TCMCP2
POTENTIAL TROPICAL CYCLONE ONE-C FORECAST/ADVISORY NUMBER 4
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI CP012026
ISSUED BY NWS NATIONAL HURRICANE CENTER MIAMI FL
0900 UTC THU AUG 13 2026
POTENTIAL TROP CYCLONE CENTER LOCATED NEAR 14.8N 144.5W AT 13/0900Z
POSITION ACCURATE WITHIN 40 NM
PRESENT MOVEMENT TOWARD THE WEST OR 275 DEGREES AT 9 KT
ESTIMATED MINIMUM CENTRAL PRESSURE 1002 MB
MAX SUSTAINED WINDS 35 KT WITH GUSTS TO 45 KT.
34 KT.......240NE 0SE 0SW 0NW.
4 M SEAS....240NE 180SE 90SW 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 14.8N 144.5W AT 13/0900Z
AT 13/0600Z CENTER WAS LOCATED NEAR 14.7N 144.1W
FORECAST VALID 13/1800Z 15.5N 145.7W...POTENTIAL TROP CYCLONE
MAX WIND 35 KT...GUSTS 45 KT.
34 KT...200NE 0SE 0SW 90NW.
FORECAST VALID 14/0600Z 16.5N 147.9W...TROPICAL CYCLONE
MAX WIND 40 KT...GUSTS 50 KT.
34 KT...150NE 60SE 0SW 90NW.
FORECAST VALID 14/1800Z 17.3N 150.4W
MAX WIND 45 KT...GUSTS 55 KT.
34 KT...120NE 60SE 30SW 90NW.
FORECAST VALID 15/0600Z 18.0N 153.0W
MAX WIND 50 KT...GUSTS 60 KT.
50 KT... 40NE 10SE 0SW 20NW.
34 KT...120NE 70SE 40SW 100NW.
FORECAST VALID 15/1800Z 18.7N 155.4W
MAX WIND 55 KT...GUSTS 65 KT.
50 KT... 40NE 20SE 0SW 40NW.
34 KT...130NE 70SE 50SW 100NW.
FORECAST VALID 16/0600Z 19.6N 158.0W
MAX WIND 60 KT...GUSTS 75 KT.
50 KT... 50NE 20SE 0SW 40NW.
34 KT...130NE 80SE 50SW 110NW.
EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM
ON DAY 4 AND 200 NM ON DAY 5...AND FOR INTENSITY NEAR 20 KT EACH DAY
OUTLOOK VALID 17/0600Z 21.2N 163.6W
MAX WIND 55 KT...GUSTS 65 KT.
50 KT... 40NE 20SE 0SW 40NW.
34 KT...120NE 70SE 50SW 110NW.
OUTLOOK VALID 18/0600Z 22.8N 169.1W
MAX WIND 60 KT...GUSTS 75 KT.
50 KT... 40NE 20SE 0SW 40NW.
34 KT...120NE 70SE 50SW 110NW.
REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 14.8N 144.5W
NEXT ADVISORY AT 13/1500Z
$$
FORECASTER BEVEN
TCMEP3
TROPICAL STORM HERNAN FORECAST/ADVISORY NUMBER 2
NWS NATIONAL HURRICANE CENTER MIAMI FL EP082026
0900 UTC THU AUG 13 2026
TROPICAL STORM CENTER LOCATED NEAR 18.1N 131.9W AT 13/0900Z
POSITION ACCURATE WITHIN 30 NM
PRESENT MOVEMENT TOWARD THE WEST OR 270 DEGREES AT 2 KT
ESTIMATED MINIMUM CENTRAL PRESSURE 1006 MB
MAX SUSTAINED WINDS 35 KT WITH GUSTS TO 45 KT.
