National Weather Service Weather Forecast Office

• Home
• Site Map
• News
• Organization
• Search for: NWS All NOAA 

000
FZPN01 KWBC 162146
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2230 UTC THU MAY 16 2013

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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

PACIFIC N OF 30N AND S OF 67N E OF A LINE FROM BERING STRAIT TO
50N 160E

SYNOPSIS VALID 1800 UTC MAY 16.
24 HOUR FORECAST VALID 1800 UTC MAY 17.
48 HOUR FORECAST VALID 1800 UTC MAY 18.

.WARNINGS.

...STORM WARNING...
.24 HOUR FORECAST LOW W OF AREA 40N157E 985 MB. FROM 30N TO 45N
W OF 170E WINDS 25 TO 40 KT. SEAS 8 TO 16 FT. ELSEWHERE FROM 30N
TO 52N W OF 180w WINDS TO 25 KT. SEAS TO 10 FT.
.48 HOUR FORECAST LOW 45N163E 971 MB. WITHIN 420 NM S SEMICIRCLE
WINDS 35 TO 50 KT. SEAS 15 TO 30 FT. ELSEWHERE FROM 34N TO 52N W
OF 177W WINDS 25 TO 35 KT. SEAS 11 TO 22 FT. ALSO FROM 30N TO
55N W OF 171W WINDS TO 25 KT. SEAS 8 TO 15 FT.

...GALE WARNING...
.LOW 56N152W 994 MB MOVING NE 10 KT. BETWEEN 180 NM AND 360 NM
NE QUADRANT WINDS 25 TO 35 KT. SEAS TO 11 FT. ELSEWHERE FROM 40N
TO 60N BETWEEN 136W AND 166W WINDS 20 TO 30 KT. SEAS TO 10 FT.
.24 HOUR FORECAST LOW 60N148W 992 MB. WITHIN 120 NM NE OF A LINE
FROM 55N138W TO 59N143W...AND WITHIN 660 NM SW QUADRANT WINDS 25
TO 35 KT. SEAS 8 TO 14 FT. ELSEWHERE FROM 40N TO 60N BETWEEN
130W AND 163W WINDS TO 25 KT. SEAS TO 8 FT.
.48 HOUR FORECAST LOW 59N147W 999 MB. WITHIN 540 NM S AND 360 NM
SW QUADRANTS WINDS 25 TO 40 KT. SEAS 8 TO 16 FT. ELSEWHERE
WITHIN 780 NM SE AND 600 NM SW QUADRANTS WINDS TO 25 KT. SEAS TO
8 FT.

.SYNOPSIS AND FORECAST.

.FROM 30N TO 37N BETWEEN 117W AND 125W NW WINDS TO 25 KT. SEAS
TO 11 FT.
.24 HOUR FORECAST FROM 30N TO 38N BETWEEN 117W AND 124W NW WINDS
TO 25 KT. SEAS TO 9 FT.
.48 HOUR FORECAST FROM 30N TO 40N BETWEEN 117W AND 125W NW WINDS
TO 25 KT. SEAS TO 10 FT.

.FROM 30N TO 35N W OF 177E E TO NE WINDS 20 TO 30 KT. SEAS TO 8
FT.
.24 HOUR FORECAST CONDITIONS ABSORBED BY LOW 40N157E DESCRIBED
IN WARNINGS SECTION ABOVE.

.FROM 33N TO 40N BETWEEN 129W AND 140W WINDS TO 25 KT. SEAS TO 9
FT.
.24 HOUR FORECAST CONDITIONS DIMINISHED.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 40N TO 55N
BETWEEN 141W AND 153W.
.24 HOUR FORECAST DENSE FOG FROM 30N TO 51N W OF 168E.
.48 HOUR FORECAST DENSE FOG FROM 44N TO 52N W OF 170E AND FROM
30N TO 49N BETWEEN 180W AND 170E.

.HIGH 31N145W 1028 MB NEARLY STATIONARY.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST HIGH 35N136W 1028 MB.

.HIGH 40N169E 1026 MB MOVING NE 20 KT.
.24 HOUR FORECAST HIGH 42N179W 1030 MB.
.48 HOUR FORECAST HIGH 44N167W 1030 MB.

.HIGH 41N139W 1022 MB MOVING SE 20 KT.
.24 HOUR FORECAST HIGH DISSIPATED.

.24 HOUR FORECAST HIGH 58N178W 1020 MB.
.48 HOUR FORECAST HIGH 55N165W 1026 MB.

