Atlantic Text Briefing Package

[Printable Version]

AGNT40 KWNM 140140
MIMATN

Marine Weather Discussion for N Atlantic Ocean
NWS Ocean Prediction Center Washington DC
840 PM EST Wed Dec 13 2017

.FORECAST DISCUSSION...Major features/winds/seas/significant 
.weather for the North Atlantic Ocean W of 50W from 30N to 50N.

The latest observations correlate well with the current gridded
and worded forecasts. Highest winds were located over the Gulf of
Maine with a ship report of winds of 37kt. Farther south toward
the mid-Atlantic, and closer to the coast, sustained winds were
mainly under gales with gusts above gale force, in the mid-to-
upper 30s knots. The latest IR satellite images showed comma
cloudiness with a mid-level wave in the southern end of the mid-
level trough, from the center of the closed low over or just 
east of Maine, moving out of the northern offshore waters. IR 
clouds were showing, albeit briefly over most of the offshore 
waters, a more stable appearance coming off of the coast, in 
advance of the clipper system moving toward the mid-Atlantic.

While there were no surface observations to verify, 925mb winds
from the GFS and ECMWF suggested some small potential for storm-
force winds just east of the offshore zone ANZ905. These strong
winds move east early this evening, and as the first area of
gales remaining over the northern waters moves northeast, renewed
gales will occur over much of the mid-Atlantic waters associated
with the clipper system. The GFS, ECMWF, and UKMET are all in
basic agreement, and there is enough guidance, either near-
surface based or at 925mb, to continue with the mention of
storm-force winds in ANZ905 and ANZ910 on Thursday. These
conditions should end Thursday night as 925mb winds fall into the
teens to 20s knots, before yet another surface low moves across
the mid-Atlantic waters late Friday and Friday night with some
gales along and ahead of the low well east of the Carolina coast
Friday night, and then farther north especially off of the Jersey
coast in the cold-air advection Saturday and Saturday night. The
ECMWF, with the surface low deepening just a little faster than
the GFS and closer to the far eastern mid-Atlantic zones near the
Gulf Stream, would indicate conditions close to storm-force there
late Friday night and early Saturday. This will be something to
monitor for future forecast issuances.

In addition, there are concerns about gales building in from the
southwest beginning across the southern waters Monday. The GFS 
is weaker with any low pressure and more slack with the surface 
gradient over the offshore waters Monday, while the ECMWF is much
stronger with developing low pressure off the New England coast 
during the day Monday. The UKMET is in between, not nearly as 
deep as the ECMWF would suggest, but certainly deeper than the 
GFS and providing for a tightening surface gradient beginning 
over the southern waters on Monday. Will review later model 
trends for the potential for any gales then.

The latest, available observations noted seas were also in line
with the current gridded and worded forecasts. The lone exception
was well off the South Carolina coast toward the eastern edge of
the offshore waters. There, indications are the seas were a 
couple of feet higher than forecast, with forecast adjustments
made.

-----------------------------------------------------------------
PREVIOUS DISCUSSION...

The morning 1500Z ASCAT overpass indicated widespread gales
occurring over most of the offshore waters, except for the far
southern NT2 waters. These winds align well with the first sigma
layer winds from the 12Z GFS. Overall, the 12Z models are now in
very good agreement over the region tonight into early Sun. For
this time frame we will rely on the 12Z GFS winds and use the
smart tool which places the higher first sigma layer winds over 
the unstable areas and slightly lower 10 meter winds over the 
stable areas right into early Sun. We will make a few minor 
edits to the grids and forecast in deference to nearby coastal 
WFO and TAFB grids, and also to maintain most of the previous 
hazards for the afternoon package. 

Gales associated with the strong low pressure system moving N
from New Brunswick, Canada will diminish over the waters early 
tonight. A fast-moving clipper-type low pressure system 
currently over the midwest will pass E over southern NT1 waters,
or near 40N, Thursday morning. Gale to storm force winds are 
likely with this low pressure system as it crosses the waters 
later tonight into Thu. The next low pressure system will then 
impact the waters Fri into Sat with another period of gale force
winds likely especially from central NT2 waters N into southern 
NT1 waters. Any storm force winds with this system will likely 
occur well E of the waters Fri night. High pressure will then 
slowly build E toward the region Sat night with gales ending at 
that time. The high will then pass E over the waters Sun, moving
off to the E of the area Sun night. For Sun into early Mon we 
will rely on the previous set of grids which used a blend of the 
12Z ECMWF and 00Z ECMWF from yesterday. For most of Mon through
the end of the period we will trend the forecast toward the WPC 
medium range guidance, and adjust the forecast over the next few
days, as the 12Z guidance from today is in rather poor agreement
over the region early next week. We will boost these winds by
10-12 percent or so, as they typically run a little on the low
side especially near and S of the gulf stream.

Confidence in the forecast is above average tonight into the
weekend, and then below average by Sun night through Mon night 
with the 12Z models showing a wide variety of solutions over the
region at that time, and beyond.

.Seas...The latest observations over the offshore waters indicate
that the previous grids and forecast have initialized the best
over the waters, with the 12Z ECMWF WAM a little too high and the
12Z Wavewatch running a little too low over the waters. For the
afternoon package, we will rely on the previous grids and
forecast for tonight, transition to a 50-50 blend of these two
wave models Thu into early Sun, fall back to the previous grids
and forecast later Sun and Sun night to match the winds, and then
populate with the 12Z Wavewatch, but make several manual 
adjustments to fit the WPC wind grids as noted above by Mon and
Mon night over the region.

.EXTRATROPICAL STORM SURGE GUIDANCE...No significant issues with 
the latest surge guidance is noted at this time. 


.WARNINGS...Preliminary.

