AGNT40 KWNM 111358
MIMATN

Marine Weather Discussion for N Atlantic Ocean
NWS Ocean Prediction Center Washington DC
858 AM EST Mon Dec 11 2017

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

In the near term, the ongoing forecast appears to have conditions
well forecast. Observations corresponded with near-term guidance
with sustained winds around 12UTC in the teens to lower 20s knots
across the offshore waters with gusts mostly in the 20s knots.
The highest gust noted was 23 knots with a peak wind of 27 knots
at buoy 44066 off of the New Jersey coast. Wave height
observations in the eastern offshore were averaging about a foot
above forecast and made minor adjustments there for the near
term. 

Additionally, water vapor imagery showed a noticeable mid-level
shortwave moving over the the offshore waters with a comma from
the mid-Atlantic north. This should help provide for a good
chance of rain especially from the mid-Atlantic offshore waters
northward today, more spotty south. The HRRR WRF guidance seemed
to handle this well.

925mb winds remain below 30 knots until Tuesday when, by 18UTC,
those winds increase to 30 to 40 knots, and eventually to 50
knots near ANZ905 and ANZ910 Tuesday night. Gales are forecast by
all guidance offshore of the Carolina and mid-Atlantic coasts
Tuesday afternoon, spreading across the eastern offshore waters 
Tuesday night with widespread gales from late Tuesday night into
Wednesday in good cold-air advection, gradually diminishing 
Wednesday and Wednesday night southwest to northeast as low
pressure lifts northeast. Again, guidance consistency is good
through Thursday.

In the later parts of the forecast, will need to review later
guidance for the potential for gales late Friday into Saturday.
Both the ECMWF and the GFS are stronger with a surface wave
moving through the offshore waters then, near 1000mb, while the
UKMET is considerably weaker with surface low pressure, only to
around 1010mb by Saturday 00UTC near ANZ905 and ANZ910. If the
GFS and ECMWF trend continues this afternoon, would likely need
to note the possibility of gales by late Friday afternoon off the
Carolina coast spreading northeast overnight Friday. With surface
low pressure deepening the GFS and ECMWF would increase winds to
storm force by Saturday morning but east of the offshore waters.

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

The highest Ascat wind retrievals from last evening were to 25 
kt across the NT1 and northern NT2 zones. The 00Z models were 
all slightly weaker than this Ascat data. The previous OPC wind 
grids which blended the higher GFS first sigma level winds with 
the ECMWF 10m winds appeared well initialized.  The most recent 
GOES water vapor imagery clearly depicts the first few upper 
level features forecast to impact the offshore waters over the 
next few days. The first upper level shortwave trough is moving 
E across the Ohio Valley and the 00Z models are consistent that 
this feature will exit the northern Mid Atlantic and New England 
coasts later this morning into early this afternoon and support 
a developing cold front across the offshore waters. As a weak 
surface low passes just N of the NT1 waters and pulls the cold 
front across the area, the guidance is consistent that will see 
some enhancement in the surface winds, only to 25 kt or so, 
today. A weak high pressure ridge should then rapidly pass E 
across the waters tonight. Based on its superior initialization, 
will update the today/tonight wind grids with the same even 
blend of the 00Z GFS first sigma level and 00Z ECMWF 10m winds.  

The next more vigorous upper level feature is dropping SE across 
the Northern Plains this morning and is expected to approach the 
Mid Atlantic coast Tue while weakening. Another sharply 
amplified upper shortwave trough should then quickly follow 
later Tue/Tue night with the resultant upper low becoming 
negatively tilted off the northern Mid Atlantic and New England 
early Wed. The 00Z models have converged with the track and 
timing of intensifying surface moving northward through New 
England and Quebec late Tue through Wed night. Gale headlines 
will remain in the forecast for southerly winds ahead of the 
cold front beginning Tue. Then by Tue night and extending into 
Thu, the 00Z models are consistent that the gales will become 
widespread across the offshore waters in some of the strongest 
cold air advection of the season so far. We have well above 
average forecast confidence with these gales. Will be 
maintaining continuity with the wind grids and using the same 
even blend of the ECMWF 10m and GFS first sigma level winds 
through Thu. Guidance is then rapidly moving a clipper type low 
off the Mid Atlantic coast Thu and suggesting another round of 
potential gales across the NT2 waters. Both the 00Z ECMWF and 
00Z UKMET are faster than the 00Z GFS. With the lack of ensemble 
consensus with this system, will hold off on adding any gales to 
the forecast at this time. However we do favor the more 
progressive ECMWF/UKMET.     

The discrepancy between the models then increases significantly 
with yet another amplified upper level trough forecast to 
approach the coast Fri and move offshore Fri night. The GFS has 
consistently been the more amplified outlier, and the 00Z GFS 
even trended slightly stronger from its previous run. With 
forecast uncertainty higher than normal at days 4/5 and to 
maintain continuity, we will be opting to populate our wind 
grids with the WPC medium range guidance, which does increase 
winds to 30 kt across the NT2 waters Fri and Fri night.  

Seas...Both the 00Z Wavewatch III and 00Z ECMWF WAM initialized 
well over the offshore waters, and intend to use a 1:1 blend 
through Thu night, before transitioning solely to the 00Z ECMWF 
WAM Fri. 