.FORECASTER HOLLEY. OCEAN PREDICTION CENTER.

NATIONAL HURRICANE CENTER MIAMI FL

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

SYNOPSIS VALID 1800 UTC THU MAY 16.
24 HOUR FORECAST VALID 1800 UTC FRI MAY 17.
48 HOUR FORECAST VALID 1800 UTC SAT MAY 18.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM ALVIN NEAR 9.5N 109.1W 1005 MB AT 2100 UTC MAY
16 MOVING WNW OR 285 DEG AT 10 KT. MAXIMUM SUSTAINED WINDS 40 KT
GUSTS 50 KT. TROPICAL STORM FORCE WINDS WITHIN 40 NM OF CENTER
EXCEPT 0 NM SW QUADRANT. SEAS 12 FT OR GREATER WITHIN 90 NM N
SEMICIRCLE AND 30 NM S SEMICIRCLE WITH SEAS TO 20 FT. ELSEWHERE
WITHIN 210 NM NE SEMICIRCLE AND 120 NM SW SEMICIRCLE WINDS 20 TO
33 KT. SEAS 8 TO 12 FT.
.24 HOUR FORECAST TROPICAL STORM ALVIN NEAR 10.8N 112.0W.
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. LITTLE CHANGE IN
RADIUS OF TROPICAL STORM FORCE WINDS AND SEAS 12 FT OR GREATER
WITH SEAS TO 21 FT. ELSEWHERE WITHIN 180 NM OF CENTER...EXCEPT
WITHIN 90 NM SW QUADRANT OF ALVIN WINDS 20 TO 33 KT. REMAINDER
OF AREA S OF 14N BETWEEN 107W AND 120W WINDS 20 KT OR LESS. SEAS
8 TO 10 FT IN PRIMARILY SW SWELL.
.48 HOUR FORECAST TROPICAL STORM ALVIN NEAR 12.0N 114.7W.
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE
WINDS WITHIN 40 NM N SEMICIRCLE...30 NM SE QUADRANT AND 0 NM SW
QUADRANT. SEAS 12 FT OR GREATER WITHIN 120 NM OF CENTER...
EXCEPT WITHIN 60 NM SW QUADRANT OF ALVIN WITH SEAS TO 20 FT.
ELSEWHERE WITHIN 210 NM OF CENTER...EXCEPT 90 NM SW QUADRANT OF
ALVIN WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. REMAINDER OF AREA S OF
16N BETWEEN 107W AND 120W.
.72 HOUR FORECAST TROPICAL DEPRESSION ALVIN NEAR 13.0N 117.5W.
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST POST-TROPICAL REMNANT LOW ALVIN NEAR 13.0N
120.0W. MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT.
.120 HOUR FORECAST POST-TROPICAL REMNANT LOW ALVIN NEAR 13.0N
122.5W. MAXIMUM SUSTAINED WINDS 20 KT GUSTS 30 KT.

FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE
USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE
AND INTENSITY

.SYNOPSIS AND FORECAST

.12 HOUR FORECAST FROM 16N TO 19N W OF 136W WINDS 20 KT OR LESS.
SEAS TO 9 FT IN SW SWELL.
.24 HOUR FORECAST FROM 13N TO 19N W OF 136W WINDS 20 KT OR LESS.
SEAS TO 9 FT IN SW SWELL.
.48 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

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

CONVECTION VALID 2100 UTC THU MAY 16...
.TROPICAL STORM ALVIN...NUMEROUS MODERATE SCATTERED STRONG
WITHIN 150 NM W SEMICIRCLE. SCATTERED MODERATE WITHIN 120 NM E
SEMICIRCLE.

.LOW PRES NEAR 07N79W...SCATTERED MODERATE ISOLATED STRONG
WITHIN 240 NM W SEMICIRCLE OF LOW.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH AXIS FROM LOW PRES NEAR 07N79W 1011 MB TO 09N87W
TO 06N97W TO 09N104W THEN RESUMES FROM 09N110W TO 05N134W. ITCZ
AXIS FROM 05N134W TO 04N140W. SCATTERED MODERATE TO STRONG
WITHIN 180 NM EITHER SIDE OF MONSOON TROUGH BETWEEN 110W AND
120W. SIMILAR CONVECTION IS WITHIN 75-120 NM EITHER SIDE OF
MONSOON TROUGH BETWEEN 121W AND 131W.

$$
.FORECASTER LEWITSKY. NATIONAL HURRICANE CENTER.