SW  20NW.
50 KT... 50NE  50SE  30SW  40NW.
34 KT...100NE 100SE  70SW  80NW.

FORECAST VALID 23/1800Z 21.8N 106.5W
MAX WIND 115 KT...GUSTS 140 KT.
64 KT... 25NE  25SE  20SW  20NW.
50 KT... 50NE  50SE  40SW  40NW.
34 KT...100NE 110SE  80SW  80NW.

FORECAST VALID 24/0600Z 23.8N 104.6W...INLAND WEST-CENTRAL MEXICO
MAX WIND  50 KT...GUSTS  60 KT.
50 KT... 20NE  20SE  20SW   0NW.
34 KT... 80NE  80SE  80SW  50NW.

FORECAST VALID 25/0600Z 27.0N  99.5W...POST-TROP/INLAND NRN MEXICO
MAX WIND  20 KT...GUSTS  30 KT.

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 26/0600Z...DISSIPATED INLAND

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 18.2N 107.1W

NEXT ADVISORY AT 22/1500Z

$$
FORECASTER STEWART


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