Alert archive / Alaska / Small Craft Advisories in 2017

Small Craft Advisory 608, NWS Anchorage, AK

August 18, 2017

NWS Anchorage, AK issued this small craft advisory at Aug 18, 2017, 3:28 AM AKDT. It was in force for 36 hr.

The area

The counties it named.

The facts

Issued
Aug 18, 2017, 3:28 AM AKDT (11:28 UTC)
Expired
Aug 19, 2017, 3:51 PM AKDT
In force
36 hr
Issued by
NWS Anchorage, AK

The text

As transmitted.

296 
FZAK51 PAFC 181128
CWFAER

Coastal Waters Forecast
National Weather Service Anchorage Alaska
328 AM AKDT Fri Aug 18 2017

Coastal Waters Forecast for the Northern Gulf of Alaska Coast
up to 100 nm out including Kodiak Island and Cook Inlet.

Wind forecasts reflect the predominant speed and direction
expected. Sea forecasts represent an average of the highest
one-third of the combined wind wave and swell height.

PKZ197-190030-
328 AM AKDT Fri Aug 18 2017
.SYNOPSIS FOR THE NORTH GULF COAST+KODIAK ISLAND WATERS+
COOK INLET...

A front over the northern Gulf will dissipate this morning. A 1004
mb low moves over Kodiak Island this morning and weakens to 1007
mb as it moves to 80 NM southeast of Prince William Sound Sat 
afternoon before dissipating Sat night. Another front moves into 
the western Gulf Sat afternoon.

$$

PKZ119-190030-
Cape Suckling to Cape Cleare-
328 AM AKDT Fri Aug 18 2017

...SMALL CRAFT ADVISORY TONIGHT...

.TODAY...S wind 15 kt. Seas 5 ft.
.TONIGHT...SE wind 25 kt. Seas 7 ft.
.SAT...S wind 20 kt. Seas 6 ft.
.SAT NIGHT...SE wind 15 kt. Seas 5 ft.
.SUN...E wind 30 kt. Seas 9 ft.
.MON...NE wind 25 kt. Seas 9 ft.
.TUE...NE wind 15 kt. Seas 6 ft.

$$

PKZ120-190030-
Cape Cleare to Gore Point-
328 AM AKDT Fri Aug 18 2017

.TODAY...SE wind 15 kt. Seas 5 ft. Rain.
.TONIGHT...N wind 15 kt. Seas 5 ft.
.SAT...NW wind 15 kt in the morning becoming variable 10 kt.
Seas 4 ft.
.SAT NIGHT...Variable wind 10 kt. Seas 4 ft.
.SUN...NE wind 20 kt. Seas 5 ft.
.MON...N wind 20 kt. Seas 5 ft.
.TUE...N wind 15 kt. Seas 7 ft.

$$

PKZ121-190030-
Resurrection Bay-
328 AM AKDT Fri Aug 18 2017

.TODAY...Variable wind less than 10 kt. Seas 2 ft. Rain.
.TONIGHT...Variable wind less than 10 kt. Seas 2 ft. Rain.
.SAT...Variable wind less than 10 kt becoming S 10 kt in the
afternoon. Seas 2 ft.
.SAT NIGHT...Variable wind 10 kt. Seas 2 ft.
.SUN THROUGH TUE...N wind 10 kt. Seas 2 ft.

$$

PKZ125-190030-
Prince William Sound-
328 AM AKDT Fri Aug 18 2017

.TODAY...SE wind 10 kt. Seas 2 ft. Rain.
.TONIGHT...E wind 15 kt. Seas 3 ft. Rain.
.SAT...NE wind 15 kt in the morning becoming variable less than
10 kt. Seas 3 ft.
.SAT NIGHT...NE wind 10 kt. Seas 2 ft.
.SUN...NE wind 20 kt. Seas 4 ft.
.MON...N wind 15 kt. Seas 3 ft.
.TUE...N wind 10 kt. Seas 2 ft.

$$

PKZ126-190030-
Port Valdez-
328 AM AKDT Fri Aug 18 2017

.TODAY...Variable wind less than 10 kt. Seas 2 ft. Rain showers.
.TONIGHT...Variable wind less than 10 kt. Seas 2 ft. Rain showers.
.SAT...Variable wind less than 10 kt. Seas 2 ft.
.SAT NIGHT...Variable wind less than 10 kt. Seas 2 ft.
.SUN...Variable wind less than 10 kt. Seas 2 ft.
.MON...NE wind 10 kt. Seas 2 ft.
.TUE...Variable wind less than 10 kt. Seas 2 ft.

