Atlantic Text Briefing Package

[Printable Version]
AGNT40 KWNM 191408
MIMATN

Marine Weather Discussion for N Atlantic Ocean
NWS Ocean Prediction Center Washington DC
1008 AM EDT Mon Apr 19 2021

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

The latest NCEP surface analysis shows a weak complex low 
pressure system in the NT2 offshore waters this morning. The
models are in good agreement with this system over the short
term, and indicate that the SW low will move NE across the Gulf
Stream today into tonight which is expected to enhance its
development. There has been an increasing signal in the guidance
over the past day for gales to develop near this low, though to
the E of the offshore waters. There is a slight chance for this
to occur in the offshore waters, but confidence is below average
on this right now as the bulk of the model guidance shows this
happening E of the offshore zones. The previous forecast capped
winds at 30 kt in NT2 over the next 36 hours, so planning in
staying near that in the update package since nothing in the 06Z
model guidance would indicate a change is needed.

The models then stay in decent agreement over the remainder of
the forecast period on the synoptic pattern, and all show another
strong low pressure system moving into the W Atlc late Wed. There
are some slight differences on the timing and intensity between
the global models, but overall there remains a persistent signal
in the guidance for the development of gale force conditions in
the cold air advection starting Wed night and continuing into
Fri. However, the 06Z GFS trended a little weaker with the winds,
and there has been a hint in the models that the winds may not
continue at gale force into Fri. Despite that, there are still a
number of solutions that support the previous hazard grids, so
planning on staying with them in the update package with above
average confidence. Otherwise, will not be making any
significant changes for the remainder of the forecast period.

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

The preliminary 06Z OPC-NCEP surface analysis continues to show
low pressure along a nearly stationary front over the southern
portions of the offshore waters, with a 1010 mb low pressure 
center NE of Cape Fear, and a weak 1014 mb high E of the 
Virginia Capes. ASCAT data from last evening indicated the
stronger winds up to 25 kt or so, over the far NE NT2 waters, and
then over the far southern NT2 waters, likely associated with the
thunderstorm convection over this region. GOES-IR satellite 
imagery and lightning data indicate scattered thunderstorms near 
and S of the stationary front off the Georgia and Carolina coasts
at this time. The latest SREF thunderstorm guidance keeps the 
highest threat for thunderstorms over the southern into the 
central NT2 waters today before chances diminish from W to E 
tonight into Tue. All mariners should use caution in and near 
thunderstorms especially over the southern into the central NT2 
waters today and tonight, with the stronger thunderstorms having 
the potential to produce gusts to gale force or higher, and very
rough waves. The low off the Carolina coast will move E today, 
and clear E of the waters around midnight tonight. Some of the 
shorter term, high resolution, guidance indicates a chance for 
gale force winds developing around the low today. For the early 
morning package, we will keep any gales E of the offshore waters 
later tonight into Tue, as has been in the forecast for the past 
few days. We would not be surprised to see gale force gusts 
develop near the low today into tonight, and especially in 
thunderstorm convection. Adjustment to the forecast are possible
today and mariners should monitor the latest forecast. 
Conditions will improve Tue as high pressure builds over most of 
the region. For today, we will populate with an even blend of 
the 00Z Warw winds and 00Z GFS winds, and transition towards the 
00Z GFS winds for tonight into Tue. Forecast confidence over the 
short term is near average.

For Tue night through Fri night, the main concern will be the
passage of a strong cold front, later Wed and Wed night, 
followed by a secondary strong cold front Thu into Thu night
before high pressure builds into the region Fri and Fri night.
For the early morning package, we will populate grids with the
00Z GFS winds for Tue night, and then transition towards the 
bias-corrected 00Z ECMWF winds for Wed through Fri night.
Overall, the forecast is fairly consistent from the past few OPC
forecasts, except to expand the gale force winds expected mainly
in the strong cold air advection in the wake of the strong cold
fronts crossing the region Wed night into Thu night, with the
gales slowly shifting E of the area Fri and Fri eve. Forecast
confidence remains near average from Tue night through Fri night
over the waters. 

.SEAS...Both the 00Z GFS Wave and 00Z ECMWF WAM are verifying
quite well over the area early this morning, with wave heights
mostly running up to 6 ft over the offshore waters. For today
into Tue night we will populate grids with an even blend of these
two wave models, and then transition more towards the WAM for Wed
through Fri night to best match the wind forecast. We will also
add up to 10 percent to the guidance Wed night into Fri over the
gulf stream waters where guidance typically underperforms
especially with the strong cold air advection forecast by mid to
late week. 

.EXTRATROPICAL STORM SURGE GUIDANCE...No significant positive
surge events are expected over the next few days. Please monitor
products from coastal National Weather Service offices for 
detailed water level information.

.WARNINGS...Preliminary.

