Atlantic Text Briefing Package

[Printable Version]

AGNT40 KWNM 241410
MIMATN

Marine Weather Discussion for N Atlantic Ocean
NWS Ocean Prediction Center Washington DC
1010 AM EDT Tue Apr 24 2018

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

Impressive visible satellite images from Goes-16 this morning 
reveals robust storm system centered inland over northern GA, 
pulling its associated strong frontal boundaries north into OPC 
waters. Poleward of the warm front, widespread E-SE onshore gales
continue, with several buoys reporting sustained winds near 30 
kt (8-min averages) with gusts nearing 40 kt. Unfortunately, 
NCEP/OPC still without timely ASCAT wind retrievals at this time.
Widespread convection also continues across OPC waters, mostly 
focused along the cold front over ANZ835/833. Gusts to storm 
force remain possible in or near any thunderstorms as the front 
slowly lifts N and NE today.

Overall, the ongoing forecast inherited from the night shift 
looks to be in excellent shape with respect to timing, strength, 
and coverage of hazards. See below for previous forecast
discussion and model preferences. Mid-upper low finally kicks NE
Wed into Wed night, with gales ending southwest to northeast by 
12z Thu. Will re-evaluate entire forecast with upcoming 12z model
suite and available ensembles. 

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

The GOES-E infrared satellite imagery shows showers along a 
frontal boundary along the SE coast this morning, while the 
lightning density product shows some embedded tstms in the 
convection over the srn NT2 offshore waters. Current surface 
observations show winds up to 40 kt along the SE coast, while the
Ascat wind retrievals from around 0200 UTC last night indicated 
about the same with the highest winds in the convection. The 00Z 
GFS winds are initialized within 5 kt of the current data this 
morning, and the model indicates that the front will slowly move 
E across the area today through Wed as the associated low center 
moves NE along the coast. The 00Z ECMWF is in good agreement with
the GFS on the timing and track of the low and front, and 
indicates gales as well, though slightly weaker than the GFS. 
The GFS is showing a few areas close to storm force over NT2, 
mainly over the Gulf Stream later today. The models are all 
showing a strong low level jet setting up ahead of the front, 
though the GFS is by far the strongest solution and shows the 
strongest mixed layer winds in model soundings with winds on the 
cusp of storm force over the central and srn NT2 later today. 
However, even the higher resolution regional models such as the
ARW and NMM are capping sustained winds near 45 kt, and the 00Z 
GFS has trended slightly weaker from the previous run. As a 
result, confidence with storm force is just below average at this
time with the bulk of the guidance keeping sustained winds below
storm and the trends in the GFS signalling a weaker solution. 
However, would not rule out the possibility of higher gusts with 
the current convective activity ongoing. For the next forecast, 
am planning on starting out with the 00Z GFS 10m winds, favoring 
the first sigma winds in unstable areas while capping them at 45 
kt. Will also continue the mention of higher gusts possible in 
some of the southern zones. Also planning on maintaining previous
gale headlines with above average confidence, but will make some
adjustments based on the overall trends noted in the 00Z 
guidance.

The 00Z models then indicate a weak high pres ridge will pass
quickly across the area Thu night into Fri, before a weaker low
pressure system moves through the region later Fri into Sat. 
There is a fair amount of spread in the model guidance with the 
overall track and intensity of this next system, and the 00Z GFS 
has trended a little faster from previous runs. The 00Z ECMWF/GEM
are both to the SE of the GFS, while the 00Z UKMET is much 
weaker. The 00Z ensemble guidance is showing a slower signal 
than indicated by the GFS, and is near the previous run which is 
also close to continuity. Confidence is currently low in the 
guidance as a result of the large spread, so planning on using a
solution that does not diverge much from the previous forecast 
since no clear trend is evident at this time. For the wind grids,
am planning on using the 00Z GFS 10m winds exclusively starting 
from 12Z Fri, while time shifting it 6 hour slower to stay near 
the previous forecast.

.SEAS...Sentinel altimeter data from 03Z indicated wave heights
to 21 ft off the SE coast, with the highest near the
aforementioned convective activity. The 00Z ECMWF WAM is 
initialized much closer to the data than the 00Z Wavewatch, and 
builds seas higher than the Wavewatch as the current system moves
NE across the waters. For the wave heights, am planning on using
a 2:1 blend of the OOZ ECWMF WAM with the 00Z Wavewatch into 12Z
Fri, while boosting near the highest winds as they progress NE 
in the forecast. Will then transition to the 00Z Wavewatch beyond
that point to match the preferred 00Z GFS, but will employ same 
time shift as used with the winds.

.EXTRATROPICAL STORM SURGE GUIDANCE...The 00Z ESTOFS is showing a
higher positive surge along the SE coast today with values near 2
ft in the strong SE flow. The models then indicate the surge will
continue N along the coast Wed into Thu with values just under a
foot over most locations N of Cape Hatteras. The guidance seems 
reasonable with the expected winds along the coast.


.WARNINGS...Preliminary.

.NT1 New England Waters...
.ANZ810...South of New England...
     Gale Wednesday into Wednesday night. 
.ANZ815...South of Long Island...
     Gale Wednesday.