Extratropical Storm Surge Guidance: No major deviation from the 
latest guidance appears needed at this time, with little chance 
for a significant positive surge event along the East coast over 
the next few days. 


.WARNINGS...Preliminary.

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

.NT2 Mid-Atlantic Waters...
.ANZ820...Hudson Canyon to Baltimore Canyon...
     Gale Tuesday night.
     Gale Possible Wednesday into Wednesday night. 
.ANZ915...Hudson Canyon to the Great South Channel...
     Gale Tuesday night.
     Gale Possible Wednesday into Wednesday night. 
.ANZ920...Baltimore Canyon to the Great South Channel...
     Gale Tuesday into Tuesday night. 
     Gale Possible Wednesday into Wednesday night. 
.ANZ905...The Great South Channel to the Hague Line...
     Gale Tuesday night.
     Gale Possible Wednesday into Thursday. 
.ANZ910...East of the Great South Channel and south of 39N...
     Gale Tuesday into Tuesday night. 
     Gale Possible Wednesday into Thursday. 
.ANZ825...Inner Waters from Baltimore Canyon to Cape Charles Light...
     Gale Tuesday night.
     Gale Possible Wednesday.
.ANZ828...Inner Waters from Cape Charles Light to Currituck Beach Light...
     Gale Tuesday night.
     Gale Possible Wednesday.
.ANZ925...Outer Waters from Baltimore Canyon to Hatteras Canyon...
     Gale Tuesday into Tuesday night. 
     Gale Possible Wednesday into Wednesday night. 
.ANZ830...Inner Waters from Currituck Beach Light to Cape Hatteras...
     Gale Tuesday into Tuesday night. 
     Gale Possible Wednesday.
.ANZ833...Inner Waters from Cape Hatteras to Cape Fear...
     Gale Tuesday into Tuesday night. 
     Gale Possible Wednesday.
.ANZ930...Outer Waters from Hatteras Canyon to Cape Fear...
     Gale Tuesday into Tuesday night. 
     Gale Possible Wednesday.
.ANZ835...Inner Waters from Cape Fear to 31N...
     Gale Tuesday into Tuesday night. 
.ANZ935...Outer Waters from Cape Fear to 31N...
     Gale Tuesday into Tuesday night. 
     Gale Possible Wednesday.

$$

.Forecaster Figurskey/Clark. Ocean Prediction Center.
Last Update:13:59Z, 11 December 2017
Updates: Four times per day

FZNT21 KWBC 111429
OFFNT1

Offshore Waters Forecast
NWS Ocean Prediction Center Washington DC
929 AM EST Mon Dec 11 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.

ANZ898-120230-
929 AM EST Mon Dec 11 2017

.SYNOPSIS FOR NEW ENGLAND WATERS...Weak low pressure will pass 
just north of the area and pull a developing cold front across 
the waters today. Developing low pressure will approach the area
from the west tonight into Tuesday, then pass just north of the 
waters late Tuesday and Tuesday night while pulling a strong 
cold front across the area. The low will slowly move off to the
northeast Wednesday through Thursday. Another low will rapidly 
pass south of the area Thursday. High pressure will build east
across the waters Thursday night through Friday night as low 
pressure moves offshore south of the area. 

$$

ANZ800-120230-
Gulf of Maine to the Hague Line-
929 AM EST Mon Dec 11 2017

...GALE WARNING...

.TODAY...W to SW winds 15 to 25 kt. Seas 4 to 8 ft. Chance of
rain. 
.TONIGHT...W winds 5 to 15 kt, becoming E to NE. Seas 4 to 7 ft.
.TUE...S winds 10 to 20 kt, becoming SE 20 to 30 kt. Seas 3 to
5 ft, building to 5 to 9 ft. 
.TUE NIGHT...S to SE winds 25 to 35 kt, becoming SW 15 to 25 kt.
Seas 6 to 11 ft. Rain with VSBY 1 nm or less. 
.WED...SW winds 20 to 30 kt, becoming W 25 to 35 kt. Seas
building to 9 to 15 ft. 
.WED NIGHT...W winds 30 to 40 kt. Seas building to 11 to 19 ft. 
.THU...W winds 25 to 35 kt, becoming 25 to 30 kt. Seas 11 to
18 ft. 
.THU NIGHT...W to NW winds 15 to 25 kt. Seas 7 to 12 ft,
subsiding to 4 to 7 ft.
.FRI...Variable winds less than 10 kt. Seas 3 to 6 ft. 
.FRI NIGHT...N winds 5 to 10 kt, becoming NW 10 to 15 kt. Seas
3 to 6 ft. 

$$

ANZ805-120230-
Georges Bank between Cape Cod and 68W north of 1000 fm-
929 AM EST Mon Dec 11 2017

...GALE FORCE WINDS POSSIBLE WED...

