TCMEP4
TROPICAL STORM NORBERT FORECAST/ADVISORY NUMBER 12
NWS NATIONAL HURRICANE CENTER MIAMI FL EP142026
1500 UTC SAT SEP 12 2026
TROPICAL STORM CENTER LOCATED NEAR 17.3N 128.3W AT 12/1500Z
POSITION ACCURATE WITHIN 30 NM
PRESENT MOVEMENT TOWARD THE WEST-NORTHWEST OR 285 DEGREES AT 9 KT
ESTIMATED MINIMUM CENTRAL PRESSURE 999 MB
MAX SUSTAINED WINDS 50 KT WITH GUSTS TO 60 KT.
50 KT....... 0NE 0SE 0SW 20NW.
34 KT....... 80NE 25SE 25SW 90NW.
4 M SEAS....150NE 30SE 90SW 150NW.
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 17.3N 128.3W AT 12/1500Z
AT 12/1200Z CENTER WAS LOCATED NEAR 17.2N 127.8W
FORECAST VALID 13/0000Z 17.7N 129.7W
MAX WIND 55 KT...GUSTS 65 KT.
50 KT... 20NE 0SE 0SW 20NW.
34 KT... 90NE 30SE 30SW 90NW.
FORECAST VALID 13/1200Z 18.1N 131.6W
MAX WIND 55 KT...GUSTS 65 KT.
50 KT... 30NE 0SE 0SW 20NW.
34 KT... 90NE 40SE 40SW 90NW.
FORECAST VALID 14/0000Z 18.4N 133.7W
MAX WIND 50 KT...GUSTS 60 KT.
50 KT... 20NE 0SE 0SW 10NW.
34 KT... 80NE 40SE 30SW 50NW.
FORECAST VALID 14/1200Z 18.6N 136.0W
MAX WIND 45 KT...GUSTS 55 KT.
34 KT... 80NE 40SE 30SW 50NW.
FORECAST VALID 15/0000Z 18.7N 138.5W
MAX WIND 40 KT...GUSTS 50 KT.
34 KT... 60NE 30SE 30SW 40NW.
FORECAST VALID 15/1200Z 18.6N 141.1W
MAX WIND 35 KT...GUSTS 45 KT.
34 KT... 60NE 30SE 30SW 40NW.
EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 100 NM
ON DAY 4 AND 125 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY
OUTLOOK VALID 16/1200Z 17.7N 146.3W...POST-TROP/REMNT LOW
MAX WIND 30 KT...GUSTS 40 KT.
OUTLOOK VALID 17/1200Z 15.9N 151.7W...POST-TROP/REMNT LOW
MAX WIND 25 KT...GUSTS 35 KT.
REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 17.3N 128.3W
NEXT ADVISORY AT 12/2100Z
$$
FORECASTER ROBERTS=
HSFEPI
HIGH SEAS FORECAST FOR METAREA XII
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1145 UTC SAT SEP 12 2026
CCODE/1:31:12:01:00/AOW+POR/NWS/CCODE
SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.
ONLY YOU KNOW THE WEATHER AT YOUR POSITION. REPORT IT TO THE
NATIONAL WEATHER SERVICE. EMAIL US AT
VOSOPS@NOAA.GOV(LOWERCASE).
FOR ANY TROPICAL CYCLONE INFORMATION BEYOND 48 HOURS REFERENCE
THE ASSOCIATED NWS TROPICAL CYCLONE FORECAST/ADVISORY (TCM).
SECURITE
PACIFIC S OF 67N AND N OF 30N E OF A LINE FROM THE BERING STRAIT
TO 53N172E TO 50N180W TO 30N180W
ALL FORECASTS VALID OVER ICE FREE FORECAST WATERS
SYNOPSIS VALID 0600 UTC SEP 12.
24 HOUR FORECAST VALID 0600 UTC SEP 13.
48 HOUR FORECAST VALID 0600 UTC SEP 14.
.WARNINGS.
...GALE WARNING...