.NT1 New England Waters...
.ANZ800...Gulf of Maine...
     Gale tonight.
.ANZ805...Georges Bank west of 68W...
     Gale tonight into Thursday. 
     Gale Possible Saturday.
.ANZ900...Georges Bank east of 68W...
     Gale tonight.
.ANZ810...South of New England...
     Gale tonight into Thursday. 
     Gale Possible Saturday.
.ANZ815...South of Long Island...
     Gale tonight.
     Gale Possible Saturday.

.NT2 Mid-Atlantic Waters...
.ANZ820...Hudson Canyon to Baltimore Canyon...
     Gale tonight into Thursday. 
     Gale Possible Saturday into Saturday night. 
.ANZ915...Hudson Canyon to the Great South Channel...
     Gale tonight into Thursday. 
     Gale Possible Saturday into Saturday night. 
.ANZ920...Baltimore Canyon to the Great South Channel...
     Gale tonight into Thursday. 
     Gale Possible Saturday into Saturday night. 
.ANZ905...The Great South Channel to the Hague Line...
     Gale tonight.
     Storm Thursday.
     Gale Possible Saturday into Saturday night. 
.ANZ910...East of the Great South Channel and south of 39N...
     Gale tonight.
     Storm Thursday.
     Gale Possible Saturday into Saturday night. 
.ANZ825...Inner Waters from Baltimore Canyon to Cape Charles Light...
     Gale tonight into Thursday. 
.ANZ828...Inner Waters from Cape Charles Light to Currituck Beach Light...
     Gale tonight into Thursday. 
.ANZ925...Outer Waters from Baltimore Canyon to Hatteras Canyon...
     Gale tonight into Thursday. 
     Gale Possible Friday night.
.ANZ830...Inner Waters from Currituck Beach Light to Cape Hatteras...
     Gale tonight into Thursday. 
.ANZ833...Inner Waters from Cape Hatteras to Cape Fear...
     Gale tonight into Thursday. 
.ANZ930...Outer Waters from Hatteras Canyon to Cape Fear...
     Gale tonight into Thursday. 
     Gale Possible Friday night.

$$

.Forecaster Figurskey/Mills. Ocean Prediction Center.
Last Update:01:41Z, 14 December 2017
Updates: Four times per day

FZNT21 KWBC 140221
OFFNT1

Offshore Waters Forecast
NWS Ocean Prediction Center Washington DC
921 PM EST Wed Dec 13 2017

New England continental shelf and slope waters from 25 nm
offshore to the Hague Line, except to 1000 fm south of New
England.

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.

ANZ898-141500-
921 PM EST Wed Dec 13 2017

.SYNOPSIS FOR NEW ENGLAND WATERS...A strong low pressure system over
the Gulf of Saint Lawrence will move north away from the waters 
tonight. The next low pressure system will move east across the 
northern mid-Atlantic waters, or roughly along 40N, during 
Thursday. Yet another low pressure system will organize south of 
the waters Friday, and intensify as it moves off to the east of 
the area Friday night and Saturday. High pressure will slowly 
build east toward the waters Saturday night, move east over the 
region Sunday, and then move off to the east of the waters Sunday
night. A weak cold front will then move east into the waters 
Monday into Monday night. 

$$

ANZ800-141500-
Gulf of Maine to the Hague Line-
921 PM EST Wed Dec 13 2017

...GALE WARNING...

.TONIGHT...W winds 30 to 40 kt. Seas 11 to 18 ft. Chance of snow.
.THU...W winds 20 to 30 kt. Seas 7 to 12 ft. Chance of snow with
VSBY 1 nm or less. 
.THU NIGHT...W winds 20 to 30 kt. Seas 6 to 11 ft. Light
freezing spray. 
.FRI...W winds 15 to 25 kt. Seas 6 to 10 ft. Light freezing
spray early. 
.FRI NIGHT...W winds 15 to 20 kt. Seas subsiding to 3 to 6 ft.
.SAT...W to NW winds 15 to 25 kt. Seas becoming 5 to 8 ft.
.SAT NIGHT...NW winds 20 to 30 kt. Seas 6 to 10 ft. 
.SUN...NW winds diminishing to 10 to 20 kt, then becoming W 5 to
15 kt. Seas 5 to 9 ft, subsiding to 4 to 6 ft. 
.SUN NIGHT...W winds 5 to 15 kt, becoming S to SW 10 to 20 kt.
Seas 3 to 5 ft, subsiding to 2 to 3 ft. 
.MON...W winds 5 to 10 kt, becoming 5 to 15 kt. Seas 1 to 3 ft. 
.MON NIGHT...W winds 10 to 15 kt. Seas 2 to 4 ft. 

$$

ANZ805-141500-
Georges Bank between Cape Cod and 68W north of 1000 fm-
921 PM EST Wed Dec 13 2017

...GALE WARNING...

.TONIGHT...W winds 30 to 40 kt. Seas 11 to 19 ft. Chance of snow.
.THU...W winds 25 to 35 kt, becoming W to NW 20 to 30 kt. Seas
8 to 13 ft. Chance of rain and snow with VSBY 1 nm or less. 
.THU NIGHT...W to NW winds 15 to 25 kt. Seas 7 to 12 ft. 
.FRI...W winds 10 to 20 kt. Seas 6 to 10 ft, subsiding to 4 to 7
ft. 
.FRI NIGHT...W winds 15 to 25 kt. Seas 3 to 6 ft. 
.SAT...W winds 25 to 35 kt, becoming NW. Seas building to 8 to 
16 ft.
.SAT NIGHT...NW winds 20 to 30 kt. Seas 9 to 16 ft. 
.SUN...W to NW winds diminishing to 10 to 20 kt, then becoming W
10 to 15 kt. Seas subsiding to 5 to 9 ft, then to 3 to 6 ft. 
.SUN NIGHT...W winds 10 to 15 kt, becoming S to SW 10 to 20 kt.
Seas 3 to 5 ft, becoming 2 to 4 ft. 
.MON...SW winds 5 to 15 kt, becoming W 10 to 15 kt. Seas 2 to
4 ft. 
.MON NIGHT...W winds 10 to 15 kt. Seas 3 to 5 ft. 

$$

ANZ900-141500-
Georges Bank between 68W and the Hague Line-
921 PM EST Wed Dec 13 2017

...GALE WARNING...