.TODAY...W winds 15 to 25 kt. Seas 4 to 8 ft. Chance of rain. 
.TONIGHT...W winds 5 to 15 kt, becoming S to SW 5 to 10 kt. Seas
4 to 7 ft. 
.TUE...S to SE winds 10 to 20 kt, increasing to 20 to 30 kt.
Seas 5 to 8 ft. 
.TUE NIGHT...SW winds 15 to 25 kt, becoming W 20 to 30 kt. Seas
8 to 13 ft. Rain with VSBY 1 nm or less. 
.WED...W winds 30 to 40 kt. Seas building to 11 to 19 ft. 
.WED NIGHT...W winds 30 to 35 kt. Seas 12 to 20 ft. 
.THU...W winds 25 to 35 kt, diminishing to 20 to 30 kt. Seas
11 to 19 ft, subsiding to 7 to 12 ft. 
.THU NIGHT...W to NW winds 15 to 25 kt. Seas subsiding to 5 to 8
ft. 
.FRI...Variable winds less than 5 kt, becoming W. Seas 4 to
6 ft. 
.FRI NIGHT...W winds 5 to 10 kt, becoming NW 10 to 15 kt. Seas
4 to 7 ft. 

$$

ANZ900-120230-
Georges Bank between 68W and the Hague Line-
929 AM EST Mon Dec 11 2017

...GALE WARNING...

.TODAY...W winds 15 to 20 kt. Seas 7 to 9 ft. Chance of rain. 
.TONIGHT...W to NW winds 10 to 20 kt, becoming W to SW less than
10 kt. Seas 4 to 7 ft. Chance of rain. 
.TUE...S to SE winds 10 to 20 kt, increasing to 20 to 30 kt.
Seas 4 to 8 ft. 
.TUE NIGHT...S winds 25 to 35 kt, becoming W 20 to 30 kt. Seas
7 to 13 ft. Rain with VSBY 1 nm or less. 
.WED...W winds 25 to 35 kt. Seas building to 11 to 19 ft. 
.WED NIGHT...W winds 30 to 40 kt. Seas building to 16 to 22 ft. 
.THU...W winds 25 to 35 kt. Seas subsiding to 12 to 16 ft. 
.THU NIGHT...W winds diminishing to 15 to 20 kt. Seas subsiding 
to 8 to 10 ft.
.FRI...W to NW winds 5 to 15 kt. Seas subsiding to 4 to 7 ft.
.FRI NIGHT...W winds 5 to 10 kt, becoming NW 10 to 15 kt. Seas
5 to 6 ft. 

$$

ANZ810-120230-
South of New England between the Great South Channel and Montauk
Point to 1000 fm-
929 AM EST Mon Dec 11 2017

...GALE WARNING...

.TODAY...W winds 10 to 20 kt. Seas 5 to 8 ft. Chance of rain. 
.TONIGHT...W winds 5 to 15 kt, becoming S. Seas 4 to 7 ft. 
.TUE...S winds 10 to 20 kt, becoming S to SW 20 to 30 kt. Seas
4 to 8 ft. 
.TUE NIGHT...W to SW winds 15 to 25 kt, becoming W 25 to 35 kt.
Seas 8 to 14 ft. 
.WED...W winds 30 to 40 kt. Seas building to 14 to 19 ft. 
.WED NIGHT...W winds 30 to 40 kt. Seas 12 to 20 ft. 
.THU...W winds 20 to 30 kt. Seas 10 to 17 ft, subsiding to 8 to
12 ft.
.THU NIGHT...W to NW winds 15 to 25 kt, diminishing to 5 to
15 kt. Seas subsiding to 4 to 7 ft. 
.FRI...W winds less than 10 kt. Seas 3 to 6 ft. 
.FRI NIGHT...W winds 5 to 15 kt, becoming NW 10 to 20 kt. Seas
4 to 7 ft. 

$$

ANZ815-120230-
South of Long Island between Montauk Point and Sandy Hook to
1000 fm-
929 AM EST Mon Dec 11 2017

...GALE WARNING...

.TODAY...W winds 10 to 20 kt. Seas 4 to 7 ft. Chance of rain. 
.TONIGHT...W to SW winds 5 to 10 kt, becoming S 10 to 20 kt.
Seas 3 to 5 ft. 
.TUE...S winds 15 to 25 kt, becoming SW 20 to 30 kt. Seas 5 to
9 ft. 
.TUE NIGHT...W winds 20 to 30 kt, increasing to 25 to 35 kt.
Seas 8 to 14 ft. 
.WED...W winds 30 to 40 kt. Seas building to 11 to 18 ft. 
.WED NIGHT...W winds 30 to 40 kt, diminishing to 25 to 30 kt.
Seas 10 to 18 ft. 
.THU...W winds 20 to 30 kt. Seas 8 to 13 ft, subsiding to 4 to 8
ft.
.THU NIGHT...NW winds 15 to 20 kt, diminishing to 5 to 15 kt.
Seas 4 to 6 ft. 
.FRI...W winds less than 5 kt, increasing to 10 to 15 kt. Seas
3 to 5 ft. 
.FRI NIGHT...W winds 10 to 15 kt, becoming NW 15 to 20 kt. Seas
2 to 4 ft, building to 4 to 8 ft. 

$$

.Forecaster Figurskey. Ocean Prediction Center.
Last Update:14:30Z, 11 December 2017
Updates: Four times per day

FZNT22 KWBC 111429
OFFNT2

Offshore Waters Forecast
NWS Ocean Prediction Center Washington DC
929 AM EST Mon Dec 11 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.