34 KT....... 0NE 0SE 30SW 35NW.
4 M SEAS.... 0NE 0SE 60SW 60NW.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.
REPEAT...CENTER LOCATED NEAR 18.1N 131.9W AT 13/0900Z
AT 13/0600Z CENTER WAS LOCATED NEAR 18.1N 131.8W
FORECAST VALID 13/1800Z 18.0N 132.0W
MAX WIND 35 KT...GUSTS 45 KT.
34 KT... 0NE 0SE 20SW 30NW.
FORECAST VALID 14/0600Z 17.3N 132.4W
MAX WIND 35 KT...GUSTS 45 KT.
34 KT... 0NE 0SE 10SW 20NW.
FORECAST VALID 14/1800Z 16.5N 132.9W
MAX WIND 30 KT...GUSTS 40 KT.
FORECAST VALID 15/0600Z 15.8N 133.7W...POST-TROP/REMNT LOW
MAX WIND 25 KT...GUSTS 35 KT.
FORECAST VALID 15/1800Z 15.3N 135.3W...POST-TROP/REMNT LOW
MAX WIND 25 KT...GUSTS 35 KT.
FORECAST VALID 16/0600Z 14.9N 136.8W...POST-TROP/REMNT LOW
MAX WIND 20 KT...GUSTS 30 KT.
EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 100 NM
ON DAY 4 AND 125 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY
OUTLOOK VALID 17/0600Z...DISSIPATED
REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 18.1N 131.9W
NEXT ADVISORY AT 13/1500Z
$$
FORECASTER KATZ/BEVEN=
HSFEPI
HIGH SEAS FORECAST FOR METAREA XII
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1145 UTC THU AUG 13 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 AUG 13.
24 HOUR FORECAST VALID 0600 UTC AUG 14.
48 HOUR FORECAST VALID 0600 UTC AUG 15.
.WARNINGS.
...GALE WARNING...
.LOW W OF AREA NEAR 37N173E 1000 MB MOVING NE 20 KT. FROM 30N TO
40N W OF 178W WINDS 20 TO 30 KT. SEAS LESS THAN 2.5 M.
.24 HOUR FORECAST LOW W OF AREA NEAR 40N179E 997 MB. FROM 30N TO
43N W OF 172W WINDS 25 TO 35 KT. SEAS TO 3 M.
.48 HOUR FORECAST LOW 49N168W 994 MB. W OF A LINE FROM 30N176W TO
43N160W TO 51N160W WINDS 25 TO 35 KT. SEAS 2.5 TO 4.5 M.
.SYNOPSIS AND FORECAST.
.FROM 35N TO 54N BETWEEN 124W AND 134W WINDS 20 TO 30 KT. SEAS TO
2.5 M.
.24 HOUR FORECAST FROM 36N TO 55N BETWEEN 123W AND 137W WINDS TO
25 KT. SEAS TO 2.5 M.
.48 HOUR FORECAST CONDITIONS DIMINISHED.
.LOW 46N157W 1004 MB MOVING N 20 KT. FROM 40N TO 61N BETWEEN 163W
AND 150W WINDS 20 TO 30 KT. SEAS TO 3 M.
.24 HOUR FORECAST LOW 53N159W 1007 MB. WITHIN 300 NM N SEMICIRCLE
WINDS TO 25 KT. SEAS TO 2.5 M.
.48 HOUR FORECAST LOW DISSIPATED. ASSOCIATED CONDITIONS
DIMINISHED.
.LOW 57N177W 1000 MB MOVING S 10 KT. FROM 50N TO 63N W OF 170W
WINDS TO 25 KT. SEAS TO 2.5 M.
.24 HOUR FORECAST LOW 54N177W 1003 MB. WITHIN 240 NM SW...AND 360
NM NW QUADRANTS WINDS TO 25 KT. SEAS LESS THAN 2.5 M.
.48 HOUR FORECAST LOW 52N178W 1004 MB. ASSOCIATED CONDITIONS
DIMINISHED.
.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 44N TO 59N
BETWEEN 137W AND 172W.
.24 HOUR FORECAST DENSE FOG WITHIN 420 NM E OF A LINE FROM
42N147W TO 58N164W.