.TONIGHT...W winds 30 to 40 kt. Seas 13 to 22 ft. Chance of rain
and snow.
.THU...W to NW winds 15 to 25 kt. Seas 9 to 15 ft. Rain.
.THU NIGHT...W winds 20 to 25 kt. Seas 8 to 13 ft. 
.FRI...W winds 15 to 25 kt. Seas 6 to 11 ft. 
.FRI NIGHT...W winds diminishing to 5 to 15 kt, then increasing 
to 20 to 30 kt. Seas subsiding to 4 to 7 ft. 
.SAT...W winds 20 to 30 kt, becoming NW. Seas building to 7 to 
14 ft.
.SAT NIGHT...NW winds 20 to 30 kt. Seas 9 to 15 ft. 
.SUN...NW winds 15 to 25 kt, becoming W 10 to 15 kt. Seas
subsiding to 7 to 12 ft, then to 4 to 8 ft. 
.SUN NIGHT...W winds 10 to 15 kt, becoming SW. Seas 3 to 6 ft. 
.MON...W winds 10 to 20 kt, becoming 10 to 15 kt. Seas 3 to
4 ft. 
.MON NIGHT...W winds 10 to 15 kt, increasing to 15 to 20 kt.
Seas 2 to 4 ft. 

$$

ANZ810-141500-
South of New England between the Great South Channel and Montauk
Point to 1000 fm-
921 PM EST Wed Dec 13 2017

...GALE WARNING...

.TONIGHT...W winds 20 to 30 kt. Seas 10 to 18 ft. Chance of 
snow. 
.THU...W to SW winds 30 to 40 kt, becoming W to NW 20 to 30 kt.
Seas 8 to 13 ft. Rain and snow showers with VSBY 1 nm or less.
.THU NIGHT...NW winds 15 to 25 kt. Seas 7 to 12 ft. 
.FRI...W to NW winds diminishing to 5 to 15 kt. Seas subsiding to
4 to 8 ft.
.FRI NIGHT...W winds 15 to 20 kt, increasing to 20 to 30 kt.
Seas 5 to 8 ft. 
.SAT...W to NW winds 30 to 40 kt. Seas building to 8 to 16 ft. 
.SAT NIGHT...NW winds 20 to 30 kt. Seas 9 to 16 ft. 
.SUN...NW winds diminishing to 5 to 15 kt, becoming W. Seas
subsiding to 5 to 8 ft, then to 3 to 6 ft.
.SUN NIGHT...S to SW winds 10 to 15 kt, becoming S 15 to 20 kt. 
Seas 3 to 6 ft. 
.MON...Winds diminishing to W to SW 10 to 15 kt. Seas 3 to 5 ft.
.MON NIGHT...W winds 10 to 15 kt. Seas 3 to 5 ft. 

$$

ANZ815-141500-
South of Long Island between Montauk Point and Sandy Hook to
1000 fm-
921 PM EST Wed Dec 13 2017

...GALE FORCE WINDS POSSIBLE SAT...

.TONIGHT...W to SW winds 20 to 30 kt. Seas 7 to 13 ft. Chance of
snow with VSBY 1 nm or less. 
.THU...W to SW winds 20 to 30 kt, becoming W to NW. Seas 7 to
12 ft. Scattered rain showers and chance of snow. 
.THU NIGHT...NW winds 15 to 25 kt. Seas 6 to 11 ft. 
.FRI...W winds diminishing to 5 to 10 kt, then increasing to 10 
to 15 kt. Seas subsiding to 3 to 6 ft. 
.FRI NIGHT...W winds 15 to 20 kt, increasing to 20 to 30 kt.
Seas 2 to 5 ft, building to 5 to 8 ft. 
.SAT...W to NW winds 30 to 40 kt. Seas building to 8 to 15 ft. 
.SAT NIGHT...NW winds 20 to 30 kt, diminishing to 10 to 20 kt.
Seas 8 to 13 ft, subsiding to 5 to 9 ft. 
.SUN...W to NW winds less than 10 kt, becoming SW. Seas subsiding
to 3 to 6 ft. 
.SUN NIGHT...S to SW winds increasing to 15 to 25 kt. Seas 3 to 
6 ft.
.MON...Winds diminishing to W 10 to 15 kt. Seas 3 to 5 ft.
.MON NIGHT...W winds 10 to 15 kt. Seas 2 to 4 ft. 

$$

.Forecaster Figurskey. Ocean Prediction Center.
Last Update:02:23Z, 14 December 2017
Updates: Four times per day

FZNT22 KWBC 140222
OFFNT2

Offshore Waters Forecast
NWS Ocean Prediction Center Washington DC
922 PM EST Wed Dec 13 2017

West central North Atlantic continental shelf and slope waters
beyond 20 nm to 250 nm offshore, including south of Georges Bank
from 1000 fm to 250 nm offshore.

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.

ANZ899-141445-
922 PM EST Wed Dec 13 2017

.SYNOPSIS FOR MID ATLC WATERS...A strong low pressure system over
the Gulf of Saint Lawrence will move north away from the waters 
tonight. The next low pressure system will move east across the 
northern mid-Atlantic waters later tonight into Thursday, 
followed by yet another low pressure system crossing the area 
Friday into Friday night. High pressure will build east toward 
the region Saturday, pass east over the waters Saturday night 
into Sunday, then shift east of the waters Sunday night ahead of 
a weak cold front. The weak front will move southeast into the 
waters Monday into Monday night. 

$$

ANZ820-141445-
Hudson Canyon to Baltimore Canyon to 1000 fm-
922 PM EST Wed Dec 13 2017

...GALE WARNING...

