FZNT01 KWBC 201600
HSFAT1 1630
HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1630 UTC TUE AUG 20 2024
SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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
[email protected](LOWERCASE).
FOR INFORMATION ON ATLANTIC ICEBERGS SEE INFORMATION FROM NORTH
ATLANTIC ICE SERVICE AT HTTPS://OCEAN.WEATHER.GOV/ATL_TAB.PHP
(ALL LOWERCASE).
FOR ANY TROPICAL CYCLONE INFORMATION BEYOND 48 HOURS REFERENCE
THE ASSOCIATED NWS TROPICAL CYCLONE FORECAST/ADVISORY (TCM).
SECURITE
NORTH ATLANTIC NORTH OF 31N TO 67N AND WEST OF 35W
ALL FORECASTS VALID OVER ICE FREE FORECAST WATERS
SYNOPSIS VALID 1200 UTC AUG 20.
24 HOUR FORECAST VALID 1200 UTC AUG 21.
48 HOUR FORECAST VALID 1200 UTC AUG 22.
.WARNINGS.
…STORM WARNING…
.POST-TROPICAL CYCLONE ERNESTO NEAR 49.0N 44.7W 987 MB AT 1500
UTC AUG 20 MOVING NE OR 055 DEG AT 32 KT. MAXIMUM SUSTAINED
WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE WINDS WITHIN 120
NM NE QUADRANT…200 NM SE QUADRANT…150 NM SW QUADRANT…AND 0
NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 420 NM S
SEMICIRCLE…120 NM NE QUADRANT AND 180 NM NW QUADRANT WITH SEAS
TO 35 FT. ELSEWHERE FROM 40N TO 50N BETWEEN 37W AND 55W WINDS 20
TO 33 KT. SEAS 8 TO 18 FT.
.12 HOUR FORECAST POST-TROPICAL CYCLONE ERNESTO NEAR 50.5N
36.0W. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT.
.24 HOUR FORECAST POST-TROPICAL CYCLONE ERNESTO NEAR 52.8N
23.3W. MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. TROPICAL STORM
FORCE WINDS WITHIN 0 NM N SEMICIRCLE…240 NM SE QUADRANT AND
160 NM SW QUADRANT. SEAS 12 FT OR GREATER WITHIN 780 NM SW
QUADRANT WITH SEAS TO 18 FT E OF AREA. ELSEWHERE WITHIN 780 NM SW
QUADRANT WINDS 20 TO 33 KT. SEAS 8 TO 16 FT.
.36 HOUR FORECAST POST-TROPICAL CYCLONE ERNESTO DISSIPATED WELL E
OF AREA.
…GALE WARNING…
.COMPLEX LOW WITH FIRST CENTER 59N35W 991 MB MOVING E 15 KT AND
SECOND CENTER 62N37W 991 MB MOVING E 05 KT. WITHIN 300 NM N AND
180 NM W QUADRANTS OF SECOND CENTER AND FROM 50N TO 60N E OF 42W
WINDS 25 TO 35 KT. SEAS TO 11 FT.
.24 HOUR FORECAST LOW E OF AREA 61N23W 973 MB WITH SECOND CENTER
DISSIPATED. N OF 53N E OF 40W WINDS TO 25 KT. SEAS 8 TO 16 FT IN
MIXED WELL ASSOCIATED WITH POST-TROPICAL CYCLONE ERNESTO.
.48 HOUR FORECAST LOW AND CONDITIONS WELL E OF AREA.
…GALE WARNING…
.LOW 61N45W 995 MB MOVING N 05 KT. FROM 56N TO 62N BETWEEN 40W
AND 51W WINDS 25 TO 35 KT. SEAS TO 10 FT.
.24 HOUR FORECAST LOW DISSIPATED. N OF 59N BETWEEN 51W AND 59W N
WINDS 20 TO 30 KT. SEAS TO 8 FT.
.48 HOUR FORECAST E OF A LINE FROM 62N54W TO 53N47W TO
50N35W…NOT INCLUDING THE WATERS E OF GREENLAND…WINDS 20 TO 30
KT. SEAS TO 12 FT.
…GALE WARNING…
.LOW 62N56W 1001 MB MOVING SE 05 KT. N OF 64N W OF 58W WINDS 25
TO 35 KT. SEAS TO 9 FT. ELSEWHERE WITHIN 240 NM S AND 480 NM W
WINDS 20 TO 30 KT. SEAS TO 8 FT.
.24 HOUR FORECAST LOW DISSIPATED. CONDITIONS DESCRIBED IN SECOND
GALE WARNING.
.SYNOPSIS AND FORECAST.
.LOW 47N66W 1001 MB MOVING NE 30 KT. WITHIN WITHIN 300 NM E AND
780 NM S QUADRANTS AND 150 NM N OF FRONT FROM LOW CENTER TO
52N50W WINDS 20 TO 30 KT. SEAS TO 10 FT.
.24 HOUR FORECAST LOW