ANZ899-120230-
929 AM EST Mon Dec 11 2017

.SYNOPSIS FOR MID ATLC WATERS...Weak high pressure across the
south waters will shift east of the area today. Developing low 
pressure will approach the north waters tonight from the west,
then pass north of the region Tuesday night and Wednesday while 
pulling a strong cold front east across the area. Another ridge 
will build east over the waters Wednesday night through Thursday,
then shift east of the area Thursday night. Low pressure will 
approach the region from the west and move quickly east across 
the central and north waters Thursday. Another low pressure
system will move offshore Friday and Friday night. 

$$

ANZ820-120230-
Hudson Canyon to Baltimore Canyon to 1000 fm-
929 AM EST Mon Dec 11 2017

...GALE WARNING...

.TODAY...W winds 10 to 20 kt. Seas 3 to 6 ft. 
.TONIGHT...W to SW winds 5 to 10 kt, becoming S 10 to 20 kt.
Seas 3 to 5 ft. 
.TUE...S winds 15 to 25 kt, becoming W to SW 20 to 30 kt. Seas
5 to 9 ft. 
.TUE NIGHT...W winds 25 to 30 kt, increasing to 30 to 35 kt.
Seas 8 to 14 ft. 
.WED...W winds 30 to 40 kt. Seas building to 10 to 17 ft. 
.WED NIGHT...W winds 25 to 35 kt, diminishing to 20 to 30 kt.
Seas 10 to 17 ft, subsiding to 6 to 12 ft. 
.THU...W winds diminishing to 10 to 20 kt. Seas subsiding to 3 
to 6 ft.
.THU NIGHT...NW winds 10 to 20 kt, becoming N to NW 5 to 10 kt.
Seas 3 to 6 ft. 
.FRI...W winds 5 to 10 kt, increasing to 10 to 15 kt. Seas 3 to
5 ft. 
.FRI NIGHT...W winds 15 to 20 kt, becoming NW 15 to 25 kt. Seas
2 to 4 ft, building to 4 to 8 ft. 

$$

ANZ915-120230-
Between 1000 fm and 38.5N west of 69W-
929 AM EST Mon Dec 11 2017

...GALE WARNING...

.TODAY...W winds 15 to 25 kt. Seas 5 to 8 ft. Chance of rain. 
.TONIGHT...W winds 5 to 15 kt, becoming S. Seas 4 to 7 ft. 
.TUE...S to SW winds 20 to 30 kt. Seas 4 to 5 ft, building to
6 to 10 ft. Showers. Scattered TSTMs. 
.TUE NIGHT...W winds 20 to 30 kt, increasing to 25 to 35 kt.
Seas 9 to 16 ft. Rain with VSBY 1 nm or less. 
.WED...W winds 30 to 40 kt. Seas building to 14 to 21 ft. 
.WED NIGHT...W winds 30 to 40 kt. Seas 12 to 21 ft. 
.THU...W winds diminishing to 15 to 25 kt. Seas 10 to 17 ft,
subsiding to 6 to 11 ft.
.THU NIGHT...W to NW winds 15 to 25 kt, diminishing to 5 to
15 kt. Seas 6 to 9 ft. 
.FRI...W winds 5 to 10 kt, increasing to 10 to 15 kt. Seas 4 to
7 ft. 
.FRI NIGHT...W winds 10 to 20 kt, becoming NW 15 to 25 kt. Seas
3 to 6 ft, building to 7 to 10 ft. 

$$

ANZ920-120230-
Baltimore Canyon to 69W east of 1000 fm and south of 38.5N to
250 nm offshore-
929 AM EST Mon Dec 11 2017

...GALE WARNING...

.TODAY...W winds 15 to 25 kt. Seas 5 to 9 ft. Chance of rain. 
.TONIGHT...W to NW winds 5 to 15 kt, becoming SW. Seas 4 to
7 ft. 
.TUE...S to SW winds 20 to 30 kt, becoming SW 25 to 35 kt. Seas
4 to 7 ft, building to 7 to 12 ft. Showers and TSTMs. 
.TUE NIGHT...W to SW winds 30 to 40 kt. Seas 10 to 17 ft.
Showers with VSBY 1 nm or less. 
.WED...W winds 30 to 40 kt. Seas 13 to 21 ft. 
.WED NIGHT...W winds 25 to 35 kt. Seas 13 to 22 ft. 
.THU...W winds 20 to 30 kt. Seas 10 to 17 ft, subsiding to 6 to
12 ft.
.THU NIGHT...NW winds 10 to 20 kt, becoming W to NW 5 to 15 kt.
Seas 6 to 12 ft. 
.FRI...W winds 15 to 25 kt. Seas 4 to 8 ft. 
.FRI NIGHT...W to NW winds 20 to 30 kt. Seas 7 to 12 ft. 

$$

ANZ905-120230-
East of 69W to the Hague Line between 1000 fm and 39N-
929 AM EST Mon Dec 11 2017

...GALE WARNING...

