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000
FZPN03 KNHC 181802 AAA
HSFEP2

HIGH SEAS FORECAST...AMENDED
NWS NATIONAL HURRICANE CENTER MIAMI FL
1630 UTC SAT MAY 18 2013

UPDATED FOR POSSIBLE TROPICAL CYCLONE WORDING AT 24 HOURS FOR
REMNANTS OF ALVIN

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS

SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE
HEIGHT OF THE HIGHEST 1/3 OF THE WAVES. INDIVIDUAL WAVES MAY BE
MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.

SECURITE

E PACIFIC FROM THE EQUATOR TO 30N E OF 140W.

SYNOPSIS VALID 1200 UTC SAT MAY 18.
24 HOUR FORECAST VALID 1200 UTC SUN MAY 19.
48 HOUR FORECAST VALID 1200 UTC MON MAY 20.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST

.LOW PRES...REMNANTS OF ALVIN...NEAR 12N116W 1007 MB MOVING W 10
KT. WITHIN 210 NM NE SEMICIRCLE AND SE QUADRANT OF LOW WINDS 20
TO 30 KT. SEAS 9 TO 11 FT. ELSEWHERE WITHIN 270 NM OF LOW EXCEPT
570 NM SW QUADRANT WINDS 20 KT OR LESS. SEAS 8 TO 10 FT
PRIMARILY IN BROAD MIX OF SWELL. REMAINDER AREA S OF 05N BETWEEN
100W AND 126W WINDS 20 KT OR LESS. SEAS TO 9 FT IN SW SWELL.
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
12N119W 1008 MB. WITHIN 210 NM NE SEMICIRCLE OF LOW WINDS 20 TO
25 KT. SEAS 9 TO 11 FT. ELSEWHERE WITHIN 500 NM NW OF LOW AND
FROM 11N TO 16N BETWEEN 127W AND 137W WINDS 20 KT OR LESS. SEAS
TO 9 FT IN BROAD MIX OF SWELL. REMAINDER AREA S OF 05N BETWEEN
94W AND 128W WINDS 20 KT OR LESS. SEAS TO 9 FT IN SW SWELL.
.48 HOUR FORECAST LOW PRES...REMNANTS OF ALVIN...NEAR 12N123W
1009 MB. WITHIN 150 NM N SEMICIRCLE OF LOW WINDS 20 TO 25 KT.
SEAS 8 TO 10 FT. ELSEWHERE WITHIN 330 NM OF LOW WINDS 20 KT OR
LESS. SEAS TO 9 FT IN BROAD MIX OF SWELL. REMAINDER AREA S OF
07N BETWEEN 93W AND 127W WINDS 20 KT OR LESS. SEAS TO 9 FT IN SW
SWELL.

.W OF A LINE FROM 21N140W TO 12N127W TO 06N140W WINDS 20 KT OR
LESS. SEAS TO 9 FT IN MIXED NE AND SW SWELL.
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.30 HOUR FORECAST N OF 29N BETWEEN 118W AND 123W WINDS 20 KT OR
LESS. SEAS TO 8 FT IN PRIMARILY NW SWELL.
.48 HOUR FORECAST N OF 27N BETWEEN 118W AND 128W WINDS 20 KT OR
LESS. SEAS TO 9 FT IN PRIMARILY NW SWELL.

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

CONVECTION VALID 1330 UTC SAT MAY 18...
.REMNANTS OF ALVIN NEAR 12N116W...NUMEROUS MODERATE TO STRONG
BETWEEN 60 NM AND 180 NM E QUADRANT. SCATTERED MODERATE ISOLATED
STRONG ELSEWHERE FROM 07N TO 16N BETWEEN 111W AND 118W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH AXIS FROM 09N78W TO 10N89W TO 06N102W TO REMNANTS
OF ALVIN TO 10N120W TO 09N123W. ITCZ AXIS FROM 09N123W TO
08N131W TO 04N140W. SCATTERED MODERATE TO STRONG WITHIN 90 NM S
OF AXIS BETWEEN 86W AND COSTA RICA. SCATTERED MODERATE ISOLATED
STRONG WITHIN 45 NM N AND 150 NM S OF AXIS BETWEEN 93W AND 103W.
SCATTERED MODERATE WITHIN 60 NM N OF AXIS BETWEEN 120W AND 123W
AND WITHIN 180 NM N OF AXIS BETWEEN 123W AND 128W.

$$
.FORECASTER SCHAUER. NATIONAL HURRICANE CENTER.