.48 HOUR FORECAST DENSE FOG FROM 53N TO 60N BETWEEN 140W AND
155W...AND N OF 58N WITHIN 300 NM W OF ALASKA.
.FORECASTER BYRD. OCEAN PREDICTION CENTER.
NWS 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 THU AUG 13.
24 HOUR FORECAST VALID 0600 UTC FRI AUG 14.
48 HOUR FORECAST VALID 0600 UTC SAT AUG 15.
.WARNINGS.
...TROPICAL STORM WARNING...
.TROPICAL STORM HERNAN NEAR 18.1N 131.9W 1006 MB AT 0900 UTC AUG
13 MOVING W OR 270 DEG AT 2 KT. MAXIMUM SUSTAINED WINDS 35 KT
GUSTS 45 KT. TROPICAL STORM FORCE WINDS WITHIN 0 NM E
SEMICIRCLE...30 NM SW QUADRANT AND 35 NM NW QUADRANT. SEAS TO 4
M OR GREATER WITHIN 0 NM E SEMICIRCLE AND 60 NM W SEMICIRCLE.
ELSEWHERE WITHIN 20N130W TO 21N132W TO 20N134W TO 18N135W TO
17N132W TO
17N131W TO 20N130W WINDS 20 TO 33 KT. SEAS 2.5 TO 4.0 M.
.24 HOUR FORECAST TROPICAL STORM HERNAN NEAR 17.3N 132.4W.
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE
WINDS WITHIN 0 NM E SEMICIRCLE...10 NM SW QUADRANT AND 20 NM NW
QUADRANT. SEAS TO 4 M OR GREATER WITHIN 60 NM W QUADRANT.
ELSEWHERE WITHIN 19N132W TO 19N133W TO 17N134W TO 17N133W TO
18N132W TO 19N132W WINDS 20 TO 33 KT. SEAS 3.0 TO 4.0 M.
REMAINDER
OF AREA WITHIN 22N131W TO 21N137W TO 18N137W TO 16N133W TO
19N131W TO 19N129W TO 22N131W WINDS 20 KT OR LESS. SEAS 2.5 TO
3.0 M IN MIXED SWELL.
.36 HOUR FORECAST TROPICAL DEPRESSION HERNAN NEAR 16.5N 132.9W.
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.
.48 HOUR FORECAST POST-TROPICAL REMNANT LOW HERNAN NEAR 15.8N
133.7W. MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT. ELSEWHERE
WITHIN 21N132W TO 21N133W TO 20N135W TO 19N136W TO 18N134W TO
19N133W TO 21N132W
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.
.WITHIN 18N136W TO 22N140W TO 08N140W TO 11N137W TO 14N136W TO
18N136W E TO SE WINDS 20 TO 30 KT. SEAS 2.5 TO 4.5 M IN S TO SW
SWELL.
.24 HOUR FORECAST WITHIN 24N137W TO 27N140W TO 13N140W TO
21N137W TO 24N137W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN SE
TO S SWELL.
.48 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.WITHIN 11N86W TO 12N88W TO 11N90W TO 10N91W TO 10N90W TO 10N87W
TO 11N86W...INCLUDING THE GULF OF PAPAGAYO... E WINDS 20 TO 25
KT. SEAS LESS THAN 2.5 M.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST LITTLE CHANGE.
.WITHIN 02N106W TO 04N112W TO 00N124W TO 03.4S120W TO 03.4S100W
TO 02N106W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN S TO SW
SWELL.
.24 HOUR FORECAST WITHIN 03N96W TO 06N105W TO 06N112W TO 00N128W
TO 03.4S120W TO 03S95W TO 03N96W WINDS 20 KT OR LESS. SEAS 2.5
TO 3.0 M IN S TO SW SWELL.