.TONIGHT...W winds 15 to 25 kt, becoming SW 25 to 35 kt. Seas
6 to 11 ft. Periods of rain and snow with VSBY 1 nm or less.
.THU...W to SW winds 25 to 35 kt, becoming W to NW 20 to 30 kt.
Seas 7 to 12 ft. 
.THU NIGHT...NW winds 15 to 25 kt. Seas 6 to 10 ft. 
.FRI...W to NW winds diminishing to 5 to 10 kt, then becoming W 
5 to 15 kt. Seas subsiding to 2 to 5 ft. 
.FRI NIGHT...W winds 10 to 20 kt, increasing to 20 to 30 kt.
Seas 2 to 3 ft, building to 5 to 8 ft. 
.SAT...W winds 25 to 35 kt. Seas building to 7 to 13 ft. 
.SAT NIGHT...NW winds 25 to 35 kt, diminishing to 10 to 20 kt.
Seas 7 to 12 ft, subsiding to 4 to 8 ft. 
.SUN...Variable winds less than 10 kt, becoming SW 10 to 20 kt.
Seas subsiding to 2 to 4 ft. 
.SUN NIGHT...S to SW winds 10 to 20 kt. Seas 3 to 6 ft. 
.MON...W winds 10 to 15 kt. Seas 3 to 5 ft. 
.MON NIGHT...W winds 10 to 15 kt. Seas 2 to 4 ft. 

$$

ANZ915-141445-
Between 1000 fm and 38.5N west of 69W-
922 PM EST Wed Dec 13 2017

...GALE WARNING...

.TONIGHT...W winds 25 to 30 kt, becoming W to SW 25 to 35 kt.
Seas 11 to 18 ft. Chance of rain.
.THU...W to SW winds 35 to 45 kt. Seas 10 to 17 ft. Scattered
showers. 
.THU NIGHT...W to NW winds 20 to 30 kt, becoming NW 10 to 20 kt.
Seas 9 to 15 ft. 
.FRI...W to NW winds 5 to 15 kt. Seas subsiding to 4 to 8 ft. 
.FRI NIGHT...W winds 10 to 20 kt, increasing to 20 to 30 kt.
Seas 3 to 6 ft, building to 5 to 9 ft. 
.SAT...W to NW winds 35 to 45 kt. Seas building to 9 to 18 ft. 
.SAT NIGHT...NW winds 30 to 40 kt, diminishing to 15 to 25 kt.
Seas 9 to 18 ft, subsiding to 6 to 11 ft. 
.SUN...NW winds 5 to 15 kt, becoming W. Seas subsiding to 4 to 7
ft.
.SUN NIGHT...S to SW winds 10 to 20 kt. Seas 3 to 6 ft. 
.MON and MON NIGHT...W winds 15 to 20 kt. Seas 3 to 6 ft. 

$$

ANZ920-141445-
Baltimore Canyon to 69W east of 1000 fm and south of 38.5N to
250 nm offshore-
922 PM EST Wed Dec 13 2017

...GALE WARNING...

.TONIGHT...W winds 20 to 30 kt, becoming SW 25 to 35 kt. Seas
10 to 17 ft. 
.THU...W to SW winds 35 to 45 kt. Seas 11 to 19 ft. Scattered
showers and TSTMs.
.THU NIGHT...W to NW winds 20 to 30 kt, becoming NW 10 to 20 kt.
Seas 10 to 17 ft. 
.FRI...W to NW winds 5 to 15 kt. Seas subsiding to 5 to 9 ft. 
.FRI NIGHT...W to NW winds increasing to 20 to 30 kt. Seas
building to 7 to 13 ft.
.SAT...W winds 30 to 40 kt, becoming NW 35 to 45 kt. Seas
building to 10 to 18 ft. 
.SAT NIGHT...NW winds 30 to 40 kt, diminishing to 20 to 30 kt.
Seas 10 to 18 ft, subsiding to 8 to 14 ft. 
.SUN...N to NW winds 10 to 20 kt, becoming W to SW 5 to 15 kt.
Seas 7 to 11 ft, subsiding to 6 to 9 ft. 
.SUN NIGHT...S to SW winds 10 to 20 kt, increasing to 20 to
30 kt. Seas 5 to 9 ft. 
.MON...W winds 15 to 25 kt. Seas 5 to 9 ft. 
.MON NIGHT...W winds 10 to 20 kt. Seas 5 to 8 ft. 

$$

ANZ905-141445-
East of 69W to the Hague Line between 1000 fm and 39N-
922 PM EST Wed Dec 13 2017

...STORM WARNING...

.TONIGHT...W winds 30 to 40 kt. Seas 15 to 25 ft. Scattered
showers. 
.THU...SW winds 35 to 45 kt, becoming W 40 to 50 kt. Seas 12 to
20 ft. Showers and TSTMs with VSBY 1 nm or less. 
.THU NIGHT...W to NW winds 20 to 30 kt. Seas 10 to 18 ft. 
.FRI...W winds diminishing to 10 to 20 kt. Seas subsiding to 7 
to 12 ft.
.FRI NIGHT...W winds 5 to 15 kt, becoming W to NW 20 to 30 kt.
Seas subsiding to 5 to 8 ft. 
.SAT...W to NW winds increasing to 30 to 40 kt. Seas building
to 9 to 17 ft.
.SAT NIGHT...NW winds 30 to 40 kt, diminishing to 20 to 30 kt.
Seas 10 to 19 ft. 
.SUN...NW winds 15 to 25 kt, becoming W 10 to 15 kt. Seas
subsiding to 7 to 13 ft. 
.SUN NIGHT...W winds 10 to 15 kt, becoming S to SW 10 to 20 kt.
Seas subsiding to 4 to 8 ft. 
.MON...W winds 10 to 20 kt. Seas 3 to 5 ft. 
.MON NIGHT...W winds 10 to 20 kt. Seas 3 to 6 ft. 

$$

ANZ910-141445-
East of 69W and south of 39N to 250 nm offshore-
922 PM EST Wed Dec 13 2017

...STORM WARNING...