.TODAY...W to NW winds 10 to 20 kt. Seas 7 to 9 ft. Chance of
rain. 
.TONIGHT...NW winds 10 to 20 kt, becoming variable less than
10 kt. Seas 5 to 7 ft. Chance of rain. 
.TUE...S winds 10 to 20 kt, increasing to 20 to 30 kt. Seas 5 to
9 ft. Scattered showers and TSTMs. 
.TUE NIGHT...S to SW winds 30 to 40 kt. Seas 11 to 18 ft.
Showers and scattered TSTMs. VSBY 1 NM or less. 
.WED...W winds 30 to 40 kt. Seas 12 to 21 ft. 
.WED NIGHT...W winds 35 to 40 kt. Seas 19 to 23 ft. 
.THU...W winds 25 to 35 kt, becoming 20 to 30 kt. Seas 13 to 22 
ft.
.THU NIGHT...W to NW winds 15 to 25 kt. Seas 9 to 15 ft,
subsiding to 7 to 11 ft.
.FRI...W winds 5 to 15 kt. Seas 6 to 9 ft. 
.FRI NIGHT...W to NW winds 5 to 15 kt, increasing to 15 to
25 kt. Seas 6 to 10 ft. 

$$

ANZ910-120230-
East of 69W and south of 39N to 250 nm offshore-
929 AM EST Mon Dec 11 2017

...GALE WARNING...

.TODAY...W winds 15 to 25 kt. Seas 7 to 9 ft. Chance of rain. 
.TONIGHT...NW winds 5 to 15 kt, becoming variable. Seas 5 to
8 ft. 
.TUE...S winds 10 to 20 kt, becoming S to SW 25 to 35 kt. Seas
5 to 6 ft, building to 6 to 11 ft. Scattered showers and TSTMs.
.TUE NIGHT...W to SW winds 30 to 40 kt. Seas 10 to 18 ft.
Scattered showers and TSTMs with VSBY 1 nm or less.
.WED...W winds 30 to 40 kt. Seas building to 15 to 22 ft. 
.WED NIGHT...W winds 30 to 35 kt. Seas 18 to 23 ft. 
.THU...W winds 25 to 35 kt, becoming W to SW 20 to 30 kt. Seas
15 to 22 ft, subsiding to 10 to 15 ft. 
.THU NIGHT...W to NW winds 10 to 20 kt. Seas 8 to 13 ft. 
.FRI...W winds 5 to 15 kt, increasing to 10 to 20 kt. Seas
subsiding to 6 to 8 ft. 
.FRI NIGHT...W winds 15 to 25 kt. Seas 6 to 11 ft. 

$$

ANZ825-120230-
Baltimore Canyon to Cape Charles Light to 100 nm offshore-
929 AM EST Mon Dec 11 2017

...GALE WARNING...

.TODAY...W to NW winds 5 to 15 kt. Seas 3 to 6 ft. 
.TONIGHT...SW winds less than 10 kt, becoming S 10 to 20 kt.
Seas 2 to 4 ft. 
.TUE...W to SW winds 20 to 30 kt. Seas 6 to 10 ft. 
.TUE NIGHT...NW winds 25 to 30 kt, becoming W to NW 30 to 35 kt.
Seas 7 to 13 ft. 
.WED...W winds 25 to 35 kt. Seas 8 to 14 ft. 
.WED NIGHT...W winds becoming 20 to 25 kt. Seas 7 to 12 ft,
subsiding to 4 to 8 ft.
.THU...W to SW winds 15 to 25 kt. Seas 4 to 7 ft. 
.THU NIGHT...N winds 10 to 15 kt, becoming NE 5 to 10 kt. Seas
3 to 6 ft. 
.FRI...W winds 5 to 10 kt, increasing to 10 to 15 kt. Seas 2 to
4 ft. 
.FRI NIGHT...W winds 15 to 25 kt, becoming NW. Seas building to 
5 to 8 ft. 

$$

ANZ828-120230-
Cape Charles Light to Currituck Beach Light to 100 nm offshore-
929 AM EST Mon Dec 11 2017

...GALE WARNING...

.TODAY...W winds 15 to 20 kt, diminishing to 5 to 15 kt. Seas
3 to 6 ft. 
.TONIGHT...SW winds 5 to 10 kt, becoming S to SW 10 to 20 kt.
Seas 3 to 5 ft. 
.TUE...SW winds 20 to 30 kt, becoming W. Seas 4 to 8 ft,
building to 8 to 13 ft. 
.TUE NIGHT...W to NW winds 25 to 30 kt, becoming 25 to 35 kt.
Seas 8 to 14 ft. 
.WED...W winds 30 to 35 kt, diminishing to 25 to 30 kt. Seas
9 to 15 ft. 
.WED NIGHT...W winds 20 to 25 kt. Seas subsiding to 4 to 8 ft.
.THU...SW winds 20 to 25 kt, becoming W 20 to 30 kt. Seas 6 to
10 ft. 
.THU NIGHT...N to NW winds 5 to 15 kt. Seas 6 to 10 ft. 
.FRI...W winds 5 to 15 kt, increasing to 10 to 20 kt. Seas 4 to
7 ft. 
.FRI NIGHT...W winds 20 to 25 kt, becoming NW 15 to 25 kt. Seas
5 to 9 ft. 

$$

ANZ925-120230-
Baltimore Canyon to Hatteras Canyon between 100 nm and 250 nm
offshore-
929 AM EST Mon Dec 11 2017

...GALE WARNING...