$$

PKZ127-190030-
Valdez Narrows-
328 AM AKDT Fri Aug 18 2017

.TODAY...NE wind 10 kt becoming SW in the afternoon. Seas 2 ft.
Rain showers.
.TONIGHT...SW wind 10 kt becoming NE 15 kt after midnight.
Seas 3 ft. Rain showers.
.SAT...NE wind 15 kt becoming SW 10 kt in the afternoon. Seas 3 ft.
.SAT NIGHT...Variable wind 10 kt. Seas 2 ft.
.SUN THROUGH TUE...NE wind 10 kt. Seas 2 ft.

$$

PKZ128-190030-
Valdez Arm-
328 AM AKDT Fri Aug 18 2017

.TODAY...NE wind 10 kt in the morning becoming variable less than
10 kt. Seas 2 ft. Rain showers.
.TONIGHT...Variable wind less than 10 kt becoming NE 10 kt after
midnight. Seas 2 ft. Rain showers.
.SAT...NE wind 10 kt in the morning becoming variable less than 10 
kt. Seas 2 ft.
.SAT NIGHT...Variable wind less than 10 kt. Seas 2 ft.
.SUN THROUGH MON...NE wind 10 kt. Seas 2 ft.
.TUE...Variable wind less than 10 kt. Seas 2 ft.

$$

PKZ129-190030-
Passage Canal-
328 AM AKDT Fri Aug 18 2017

.TODAY...Variable wind less than 10 kt. Seas 2 ft. Rain.
.TONIGHT...E wind 10 kt in the evening becoming variable less than
10 kt. Seas 2 ft. Rain.
.SAT...Variable wind less than 10 kt. Seas 2 ft.
.SAT NIGHT...Variable wind less than 10 kt. Seas 2 ft.
.SUN THROUGH MON...E wind 10 kt. Seas 2 ft.
.TUE...W wind 10 kt. Seas 2 ft.

$$

PKZ130-190030-
West of Barren Islands including Kamishak Bay-
328 AM AKDT Fri Aug 18 2017

.TODAY...SE wind 15 kt. Seas 4 ft. Rain.
.TONIGHT...W wind 15 kt. Seas 3 ft.
.SAT...Variable wind 10 kt. Seas 2 ft.
.SAT NIGHT...Variable wind 10 kt. Seas 3 ft.
.SUN...N wind 15 kt. Seas 3 ft.
.MON...NW wind 20 kt. Seas 5 ft.
.TUE...NW wind 15 kt. Seas 4 ft.

$$

PKZ131-190030-
Barren Islands East-
328 AM AKDT Fri Aug 18 2017

.TODAY...S wind 15 kt. Seas 5 ft. Rain.
.TONIGHT...W wind 15 kt. Seas 5 ft.
.SAT...Variable wind 10 kt. Seas 5 ft.
.SAT NIGHT...Variable wind 10 kt. Seas 4 ft.
.SUN...NE wind 20 kt. Seas 5 ft.
.MON...NW wind 20 kt. Seas 5 ft.
.TUE...NW wind 15 kt. Seas 7 ft.

$$

PKZ132-190030-
Marmot Island to Sitkinak-
328 AM AKDT Fri Aug 18 2017

.TODAY...SW wind 20 kt. Seas 7 ft.
.TONIGHT...W wind 20 kt. Seas 7 ft.
.SAT...Variable wind 10 kt. Seas 5 ft.
.SAT NIGHT...Variable wind 10 kt. Seas 4 ft.
.SUN THROUGH MON...NW wind 25 kt. Seas 6 ft.
.TUE...NW wind 20 kt. Seas 7 ft.

$$

PKZ136-190030-
Chiniak Bay-
328 AM AKDT Fri Aug 18 2017

.TODAY...Variable wind less than 10 kt. Seas 1 ft.
.TONIGHT...Variable wind less than 10 kt. Seas 1 ft.
.SAT...Variable wind less than 10 kt becoming SE 10 kt in the
afternoon. Seas 1 ft building to 3 ft in the afternoon.
.SAT NIGHT...Variable wind less than 10 kt. Seas 2 ft.
.SUN THROUGH TUE...NW wind 15 kt. Seas 3 ft.