.TONIGHT...W winds 25 to 35 kt, diminishing to 20 to 30 kt. Seas
13 to 23 ft. 
.THU...SW winds 40 to 50 kt, becoming W 35 to 50 kt. Seas 12 to
20 ft. Showers and TSTMs with VSBY 1 nm or less. 
.THU NIGHT...W winds 20 to 30 kt, becoming NW 15 to 25 kt. Seas
10 to 18 ft. 
.FRI...W to NW winds 10 to 20 kt, becoming W 5 to 15 kt. Seas
subsiding to 6 to 11 ft. 
.FRI NIGHT...W winds 10 to 20 kt, becoming NW 20 to 30 kt. Seas
5 to 8 ft, building to 7 to 12 ft. 
.SAT...W winds 35 to 45 kt. Seas building to 10 to 17 ft. 
.SAT NIGHT...NW winds 30 to 40 kt, diminishing to 20 to 30 kt.
Seas 12 to 19 ft, subsiding to 9 to 16 ft. 
.SUN...NW winds 15 to 25 kt, becoming W to NW 5 to 15 kt. Seas
8 to 13 ft, subsiding to 5 to 9 ft. 
.SUN NIGHT...W winds 5 to 15 kt, becoming S to SW 10 to 20 kt.
Seas becoming 4 to 7 ft. 
.MON...W winds 15 to 25 kt. Seas 4 to 7 ft. 
.MON NIGHT...W winds 15 to 20 kt. Seas 5 to 8 ft. 

$$

ANZ825-141445-
Baltimore Canyon to Cape Charles Light to 100 nm offshore-
922 PM EST Wed Dec 13 2017

...GALE WARNING...

.TONIGHT...SW winds 20 to 25 kt, increasing to 25 to 35 kt. Seas
6 to 10 ft. Chance of rain.
.THU...W winds 25 to 35 kt, becoming W to NW 20 to 30 kt. Seas
7 to 13 ft. 
.THU NIGHT...N to NW winds 15 to 25 kt, becoming N 10 to 15 kt.
Seas 5 to 9 ft. 
.FRI...N to NE winds less than 10 kt. Seas subsiding to 2 to 4 
ft.
.FRI NIGHT...W to NW winds 15 to 25 kt. Seas building to 4 to 8 
ft.
.SAT...W to NW winds 20 to 30 kt. Seas 5 to 9 ft. 
.SAT NIGHT...NW winds 20 to 30 kt, becoming N to NW 10 to 20 kt.
Seas 4 to 7 ft, subsiding to 3 to 5 ft. 
.SUN...Winds becoming S 5 to 10 kt, then S to SW 10 to 20 kt. 
Seas subsiding to 1 to 3 ft. 
.SUN NIGHT...S winds 10 to 20 kt, becoming SW. Seas building to
4 to 7 ft.
.MON...W to SW winds 10 to 20 kt. Seas 3 to 6 ft. 
.MON NIGHT...W winds 5 to 15 kt. Seas subsiding to 2 to 3 ft. 

$$

ANZ828-141445-
Cape Charles Light to Currituck Beach Light to 100 nm offshore-
922 PM EST Wed Dec 13 2017

...GALE WARNING...

.TONIGHT...SW winds 20 to 25 kt, increasing to 25 to 35 kt. Seas
7 to 11 ft. 
.THU...W winds 25 to 35 kt, becoming W to NW 20 to 30 kt. Seas
7 to 12 ft. 
.THU NIGHT...N winds 10 to 20 kt, diminishing to 5 to 15 kt.
Seas 5 to 8 ft. 
.FRI...NE winds 5 to 10 kt, becoming SW 10 to 20 kt. Seas
subsiding to 3 to 5 ft. 
.FRI NIGHT...W to NW winds increasing to 20 to 30 kt. Seas
building to 6 to 10 ft.
.SAT...W to NW winds 15 to 25 kt. Seas 5 to 9 ft. 
.SAT NIGHT...NW winds 10 to 20 kt, becoming W to NW 5 to 15 kt.
Seas subsiding to 3 to 5 ft. 
.SUN...Winds becoming S to SE 5 to 10 kt, then S 10 to 15 kt. 
Seas 2 to 4 ft. 
.SUN NIGHT...S winds increasing to 15 to 25 kt, then becoming SW
20 to 30 kt. Seas building to 5 to 9 ft. 
.MON...SW winds diminishing to 10 to 20 kt, then becoming W. 
Seas 4 to 8 ft, becoming 3 to 6 ft.
.MON NIGHT...W winds 10 to 20 kt. Seas subsiding to 2 to 4 ft. 

$$

ANZ925-141445-
Baltimore Canyon to Hatteras Canyon between 100 nm and 250 nm
offshore-
922 PM EST Wed Dec 13 2017

...GALE WARNING...