.NT2 Mid-Atlantic Waters...
.ANZ915...Hudson Canyon to the Great South Channel...
     Gale Wednesday into Wednesday night. 
.ANZ920...Baltimore Canyon to the Great South Channel...
     Gale tonight into Wednesday. 
.ANZ905...The Great South Channel to the Hague Line...
     Gale Wednesday into Wednesday night. 
     Gale Possible Thursday.
.ANZ910...East of the Great South Channel and south of 39N...
     Gale Wednesday into Wednesday night. 
.ANZ825...Inner Waters from Baltimore Canyon to Cape Charles Light...
     Gale tonight.
.ANZ828...Inner Waters from Cape Charles Light to Currituck Beach Light...
     Gale today into tonight. 
.ANZ925...Outer Waters from Baltimore Canyon to Hatteras Canyon...
     Gale today into Wednesday. 
.ANZ830...Inner Waters from Currituck Beach Light to Cape Hatteras...
     Gale today into tonight. 
.ANZ833...Inner Waters from Cape Hatteras to Cape Fear...
     Gale today into tonight. 
.ANZ930...Outer Waters from Hatteras Canyon to Cape Fear...
     Gale today into tonight. 
.ANZ835...Inner Waters from Cape Fear to 31N...
     Gale today.
.ANZ935...Outer Waters from Cape Fear to 31N...
     Gale today into tonight. 

$$

.Forecaster Collins/Kells. Ocean Prediction Center.
Last Update:14:11Z, 24 April 2018
Updates: Four times per day

FZNT21 KWBC 241423
OFFNT1

Offshore Waters Forecast
NWS Ocean Prediction Center Washington DC
1023 AM EDT Tue Apr 24 2018

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.

ANZ898-250230-
1023 AM EDT Tue Apr 24 2018

.SYNOPSIS FOR NEW ENGLAND WATERS...High pressure will shift E of
the waters today. Low pressure will slowly approach from the SW 
tonight into Wed, accelerate N along the coast Wed night, then 
move well inland into Maine Thu. The low will pull a warm front 
through the region Wed night into Thu, then pull a cold front 
across the waters Thu. A low pressure trough will pass E through
the waters later Thu and Thu night before weak high pressure 
quickly moves E over the area Fri. Weak low pressure will 
approach from the SW Fri night, and move NE over the area Fri 
night into Sat as another cold front approaches the region from 
the NW. The cold front will move SE over the area Sat night.

$$

ANZ800-250230-
Gulf of Maine to the Hague Line-
1023 AM EDT Tue Apr 24 2018

.TODAY...SW winds 10 to 15 kt, becoming S to SW 10 to 20 kt.
Seas 2 to 4 ft. 
.TONIGHT...S to SW winds 10 to 20 kt. Seas 3 to 5 ft. Areas of
fog with VSBY 1 nm or less. 
.WED...S to SE winds 15 to 25 kt. Seas 3 to 6 ft. 
.WED NIGHT...SE winds 20 to 30 kt, becoming S 15 to 25 kt. Seas
7 to 12 ft. Rain. Areas of fog. VSBY 1 NM or less. 
.THU...S to SW winds 10 to 20 kt, becoming W. Seas 7 to 12 ft. 
.THU NIGHT...W winds 10 to 20 kt, diminishing to 5 to 15 kt.
Seas 6 to 10 ft. 
.FRI...S to SW winds 5 to 10 kt. Seas 5 to 8 ft. 
.FRI NIGHT...S winds 10 to 15 kt, becoming SE 20 to 30 kt. Seas
4 to 6 ft. 
.SAT...S winds 20 to 30 kt, becoming S to SW 10 to 20 kt. Seas
4 to 6 ft. 
.SAT NIGHT...S to SW winds 10 to 20 kt, becoming W to SW. Seas
4 to 6 ft. 

$$

ANZ805-250230-
Georges Bank between Cape Cod and 68W north of 1000 fm-
1023 AM EDT Tue Apr 24 2018

.TODAY...S to SW winds 5 to 15 kt. Seas 2 to 3 ft. Areas of fog
with VSBY 1 nm or less. 
.TONIGHT...S to SE winds 10 to 15 kt, becoming SE 10 to 20 kt.
Seas 3 to 5 ft. Areas of fog with VSBY 1 nm or less. 
.WED...SE winds 15 to 20 kt, increasing to 20 to 30 kt. Seas
5 to 8 ft, building to 9 to 14 ft. Rain with VSBY 1 nm or less. 
.WED NIGHT...S to SE winds 20 to 30 kt, becoming S 10 to 20 kt.
Seas 9 to 16 ft. Rain and areas of fog with VSBY 1 nm or less. 
.THU...W winds 5 to 15 kt. Seas 8 to 13 ft. 
.THU NIGHT...W winds 10 to 15 kt, becoming W to SW. Seas 6 to
10 ft. 
.FRI...S winds 5 to 10 kt. Seas 5 to 7 ft. 
.FRI NIGHT...S to SE winds 10 to 15 kt, increasing to 15 to
25 kt. Seas 5 to 6 ft. 
.SAT...S winds 10 to 20 kt, becoming W to SW 5 to 15 kt. Seas
5 to 6 ft. 
.SAT NIGHT...W to SW winds 10 to 20 kt. Seas 4 to 6 ft. 