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

.NT2 Mid-Atlantic Waters...
.ANZ820...Hudson Canyon to Baltimore Canyon...
     Gale Possible Thursday.
.ANZ915...Hudson Canyon to the Great South Channel...
     Gale Possible Wednesday night into Friday. 
.ANZ920...Baltimore Canyon to the Great South Channel...
     Gale Possible Wednesday night into Friday. 
.ANZ905...The Great South Channel to the Hague Line...
     Gale Possible Wednesday night into Friday night. 
.ANZ910...East of the Great South Channel and south of 39N...
     Gale Possible Wednesday night into Friday night. 

$$

.Forecaster Kells/Mills. Ocean Prediction Center.
Last Update: Mon, 19-Apr-2021 14:09:09 UTC
Updates: Four times per day

FZNT21 KWBC 191438
OFFNT1

Offshore Waters Forecast
NWS Ocean Prediction Center Washington DC
1038 AM EDT Mon Apr 19 2021

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.

ANZ898-200245-
1038 AM EDT Mon Apr 19 2021

.SYNOPSIS FOR NEW ENGLAND WATERS...A series of weak low pressure
troughs are expected to slowly pass SE across the area today. A
high pressure ridge will build E over the southern portion of the
waters today, persist into Tue, and then shift E of the area Tue
night into early Wed as a strong cold front approaches from the
W. The strong cold front will move E over the waters later Wed
into Wed night, followed by a strong secondary cold front later
Thu into Thu night. Another series of low pressure troughs will
move SE across the area Fri and Fri night as high pressure builds
S and SW of the region.  

$$

ANZ800-200245-
Gulf of Maine to the Hague Line-
1038 AM EDT Mon Apr 19 2021

...GALE FORCE WINDS POSSIBLE THU...

.TODAY...W to SW winds 5 to 10 kt, becoming S to SW 5 to 15 kt.
Seas 3 to 4 ft. 
.TONIGHT...S to SW winds 5 to 15 kt, becoming SW 5 to 10 kt.
Seas 3 to 4 ft. 
.TUE...SW winds 5 to 15 kt, increasing to 10 to 20 kt. Seas 3 to
4 ft. 
.TUE NIGHT...W winds 10 to 20 kt, becoming S to SW 5 to 15 kt.
Seas 3 to 4 ft. 
.WED...S winds 15 to 25 kt. Seas 3 to 6 ft. 
.WED NIGHT...S winds 20 to 25 kt, becoming W 20 to 30 kt. Seas
4 to 8 ft. 
.THU...W winds 25 to 35 kt. Seas 9 to 16 ft. 
.THU NIGHT...W winds 25 to 35 kt. Seas 9 to 16 ft. 
.FRI...W winds 25 to 35 kt, diminishing to 20 to 30 kt. Seas
9 to 15 ft. 
.FRI NIGHT...W winds 15 to 25 kt. Seas 6 to 10 ft. 

$$

ANZ805-200245-
Georges Bank between Cape Cod and 68W north of 1000 FM-
1038 AM EDT Mon Apr 19 2021

...GALE FORCE WINDS POSSIBLE THU...

.TODAY...W to SW winds 5 to 10 kt, becoming S to SW. Seas 3 to
4 ft. 
.TONIGHT...W to SW winds 5 to 10 kt. Seas 3 to 4 ft. 
.TUE...SW winds 5 to 15 kt, increasing to 10 to 20 kt. Seas 3 to
4 ft. 
.TUE NIGHT...W to SW winds 5 to 15 kt, becoming S. Seas 3 to
4 ft. 
.WED...S winds 15 to 25 kt. Seas 3 to 5 ft. 
.WED NIGHT...S winds 15 to 25 kt, becoming W 20 to 30 kt. Seas
6 to 10 ft. 
.THU...W winds 25 to 35 kt. Seas 9 to 16 ft. 
.THU NIGHT...W winds 25 to 35 kt. Seas 10 to 17 ft.
.FRI...W winds 25 to 35 kt, diminishing to 20 to 30 kt. Seas
8 to 14 ft. 
.FRI NIGHT...W winds 20 to 30 kt. Seas 7 to 12 ft. 

$$

ANZ900-200245-
Georges Bank between 68W and the Hague Line-
1038 AM EDT Mon Apr 19 2021

...GALE FORCE WINDS POSSIBLE THU...

.TODAY...W to SW winds 5 to 10 kt. Seas 3 to 4 ft. 
.TONIGHT...W to SW winds 5 to 10 kt. Seas 3 to 4 ft. 
.TUE...W to SW winds 5 to 15 kt, becoming SW 10 to 20 kt. Seas
3 to 4 ft. 
.TUE NIGHT...W to SW winds 5 to 15 kt, becoming S to SW 5 to
10 kt. Seas 3 to 4 ft. 
.WED...S winds 15 to 25 kt. Seas 3 to 6 ft. 
.WED NIGHT...S winds 15 to 25 kt, becoming W 20 to 30 kt. Seas
5 to 9 ft. 
.THU...W winds 30 to 40 kt. Seas 10 to 17 ft. 
.THU NIGHT...W winds 25 to 35 kt. Seas 13 to 18 ft.
.FRI...W winds 25 to 35 kt. Seas 10 to 15 ft. 
.FRI NIGHT...W winds 20 to 30 kt. Seas 7 to 13 ft. 

$$

ANZ810-200245-
South of New England between the Great South Channel and Montauk
Point to 1000 FM-
1038 AM EDT Mon Apr 19 2021

...GALE FORCE WINDS POSSIBLE THU...