.LOW 32N172W 1001 MB MOVING NW 15 KT WILL SLOW AND TURN SW AFTER
12 HOURS...AND THEN S AFTER 24 HOURS. WITHIN 240 NM E AND SE
QUADRANTS WINDS 25 TO 35 KT. SEAS 3 TO 5 M. ELSEWHERE FROM 30N
TO 39N W OF 165W WINDS TO 25 KT. SEAS TO 3.5 M.
.24 HOUR FORECAST LOW 34N178W 1000 MB. WITHIN 240 NM N AND NW
SEMICIRCLES WINDS 20 TO 30 KT. SEAS 3 TO 5 M. ELSEWHERE FROM 30N
TO 41W W OF 168W WINDS TO 25 KT. SEAS TO 3 M.
.48 HOUR FORECAST LOW 32N178W 1001 MB. FROM 30N TO 38N W OF 171W
WINDS 20 TO 30 KT. SEAS TO 3.5 M.
.SYNOPSIS AND FORECAST.
.LOW 32N149W 1012 MB DRIFTING SW. FROM 32N TO 41N BETWEEN 142W
AND 157W WINDS TO 25 KT. SEAS TO 3 M.
.24 HOUR FORECAST LOW MOVED S OF AREA. FROM 32N TO 42N BETWEEN
140W AND 157W WINDS TO 25 KT. SEAS TO 3 M.
.48 HOUR FORECAST LOW DISSIPATED S OF AREA. FROM 35N TO 42N
BETWEEN
139W AND 156W WINDS TO 25 KT. SEAS TO 2.5 M.
.LOW 44N130W 1010 MB MOVING SE 15 KT. WITHIN 540 NM W AND NW
QUADRANTS WINDS TO 25 KT. SEAS TO 2.5 M.
.24 HOUR FORECAST LOW 45N126W 1013 MB. WITHIN 420 NM SW QUADRANT
WINDS TO 25 KT. SEAS TO 2.5 M.
.48 HOUR FORECAST LOW DISSIPATED INLAND WITH CONDITIONS
DIMINISHED.
.N OF 60N W OF 161W OVER THE BERING SEA SW WINDS TO 25 KT. SEAS
TO 3.5 M.
.24 HOUR FORECAST CONDITIONS DIMINISHED.
.24 HOUR FORECAST FROM 31N TO 37N E OF 124W NW WINDS TO 25 KT.
SEAS TO 2.5 M.
.48 HOUR FORECAST FROM 30N TO 42N BETWEEN 116W AND 128W NW
WINDS 20 TO 30 KT. SEAS TO 3.5 M.
.48 HOUR FORECAST NEW COMPLEX LOW WITH ONE CENTER 56N172W 1008
MB...AND A SECOND CENTER 48N173W 1007 MB. FROM 43N TO 58N
BETWEEN 165W AND 174W WINDS 20 TO 30 KT. SEAS TO 3.5 M.
.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 44N TO 61N
BETWEEN 159W AND 179W.
.24 HOUR FORECAST DENSE FOG FROM 43N TO 58N W OF 155W.
.48 HOUR FORECAST DENSE FOG FROM 45N TO 54N BETWEEN 165W
AND 177W.
.FORECASTER MILLS. OCEAN PREDICTION CENTER.
NATIONAL HURRICANE CENTER MIAMI FL
E PACIFIC FROM THE EQUATOR TO 30N E OF 140W AND 03.4S TO THE
EQUATOR E OF 120W
SYNOPSIS VALID 0600 UTC SAT SEP 12.
24 HOUR FORECAST VALID 0600 UTC SUN SEP 13.
48 HOUR FORECAST VALID 0600 UTC MON SEP 14.
.WARNINGS.
...TROPICAL STORM WARNING...