$$

ANZ900-250230-
Georges Bank between 68W and the Hague Line-
1023 AM EDT Tue Apr 24 2018

.TODAY...S to SW winds 5 to 10 kt, becoming 5 to 15 kt. Seas
2 to 3 ft. Areas of fog with VSBY 1 nm or less. 
.TONIGHT...S to SE winds 5 to 15 kt, becoming SE 10 to 20 kt.
Seas 2 to 4 ft. 
.WED...SE winds 15 to 25 kt. Seas 7 to 11 ft. 
.WED NIGHT...S to SE winds 20 to 30 kt. Seas 9 to 15 ft. Rain
with VSBY 1 nm or less. 
.THU...S to SW winds 15 to 25 kt, becoming W 10 to 20 kt. Seas
9 to 15 ft. 
.THU NIGHT...W to SW winds 5 to 15 kt. Seas 7 to 11 ft. 
.FRI...S to SW winds 5 to 10 kt. Seas 5 to 7 ft. 
.FRI NIGHT...S to SE winds 10 to 15 kt, increasing to 15 to
20 kt. Seas 5 to 6 ft. 
.SAT...S to SW winds 15 to 20 kt. Seas 5 to 7 ft. 
.SAT NIGHT...W to SW winds 10 to 20 kt. Seas 5 to 6 ft. 

$$

ANZ810-250230-
South of New England between the Great South Channel and Montauk
Point to 1000 fm-
1023 AM EDT Tue Apr 24 2018

...GALE WARNING...

.TODAY...S to SE winds 5 to 10 kt, becoming SE 5 to 15 kt. Seas
2 to 3 ft. 
.TONIGHT...E to SE winds 10 to 15 kt, becoming SE 15 to 20 kt.
Seas 5 to 8 ft. 
.WED...SE winds 20 to 30 kt, becoming S to SE 25 to 35 kt. Seas
10 to 17 ft. Rain. Areas of fog. VSBY 1 NM or less. 
.WED NIGHT...S winds 25 to 35 kt, becoming S to SW 5 to 15 kt.
Seas 10 to 17 ft. Scattered showers and TSTMs. Areas of fog.
Rain. VSBY 1 NM or less. 
.THU...W to NW winds 10 to 20 kt, becoming W 10 to 15 kt. Seas
8 to 12 ft. 
.THU NIGHT...W winds 10 to 15 kt, becoming W to SW 5 to 10 kt.
Seas 6 to 9 ft. 
.FRI...S winds 5 to 10 kt, becoming SE. Seas 5 to 6 ft. 
.FRI NIGHT...SE winds 10 to 20 kt, becoming S. Seas 5 to 6 ft. 
.SAT...S to SW winds 10 to 20 kt, becoming W 5 to 15 kt. Seas
5 to 6 ft. 
.SAT NIGHT...W to SW winds 10 to 20 kt. Seas 5 to 6 ft. 

$$

ANZ815-250230-
South of Long Island between Montauk Point and Sandy Hook to
1000 fm-
1023 AM EDT Tue Apr 24 2018

...GALE WARNING...

.TODAY...SE winds 5 to 15 kt, becoming E 10 to 15 kt. Seas 2 to
4 ft. 
.TONIGHT...E winds 10 to 15 kt, increasing to 15 to 20 kt. Seas
5 to 9 ft. 
.WED...SE winds 15 to 25 kt, increasing to 25 to 35 kt. Seas
10 to 17 ft. Chance of rain, then areas of fog. VSBY 1 NM or
less. 
.WED NIGHT...S to SW winds 5 to 15 kt, becoming W to NW 10 to
20 kt. Seas 9 to 16 ft. Areas of fog with VSBY 1 nm or less. 
.THU...NW winds 10 to 20 kt, becoming W 5 to 15 kt. Seas 6 to
10 ft. 
.THU NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt.
Seas 5 to 8 ft. 
.FRI...S winds 5 to 10 kt, becoming SE. Seas 4 to 6 ft. 
.FRI NIGHT...SE winds 10 to 20 kt, becoming S to SW. Seas 4 to
6 ft. 
.SAT...W winds 5 to 15 kt. Seas 4 to 6 ft. 
.SAT NIGHT...W to SW winds 10 to 20 kt. Seas 4 to 5 ft. 

$$

.Forecaster Collins. Ocean Prediction Center.
Last Update:14:24Z, 24 April 2018
Updates: Four times per day

FZNT22 KWBC 241440
OFFNT2

Offshore Waters Forecast
NWS Ocean Prediction Center Washington DC
1040 AM EDT Tue Apr 24 2018

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.