.TODAY...W winds 10 to 20 kt. Seas 4 to 8 ft. Chance of rain. 
.TONIGHT...W to SW winds 5 to 15 kt, becoming SW 10 to 20 kt.
Seas 4 to 7 ft. 
.TUE...SW winds 20 to 30 kt, increasing to 25 to 35 kt. Seas
5 to 9 ft, building to 8 to 14 ft. Scattered showers and TSTMs with
VSBY 1 nm or less. 
.TUE NIGHT...W to SW winds 30 to 40 kt. Seas 10 to 17 ft. Rain
with VSBY 1 nm or less early. 
.WED...W winds 30 to 40 kt. Seas 12 to 20 ft. 
.WED NIGHT...W winds 25 to 35 kt, diminishing to 20 to 30 kt.
Seas 11 to 19 ft, subsiding to 8 to 14 ft. 
.THU...W winds 20 to 30 kt. Seas 7 to 13 ft. 
.THU NIGHT...W to NW winds 20 to 30 kt, diminishing to 10 to
20 kt. Seas becoming 7 to 10 ft. 
.FRI...W winds 15 to 25 kt. Seas subsiding to 4 to 7 ft. 
.FRI NIGHT...W to NW winds 20 to 30 kt. Seas building to 7 to 12
ft.

$$

ANZ830-120230-
Currituck Beach Light to Cape Hatteras to 100 nm offshore-
929 AM EST Mon Dec 11 2017

...GALE WARNING...

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

$$

ANZ833-120230-
Cape Hatteras to Cape Fear to 100 nm offshore-
929 AM EST Mon Dec 11 2017

...GALE WARNING...

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

$$

ANZ930-120230-
Hatteras Canyon to Cape Fear between 100 nm and 250 nm offshore-
929 AM EST Mon Dec 11 2017

...GALE WARNING...

.TODAY...W winds 10 to 20 kt, becoming 10 to 15 kt. Seas 4 to
6 ft. Chance of rain. 
.TONIGHT...W to SW winds 5 to 10 kt, becoming SW 10 to 20 kt.
Seas 4 to 6 ft. 
.TUE...SW winds 20 to 30 kt, increasing to 25 to 35 kt. Seas
5 to 9 ft, building to 8 to 14 ft. 
.TUE NIGHT...W winds 30 to 35 kt. Seas 10 to 16 ft. Scattered
showers with VSBY 1 nm or less. 
.WED...W winds 30 to 40 kt. Seas 11 to 19 ft. 
.WED NIGHT...W winds 20 to 30 kt, diminishing to 15 to 20 kt. 
Seas 10 to 17 ft, subsiding to 6 to 12 ft.
.THU...SW winds 20 to 30 kt. Seas 7 to 12 ft. 
.THU NIGHT...W winds 20 to 30 kt, diminishing to 10 to 20 kt. 
Seas 7 to 10 ft.
.FRI...W to SW winds 15 to 25 kt. Seas 5 to 9 ft. 
.FRI NIGHT...W winds 25 to 30 kt. Seas 6 to 11 ft. 

$$

ANZ835-120230-
Cape Fear to 31N to 1000 fm-
929 AM EST Mon Dec 11 2017

...GALE WARNING...

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

$$

ANZ935-120230-
Cape Fear to 31N east of 1000 fm to 250 nm offshore-
929 AM EST Mon Dec 11 2017

...GALE WARNING...

.TODAY...W to NW winds 10 to 15 kt, becoming W 5 to 10 kt. Seas
4 to 6 ft. 
.TONIGHT...W winds 5 to 15 kt, becoming SW 10 to 20 kt. Seas
4 to 6 ft. 
.TUE...SW winds 20 to 30 kt, becoming W to SW 25 to 35 kt. Seas
4 to 8 ft, building to 8 to 13 ft. 
.TUE NIGHT...W to NW winds 30 to 35 kt. Seas 9 to 16 ft. 
.WED...W to NW winds 25 to 35 kt, becoming W 20 to 30 kt. Seas
10 to 16 ft. 
.WED NIGHT...W winds 15 to 25 kt, diminishing to 10 to 15 kt.
Seas 8 to 14 ft, subsiding to 5 to 9 ft. 
.THU...W to SW winds 15 to 25 kt. Seas 6 to 10 ft. 
.THU NIGHT...W winds 15 to 25 kt. Seas 6 to 10 ft. 
.FRI...W to SW winds 20 to 25 kt. Seas 5 to 8 ft. 
.FRI NIGHT...W to NW winds 20 to 25 kt. Seas 6 to 11 ft. 

$$

.Forecaster Figurskey. Ocean Prediction Center.
Last Update:14:30Z, 11 December 2017
Updates: Four times per day

FZNT01 KWBC 110951
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV 
NWS OCEAN PREDICTION CENTER WASHINGTON DC 
1030 UTC MON DEC 11 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). 

PAN PAN 

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

SYNOPSIS VALID 0600 UTC DEC 11 
24 HOUR FORECAST VALID 0600 UTC DEC 12 
48 HOUR FORECAST VALID 0600 UTC DEC 13 

.WARNINGS. 