$$

PKZ137-190030-
Marmot Bay-
328 AM AKDT Fri Aug 18 2017

.TODAY...Variable wind less than 10 kt becoming SW 10 kt in the
afternoon. Seas 2 ft.
.TONIGHT...W wind 10 kt. Seas 2 ft.
.SAT...Variable wind less than 10 kt. Seas 2 ft.
.SAT NIGHT...Variable wind less than 10 kt. Seas 3 ft.
.SUN THROUGH TUE...NW wind 15 kt. Seas 3 ft.

$$

PKZ138-190030-
Shelikof Strait-
328 AM AKDT Fri Aug 18 2017

.TODAY...SW wind increasing to 20 kt. Seas 2 ft building to 5 ft in
the afternoon.
.TONIGHT...SW wind 20 kt in the evening becoming variable 10 kt.
Seas 5 ft.
.SAT...Variable wind 10 kt. Seas 2 ft.
.SAT NIGHT...Variable wind 10 kt. Seas 2 ft.
.SUN THROUGH MON...NW wind 20 kt. Seas 4 ft.
.TUE...W wind 15 kt. Seas 3 ft.

$$

PKZ139-190030-
Cook Inlet Kalgin island to Point Bede-
328 AM AKDT Fri Aug 18 2017

.TODAY...S wind 15 kt. Seas 3 ft. Rain.
.TONIGHT...NW wind 15 kt diminishing to 10 kt after midnight.
Seas 3 ft.
.SAT...Variable wind less than 10 kt. Seas 2 ft.
.SAT NIGHT...S wind 10 kt. Seas 2 ft.
.SUN THROUGH MON...N wind 15 kt. Seas 3 ft.
.TUE...NW wind 10 kt. Seas 2 ft.

$$

PKZ140-190030-
Cook Inlet North of Kalgin Island-
328 AM AKDT Fri Aug 18 2017

.TODAY...S wind 15 kt becoming W 10 kt in the afternoon. Seas 3 ft. 
Rain.
.TONIGHT...NE wind 10 kt. Seas 2 ft. Rain.
.SAT...Variable wind less than 10 kt. Seas 1 ft.
.SAT NIGHT...S wind 10 kt. Seas 2 ft.
.SUN THROUGH MON...N wind 15 kt. Seas 3 ft.
.TUE...N wind 10 kt. Seas 2 ft.

$$

PKZ141-190030-
Kachemak Bay-
328 AM AKDT Fri Aug 18 2017

.TODAY...E wind 10 kt becoming variable less than 10 kt in the 
afternoon. Seas 2 ft. Rain.
.TONIGHT...SW wind 10 kt in the evening becoming variable less
than 10 kt. Seas 2 ft.
.SAT...Variable wind less than 10 kt becoming SW 10 kt in the
afternoon. Seas 2 ft.
.SAT NIGHT...S wind 10 kt. Seas 2 ft.
.SUN THROUGH MON...N wind 15 kt. Seas 2 ft.
.TUE...NW wind 10 kt. Seas 2 ft.

$$
3 follow-up statements
415 
FZAK51 PAFC 182353
CWFAER

Coastal Waters Forecast
National Weather Service Anchorage Alaska
353 PM AKDT Fri Aug 18 2017

Coastal Waters Forecast for the Northern Gulf of Alaska Coast
up to 100 nm out including Kodiak Island and Cook Inlet.

Wind forecasts reflect the predominant speed and direction
expected. Sea forecasts represent an average of the highest
one-third of the combined wind wave and swell height.

PKZ197-191230-
353 PM AKDT Fri Aug 18 2017
.SYNOPSIS FOR THE NORTH GULF COAST+KODIAK ISLAND WATERS+
COOK INLET...

A 1004 mb low near Seward drifts to Middleton Island Sat morning at 
1004 mb then dissipates Sat night. Another front moves into the 
western Gulf Sat afternoon and reaches the northern Gulf by Sun 
morning.

$$

PKZ119-191230-
Cape Suckling to Cape Cleare-
353 PM AKDT Fri Aug 18 2017

...SMALL CRAFT ADVISORY TONIGHT...