ANZ899-250230-
1040 AM EDT Tue Apr 24 2018

.SYNOPSIS FOR MID ATLC WATERS...Low pressure inland across
northern GA will slowly drift NE today into tonight, before
turning N and accelerating along the coast Wed and Wed night. 
The low will pull a series of fronts across the region today
through Wed night. The low will clear well N of the waters by 
Thu. A low pressure trough will move E across the region Wed 
night and Thu. Another low pressure will approach the SE coast
Thu night, lift N along the coast Fri and Fri night, then clear 
well N of the area Sat. The low will pull a slow moving cold 
front through the region Fri into Sat. The front will clear E of
the waters Sat night as high pressure builds SE towards the coast 
behind the departing front. 

$$

ANZ820-250230-
Hudson Canyon to Baltimore Canyon to 1000 fm-
1040 AM EDT Tue Apr 24 2018

.TODAY...E to SE winds 10 to 15 kt, becoming 10 to 20 kt. Seas 4 to
7 ft.
.TONIGHT...E to SE winds 15 to 20 kt, becoming SE 20 to 30 kt. Seas
building to 9 to 15 ft. Rain with VSBY 1 nm or less.
.WED...SE winds 15 to 25 kt, becoming S to SW 10 to 20 kt. Seas 9 to
16 ft. Chance of rain and areas of fog with VSBY 1 nm or less.
.WED NIGHT...Winds veering to W to NW 5 to 15 kt, then becoming NW
10 to 20 kt. Seas subsiding to 8 to 14 ft. Areas of fog with VSBY 1
nm or less.
.THU...NW winds 10 to 20 kt, becoming W to SW 5 to 15 kt. Seas
subsiding to 6 to 10 ft.
.THU NIGHT...SW winds 5 to 15 kt, becoming S to SW 5 to 10 kt. Seas
subsiding to 4 to 7 ft.
.FRI...SE winds 5 to 15 kt, increasing to 10 to 20 kt. Seas 4 to 5
ft.
.FRI NIGHT...S to SE winds 10 to 20 kt, becoming S to SW. Seas 4 to
5 ft.
.SAT...Winds veering to NW 5 to 15 kt, then becoming W 5 to 10 kt.
Seas 3 to 5 ft.
.SAT NIGHT...SW winds increasing to 10 to 20 kt. Seas 3 to 5 ft.

$$

ANZ915-250230-
Between 1000 fm and 38.5N west of 69W-
1040 AM EDT Tue Apr 24 2018

...GALE WARNING...

.TODAY...E winds 5 to 15 kt, becoming SE 15 to 25 kt. Seas 3 to 6
ft.
.TONIGHT...SE winds 20 to 30 kt. Seas building to 7 to 12 ft.
.WED...S to SE winds 25 to 35 kt. Seas building to 12 to 20 ft. Rain
with VSBY 1 nm or less.
.WED NIGHT...S to SE winds 25 to 35 kt, becoming W to NW 10 to 20
kt. Seas subsiding to 11 to 18 ft. Scattered showers and TSTMs.
Areas of fog with VSBY less than 1 nm.
.THU...W to NW winds 10 to 20 kt, becoming W 10 to 15 kt. Seas
subsiding to 7 to 12 ft.
.THU NIGHT...W winds 5 to 15 kt, becoming S to SW. Seas subsiding to
5 to 9 ft.
.FRI...S winds 5 to 10 kt, becoming SE 5 to 15 kt. Seas subsiding to
4 to 6 ft.
.FRI NIGHT...S to SE winds increasing to 15 to 25 kt. Seas 4 to 7
ft.
.SAT...Winds veering to W to SW 15 to 25 kt, then becoming W 10 to
15 kt. Seas 5 to 7 ft.
.SAT NIGHT...W winds 10 to 15 kt, becoming W to SW 10 to 20 kt. Seas
4 to 6 ft.

$$

ANZ920-250230-
Baltimore Canyon to 69W east of 1000 fm and south of 38.5N to
250 nm offshore-
1040 AM EDT Tue Apr 24 2018

...GALE WARNING...

.TODAY...E winds 10 to 20 kt, becoming SE 20 to 30 kt. Seas 5 to 9
ft.
.TONIGHT...SE winds 25 to 35 kt. Seas building to 10 to 17 ft.
.WED...S to SE winds 30 to 40 kt. Seas building to 13 to 22 ft. Rain
with VSBY 1 nm or less.
.WED NIGHT...S to SE winds diminishing to 20 to 30 kt, then becoming
W to SW 10 to 20 kt. Seas subsiding to 11 to 18 ft. Scattered
showers and TSTMs with VSBY 1 nm or less.
.THU...W to NW winds 10 to 20 kt, diminishing to 5 to 15 kt. Seas
subsiding to 6 to 11 ft.
.THU NIGHT...W winds 5 to 10 kt, becoming S. Seas subsiding to 5 to
8 ft.
.FRI...S winds 5 to 15 kt, increasing to 10 to 20 kt. Seas subsiding
to 4 to 6 ft.
.FRI NIGHT...S winds 15 to 25 kt. Seas 4 to 8 ft.
.SAT...SW winds 15 to 25 kt, becoming W 10 to 15 kt. Seas 4 to 8 ft.
.SAT NIGHT...W winds 5 to 15 kt. Seas 4 to 6 ft.

$$

ANZ905-250230-
East of 69W to the Hague Line between 1000 fm and 39N-
1040 AM EDT Tue Apr 24 2018

...GALE WARNING...