...HURRICANE FORCE WIND WARNING... 
.LOW 56N52W 957 MB MOVING NE 30 KT. FRONT EXTENDS FROM 54N41W TO 
46N46W TO 35N60W. WITHIN 420 NM S...120 NM W...AND 300 NM NE 
QUADRANTS WINDS 40 TO 55 KT. SEAS 12 TO 24 FT. ELSEWHERE WITHIN 
300 NM N...660 NM E...600 NM S...AND 300 NM W QUADRANTS....AND 
360 NM E OF THE FRONT WINDS 25 TO 40 KT. SEAS 10 TO 22 FT. 
.12 HOUR FORECAST LOW 60N41W 958 MB. WITHIN 240 NM S QUADRANT 
WINDS 50 TO 65 KT. SEAS 20 TO 40 FT. 
.24 HOUR FORECAST LOW 62N35W 957 MB. WITHIN 360 NM S AND SE AND 
60 NM E OF THE GREENLAND COAST WINDS 45 TO 60 KT. SEAS 24 TO 46 
FT. ALSO WITHIN 480 NM S OF A LINE FROM LOW CENTER TO 55N60W 
WINDS 30 TO 45 KT. SEAS 12 TO 34 FT. ELSEWHERE WITHIN 240 NM W 
AND SW OF THE GREENLAND COAST WINDS 25 TO 35 KT. SEAS 10 TO 18 
FT. 
.48 HOUR FORECAST LOW E OF AREA 61N31W 964 MB. WITHIN 480 NM SW 
QUADRANT WINDS 35 TO 50 KT. SEAS 18 TO 32 FT. ELSEWHERE WITHIN 
720 NM SW AND 300 NM NW QUADRANTS WINDS 25 TO 40 KT. SEAS 12 TO 
24 FT. 

...GALE WARNING... 
.24 HOUR FORECAST NEW LOW 45N44W 1012 MB. WITHIN 360 NM SE 
SEMICIRCLE WINDS 25 TO 35 KT. SEAS 10 TO 16 FT. ELSEWHERE WITHIN 
360 NM E AND SE OF A FRONT FROM 46N35W TO LOW CENTER TO 38N55W 
TO 32N58W WINDS 20 TO 30 KT. SEAS 8 TO 12 FT. 
.48 HOUR FORECAST LOW WELL E OF AREA. WITHIN 300 NM E AND SE OF 
A FRONT FROM 45N35W TO 42N46W TO 33N55W WINDS 20 TO 30 KT. SEAS 
8 TO 14 FT. 

...GALE WARNING... 
.36 HOUR FORECAST LOW INLAND NEAR 43N76W 991 MB. N OF 31N AND 
WITHIN 540 NM SE AND 840 NM S QUADRANTS WINDS 25 TO 35 KT. SEAS 
TO 12 FT. 
.48 HOUR FORECAST LOW INLAND NEAR 45N71W 985 MB. N OF 31N AND 
WITHIN 600 NM E AND 960 NM S QUADRANTS WINDS 30 TO 45 KT. SEAS 
10 TO 18 FT.  

...HEAVY FREEZING SPRAY WARNING... 
.LIGHT TO MODERATE FREEZING SPRAY OVER ICE FREE FORECAST WATERS 
W OF A LINE FROM 56N57W TO 62N59W TO 67N55W. 
.24 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY W OF A LINE 
FROM 51N52W TO 57N49W TO 62N57W TO 67N55W.
.48 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY W OF A LINE 
FROM 55N52W TO 62N58W TO 67N55W. 

.SYNOPSIS AND FORECAST. 

.LOW 59N41W 991 MB DRIFTING W. WITHIN 240 NM N AND NE QUADRANTS 
WINDS TO 25 KT. SEAS 8 TO 12 FT. 
.24 HOUR FORECAST LOW DISSIPATED. CONDITIONS DESCRIBED ABOVE 
WITH LOW 62N35W. 

.24 HOUR FORECAST LOW 47N57W 1010 MB. WITHIN 360 NM S AND SW 
QUADRANTS WINDS TO 25 KT. SEAS TO 10 FT. 
.48 HOUR FORECAST AND CONDITIONS ABSORBED BY LOW 61N31W.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 43N TO 48N 
BETWEEN 43W AND 52W. 
.24 HOUR FORECAST CONDITIONS IMPROVED. 

.HIGH 36N36W 1031 MB NEARLY STATIONARY NEXT 12 HOURS THEN WILL 
MOVE E. 
.24 HOUR FORECAST HIGH MOVED E OF AREA.

.24 HOUR FORECAST NEW HIGH 47N45W 1018 MB. 
.48 HOUR FORECAST HIGH MOVED E OF AREA. 

.FORECASTER ACHORN. 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 0600 UTC MON DEC 11.
24 HOUR FORECAST VALID 0600 UTC TUE DEC 12.
48 HOUR FORECAST VALID 0600 UTC WED DEC 13.

.WARNINGS.