.TROPICAL STORM NORBERT NEAR 17.1N 127.4W 999 MB AT 0900 UTC SEP
12 MOVING WNW OR 285 DEG AT 8 KT. MAXIMUM SUSTAINED WINDS 50 KT
GUSTS 60 KT. TROPICAL STORM FORCE WINDS WITHIN 20 NM S
SEMICIRCLE...50 NM NE QUADRANT AND 60 NM NW QUADRANT. SEAS 4 M
OR GREATER WITHIN 150 NM N SEMICIRCLE...60 NM SE QUADRANT AND 90
NM SW QUADRANT WITH SEAS TO 7.0 M. ELSEWHERE WITHIN 20N123W TO
23N126W TO 20N131W TO 18N131W TO 14N128W TO 17N123W TO 20N123W
WINDS 20 TO 33 KT. SEAS 2.5 TO 4.0 M.
.24 HOUR FORECAST TROPICAL STORM NORBERT NEAR 17.8N 130.6W.
MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE
WINDS WITHIN 90 NM NE QUADRANT...40 NM SE QUADRANT...30 NM SW
QUADRANT...AND 50 NM NW QUADRANT. SEAS 4 M OR GREATER WITHIN 150
NM NW AND 75 NM SE SEMICIRCLES WITH SEAS TO 7.5 M. ELSEWHERE
WITHIN 21N128W TO 23N131W TO 21N133W TO 17N133W TO 16N130W TO
18N128W TO 21N128W WINDS 20 TO 33 KT. SEAS 3.0 TO 4.0 M.
REMAINDER OF AREA WITHIN 21N126W TO 24N132W TO 22N135W TO
19N136W TO 15N133W TO 16N128W TO 21N126W WINDS 20 KT OR LESS.
SEAS 2.5 TO 3.0 M IN MIXED SWELL.
.48 HOUR FORECAST TROPICAL STORM NORBERT NEAR 18.4N 134.7W.
MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT. TROPICAL STORM FORCE
WINDS WITHIN 40 NM OF CENTER EXCEPT 70 NM NE QUADRANT. SEAS 4 M
OR GREATER WITHIN 150 NM NW AND 75 NM SE SEMICIRCLES WITH SEAS TO
7.0 M. ELSEWHERE WITHIN 23N132W TO 22N137W TO 18N137W TO
17N134W TO 20N131W TO 23N132W WINDS 20 TO 33 KT. SEAS 3.0 TO 4.0
M. REMAINDER OF AREA WITHIN 21N128W TO 26N133W TO 24N138W TO
21N139W TO17N138W TO 16N135W TO 21N128W WINDS 20 KT OR LESS.
SEAS TO 3.0 M IN MIXED SWELL.
FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE
USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE
AND INTENSITY.
...GALE WARNING...
.LOW PRESSURE NEAR 15N114W 1006 MB. WITHIN 16N111W TO 18N114W TO
16N115W TO 15N114W TO 13N114W TO 13N112W TO 16N111W SE WINDS 20
TO 30 KT. SEAS 2.5 TO 3.0 M IN SE SWELL.
.24 HOUR FORECAST LOW PRESSURE...POSSIBLE TROPICAL CYCLONE...NEAR
16N115W 1005 MB. WITHIN 18N112W TO 19N114W TO 19N116W TO 16N116W
TO 14N114W TO 15N112W TO 18N112W SE WINDS 20 TO 30 KT. SEAS 2.5
TO 3.0 M.
.42 HOUR FORECAST LOW PRESSURE...POSSIBLE TROPICAL CYCLONE...NEAR
15N117W 1004 MB. WITHIN 16N116W TO 16N117W TO 15N118W TO 15N117W
TO 15N116W TO 16N116W SE TO S WINDS 30 TO 40 KT. SEAS 3.0 TO 4.0
M. ELSEWHERE WITHIN 17N113W TO 19N115W TO 19N117W TO 18N118W TO
14N115W TO 15N113W TO 17N113W WINDS 20 KT OR LESS. SEAS 2.5 TO
3.0 M IN SE SWELL.
.48 HOUR FORECAST LITTLE CHANGE.
.SYNOPSIS AND FORECAST.
.WITHIN 02S104W TO 01N112W TO 01N117W TO 00N120W TO 03.4S120W TO
03.4S101W TO 02S104W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN
SE SWELL.
.24 HOUR FORECAST WITHIN 01S111W TO 02N119W TO 00N129W TO
03S120W TO 03.4S120W TO 03.4S94W TO 01S111W WINDS 20 KT OR LESS.