.TODAY...SW winds 5 to 10 kt. Seas 3 to 4 ft. 
.TONIGHT...W to SW winds 5 to 10 kt. Seas 3 to 4 ft. 
.TUE...SW winds 10 to 15 kt. Seas 3 to 4 ft. 
.TUE NIGHT...SW winds 10 to 15 kt, becoming S. Seas 3 to 4 ft. 
.WED...S winds 15 to 25 kt. Seas 3 to 6 ft. 
.WED NIGHT...W to SW winds 20 to 30 kt. Seas 6 to 11 ft. 
.THU...W winds 30 to 40 kt. Seas 9 to 16 ft. 
.THU NIGHT...W winds 25 to 35 kt, becoming 25 to 30 kt. Seas
10 to 17 ft. 
.FRI...W winds 20 to 30 kt. Seas 7 to 12 ft. 
.FRI NIGHT...W winds 20 to 30 kt, diminishing to 15 to 20 kt.
Seas 7 to 11 ft. 

$$

ANZ815-200245-
South of Long Island between Montauk Point and Sandy Hook to
1000 FM-
1038 AM EDT Mon Apr 19 2021

...GALE FORCE WINDS POSSIBLE THU...

.TODAY...S to SW winds less than 10 kt. Seas 3 to 4 ft. 
.TONIGHT...SW winds 5 to 15 kt, becoming W to SW 5 to 10 kt.
Seas 3 ft, becoming 2 ft or less. 
.TUE...SW winds 10 to 15 kt. Seas 3 to 4 ft. 
.TUE NIGHT...S to SW winds 10 to 15 kt, becoming S 10 to 20 kt.
Seas 3 to 5 ft. 
.WED...S winds 15 to 25 kt. Seas 4 to 6 ft. 
.WED NIGHT...W to NW winds 20 to 30 kt. Seas 7 to 11 ft. 
.THU...W winds 25 to 35 kt. Seas 9 to 15 ft. 
.THU NIGHT...W winds 25 to 35 kt, diminishing to 20 to 30 kt.
Seas 8 to 14 ft. 
.FRI...W winds 20 to 30 kt. Seas 6 to 10 ft. 
.FRI NIGHT...W winds 20 to 30 kt. Seas 5 to 8 ft. 

$$

.Forecaster Kells. Ocean Prediction Center.
Last Update: Mon, 19-Apr-2021 14:39:46 UTC
Updates: Four times per day

FZNT22 KWBC 191440
OFFNT2

Offshore Waters Forecast
NWS Ocean Prediction Center Washington DC
1040 AM EDT Mon Apr 19 2021

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.

ANZ899-200245-
1040 AM EDT Mon Apr 19 2021

.SYNOPSIS FOR MID ATLC WATERS...Weak high pressure will move E
over the N portion today before passing E of the region tonight. 
A series of low pressure centers will move NE across the S
portion along a persistent stationary front today into tonight,
then pass E of the waters early Tue while slowly strengthening. 
Another high pressure area will build E across the region Tue, 
then shift E of the area Tue night into Wed. A weak low pressure 
area will track NE over the far southern waters Tue night into 
Wed. A strong cold front will approach the coast early Wed, and 
then move E and SE across the waters later Wed into Thu. A strong 
secondary cold front will move E across the northern waters later
Thu into Fri as another high pressure area builds E across the S
and central portions into Fri night. 

$$

ANZ820-200245-
Hudson Canyon to Baltimore Canyon to 1000 FM-
1040 AM EDT Mon Apr 19 2021

...GALE FORCE WINDS POSSIBLE THU...

.TODAY...Variable winds less than 5 kt, becoming N 5 to 15 kt.
Seas 3 to 4 ft. Scattered showers and isolated tstms. 
.TONIGHT...N to NE winds 5 to 15 kt, becoming W 5 to 10 kt. Seas
3 to 4 ft. Chance of showers. 
.TUE...S to SW winds 10 to 15 kt. Seas 3 to 4 ft. 
.TUE NIGHT...S winds 15 to 20 kt. Seas 3 to 5 ft. 
.WED...S winds 15 to 25 kt. Seas 3 to 6 ft. 
.WED NIGHT...W to NW winds 20 to 30 kt. Seas 7 to 11 ft. 
.THU...W winds 25 to 35 kt. Seas 7 to 13 ft. 
.THU NIGHT...W to NW winds 20 to 30 kt. Seas 7 to 12 ft. 
.FRI...W winds 20 to 30 kt. Seas 5 to 9 ft. 
.FRI NIGHT...W winds 20 to 30 kt. Seas 5 to 8 ft. 

$$

ANZ915-200245-
Between 1000FM and 38.5 N west of 69 W-
1040 AM EDT Mon Apr 19 2021

...GALE FORCE WINDS POSSIBLE WED NIGHT...