.TODAY...Variable winds less than 10 kt, becoming S to SE. Seas 2 to
3 ft.
.TONIGHT...SE winds increasing to 15 to 25 kt. Seas building to 4 to
7 ft.
.WED...SE winds 20 to 30 kt, becoming S to SE 25 to 35 kt. Seas
building to 10 to 16 ft.
.WED NIGHT...S winds 25 to 35 kt. Seas 10 to 17 ft. Rain with VSBY 1
nm or less.
.THU...S winds 25 to 35 kt, becoming W 15 to 20 kt. Seas 10 to 17
ft.
.THU NIGHT...W to SW winds diminishing to 5 to 15 kt. Seas subsiding
to 6 to 11 ft.
.FRI...S to SW winds 5 to 10 kt. Seas subsiding to 5 to 7 ft.
.FRI NIGHT...SE winds 5 to 15 kt, becoming S 15 to 20 kt. Seas 5 to
6 ft.
.SAT...S to SW winds 10 to 20 kt. Seas 5 to 7 ft.
.SAT NIGHT...Winds veering to W 10 to 20 kt, then becoming 10 to 15
kt. Seas 5 to 7 ft.

$$

ANZ910-250230-
East of 69W and south of 39N to 250 nm offshore-
1040 AM EDT Tue Apr 24 2018

...GALE WARNING...

.TODAY...E winds 5 to 15 kt, becoming E to SE 10 to 20 kt. Seas 3 to
6 ft.
.TONIGHT...SE winds increasing to 20 to 30 kt. Seas building to 7 to
12 ft.
.WED...SE winds 25 to 35 kt, becoming S. Seas building to 11 to 19
ft. Chance of rain.
.WED NIGHT...S to SE winds 25 to 35 kt. Seas 11 to 18 ft. Rain with
VSBY 1 nm or less.
.THU...Winds diminishing to W to SW 10 to 20 kt. Seas subsiding to 9
to 16 ft.
.THU NIGHT...W winds 5 to 15 kt, becoming S to SW. Seas subsiding to
6 to 9 ft.
.FRI...S winds 5 to 10 kt, becoming 5 to 15 kt. Seas subsiding to 5
to 6 ft.
.FRI NIGHT...S winds 10 to 20 kt. Seas 5 to 7 ft.
.SAT...S to SW winds 15 to 25 kt. Seas 5 to 7 ft.
.SAT NIGHT...Winds becoming W 10 to 15 kt, then diminishing to 5 to
10 kt. Seas 5 to 6 ft.

$$

ANZ825-250230-
Baltimore Canyon to Cape Charles Light to 100 nm offshore-
1040 AM EDT Tue Apr 24 2018

...GALE WARNING...

.TODAY...E to SE winds 15 to 25 kt. Seas 7 to 12 ft.
.TONIGHT...SE winds 20 to 30 kt, increasing to 25 to 35 kt. Seas
building to 10 to 18 ft. Rain. Areas of fog with VSBY 1 nm or less.
.WED...S to SE winds diminishing to 10 to 20 kt, then becoming SW
less than 10 kt. Seas 10 to 16 ft. Chance of rain. Areas of fog with
VSBY 1 nm or less.
.WED NIGHT...W to NW winds 5 to 15 kt, becoming NW 10 to 20 kt. Seas
subsiding to 6 to 11 ft. Areas of fog with VSBY 1 nm or less.
.THU...N to NW winds 10 to 20 kt, becoming W to NW less than 10 kt.
Seas subsiding to 4 to 8 ft.
.THU NIGHT...S to SE winds less than 10 kt. Seas subsiding to 3 to 6
ft.
.FRI...SE winds 5 to 15 kt, becoming S to SE 10 to 20 kt. Seas 4 to
5 ft.
.FRI NIGHT...S winds 10 to 20 kt, becoming W to SW. Seas 4 to 6 ft.
.SAT...Winds veering to NW 5 to 15 kt, then becoming W to NW 5 to 10
kt. Seas 3 to 5 ft.
.SAT NIGHT...S to SW winds 5 to 15 kt. Seas 3 to 4 ft.

$$

ANZ828-250230-
Cape Charles Light to Currituck Beach Light to 100 nm offshore-
1040 AM EDT Tue Apr 24 2018

...GALE WARNING...

.TODAY...E to SE winds 20 to 30 kt, becoming SE 25 to 35 kt. Seas 9
to 15 ft.
.TONIGHT...S to SE winds 25 to 35 kt. Seas building to 12 to 20 ft.
Scattered showers and TSTMs. VSBY 1 nm or less.
.WED...S to SW winds diminishing to 5 to 15 kt. Seas subsiding to 8
to 14 ft. Areas of fog with VSBY 1 nm or less.
.WED NIGHT...W to SW winds 5 to 15 kt, becoming NW 10 to 15 kt. Seas
subsiding to 5 to 9 ft. Areas of fog with VSBY 1 nm or less.
.THU...N winds 10 to 15 kt, diminishing to less than 10 kt. Seas
subsiding to 4 to 7 ft.
.THU NIGHT...SE winds less than 10 kt, increasing to 5 to 15 kt.
Seas subsiding to 3 to 5 ft.
.FRI...S to SE winds 10 to 20 kt. Seas 4 to 6 ft.
.FRI NIGHT...S winds 15 to 25 kt, becoming SW 10 to 20 kt. Seas 4 to
6 ft.
.SAT...Winds veering to W to NW 5 to 15 kt, then becoming NW. Seas 3
to 6 ft.
.SAT NIGHT...Variable winds less than 10 kt, becoming S. Seas
subsiding to 2 to 4 ft.

$$

ANZ925-250230-
Baltimore Canyon to Hatteras Canyon between 100 nm and 250 nm
offshore-
1040 AM EDT Tue Apr 24 2018

...GALE WARNING...

