GHEST 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 19.
24 HOUR FORECAST VALID 1200 UTC AUG 20.
48 HOUR FORECAST VALID 1200 UTC AUG 21.
.WARNINGS.
…HURRICANE WARNING…
.HURRICANE ERNESTO NEAR 41.8N 58.5W 968 MB AT 1500 UTC AUG 19
MOVING NE OR 040 DEG AT 40 KT. MAXIMUM SUSTAINED WINDS 80 KT
GUSTS 100 KT. TROPICAL STORM FORCE WINDS WITHIN 160 NM NE
QUADRANT…190 NM SE QUADRANT…110 NM SW QUADRANT…AND 100 NM
NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 260 NM NE…270 NM
SE…
240 NM SW AND 200 NM NW QUADRANTS WIH SEAS ST 36 FT. ELSEWHERE S
OF
45N BETWEEN 51W AND 68W WINDS 20 TO 33 KT. SEAS TO 12 FT.
.24 HOUR FORECAST POST-TROPICAL ERNESTO NEAR 47.7N 46.7.
MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE
WINDS WITHIN 130 NM NE QUADRANT…180 NM SE QUADRANT…150 NM SW
QUADRANT…AND 70 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN
60
NM NE…300 NM SE…360 NM SW…AND 300 NM NW QUADRANTS WITH
SEAS
TO 39 FT. ELSEWHERE FROM 38N TO 50N BETWEEN 41W AND 58W WINDS 20
TO 33 KT. SEAS TO 12 FT.
.36 HOUR FORECAST POST-TROPICAL CYCLONE ERNESTO NEAR 49.9N
36.2W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT.
.48 HOUR FORECAST POST-TROPICAL CYCLONE ERNESTO NEAR 52.2N
24.4W.
MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. TROPICAL STORM FORCE
WINDS WITHIN 170 NM S SEMICIRCLE…90 NM NE QUADRANT AND 0 NM NW
QUADRANT. SEAS 12 FT OR GREATERWITHIN 60 NM NE…120 NM SE…600
NM
SW…AND 480 NM NW QUADRANTS WITH SEAS TO 20 FT. ELSEWHERE FROM
41N TO 53N E OF 42W WINDS 20 TO 33 KT. SEAS TO 12 FT.
…GALE WARNING…
.LOW 61N43W 1001 MB DRIFTING E 05 KT. WITHIN 240 NM SW
SEMICIRCLE…AND FROM 51N TO 59N E OF 43W WINDS 20 TO 30 KT.
SEAS
8 TO 14 FT.
.12 HOUR FORECAST LOW 61N42W 997 MB. WITHIN 240 NM SE QUADRANT
WINDS 25 TO 35 KT. SEAS 8 TO 13 FT.
.24 HOUR FORECAST LOW 61N39W 992 MB. CONDITIONS DESCRIBED WITH
LOW 58N44W BELOW.
…GALE WARNING…
.INLAND LOW 55N63W 1001 MB MOVING E 25 KT. WITHIN 420 NM E
SEMICIRCLE…INCLUDING THE GULF OF SAINT LAWRENCE…WINDS 20 TO
30 KT. SEAS TO 8 FT.
.24 HOUR FORECAST LOW 58N44W 993 MB. WITHIN 480 NM SE SEMICIRCLE
AND 300 NM NW QUADRANT WINDS 20 TO 30 KT. SEAS TO 11 FT.
.36 HOUR FORECAST LOW E OF AREA 61N33W 985 MB. N OF 61N BETWEEN
38W AND 42W WINDS 25 TO 35 KT. SEAS 8 TO 13 FT.
.48 HOUR FO