SEAS 2.5 TO 3.0 M IN S SWELL.
.48 HOUR FORECAST WITHIN 01S95W TO 00N103W TO 01N121W TO 00N130W
TO 03.4S120W TO 03.4S94W TO 01S95W WINDS 20 KT OR LESS. SEAS 2.5
TO 3.0 M IN S TO SW SWELL.
.WITHIN 11N87W TO 11N88W TO 11N89W TO 10N89W TO 10N88W TO 10N87W
TO 11N87W...INCLUDING THE GULF OF PAPAGAYO... WINDS 20 KT OR
LESS. SEAS 2.5 TO 3.0 M IN SE SWELL.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST WITHIN 30N119W TO 30N122W TO 29N122W TO
29N120W TO 30N119W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN N
SWELL.
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.
CONVECTION VALID AT 0900 UTC SAT SEP 12...
.T.S. NORBERT...NUMEROUS MODERATE TO STRONG FROM WITHIN 180 NM
NE AND 90 NM SW SEMICIRCLES.
.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 10N85W TO 07N95W TO 16N115W TO 15N120W, AND
FROM 13N125W TO 09N135W TO 14N140W. SCATTERED MODERATE FROM 10N
TO 13N BETWEEN 88W AND 91W...FROM 06N TO 11N BETWEEN 90W AND
100W...AND FROM 12N TO 15N BETWEEN 110W AND 117W.
$$
.FORECASTER CHRISTENSEN. NATIONAL HURRICANE CENTER.
NATIONAL WEATHER SERVICE HONOLULU HI
NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 180W
SYNOPSIS VALID 0600 UTC SEP 12 2026.
24 HOUR FORECAST VALID 0600 UTC SEP 13 2026.
48 HOUR FORECAST VALID 0600 UTC SEP 14 2026.
.WARNINGS.
.NONE.
.SYNOPSIS AND FORECAST.
.FRONT 30N171W 27N172W THENCE TROUGH 24N175W. FRONT MOVING E
SLOWLY
AND TROUGH NEARLY STATIONARY. WINDS 20 TO 25 KT WITHIN 180 NM E OF
FRONT.
.24 HOUR FORECAST FRONT 30N173W 27N173W THENCE TROUGH 23N177W.
WINDS EASED TO 20 KT OR LESS.
.48 HOUR FORECAST FRONT WEAKENING TO TROUGH 30N172W 23N177W.
.TROUGH 30N150W 27N152W NEARLY STATIONARY.
.24 HOUR FORECAST TROUGH 30N151W 26N154W.
.48 HOUR FORECAST TROUGH 30N152W 27N152W.
.TROUGH 30N141W 26N144W 23N147W NEARLY STATIONARY.
.24 HOUR FORECAST TROUGH 30N142W 27N144W 23N145W.
.48 HOUR FORECAST TROUGH 30N145W 26N147W 20N120W.
.TROUGH 20N163W 18N162W 16N163W MOVING W SLOWLY. ISOLATED MODERATE
TSTMS WITHIN 240 NM E OF TROUGH.
.24 HOUR FORECAST WEAK TROUGH 21N165W 17N165W.
.48 HOUR FORECAST TROUGH DISSIPATED.
.48 HOUR FORECAST NEW LOW 12N147W 1008 MB.
.48 HOUR FORECAST NEW FRONT 30N175W 27N180W.
.WINDS 20 KT OR LOWER REMAINDER OF FORECAST AREA.
.SEAS 2.5 TO 3 M N OF 28N W OF 167W.
.24 HOUR FORECAST SEAS LOWERED TO 2.5 M OR LESS.
.SEAS 2.5 M OR LESS REMAINDER OF FORECAST AREA.
.MONSOON TROUGH 14N140W 15N145W 10N155W 10N170W 07N180W. ISOLATED
MODERATE TO STRONG TSTMS BETWEEN TROUGH AND 03N...AND WITHIN 150
NM N OF TROUGH E OF 150W.
$$
.FORECASTER WROE. HONOLULU HI.=