.48 HOUR FORECAST WITHIN 02N102W TO 02N107W TO 01S120W TO
03.4S120W TO 03.4S100W TO 02N102W WINDS 20 KT OR LESS. SEAS 2.5
TO 3.0 M IN S TO SW SWELL.
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.
CONVECTION VALID AT 0900 UTC THU AUG 13...
.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 09N78W TO 07N95W TO 08N110W. ITCZ FROM
08N110W TO 09N120W. SCATTERED MODERATE TO ISOLATED STRONG
FROM 05N TO 13N BETWEEN 85W AND 105W.
.FORECASTER CHRISTENSEN. NATIONAL HURRICANE CENTER.
NATIONAL WEATHER SERVICE HONOLULU HI
NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 180W
SYNOPSIS VALID 0600 UTC AUG 13 2026.
24 HOUR FORECAST VALID 0600 UTC AUG 14 2026.
48 HOUR FORECAST VALID 0600 UTC AUG 15 2026.
.WARNINGS.
...TROPICAL STORM WARNING...
.POTENTIAL TROPICAL CYCLONE ONE-C NEAR 14.8N 144.5W 1002 MB AT
0900 UTC AUG 13 MOVING W OR 275 DEG AT 9 KT. MAXIMUM SUSTAINED
WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE WINDS WITHIN 0 NM
OF CENTER EXCEPT 240 NM NE QUADRANT. WINDS 20 TO 33 KT ELSEWHERE
BOUNDED BY AREA 21N140W 10N140W 21N150W 21N140W. SEAS 4 M OR
GREATER WITHIN 180 NM NW AND SE QUADRANTS...240 NM NE QUADRANT
AND 90 NM SW QUADRANT WITH SEAS TO 4.5 M. SCATTERED MODERATE TO
STRONG TSTMS WITHIN 210 NM E AND S QUADRANTS OF CENTER. ISOLATED
MODERATE TSTMS WITHIN 270 NM OF CENTER.
.24 HOUR FORECAST TROPICAL STORM ONE-C TROPICAL CYCLONE NEAR
16.5N 147.9W. MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT.
TROPICAL STORM FORCE WINDS WITHIN 150 NM NE QUADRANT...60 NM SE
QUADRANT...0 NM SW QUADRANT...AND 90 NM NW QUADRANT. WINDS
ELSEWHERE 20 TO 33 KT FROM 22N TO 15N BETWEEN 144W AND 152W.
SEAS 4 M OR GREATER WITHIN 240 NM NW AND SE QUADRANTS...270
NM NE QUADRANT AND 90 NM SW QUADRANT WITH SEAS TO 5.5 M.
.48 HOUR FORECAST TROPICAL STORM ONE-C NEAR 18.0N 153.0W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE
WINDS WITHIN 120 NM NE QUADRANT...70 NM SE QUADRANT...40 NM SW
QUADRANT...AND 100 NM NW QUADRANT. WINDS 20 TO 33 KT ELSEWHERE
FROM 22N TO 16N BETWEEN 149W AND 155W. SEAS 4 M OR GREATER WITHIN
300 NM NW AND NE QUADRANTS...90 NM SE QUADRANT AND 210 NM SW
QUADRANT WITH SEAS TO 6 M.
FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE
USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE
AND INTENSITY.
SEE THE LATEST BULLETIN ISSUED BY NHC UNDER WMO HEADER WTPA22
PHFO.
.SYNOPSIS AND FORECAST
.WINDS 20 KT OR LESS OVER THE REMAINDER OF FORECAST AREA.
.SEAS 2.5 M OR LOWER OVER THE REMAINDER OF FORECAST AREA.
.MONSOON TROUGH 11N140W 06N153W 07N177W 08N180W. SCATTERED
MODERATE TSTMS WITHIN 210 NM OF TROUGH...AND 180 NM N OF TROUGH.
.ISOLATED MODERATE TSTMS FROM 12N TO 07N BETWEEN 154W AND 165W.
$$
.FORECASTER THOMAS. HONOLULU HI.=