.TODAY...S to SW winds less than 10 kt, becoming variable. Seas
3 to 4 ft. 
.TONIGHT...Variable winds 5 to 15 kt, becoming N. Seas 3 to
4 ft. Chance of showers. 
.TUE...W to SW winds 5 to 15 kt. Seas 3 to 4 ft. 
.TUE NIGHT...SW winds 10 to 15 kt, becoming S 10 to 20 kt. Seas
3 to 4 ft. 
.WED...S winds 15 to 25 kt. Seas 3 to 6 ft. 
.WED NIGHT...W to NW winds 25 to 35 kt. Seas 7 to 12 ft. 
.THU...W winds 30 to 40 kt. Seas 11 to 17 ft. 
.THU NIGHT...W winds 30 to 35 kt. Seas 10 to 17 ft.
.FRI...W winds 25 to 30 kt, becoming 25 to 35 kt. Seas 7 to
13 ft. 
.FRI NIGHT...W winds 20 to 30 kt. Seas 7 to 12 ft. 

$$

ANZ920-200245-
Baltimore Canyon to 69W east of 1000 FM and south of 38.5N to
250 NM offshore-
1040 AM EDT Mon Apr 19 2021

...GALE FORCE WINDS POSSIBLE WED NIGHT...

.TODAY...SE winds 5 to 15 kt, becoming E 10 to 20 kt. Seas 3 to
4 ft. Isolated tstms. 
.TONIGHT...E to NE winds 15 to 25 kt, becoming N 20 to 30 kt.
Seas 4 to 7 ft. Scattered showers and tstms with vsby 1 nm or
less. 
.TUE...N winds 10 to 20 kt, becoming W to SW 5 to 15 kt. Seas
3 to 6 ft. 
.TUE NIGHT...S winds 5 to 15 kt, increasing to 10 to 20 kt. Seas
3 to 5 ft. 
.WED...S winds 15 to 25 kt. Seas 3 to 6 ft. 
.WED NIGHT...W to NW winds 20 to 30 kt, increasing to 25 to
35 kt. Seas 6 to 11 ft. 
.THU...W winds 30 to 35 kt. Seas 11 to 19 ft. 
.THU NIGHT...W to NW winds 25 to 35 kt. Seas 10 to 18 ft. 
.FRI...W winds 20 to 30 kt, increasing to 25 to 35 kt. Seas 9 to
15 ft. 
.FRI NIGHT...W winds 20 to 30 kt. Seas 7 to 13 ft. 

$$

ANZ905-200245-
East of 69W to the Hague Line between 1000 FM and 39N-
1040 AM EDT Mon Apr 19 2021

...GALE FORCE WINDS POSSIBLE WED NIGHT...

.TODAY...W winds 5 to 15 kt. Seas 3 to 5 ft. 
.TONIGHT...Variable winds less than 10 kt, becoming N to NE.
Seas 3 to 4 ft. 
.TUE...N to NW winds 5 to 15 kt, becoming W 10 to 15 kt. Seas
3 to 4 ft. 
.TUE NIGHT...W to SW winds 10 to 15 kt, becoming S to SW. Seas
3 to 4 ft. 
.WED...S winds 15 to 25 kt. Seas 3 to 6 ft. 
.WED NIGHT...S winds 15 to 25 kt, becoming W 25 to 35 kt. Seas
6 to 11 ft. 
.THU...W winds 30 to 40 kt. Seas 10 to 17 ft. 
.THU NIGHT...W winds 30 to 40 kt. Seas 12 to 20 ft.
.FRI...W winds 30 to 35 kt. Seas 11 to 17 ft. 
.FRI NIGHT...W winds 25 to 35 kt, diminishing to 20 to 30 kt.
Seas 10 to 17 ft. 

$$

ANZ910-200245-
East of 69W and south of 39N to 250 NM offshore-
1040 AM EDT Mon Apr 19 2021

...GALE FORCE WINDS POSSIBLE WED NIGHT...

.TODAY...Variable winds less than 10 kt, increasing to 5 to
15 kt. Seas 3 to 4 ft. 
.TONIGHT...E to NE winds 15 to 25 kt. Seas 3 to 6 ft. Scattered
showers. 
.TUE...N winds 10 to 20 kt, becoming W to NW 5 to 10 kt. Seas
3 to 6 ft. Chance of rain. 
.TUE NIGHT...SW winds less than 10 kt, becoming S. Seas 3 to
5 ft. 
.WED...S winds 15 to 25 kt. Seas 4 to 7 ft. 
.WED NIGHT...S to SW winds 20 to 30 kt, becoming W 25 to 35 kt.
Seas 6 to 11 ft. 
.THU...W winds 30 to 40 kt. Seas 11 to 19 ft. 
.THU NIGHT...W winds 30 to 35 kt. Seas 13 to 19 ft.
.FRI...W winds 25 to 35 kt. Seas 11 to 17 ft. 
.FRI NIGHT...W winds 25 to 35 kt, diminishing to 20 to 30 kt.
Seas 9 to 16 ft. 

$$

ANZ825-200245-
Baltimore Canyon to Cape Charles Light to 100 NM offshore-
1040 AM EDT Mon Apr 19 2021

