Gap Winds Forecast



December 10, 2018, 8:30 pm (UTC: -08:00)
Subject: Gap Winds Forecast


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This forecast has not been reviewed. It was generated from an automatic model.

...GALE WARNING...
.WITHIN 60 NM EITHER SIDE OF A LINE FROM 16N95W TO 14N95.5W TO
12N97W...INCLUDING GULF OF TEHUANTEPEC...N TO NE WINDS 35 TO 45
KT. SEAS 12 TO 19 FT...BUILDING TO 20 FT. ELSEWHERE WITHIN 90 NM
EITHER SIDE OF A LINE FROM 16N95W TO 12N97W TO 11N98W NE WINDS
20 TO 30 KT. SEAS 8 TO 15 FT. REMAINDER AREA N OF 8.5N BETWEEN
93W AND 103W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN NE SWELL.
.24 HOUR FORECAST WITHIN 45 NM EITHER SIDE OF A LINE FROM 16N95W
TO 13N96W...INCLUDING GULF OF TEHUANTEPEC...N TO NE WINDS 30 TO
40 KT. SEAS 14 TO 16 FT. ELSEWHERE WITHIN 90 NM EITHER SIDE OF A
LINE FROM 16N95W TO 13N96W TO 11N98W NE WINDS 20 TO 30 KT. SEAS
12 TO 14 FT. REMAINDER OF AREA N OF 04N BETWEEN 90W AND 108W
WINDS 20 KT OR LESS. SEAS 8 TO 12 FT IN NE SWELL.
.36 HOUR FORECAST N OF 13N BETWEEN 94W AND 97W...INCLUDING GULF
OF TEHUANTEPEC...N TO NE WINDS 20 TO 30 KT. SEAS 8 TO 12 FT.
ELSEWHERE N OF 02N BETWEEN 90W AND 112W WINDS 20 KT OR LESS.
SEAS 8 TO 11 FT IN NE SWELL.
.45 HOUR FORECAST FROM 1.5N TO 16.5N BETWEEN 90W AND 110W WINDS
20 KT OR LESS. SEAS 8 TO 9 FT IN MIXED SWELL.
.48 HOUR FORECAST LITTLE CHANGE.

.SYNOPSIS AND FORECAST.

.06 HOUR FORECAST GULF OF PAPAGAYO FROM 10N TO 11.5N E OF 88W NE
WINDS 20 TO 30 KT. SEAS BUILDING TO 9 FT.
.24 HOUR FORECAST FROM 09N TO 11.5N E OF 88W...INCLUDING THE
GULF OF PAPAGAYO...NE WINDS 20 TO 30 KT. SEAS TO 9 FT.
.45 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST LITTLE CHANGE.

.COLD FRONT FROM 30N127W TO 24N137W. W OF A LINE FROM 30N117W TO
10N125W TO 05N140W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN NW
SWELL.
.12 HOUR FORECAST COLD FRONT DISSIPATED. FROM 08N TO 27N W OF
128W NE WINDS 20 TO 25 KT. SEAS 9 TO 11 FT. ELSEWHERE W OF A
LINE FROM 30N116W TO 12N123W TO 03N140W WINDS 20 KT OR LESS.
SEAS 8 TO 9 FT IN NW SWELL.
.24 HOUR FORECAST FROM 16N TO 26N W OF 131W NE WINDS 20 TO 25
KT. SEAS 9 TO 10 FT. ELSEWHERE W OF A LINE FROM 32N118W TO
24N113W TO 13N116W TO 02N127W TO 0N140W WINDS 20 KT OR LESS.
SEAS 8 TO 11 FT IN NW SWELL.
.48 HOUR FORECAST FROM 12N TO 16N BETWEEN 124W AND 133W NE TO E
WINDS 20 TO 25 KT. SEAS TO 9 FT. W OF A LINE FROM 30N118W TO
16N110W TO 0N122W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN MIXED
SWELL.

.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

CONVECTION VALID AT 0230 UTC TUE DEC 11...