.TONIGHT...W winds 15 to 20 kt, becoming SW 25 to 35 kt. Seas
8 to 14 ft. 
.THU...W to SW winds 35 to 45 kt. Seas 10 to 18 ft. Scattered
showers and TSTMs.
.THU NIGHT...W to NW winds 15 to 25 kt. Seas 9 to 15 ft. 
.FRI...N to NW winds diminishing to less than 10 kt, then becoming
SW 15 to 25 kt. Seas subsiding to 5 to 8 ft. 
.FRI NIGHT...W to NW winds increasing to 30 to 40 kt. Seas
building to 8 to 14 ft.
.SAT...W winds 25 to 30 kt, becoming NW 20 to 30 kt. Seas 8 to
13 ft. 
.SAT NIGHT...NW winds 20 to 30 kt. Seas 8 to 13 ft. 
.SUN...N winds diminishing to 10 to 20 kt, then becoming S 5 to 
15 kt. Seas subsiding to 6 to 9 ft. 
.SUN NIGHT...S to SW winds 20 to 30 kt. Seas 5 to 9 ft. 
.MON...W to SW winds 15 to 25 kt. Seas 5 to 9 ft. 
.MON NIGHT...W winds 10 to 20 kt. Seas 5 to 8 ft. 

$$

ANZ830-141445-
Currituck Beach Light to Cape Hatteras to 100 nm offshore-
922 PM EST Wed Dec 13 2017

...GALE WARNING...

.TONIGHT...SW winds 15 to 25 kt, increasing to 25 to 35 kt. Seas
7 to 11 ft. 
.THU...W winds 25 to 35 kt, diminishing to 20 to 25 kt. Seas
7 to 12 ft. 
.THU NIGHT...NW winds 10 to 20 kt, becoming N to NE 5 to 10 kt.
Seas 5 to 8 ft. 
.FRI...Variable winds less than 10 kt, becoming W 20 to 30 kt.
Seas 4 to 7 ft. 
.FRI NIGHT...W to NW winds 20 to 30 kt. Seas building to 6 to 11
ft.
.SAT...NW winds 15 to 25 kt. Seas 5 to 9 ft. 
.SAT NIGHT...NW winds 10 to 20 kt, diminishing to 5 to 15 kt.
Seas subsiding to 3 to 6 ft. 
.SUN...Winds becoming E to SE 5 to 10 kt, then S 10 to 15 kt. 
Seas 2 to 4 ft. 
.SUN NIGHT...S to SW winds increasing to 20 to 30 kt. Seas
building to 5 to 9 ft.
.MON...SW winds diminishing to 10 to 20 kt, then becoming W 15 
to 25 kt. Seas 5 to 9 ft. 
.MON NIGHT...W winds 10 to 20 kt. Seas subsiding to 3 to 6 ft. 

$$

ANZ833-141445-
Cape Hatteras to Cape Fear to 100 nm offshore-
922 PM EST Wed Dec 13 2017

...GALE WARNING...

.TONIGHT...SW winds 15 to 25 kt, becoming W to SW 25 to 35 kt.
Seas 6 to 11 ft. 
.THU...W winds 25 to 35 kt, diminishing to 15 to 25 kt. Seas
7 to 12 ft. 
.THU NIGHT...W to NW winds 10 to 20 kt, becoming N to NW less
than 10 kt. Seas 5 to 8 ft. 
.FRI...Winds becoming SW 10 to 20 kt, then becoming W 20 to 30 
kt. Seas 4 to 7 ft. Chance of showers. 
.FRI NIGHT...W winds 20 to 30 kt, becoming NW 15 to 25 kt. Seas
building to 6 to 11 ft. 
.SAT...NW winds 15 to 25 kt. Seas subsiding to 4 to 8 ft. 
.SAT NIGHT...NW winds diminishing to 5 to 15 kt, becoming N 5 to
10 kt. Seas 3 to 6 ft. 
.SUN...Winds becoming E to SE 5 to 10 kt, then S 10 to 15 kt. 
Seas 2 to 4 ft. 
.SUN NIGHT...S winds increasing to 20 to 30 kt. Seas building
to 5 to 9 ft.
.MON...Winds becoming W to SW 15 to 25 kt. Seas 6 to 9 ft.
.MON NIGHT...W winds 10 to 20 kt. Seas subsiding to 3 to 6 ft. 

$$

ANZ930-141445-
Hatteras Canyon to Cape Fear between 100 nm and 250 nm offshore-
922 PM EST Wed Dec 13 2017

...GALE WARNING...

.TONIGHT...W to SW winds 15 to 20 kt, becoming SW 25 to 35 kt.
Seas 8 to 14 ft. 
.THU...W to SW winds 25 to 35 kt, becoming W 20 to 30 kt. Seas
9 to 14 ft. Chance of showers and TSTMs.
.THU NIGHT...W winds 15 to 25 kt. Seas 8 to 13 ft. 
.FRI...W to SW winds 10 to 20 kt, increasing to 20 to 30 kt.
Seas subsiding to 4 to 7 ft. Slight chance of showers. 
.FRI NIGHT...W winds 25 to 35 kt, becoming W to NW 20 to 30 kt.
Seas building to 7 to 13 ft. 
.SAT...NW winds 15 to 25 kt. Seas 7 to 11 ft. 
.SAT NIGHT...N to NW winds 10 to 20 kt. Seas 5 to 9 ft. 
.SUN...N to NE winds 5 to 15 kt, becoming S to SE. Seas 4 to
8 ft. 
.SUN NIGHT...S winds increasing to 20 to 30 kt. Seas 5 to 9 ft. 
.MON...SW winds diminishing to 15 to 20 kt. Seas 5 to 9 ft. 
.MON NIGHT...SW winds 15 to 20 kt, becoming W. Seas 5 to 8 ft. 