.TODAY...E winds less than 10 kt, becoming N 10 to 20 kt. Seas
3 to 4 ft. Showers likely and chance of tstms. 
.TONIGHT...N winds 15 to 25 kt, becoming N to NW 5 to 15 kt.
Seas 3 to 6 ft. Showers and scattered tstms. 
.TUE...S to SW winds 5 to 15 kt. Seas 3 to 4 ft. 
.TUE NIGHT...S winds 10 to 20 kt. Seas 3 to 4 ft. 
.WED...S to SW winds 15 to 25 kt. Seas 3 to 6 ft. 
.WED NIGHT...NW winds 20 to 30 kt. Seas 6 to 10 ft. 
.THU...W to NW winds 20 to 30 kt. Seas 6 to 11 ft. 
.THU NIGHT...W to NW winds 20 to 30 kt. Seas 6 to 10 ft. 
.FRI...W to NW winds 15 to 25 kt. Seas 3 to 6 ft. 
.FRI NIGHT...W to SW winds 10 to 20 kt. Seas 3 to 5 ft. 

$$

ANZ828-200245-
Cape Charles Light to Currituck Beach Light to 100 NM offshore-
1040 AM EDT Mon Apr 19 2021

.TODAY...E winds 10 to 15 kt, becoming N 10 to 20 kt. Seas 3 to
4 ft. Showers likely and chance of tstms. 
.TONIGHT...N winds 20 to 30 kt. Seas 4 to 7 ft. Showers and
scattered tstms. 
.TUE...SW winds less than 10 kt, becoming S 10 to 20 kt. Seas
3 to 6 ft. 
.TUE NIGHT...S winds 10 to 20 kt, becoming 10 to 15 kt. Seas
3 to 4 ft. 
.WED...S to SW winds 15 to 25 kt. Seas 3 to 5 ft. 
.WED NIGHT...NW winds 20 to 30 kt. Seas 6 to 11 ft. 
.THU...NW winds 20 to 25 kt, becoming W 20 to 30 kt. Seas 6 to
11 ft. 
.THU NIGHT...W to NW winds 20 to 30 kt. Seas 5 to 9 ft. 
.FRI...W to NW winds 10 to 20 kt. Seas 3 to 6 ft. 
.FRI NIGHT...W to SW winds 5 to 15 kt. Seas 3 to 5 ft. 

$$

ANZ925-200245-
Baltimore Canyon to Hatteras Canyon between 100 NM and 250 NM
offshore-
1040 AM EDT Mon Apr 19 2021

.TODAY...E winds 10 to 20 kt. Seas 3 to 5 ft. Scattered showers
and tstms. 
.TONIGHT...N winds 20 to 30 kt. Seas 4 to 7 ft. Scattered
showers and tstms. 
.TUE...N winds 10 to 20 kt, becoming E to NE less than 10 kt.
Seas 4 to 7 ft. 
.TUE NIGHT...S to SE winds 5 to 15 kt. Seas 3 to 6 ft. 
.WED...S winds 10 to 20 kt, becoming S to SW 20 to 30 kt. Seas
4 to 6 ft. 
.WED NIGHT...W to NW winds 20 to 30 kt. Seas 7 to 12 ft. 
.THU...NW winds 20 to 30 kt, becoming W. Seas 9 to 15 ft. 
.THU NIGHT...W winds 20 to 30 kt, becoming NW. Seas 9 to 15 ft. 
.FRI...W to NW winds 20 to 30 kt. Seas 8 to 13 ft. 
.FRI NIGHT...W to NW winds 15 to 25 kt. Seas 6 to 10 ft. 

$$

ANZ830-200245-
Currituck Beach Light to Cape Hatteras to 100 NM offshore-
1040 AM EDT Mon Apr 19 2021

.TODAY...E winds 5 to 15 kt, becoming N to NW 10 to 20 kt. Seas
3 to 4 ft. Scattered showers and tstms. 
.TONIGHT...N winds 20 to 30 kt. Seas 4 to 7 ft. Showers and
scattered tstms. 
.TUE...N to NE winds 5 to 15 kt, becoming S to SE. Seas 3 to
6 ft. 
.TUE NIGHT...S to SE winds 10 to 15 kt, becoming S to SW. Seas
3 to 4 ft. Isolated tstms. 
.WED...S winds 10 to 20 kt, becoming SW 15 to 25 kt. Seas 3 to
5 ft. 
.WED NIGHT...NW winds 20 to 30 kt. Seas 6 to 10 ft. 
.THU...NW winds 20 to 25 kt, becoming W 10 to 20 kt. Seas 6 to
11 ft. 
.THU NIGHT...W to NW winds 15 to 25 kt. Seas 4 to 8 ft. 
.FRI...W to NW winds 10 to 20 kt. Seas 4 to 7 ft. 
.FRI NIGHT...W winds 10 to 15 kt. Seas 3 to 5 ft. 

$$

ANZ833-200245-
Cape Hatteras to Cape Fear to 100 NM Offshore.-
1040 AM EDT Mon Apr 19 2021