.TODAY...E to SE winds 20 to 30 kt, becoming SE 25 to 35 kt. Seas 8
to 14 ft.
.TONIGHT...SE winds increasing to 35 to 45 kt. Seas building to 12
to 21 ft. Rain with VSBY 1 nm or less.
.WED...S to SE winds diminishing to 25 to 35 kt, then becoming S 20
to 30 kt. Seas 12 to 21 ft. Scattered showers and TSTMs. VSBY 1 nm
or less.
.WED NIGHT...Winds diminishing to W to SW 10 to 20 kt. Seas
subsiding to 8 to 12 ft. Scattered showers and TSTMs with VSBY 1 nm
or less.
.THU...W to NW winds 10 to 20 kt, becoming NW 5 to 15 kt. Seas
subsiding to 6 to 9 ft.
.THU NIGHT...Variable winds less than 10 kt, becoming S to SE. Seas
subsiding to 4 to 6 ft.
.FRI...S winds increasing to 10 to 20 kt. Seas 4 to 6 ft.
.FRI NIGHT...S to SW winds 15 to 25 kt. Seas 5 to 7 ft.
.SAT...SW winds 10 to 20 kt, becoming W to NW 5 to 15 kt. Seas 4 to
7 ft.
.SAT NIGHT...W to NW winds 5 to 15 kt, becoming variable. Seas
subsiding to 3 to 5 ft.

$$

ANZ830-250230-
Currituck Beach Light to Cape Hatteras to 100 nm offshore-
1040 AM EDT Tue Apr 24 2018

...GALE WARNING...

.TODAY...SE winds 20 to 30 kt, increasing to 35 to 45 kt. Seas 12 to
19 ft.
.TONIGHT...SE winds 30 to 40 kt, becoming S 15 to 25 kt. Seas 12 to
21 ft. Scattered showers and TSTMs with VSBY 1 nm or less.
.WED...S to SW winds diminishing to 10 to 15 kt. Seas subsiding to 7
to 12 ft.
.WED NIGHT...W to SW winds 10 to 20 kt, becoming NW 10 to 15 kt.
Seas subsiding to 6 to 9 ft. Scattered showers and TSTMs.
.THU...N winds 5 to 15 kt, becoming N to NE. Seas subsiding to 5 to
7 ft.
.THU NIGHT...E to SE winds less than 10 kt, becoming S to SE. Seas
subsiding to 4 to 5 ft.
.FRI...S winds increasing to 10 to 20 kt. Seas 4 to 6 ft.
.FRI NIGHT...S to SW winds 15 to 25 kt. Seas 4 to 6 ft.
.SAT...Winds veering to W to NW 10 to 20 kt, then becoming N less
than 10 kt. Seas 3 to 6 ft.
.SAT NIGHT...N winds less than 10 kt, becoming NE. Seas 3 to 4 ft.

$$

ANZ833-250230-
Cape Hatteras to Cape Fear to 100 nm offshore-
1040 AM EDT Tue Apr 24 2018

...GALE WARNING...

.TODAY...SE winds 35 to 45 kt. Seas 9 to 15 ft, building to 12 to 21
ft. Showers and scattered TSTMs. Winds and seas possibly higher in
and near TSTMs.
.TONIGHT...SE winds diminishing to 25 to 35 kt, then becoming SW 10
to 20 kt. Seas 13 to 21 ft, subsiding to 8 to 14 ft. Scattered
showers and TSTMs.
.WED...SW winds 10 to 15 kt, becoming 10 to 20 kt. Seas subsiding to
6 to 11 ft.
.WED NIGHT...W winds 10 to 20 kt, becoming N to NW 5 to 15 kt. Seas
subsiding to 5 to 9 ft.
.THU...N winds 5 to 15 kt, becoming E to NE. Seas subsiding to 4 to
7 ft.
.THU NIGHT...E to SE winds 5 to 15 kt, becoming S to SE 10 to 20 kt.
Seas 3 to 6 ft.
.FRI...S to SW winds 15 to 25 kt. Seas 4 to 6 ft.
.FRI NIGHT...SW winds 10 to 20 kt. Seas 4 to 6 ft.
.SAT...W winds 5 to 15 kt, becoming NE. Seas 3 to 5 ft.
.SAT NIGHT...NE winds 5 to 15 kt, diminishing to less than 10 kt.
Seas 3 to 4 ft.

$$

ANZ930-250230-
Hatteras Canyon to Cape Fear between 100 nm and 250 nm offshore-
1040 AM EDT Tue Apr 24 2018

...GALE WARNING...