.TROUGH 120W FROM 08N TO 14N. SCATTERED MODERATE CONVECTION FROM
07N TO 12N BETWEEN 118W AND 122W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH EXTENDS FROM 05N77W TO 05N83W TO 04N91W WHERE IT
TRANSITIONS TO THE ITCZ. ITCZ THEN EXTENDS ALONG 06N102W TO
08N109W TO 08N118W. ITCZ RESUMES W OF A SURFACE TROUGH FROM
07N122W AND CONTINUES PAST 06N140W. SCATTERED MODERATE ISOLATED
STRONG CONVECTION IS FROM 02N TO 13N W OF 124W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH EXTENDS FROM 05N77W TO 05N83W TO 04N91W WHERE IT
TRANSITIONS TO THE ITCZ. ITCZ THEN EXTENDS ALONG 06N102W TO
08N109W TO 08N118W. ITCZ RESUMES W OF A SURFACE TROUGH FROM
07N122W AND CONTINUES PAST 06N140W. SCATTERED MODERATE ISOLATED
STRONG CONVECTION IS FROM 02N TO 13N W OF 124W.

THE MONSOON TROUGH EXTENDS FROM 05N77W TO 05N83W TO 04N91W WHERE
IT TRANSITIONS TO THE ITCZ. THE ITCZ THEN EXTENDS ALONG 06N102W
TO 08N109W TO 08N118W. THE ITCZ THEN RESUMES WEST OF A SURFACE
TROUGH FROM 07N122W AND CONTINUES PAST 06N140W. SCATTERED
MODERATE ISOLATED STRONG CONVECTION IS OCCURRING FROM 02N TO 13N
WEST OF 124W.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
ELSEWHERE, GENTLE TO MODERATE WINDS WILL PERSIST ON EITHER SIDE
OF A WEAKENING MONSOON TROUGH AND SEAS IN THE RANGE OF 4 TO 6 FT.

.06 HOUR FORECAST GULF OF PAPAGAYO FROM 10N TO 11.5N E OF 88W NE
WINDS 20 TO 30 KT. SEAS BUILDING TO 9 FT.
.24 HOUR FORECAST FROM 09N TO 11.5N E OF 88W...INCLUDING THE
GULF OF PAPAGAYO...NE WINDS 20 TO 30 KT. SEAS TO 9 FT.

GULF OF PAPAGAYO...WINDS WILL PULSE TO NEAR GALE FORCE SPEEDS
DURING THE OVERNIGHT AND EARLY MORNING HOURS OVER THE GULF OF
PAPAGAYO TONIGHT AND TUE NIGHT, THEN TO MAINLY FRESH TO STRONG
SPEEDS WED NIGHT AS HIGH PRESSURE OVER THE GULF OF MEXICO BUILDS
SOUTHEASTWARD TOWARD THE NW CARIBBEAN SEA AND CENTRAL AMERICA.
WAVE MODEL GUIDANCE SUGGESTS THAT A RATHER LARGE AREA OF 8 FT
SEAS ASSOCIATED WITH MIXED SWELL WILL STRETCH FROM ABOUT 02N TO
15N BETWEEN 92W AND 110W AS A RESULT OF LONG-PERIOD NORTHWEST
SWELL MIXING WITH SHORTER PERIOD NORTHEAST SWELL THAT PROPAGATE
DOWNSTREAM FROM THE GULF OF TEHUANTEPEC AND TO A SMALLER EXTENT
THOSE INDUCED BY THE GULF OF PAPAGAYO STRONG NOCTURNAL PULSING
NORTHEAST WINDS. THIS AREA OF SWELL WILL BEGIN TO MERGE WITH AN
EVEN LARGER AREA OF SEAS ASSOCIATED WITH NORTHWEST SWELL WHICH
WILL COVER ALMOST ALL OF THE FORECAST AREA WEST OF AROUND 92W BY
WED.

SHORT-TERM GAP WINDS (Near 11N 86W)
TODAY - ENE 20-27, Seas NE 5-9 feet @ 5sec
TONITE - ENE 26-35, Seas NE 6-10 feet @ 5sec
TUESDAY - ENE 28-38, Seas NE 8-12 feet @ 6sec
TUESDAY NIGHT - ENE 24-33, Seas NE 6-9 feet @ 5sec

LONG-TERM GAP WINDS (Near 11N 86W)
WEDNESDAY - ENE 24-33, Seas NE 6-9 feet @ 5sec
THURSDAY - ENE 17-23, Seas SW 4-7 feet @ 13sec
FRIDAY - ENE 16-22, Seas SW 4-7 feet @ 13sec
SATURDAY - ENE 21-29, Seas NE 5-8 feet @ 5sec
SUNDAY - ENE 24-33, Seas NE 5-9 feet @ 5sec