.TODAY...Variable winds 5 to 15 kt, becoming W to SW 15 to
25 kt. Seas 3 to 5 ft. Scattered showers and tstms. 
.TONIGHT...N to NW winds 20 to 30 kt. Seas 4 to 7 ft. Scattered
showers. 
.TUE...NE winds 5 to 15 kt, becoming SE 5 to 10 kt. Seas 3 to
6 ft. 
.TUE NIGHT...S to SW winds 5 to 15 kt. Seas 3 to 4 ft. Scattered
showers. Isolated tstms. 
.WED...S to SW winds 15 to 25 kt. Seas 3 to 5 ft. 
.WED NIGHT...NW winds 20 to 30 kt. Seas 6 to 10 ft. 
.THU...NW winds 15 to 25 kt, becoming W to NW 10 to 15 kt. Seas
6 to 10 ft. 
.THU NIGHT...W to NW winds 10 to 20 kt. Seas 4 to 7 ft. 
.FRI...NW winds 5 to 15 kt, becoming W. Seas 3 to 6 ft. 
.FRI NIGHT...W winds 5 to 15 kt. Seas 3 to 4 ft. 

$$

ANZ930-200245-
Hatteras Canyon to Cape Fear between 100 NM and 250 NM offshore-
1040 AM EDT Mon Apr 19 2021

.TODAY...W to SW winds 10 to 20 kt. Seas 4 to 7 ft. Showers and
scattered tstms with vsby 1 nm or less. 
.TONIGHT...W to NW winds 20 to 30 kt. Seas 4 to 7 ft. Scattered
showers and tstms. 
.TUE...N to NE winds 10 to 20 kt, becoming E to NE 5 to 15 kt.
Seas 4 to 7 ft. 
.TUE NIGHT...SE winds 5 to 15 kt, becoming S. Seas 4 to 6 ft.
Scattered showers. Scattered tstms. 
.WED...S to SW winds 15 to 25 kt. Seas 4 to 6 ft. 
.WED NIGHT...W to SW winds 20 to 30 kt, becoming W to NW. Seas
6 to 10 ft. 
.THU...NW winds 15 to 25 kt. Seas 6 to 11 ft. 
.THU NIGHT...W to NW winds 15 to 25 kt. Seas 5 to 9 ft. 
.FRI...NW winds 10 to 20 kt, becoming W. Seas 4 to 8 ft. 
.FRI NIGHT...W winds 10 to 20 kt. Seas 3 to 6 ft. 

$$

ANZ835-200245-
Cape Fear to 31N to 1000 FM-
1040 AM EDT Mon Apr 19 2021

.TODAY...W winds 15 to 25 kt. Seas 3 to 6 ft. Scattered showers.
.TONIGHT...N winds 15 to 25 kt, becoming NE 5 to 15 kt. Seas
4 to 7 ft. 
.TUE...E to SE winds 5 to 15 kt. Seas 3 to 5 ft. Isolated tstms.
.TUE NIGHT...S to SE winds 5 to 15 kt, becoming W to SW. Seas
3 to 4 ft. Scattered showers and tstms. 
.WED...W to SW winds 15 to 25 kt. Seas 3 to 4 ft. 
.WED NIGHT...W to NW winds 20 to 30 kt, becoming N. Seas 5 to
9 ft. 
.THU...N winds 15 to 25 kt, becoming N to NW 5 to 15 kt. Seas
5 to 9 ft. 
.THU NIGHT...W to SW winds 5 to 15 kt, becoming N 10 to 20 kt.
Seas 3 to 6 ft. 
.FRI...N to NE winds 5 to 15 kt, becoming S. Seas 3 to 4 ft. 
.FRI NIGHT...S winds 5 to 15 kt, increasing to 10 to 20 kt. Seas
3 to 4 ft. 

$$

ANZ935-200245-
Cape Fear to 31N east of 1000 FM to 250 NM offshore-
1040 AM EDT Mon Apr 19 2021

.TODAY...SW winds 15 to 25 kt, becoming W 20 to 30 kt. Seas 4 to
8 ft. Showers and scattered tstms with vsby 1 nm or less. 
.TONIGHT...W to NW winds 15 to 25 kt, becoming N to NW 10 to
20 kt. Seas 5 to 7 ft. Scattered showers. 
.TUE...NE winds 10 to 15 kt, becoming E 5 to 10 kt. Seas 4 to
6 ft. 
.TUE NIGHT...SE winds 5 to 15 kt, becoming S to SW 10 to 20 kt.
Seas 4 to 5 ft. Scattered showers and tstms. 
.WED...W to SW winds 15 to 25 kt. Seas 3 to 6 ft. 
.WED NIGHT...W to SW winds 20 to 30 kt. Seas 5 to 9 ft. 
.THU...N winds 15 to 20 kt, diminishing to 5 to 15 kt. Seas 5 to
9 ft. 
.THU NIGHT...N to NW winds 5 to 15 kt. Seas 4 to 7 ft. 
.FRI...NE winds less than 10 kt, becoming S to SE. Seas 3 to
6 ft. 
.FRI NIGHT...S to SW winds 5 to 15 kt, becoming S to SE. Seas
3 to 5 ft. 

$$

.Forecaster Kells. Ocean Prediction Center.
Last Update: Mon, 19-Apr-2021 14:41:42 UTC
Updates: Four times per day

FZNT01 KWBC 191617
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1630 UTC MON APR 19 2021

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

METAREA IV BULLETIN WILL ONLY BE BROADCAST FROM THE INMARSAT 
AOE SATELLITE. PLEASE ENSURE YOUR RECEIVER IS POINTED 
CORRECTLY. 