.TODAY...E to SE winds 35 to 45 kt. Seas 11 to 19 ft. Chance of
showers and TSTMs. Winds and seas possibly higher in and near 
TSTMs.
.TONIGHT...SE winds 35 to 45 kt, becoming S 30 to 40 kt. Seas 11 to
19 ft. Scattered showers and TSTMs with VSBY 1 nm or less.
.WED...SW winds diminishing to 10 to 20 kt. Seas subsiding to 8 to
13 ft. Scattered showers and TSTMs with VSBY 1 nm or less.
.WED NIGHT...W winds 10 to 20 kt. Seas subsiding to 6 to 10 ft.
Areas of fog with VSBY 1 nm or less.
.THU...W winds 5 to 15 kt, becoming variable. Seas subsiding to 5 to
7 ft.
.THU NIGHT...Variable winds 5 to 15 kt, becoming S 10 to 20 kt. Seas
subsiding to 4 to 5 ft.
.FRI...S winds 15 to 20 kt. Seas 4 to 6 ft.
.FRI NIGHT...S winds 15 to 25 kt, becoming SW 10 to 20 kt. Seas 4 to
7 ft.
.SAT...SW winds 10 to 20 kt, becoming W to SW 5 to 15 kt. Seas 4 to
6 ft.
.SAT NIGHT...S to SW winds less than 10 kt, becoming variable. Seas
4 to 5 ft.

$$

ANZ835-250230-
Cape Fear to 31N to 1000 fm-
1040 AM EDT Tue Apr 24 2018

...GALE WARNING...

.TODAY...S to SE winds 35 to 45 kt, becoming S 20 to 30 kt. Seas 13
to 21 ft. Showers and TSTMs with VSBY 1 nm or less. Winds and 
seas possibly higher in and near TSTMs.
.TONIGHT...Winds diminishing to W to SW 10 to 20 kt. Seas subsiding
to 8 to 13 ft.
.WED...W winds 10 to 20 kt. Seas subsiding to 5 to 9 ft.
.WED NIGHT...W winds 10 to 20 kt, becoming W to NW 5 to 15 kt. Seas
4 to 8 ft.
.THU...N to NE winds less than 10 kt, becoming S to SE. Seas
subsiding to 3 to 6 ft.
.THU NIGHT...S winds increasing to 15 to 25 kt. Seas 4 to 7 ft.
.FRI...Winds veering to W to SW 15 to 25 kt. Seas 4 to 7 ft.
.FRI NIGHT...SW winds 10 to 20 kt. Seas 3 to 6 ft.
.SAT...W to SW winds 10 to 20 kt, diminishing to 5 to 15 kt. Seas 3
to 5 ft.
.SAT NIGHT...W to NW winds 5 to 15 kt, becoming N to NW. Seas 2 to 4
ft.

$$

ANZ935-250230-
Cape Fear to 31N east of 1000 fm to 250 nm offshore-
1040 AM EDT Tue Apr 24 2018

...GALE WARNING...

.TODAY...SE winds 35 to 45 kt. Seas 11 to 19 ft. Scattered showers
and TSTMs.
.TONIGHT...S winds diminishing to 25 to 35 kt, then becoming S 
to SW 15 to 25 kt. Seas subsiding to 8 to 14 ft. Scattered showers
and TSTMs with VSBY 1 nm or less.
.WED...S to SW winds diminishing to 10 to 15 kt, then becoming W 15
to 20 kt. Seas subsiding to 6 to 9 ft. Scattered showers and TSTMs
with VSBY 1 nm or less.
.WED NIGHT...W winds 10 to 20 kt. Seas 5 to 8 ft.
.THU...W to SW winds 5 to 15 kt. Seas subsiding to 4 to 6 ft.
.THU NIGHT...Winds increasing to S 15 to 25 kt. Seas 4 to 6 ft.
.FRI...S winds 15 to 25 kt. Seas 4 to 7 ft.
.FRI NIGHT...SW winds 10 to 20 kt. Seas 4 to 6 ft.
.SAT...SW winds 5 to 15 kt. Seas 4 to 5 ft.
.SAT NIGHT...W to SW winds 5 to 15 kt, becoming NW. Seas 3 to 5 ft.

$$

.Forecaster Collins. Ocean Prediction Center.
Last Update:14:41Z, 24 April 2018
Updates: Four times per day

FZNT01 KWBC 241549
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV 
NWS OCEAN PREDICTION CENTER WASHINGTON DC 
1630 UTC TUE APR 24 2018 

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

SEE ANNOUNCEMENT OF PLANNED INMARSAT I-3 TO I-4 MIGRATION 
IN 2018 AT OCEAN.WEATHER.GOV/GMDSS_NOTICE.PHP (LOWERCASE). 

ONLY YOU KNOW THE WEATHER AT YOUR POSITION. REPORT IT TO THE 
NATIONAL WEATHER SERVICE. EMAIL US AT 
VOSOPS@NOAA.GOV(LOWERCASE). 

FOR INFORMATION ON ATLANTIC ICEBERGS SEE INFORMATION FROM NORTH 
AMERICAN ICE SERVICE AT HTTPS://OCEAN.WEATHER.GOV/ATL_TAB.SHTML 

SECURITE 

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

SYNOPSIS VALID 1200 UTC APR 24. 
24 HOUR FORECAST VALID 1200 UTC APR 25. 
48 HOUR FORECAST VALID 1200 UTC APR 26. 

.WARNINGS. 

...GALE WARNING... 
.OVER FORECAST WATERS FROM 31N TO 36N BETWEEN 72W AND 78W AREA 
OF S TO SE WINDS 25 TO 40 KT. SEAS 10 TO 21 FT. 
.24 HOUR FORECAST FROM 31N TO 40N BETWEEN 65W AND 74W AREA OF S 
TO SE WINDS 25 TO 40 KT. SEAS 10 TO 22 FT. 
.48 HOUR FORECAST FROM 34N TO 45N BETWEEN 58W AND 68W AREA OF S 
TO SE WINDS 25 TO 40 KT. SEAS 9 TO 18 FT. 