...GALE WARNING...
.CARIBBEAN STATIONARY FRONT FROM 20N75W TO 15N79W TO 09N81W.
WITHIN AREA BOUNDED BY 16N84W TO 17N79W TO 09N81W TO 10N82W TO
16N84W NW TO N WINDS 30 TO 35 KT. SEAS 12 TO 16 FT...EXCEPT LESS
THAN 8 FT FROM 13N TO 16N WITHIN 60 NM NE OF SHORE. ELSEWHERE W
OF FRONT...EXCEPT W OF A LINE FROM 22N82W TO 18N87W TO 16N87W...
N TO NE WINDS 20 TO 30 KT. SEAS 8 TO 13 FT. E OF FRONT TO A LINE
FROM 17N77W TO 09N79W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN N
TO NE SWELL. SCATTERED TSTMS S OF 14N W OF FRONT.
.18 HOUR FORECAST STATIONARY FRONT FROM 20N74W TO 15N79W TO 
10N82W TO 09N80.5W. S OF 28N W OF FRONT TO 85W N WINDS 20 TO 30 
KT...EXCEPT NW WINDS S OF 11N. SEAS 8 TO 11 FT...EXCEPT LESS THAN
8 FT FRONT 13N TO 16N WITHIN 60 NM OF SHORE.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST LITTLE CHANGE.

.SYNOPSIS AND FORECAST.

.ATLC COLD FRONT FROM 31N64W TO 25N70W THEN STATIONARY TO 20N75W.
WITHIN AREA BOUNDED BY 27N68W TO 27N76W TO 21N75W TO 27N76W N TO
NE WINDS 20 TO 25 KT. SEAS 8 TO 10 FT N OF 23N. WITHIN AREA 
BOUNDED BY 31N73W TO 31N65W TO 27N68W TO 27N76W TO 31N73W WINDS 
20 KT OR LESS. SEAS 8 TO 9 FT IN MIXED SE AND NW SWELL.
.24 HOUR FORECAST STATIONARY FRONT FROM 31N91W TO 27N65W TO
20N74W. WITHIN AREA BOUNDED BY 29N68W TO 20N64W TO 22N74W TO
29N68W WINDS 20 KT OR LESS. SEAS TO 8 FT IN MIXED SE AND NW
SWELL.
.30 HOUR FORECAST COLD FRONT FROM 31N60W TO 28N64W THEN
STATIONARY TO 22N72W TO 20N74W. CONDITIONS IMPROVE. WINDS 20 KT
OR LESS. SEAS LESS THAN 8 FT.

.ATLC TROUGH FROM 29N48W TO 20N51W TO 15N55W. WITHIN AREA
BOUNDED BY 28N43W TO 30N46W TO 30N50W TO 28N51W TO 24N43W TO 
25N42W TO 28N43W E TO SE WINDS 20 TO 25 KT. SEAS 9 TO 11 FT IN
MIXED NE AND SE SWELL. ELSEWHERE WITHIN AREA BOUNDED BY 30N35W 
TO 28N43W TO 31N52W TO 25N52W TO 20N41W TO 07N35W TO 30N35W WINDS
20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED NE AND SE SWELL.
SCATTERED TSTMS WITHIN AREA BOUNDED BY 27N49W TO 27N39W TO 19N41W
TO 27N49W.
.24 HOUR FORECAST TROUGH DISSIPATED. WITHIN AREA BOUNDED BY 
28N35W TO 31N40W TO 31N55W TO 20N47W TO 07N47W TO 07N35W TO 
28N35W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED NW AND SE
SWELL.
.48 HOUR FORECAST WITHIN AREA BOUNDED BY 31N35W TO 31N51W TO
20N45W TO 07N51W TO 07N35W TO 31N35W SEAS 8 TO 10 FT IN MIXED NE
AND NW SWELL.

.ATLC 33 HOUR FORECAST COLD FRONT APPROACHING FROM W. WITHIN 
AREA BOUNDED BY 31N81W TO 31N73W TO 30N76W TO 29N80W TO 31N81W SW
WINDS 20 TO 25 KT. SEAS TO 8 FT.
.39 HOUR FORECAST COLD FRONT FROM 31N78W TO 29.5N81W. WITHIN AREA
BOUNDED BY 31N81W TO 31N72W TO 28N75W TO 28N80.5W TO 31N78W SW TO
W WINDS 20 TO 30 KT...EXCEPT W TO NW WINDS BEHIND FRONT. SEAS 8
TO 11 FT N OF 29N E OF 80W.
.48 HOUR FORECAST COLD FRONT FROM 31N72W TO 27N76W TO 24N80W. 
WITHIN AREA BOUNDED BY 31N81W TO 31N67W TO 27N73W TO 27N80W TO 
31N81W SW TO W WINDS 20 TO 30 KT...EXCEPT W TO NW WINDS BEHIND
FRONT. SEAS 8 TO 14 FT IN MIXED NE AND NW SWELL...HIGHEST NEAR
31N74W.

.CARIBBEAN WITHIN 60 NM NW OF COAST OF COLOMBIA BETWEEN 74W AND
75.5W NE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.06 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 8 FT.

.GULF OF MEXICO 30 HOUR FORECAST COLD FRONT FROM 30N84W TO 27N88W
TO 27N93W. N OF 29N BETWEEN 86W AND 89W W TO NW WINDS 20 TO 25
KT. SEAS LESS THAN 8 FT.
.36 HOUR FORECAST COLD FRONT FROM 26.5N82W TO 25N94W. FROM 29N 
TO 29N E OF 86W W TO NW WINDS 20 TO 25 KT. SEAS TO 8 FT.
.48 HOUR FORECAST COLD FRONT FROM 24.5N81W TO 23N92W.
CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

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

$$
.FORECASTER LEWITSKY. NATIONAL HURRICANE CENTER.
Last Update:09:52Z, 11 December 2017
Updates: Four times per day