FOR INFORMATION ON ATLANTIC ICEBERGS SEE INFORMATION FROM NORTH 
ATLANTIC ICE SERVICE AT HTTPS://OCEAN.WEATHER.GOV/ATL_TAB.PHP 
(ALL LOWERCASE).

SECURITE

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

ALL FORECASTS VALID OVER ICE FREE FORECAST WATERS

SYNOPSIS VALID 1200 UTC APR 19. 
24 HOUR FORECAST VALID 1200 UTC APR 20.
48 HOUR FORECAST VALID 1200 UTC APR 21.

.WARNINGS.

...STORM WARNING... 
.LOW 48N45W 989 MB MOVING NW 15 KT. WITHIN 300 NM N AND 480 NM E
QUADRANTS WINDS 35 TO 50 KT. SEAS 18 TO 26 FT. ELSEWHERE WITHIN
480 NM NW...NE...900 NM SE...AND 960 NM SW QUADRANTS WINDS 25 TO
35 KT.  SEAS 8 TO 20 FT IN MIXED SWELL.
.24 HOUR FORECAST LOW 50N50W 982 MB. BETWEEN 300 AND 600 NM
NE...240 AND 540 NM SE...WITHIN 120 NM SW AND WITHIN 300 NM NW
QUADRANTS WINDS 30 TO 45 KT. SEAS 16 TO 24 FT....HIGHEST BETWEEN
300 AND 600 NM NE QUADRANT. ELSEWHERE WITHIN 540 NM NW...780 NM
NE...960 NM SE...AND 540 NM SW QUADRANTS WINDS 20 TO 30 KT. SEAS
8 TO 18 FT IN MIXED SWELL.
.48 HOUR FORECAST LOW 51N41W 986 MB. BETWEEN 420 NM AND 600 NM NW
AND BETWEEN 60 NM AND 180 NM S QUADRANTS WINDS 30 TO 45 KT. SEAS
10 TO 21 FT. ELSEWHERE WITHIN 540 NM SE...420 NM SW AND 720 NM
NW QUADRANTS WINDS 20 TO 30 KT. SEAS 8 TO 16 FT IN MIXED SWELL.

...STORM WARNING...
.24 HOUR FORECAST NEW LOW 54N39W 995 MB. BETWEEN 60 NM AND 240 NM
NE AND BETWEEN 120 NM AND 300 NM NW QUADRANTS WINDS 30 TO 45 KT.
SEAS 18 TO 26 FT. ELSEWHERE WITHIN 360 NM NE...600 NM W AND NW
QUADRANTS WINDS 25 TO 35 KT. SEAS 11 TO 18 FT IN MIXED SWELL.
.48 HOUR FORECAST LOW 57N40W 995 MB. BETWEEN 120 AND 300 NM
W...BETWEEN 120 NM AND 180 NM NW QUADRANTS WINDS 40 TO 50 KT.
SEAS 14 TO 22 FT. ELSEWHERE WITHIN 420 NM N...BETWEEN 300 NM AND
540 NM SW...AND WITHIN 300 NM NW QUADRANTS WINDS 25 TO 35 KT.
SEAS 8 TO 17 FT. IN MIXED SWELL.

...GALE WARNING... 
.LOW 46N57W 995 MB MOVING NE 20 KT. WITHIN 360 NM S AND 240 NM
SW QUADRANTS WINDS 25 TO 35 KT. SEAS 8 TO 12 FT. 
.24 HOUR FORECAST LOW DISSIPATED. CONDITIONS DESCRIBED ABOVE
WITH LOW 50N50W. 

...GALE WARNING... 
.LOW 62N61W 1009 MB MOVING NE 10 KT. WITHIN 60 NM NE AND E OF A
LINE FROM 64N53W TO 62N52W TO 61N50W WINDS 25 TO 35 KT. ELSEWHERE
BETWEEN 120 NM AND 300 NM NE...BETWEEN 180 NM AND 300 NM E...AND
BETWEEN 180 NM AND 360 NM SE...AND WITHIN 360 NM S QUADRANTS
WINDS 20 TO 30 KT.
.24 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DIMINISHED. 

...GALE WARNING... 
.COMPLEX LOW WITH FIRST CENTER 35N74W 1010 MB MOVING NE 15 KT AND
SECOND CENTER 1006 MB 32N76W MOVING NE 25 KT. WITHIN 300 NM
E...180 NM SE...SW...AND 120 NM W OF SECOND CENTER WINDS 20 TO 30
KT. SEAS 11 TO FT.
.12 HOUR FORECAST FIRST CENTER 36N70W 1009 MB AND SECOND CENTER
34N71W 1010 MB.  BETWEEN 180 AND 540 NM SE QUADRANT OF SECOND
CENTER WINDS 25 TO 40 KT. SEAS 8 TO 14 FT.
.24 HOUR FORECAST COMBINED LOW 36N65W 1007 MB. BETWEEN 60 NM AND
180 NM NE AND BETWEEN 60 AND 180 NM W...NW QUADRANTS WINDS 30 TO
40 KT. SEAS 9 TO 14 FT.  ELSEWHERE WITHIN 540 NM SE...420 NM
SW...AND 240 NM NW QUADRANTS WINDS 20 TO 30 KT. SEAS 8 TO 12 
FT.
.48 HOUR FORECAST LOW 39N43W 1004 MB. BETWEEN 60 NM AND 360 NM
SE...120 NM AND 360 NM S...AND WITHIN 300 NM SW QUADRANTS WINDS
30 TO 45 KT. SEAS 9 TO 18 FT. ELSEWHERE FROM 31N TO 41N BETWEEN
35W AND 54W WINDS 25 TO 40 KT. SEAS 8 TO 14 FT.