...GALE WARNING... 
.24 HOUR FORECAST LOW 34N46W 1014 MB. OVER FORECAST WATERS 
WITHIN 180 NM NW SEMICIRCLE WINDS 25 TO 35 KT. SEAS 8 TO 13 FT.
.48 HOUR FORECAST LOW S OF AREA 30N48W 1014 MB. FROM 31N TO 38N 
BETWEEN 43W AND 52W WINDS 20 TO 30 KT. SEAS 9 TO 14 FT. 

.SYNOPSIS AND FORECAST. 

.OVER FORECAST WATERS FROM 48N TO 55N E OF 40W AREA OF W TO NW 
WINDS 20 TO 30 KT. SEAS 8 TO 13 FT. 
.24 HOUR FORECAST CONDITIONS E OF AREA.

.LOW 38N43W 1020 MB MOVING SW 10 KT. BETWEEN 90 NM AND 180 NM NW 
SEMICIRCLE AND WITHIN 120 NM SE SEMICIRCLE WINDS 20 TO 30 KT. 
SEAS TO 8 FT.
.24 HOUR FORECAST LOW 43N35W 1019 MB. OVER FORECAST WATERS 
WITHIN 120 NM SW QUADRANT WINDS 20 TO 30 KT. SEAS TO 8 FT.

.24 HOUR FORECAST LOW 57N57W 1007 MB. WINDS LESS THAN 25 KT. 
SEAS LESS THAN 8 FT. 
.48 HOUR FORECAST LOW 55N35W 1007 MB. WITHIN 480 NM SW QUADRANT 
WINDS 20 TO 30 KT. SEAS TO 10 FT. 

.48 HOUR FORECAST FROM 58N TO 60N BETWEEN 42W AND 47W WINDS 20 
TO 30 KT. SEAS TO 8 FT.

.LIGHT TO MODERATE FREEZING SPRAY OVER ICE FREE FORECAST WATERS 
N OF 62N W OF 53W. 
.24 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY N OF 63N W OF 
52W. 
.48 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY N OF 62N AND 
W OF 54W. 

.DENSE FOG. 48 HOUR FORECAST VSBY LESS THAN 1 NM OVER FORECAST 
WATERS FROM 40N TO 44N BETWEEN 64W AND 70W. 

.HIGH 41N64W 1034 MB MOVING E 15 KT. 
.24 HOUR FORECAST HIGH 40N54W 1032 MB. 
.48 HOUR FORECAST HIGH 42N44W 1034 MB.

.48 HOUR FORECAST HIGH 56N53W 1021 MB. 

.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 1200 UTC TUE APR 24.
24 HOUR FORECAST VALID 1200 UTC WED APR 25.
48 HOUR FORECAST VALID 1200 UTC THU APR 26.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.ATLC COLD FRONT FROM 31N80W TO 29N81W. N OF 28N BETWEEN 71W AND 
77W SE TO S WINDS 20 TO 25 KT...TO 30 KT N OF 30N BETWEEN 74W 
AND 77W. SEAS 8 TO 12 FT... HIGHEST NEAR 30N76W. N OF 29N W OF 
77W WINDS 20 KT OR LESS. SEAS TO 9 FT IN SE SWELL. WINDS AND 
SEAS HIGHER IN AND NEAR NUMEROUS SHOWERS AND SCATTERED TSTMS N 
OF 26N BETWEEN 74W AND 78W.
.24 HOUR FORECAST COLD FRONT FROM 31N75W TO 23N81W. N OF 30N 
BETWEEN 65W AND 71W SE TO S WINDS 20 TO 25 KT. SEAS 8 TO 10 FT. 
.48 HOUR FORECAST DISSIPATING COLD FRONT FROM 31N70W TO 23N80W. 
WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.ATLC FROM 17N TO 22N E OF 40W WINDS 20 KT OR LESS. SEAS 8 FT IN 
NE SWELL. 
.12 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.ATLC 48 HOUR FORECAST LOW PRES NEAR 30N48W 1015 MB. N OF 30N 
BETWEEN 48W AND 51W N TO NE WINDS 20 TO 25 KT. SEAS 10 TO 12 FT. 
ELSEWHERE N OF 27N BETWEEN 45W AND 53W WINDS 20 KT OR LESS. SEAS 
8 TO 10 FT IN NE SWELL. 

.CARIBBEAN FROM 11N TO 13N BETWEEN 73W AND 77W NE TO E WINDS 20 
TO 25 KT. SEAS TO 9 FT. 
.24 HOUR FORECAST FROM 11N TO 13.5N BETWEEN 73W AND 78W NE TO E 
WINDS 20 TO 25 KT. SEAS 8 TO 9 FT.
.48 HOUR FORECAST FRO 11N TO 13N BETWEEN 74W AND 77W NE TO E 
WINDS 20 TO 25 KT. SEAS 8 FT.

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

$$
.FORECASTER AL. NATIONAL HURRICANE CENTER.
Last Update:15:50Z, 24 April 2018
Updates: Four times per day