$$

ANZ835-141445-
Cape Fear to 31N to 1000 fm-
922 PM EST Wed Dec 13 2017

.TONIGHT...SW winds 15 to 25 kt, becoming W 20 to 30 kt. Seas
5 to 9 ft. 
.THU...W winds 20 to 30 kt. Seas 6 to 11 ft. 
.THU NIGHT...W winds 10 to 20 kt, diminishing to 5 to 15 kt.
Seas 4 to 7 ft. 
.FRI...W winds 10 to 20 kt, increasing to 20 to 30 kt. Seas 3 to
6 ft. 
.FRI NIGHT...W winds 20 to 30 kt, becoming NW 10 to 20 kt. Seas
building to 5 to 9 ft. 
.SAT...N to NW winds 5 to 15 kt. Seas subsiding to 3 to 6 ft. 
.SAT NIGHT...Variable winds 5 to 15 kt, becoming E to NE. Seas
2 to 4 ft. 
.SUN...SE winds 5 to 15 kt, becoming S. Seas 1 to 3 ft. 
.SUN NIGHT...S winds increasing to 20 to 30 kt. Seas building to 5
to 9 ft.
.MON...SW winds diminishing to 10 to 20 kt. Seas 4 to 7 ft. 
.MON NIGHT...SW winds 10 to 20 kt, becoming W. Seas 3 to 5 ft. 

$$

ANZ935-141445-
Cape Fear to 31N east of 1000 fm to 250 nm offshore-
922 PM EST Wed Dec 13 2017

.TONIGHT...SW winds 10 to 20 kt, becoming W to SW 20 to 30 kt.
Seas 7 to 12 ft. 
.THU...W winds 20 to 30 kt. Seas 7 to 11 ft. 
.THU NIGHT...W winds 15 to 25 kt. Seas 6 to 10 ft. 
.FRI...W winds 10 to 20 kt, increasing to 20 to 30 kt. Seas
subsiding to 4 to 7 ft. 
.FRI NIGHT...W to NW winds 20 to 30 kt. Seas building to 6 to 10
ft.
.SAT...NW winds 15 to 25 kt, diminishing to 5 to 15 kt. Seas
6 to 10 ft, subsiding to 4 to 8 ft. 
.SAT NIGHT...N to NE winds 5 to 15 kt. Seas 4 to 7 ft, subsiding
to 3 to 5 ft.
.SUN...E to SE winds 10 to 15 kt. Seas 3 to 5 ft. 
.SUN NIGHT...S winds increasing to 15 to 25 kt. Seas building to
4 to 8 ft.
.MON...S to SW winds 10 to 20 kt. Seas 4 to 7 ft. 
.MON NIGHT...W to SW winds 10 to 20 kt. Seas 3 to 6 ft. 

$$

.Forecaster Figurskey. Ocean Prediction Center.
Last Update:02:23Z, 14 December 2017
Updates: Four times per day

FZNT01 KWBC 132209
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV 
NWS OCEAN PREDICTION CENTER WASHINGTON DC 
2230 UTC WED DEC 13 2017 

CCODE/1:31:04:01:00/AOW/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). 

SECURITE 

NORTH ATLANTIC NORTH OF 31N TO 67N AND WEST OF 35W 

SYNOPSIS VALID 1800 UTC DEC 13 
24 HOUR FORECAST VALID 1800 UTC DEC 14 
48 HOUR FORECAST VALID 1800 UTC DEC 15 

.WARNINGS. 

...STORM WARNING...
.LOW INLAND 48N66W 974 MB MOVING NW 20 KT. WITHIN 360 NM E 
QUADRANT AND WITHIN 240 NM W OF A FRONT FROM 43N60W TO 38N60W 
WINDS 40 TO 50 KT. SEAS 16 TO 26 FT. ELSEWHERE OVER FORECAST 
WATERS WITHIN 600 NM NE QUADRANT AND FROM 31N TO 50N BETWEEN 50W 
AND 76W WINDS 25 TO 40 KT. SEAS 8 TO 16 FT.
.24 HOUR FORECAST NEW LOW 56N61W 963 MB. WITHIN 360 NM N AND 600 
NM E QUADRANTS WINDS 40 TO 50 KT. SEAS 16 TO 28 FT. ELSEWHERE 
OVER FORECAST WATERS WITHIN 660 NM S...840 NM E...AND 540 NM N 
QUADRANTS WINDS 25 TO 40 KT. SEAS 12 TO 22 FT.
.48 HOUR FORECAST NEW LOW 55N61W 965 MB. WITHIN 300 NM SE 
QUADRANT WINDS 40 TO 50 KT. SEAS 14 TO 20 FT. ELSEWHERE WITHIN 
600 NM SE QUADRANT WINDS 25 TO 40 KT. SEAS 9 TO 18 FT. 

...STORM WARNING...
.24 HOUR FORECAST LOW 41N64W 992 MB. WITHIN 360 NM SW QUADRANT 
WINDS 40 TO 55 KT. SEAS 16 TO 22 FT. ELSEWHERE WITHIN 960 NM SW 
AND 360 NM SE QUADRANTS WINDS 25 TO 40 KT. SEAS 8 TO 16 FT. 
.48 HOUR FORECAST LOW 58N52W 961 MB. WITHIN 240 NM NE QUADRANT 
WINDS 40 TO 55 KT. SEAS 16 TO 26 FT. ELSEWHERE WITHIN 840 NM SE 
AND 300 NM N QUADRANTS WINDS 25 TO 40 KT. SEAS 10 TO 20 FT.

...STORM WARNING...
.LOW WELL E OF AREA. FROM 56N TO 61N BETWEEN 35W AND 44W WINDS 
40 TO 50 KT. SEAS 18 TO 30 FT. ELSEWHERE FROM 54N TO 67N BETWEEN 
35W AND 47W WINDS 25 TO 40 KT. SEAS 12 TO 18 FT.
.24 HOUR FORECAST LOW AND ASSOCIATED CONDITIONS WELL E OF AREA.