.SYNOPSIS AND FORECAST.

.LOW E OF AREA NEAR 66N27W 1003 MB MOVING SE 20 KT. WITHIN 300
NM SW QUADRANT AND FROM 58N TO 60N E OF 44W WINDS 20 TO 30 KT. 
SEAS TO 11 FT.
.24 HOUR FORECAST LOW AND CONDITIONS MOVED E OF AREA.

.LIGHT TO MODERATE FREEZING SPRAY N OF 64N E OF GREENLAND AND N
OF 63N W OF GREENLAND. 
.24 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY N OF A LINE
FROM 64N55W TO 66N53W. 
.48 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY N OF A LINE
FROM 63N57W TO 66N54W. 

.DENSE FOG WITH VSBY OCCASIONALLY LESS THAN 1 NM FROM 44N TO 50N

BETWEEN 47W AND 63W...INCLUDING THE GULF OF SAINT LAWRENCE...AND
WITHIN 120 NM N OF A LINE FROM 62N50W TO 62N57W. 
.24 HOUR FORECAST DENSE FOG FROM 46N TO 56N BETWEEN 47W AND
55W...AND N OF A LINE FROM 62N52W TO 63N50W. 
.48 HOUR FORECAST DENSE FOG WITHIN 120 NM SW OF A LINE FROM
47N45W TO 53N51W...AND WITHIN 180 NM NW OF A LINE FROM 53N51W TO
58N38W.

.48 HOUR FORECAST NEW HIGH 35N59W 1024 MB.

.FORECASTER FUTTERMAN. OCEAN PREDICTION CENTER.

NWS NATIONAL HURRICANE CENTER MIAMI FL

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

SYNOPSIS VALID 1200 UTC MON APR 19.
24 HOUR FORECAST VALID 1200 UTC TUE APR 20.
48 HOUR FORECAST VALID 1200 UTC WED APR 21.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.ATLC WITHIN 07N51W TO 07N56W TO 10N59W TO 14N58W TO 15N47W TO
07N51W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN NE TO E SWELL.
.24 HOUR FORECAST WITHIN 10N54W TO 09N57W TO 14N61W TO 16N61W TO
17N53W TO 10N54W WINDS 20 KT OR LESS. SEAS 8 FT IN E SWELL.
.48 HOUR FORECAST WITHIN 15N58W TO 14N60W TO 15N61W TO 17N61W TO
18N59W TO 15N58W WINDS 20 KT OR LESS. SEAS 8 FT IN E SWELL.

.ATLC STATIONARY FRONT FROM 31N80W TO 29N81W. WITHIN 30N74W TO 
29N76W TO 30N77W TO 31N77W TO 31N73W TO 30N74W SW WINDS 20 TO 25 
KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST COLD FRONT FROM 31N70W TO 28N75W THEN
STATIONARY TO 29N81W. WITHIN 31N66W TO 30.5N68.5W TO 31N69W TO 
31N64.5W TO 31N66W SW TO W WINDS 20 TO 25 KT. SEAS TO 8 FT.
.30 HOUR FORECAST COLD FRONT FROM 31N68W TO 28N72W THEN
DISSIPATING
STATIONARY TO 29N81W. WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.GULF OF MEXICO STATIONARY FRONT FROM 28N82W TO 25N92W TO 19N96W.
WITHIN 19N94W TO 19N96W TO 20N97W TO 22N97W TO 22N94W TO
19N94W...
INCLUDING WITHIN 60 NM OF VERACRUZ...NW TO N WINDS 20 TO 25 KT. 
SEAS 8 TO 10 FT.
.12 HOUR FORECAST WEAKENING STATIONARY FRONT FROM 27N82W TO
19N94W. WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.CARIBBEAN WITHIN 11N67W TO 12N72W TO 13N77W TO 16N75W TO 
14N68W TO 11N67W E WINDS 20 TO 25 KT. SEAS 8 FT.
.12 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST WITHIN 11N70W TO 12N76W TO 16N80W TO 16N73W TO
14N70W TO 11N70W E WINDS 20 TO 25 KT. SEAS 8 TO 10 FT.
.48 HOUR FORECAST WITHIN 11N71W TO 11N78W TO 14N77W TO 14N74W TO
13N71W TO 11N71W E WINDS 20 TO 25 KT. SEAS 8 TO 9 FT.

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


.FORECASTER AGUIRRE. NATIONAL HURRICANE CENTER.

$$
Last Update: Mon, 19-Apr-2021 16:18:23 UTC
Updates: Four times per day