...GALE WARNING... 
.LOW 45N44W 1014 MB MOVING E 20 KT. WITHIN 420 NM E OF A LINE 
FROM 47N43W TO 35N51W WINDS 25 TO 40 KT. SEAS 8 TO 16 FT.
.24 HOUR FORECAST LOW WELL E OF AREA. FRONT TO EXTEND FROM 
49N37W TO 36N50W. WITHIN 300 NM E OF THE FRONT WINDS 20 TO 30 
KT. SEAS 8 TO 14 FT.
.48 HOUR FORECAST FRONT TO EXTEND FROM 49N37W TO 36N50W. WITHIN 
240 NM E OF THE FRONT WINDS 20 TO 30 KT. SEAS 8 TO 14 FT.

...HEAVY FREEZING SPRAY WARNING... 
.24 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY W OF A LINE 
FROM 47N64W TO 50N62W. LIGHT TO MODERATE FREEZING SPRAY NW OF A 
LINE FROM 61N60W TO 63N50W. 
.48 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY W OF A LINE 
FROM 47N64W TO 50N61W. LIGHT TO MODERATE FREEZING SPRAY W OF A 
LINE FROM 55N54W TO 61N64W. 

.SYNOPSIS AND FORECAST. 

.48 HOUR FORECAST NEW LOW 41N51W 1010 MB. WITHIN 180 NM SE OF A 
LINE FROM 45N45W TO 39N60W WINDS 20 TO 30 KT. SEAS 10 TO 17 FT. 

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 43N TO 47N 
BETWEEN 49W AND 60W AND FROM 47N TO 49N BETWEEN 60W AND 64W.  
.24 HOUR FORECAST DENSE FOG FROM 46N TO 49N BETWEEN 35W AND 38W. 
.48 HOUR FORECAST CONDITIONS IMPROVED. 

.HIGH 52N43W 1025 MB MOVING E 20 KT. 
.24 HOUR FORECAST HIGH E OF THE AREA. 

.12 HOUR FORECAST NEW HIGH 60N59W 1022 MB. 
.24 HOUR FORECAST HIGH N OF AREA. 

.FORECASTER KREKELER. OCEAN PREDICTION CENTER.

NATIONAL HURRICANE CENTER MIAMI FL

ATLANTIC FROM 07N TO 31N W OF 35W INCLUDING CARIBBEAN SEA AND
GULF OF MEXICO

SYNOPSIS VALID 1800 UTC WED DEC 13.
24 HOUR FORECAST VALID 1800 UTC THU DEC 14.
48 HOUR FORECAST VALID 1800 UTC FRI DEC 15.

.WARNINGS.

...GALE WARNING...
.GULF OF MEXICO 36 HOUR FORECAST COLD FRONT FROM 30N92W TO 
26N97W. W OF FRONT N TO NE WINDS 20 TO 25 KT. SEAS LESS THAN 8 
FT.
.48 HOUR FORECAST COLD FRONT FROM 30N84W TO 25N96W TO 21N97W. 
FROM 22N TO 24N W OF 97W N TO NW WINDS 30 TO 35 KT. SEAS 9 TO 12 
FT. ELSEWHERE W OF FRONT AND S OF 28N N TO NW WINDS 20 TO 30 KT. 
SEAS TO 10 FT.

.SYNOPSIS AND FORECAST.

.COLD FRONT FROM 31N65W TO 25N72W TO 23N80W. N OF 28N E OF FRONT 
TO 55W SW WINDS 20 TO 30 KT. SEAS 8 TO 13 FT. N OF 29N W OF 
FRONT TO 72W NW WINDS 20 TO 25 KT. SEAS 12 TO 15 FT...AND 8 TO 
12 FT IN NW SWELL ELSEWHERE N OF 26N W OF FRONT TO 77W.
.12 HOUR FORECAST DISSIPATING COLD FRONT FROM 31N60W TO 25N71W. 
N OF LINE FROM 31N53W TO 24N71W TO 29N73W WINDS 20 KT OR LESS. 
SEAS 8 TO 13 FT IN NW SWELL.
.24 HOUR FORECAST DISSIPATING STATIONARY FRONT FROM 31N53W TO 
20N70W. N OF LINE FROM 31N51W TO 26N59W TO 24N65W TO 31N72W 
WINDS 20 KT OR LESS. SEAS 8 TO 12 FT IN NW SWELL.
.48 HOUR FORECAST TROUGH FROM 31N53W TO 25N60W. N OF LINE FROM 
31N39W TO 22N47W TO 24N54W TO 31N57W WINDS 20 KT OR LESS. SEAS 8 
TO 10 FT IN NW SWELL.

.ATLC N OF 22N E OF 39W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN 
MIXED NW AND E SWELL.
.24 HOUR FORECAST E OF LINE FROM 31N35W TO 24N43W TO 18N35W 
WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED NW AND E SWELL.
.48 HOUR FORECAST FROM 17N TO 28N E OF 40W WINDS 20 KT OR LESS. 
SEAS 8 TO 9 FT IN MIXED NW AND E SWELL.

.CARIBBEAN DISSIPATING STATIONARY FRONT FROM 20N72W TO 15N78W TO 
10N80W. S OF 17N W OF FRONT TO 83W N WINDS 20 TO 25 KT. SEAS TO 
9 FT.
.24 HOUR FORECAST FRONT DISSIPATED. WINDS 20 KT OR LESS. SEAS 
LESS THAN 8 FT.

.CARIBBEAN 06 HOUR FORECAST FROM 11N TO 12N BETWEEN 73W AND 75W 
NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.18 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST FROM 11N TO 13N BETWEEN 70W AND 76W NE TO E 
WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST FROM 11N TO 15N BETWEEN 71W AND 79W NE TO E 
WINDS 20 TO 25 KT. SEAS TO 10 FT. 

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

$$
.FORECASTER MCELROY. NATIONAL HURRICANE CENTER.
Last Update:22:10Z, 13 December 2017
Updates: Four times per day