.TONIGHT...W wind 15 kt except E 25 kt east of Montague Island along
the Gulf Coast. Seas 6 ft. Widespread rain showers.
.SAT...W wind 15 kt except E 20 kt to the east of Montague Island 
along the Gulf Coast. Seas 6 ft.
.SAT NIGHT...SE wind 15 kt. Seas 5 ft.
.SUN AND SUN NIGHT...NE wind 25 kt. Seas 6 ft.
.MON...NE wind 20 kt. Seas 7 ft.
.TUE...NE wind 15 kt. Seas 6 ft.
.WED...Variable wind 10 kt. Seas 4 ft.

$$

PKZ120-191230-
Cape Cleare to Gore Point-
353 PM AKDT Fri Aug 18 2017

.TONIGHT...N wind 15 kt. Seas 4 ft.
.SAT...NW wind 15 kt. Seas 4 ft.
.SAT NIGHT...Variable wind 10 kt. Seas 4 ft.
.SUN...E wind 15 kt. Seas 4 ft.
.SUN NIGHT...NE wind 20 kt. Seas 5 ft.
.MON THROUGH TUE...N wind 15 kt. Seas 6 ft.
.WED...Variable wind 10 kt. Seas 4 ft.

$$

PKZ121-191230-
Resurrection Bay-
353 PM AKDT Fri Aug 18 2017

.TONIGHT...Variable wind less than 10 kt. Seas 2 ft. Rain.
.SAT...Variable wind less than 10 kt becoming S 10 kt in the 
afternoon. Seas 2 ft.
.SAT NIGHT...S wind 10 kt in the evening becoming variable less
than 10 kt. Seas 2 ft.
.SUN AND SUN NIGHT...N wind 10 kt. Seas 2 ft.
.MON...N wind 15 kt. Seas 3 ft.
.TUE...N wind 10 kt. Seas 2 ft.
.WED...S wind 10 kt. Seas 2 ft.

$$

PKZ125-191230-
Prince William Sound-
353 PM AKDT Fri Aug 18 2017

.TONIGHT...E wind 20 kt. Seas 3 ft. Widespread rain showers.
.SAT...NE wind 10 kt. Seas 2 ft.
.SAT NIGHT...Variable wind less than 10 kt becoming NE 10 kt after
midnight. Seas 2 ft.
.SUN...E wind 20 kt. Seas 3 ft.
.SUN NIGHT...N wind 15 kt. Seas 3 ft.
.MON THROUGH TUE...N wind 10 kt. Seas 2 ft.
.WED...Variable wind less than 10 kt. Seas 2 ft.

$$

PKZ126-191230-
Port Valdez-
353 PM AKDT Fri Aug 18 2017

.TONIGHT...E wind less than 10 kt. Seas 2 ft. Widespread rain 
showers.
.SAT...SW wind less than 10 kt. Seas 2 ft.
.SAT NIGHT...E wind less than 10 kt. Seas 2 ft. Rain.
.SUN...Variable wind less than 10 kt. Seas 2 ft.
.SUN NIGHT...E wind 10 kt. Seas 2 ft.
.MON...NE wind 10 kt. Seas 2 ft.
.TUE...Variable wind less than 10 kt. Seas 2 ft.
.WED...Variable wind less than 10 kt. Seas 2 ft.

$$

PKZ127-191230-
Valdez Narrows-
353 PM AKDT Fri Aug 18 2017

.TONIGHT...SW wind 10 kt becoming NE 15 kt after midnight. Seas
3 ft. Widespread rain showers.
.SAT...NE wind 20 kt becoming SW 10 kt in the afternoon. Seas 3 ft.
.SAT NIGHT...SW wind 10 kt becoming NE after midnight. Seas 2 ft.
Rain.
.SUN...SW wind 10 kt. Seas 2 ft.
.SUN NIGHT...N wind 15 kt. Seas 3 ft.
.MON...NE wind 20 kt. Seas 3 ft.
.TUE...NE wind 10 kt. Seas 2 ft.
.WED...Variable wind 10 kt. Seas 2 ft.

$$

PKZ128-191230-
Valdez Arm-
353 PM AKDT Fri Aug 18 2017

.TONIGHT...Variable wind less than 10 kt becoming NE 10 kt after
midnight. Seas 2 ft. Widespread rain showers.
.SAT...NE wind 10 kt in the morning becoming SW 10 kt. Seas 2 ft.
.SAT NIGHT...NE wind 10 kt. Seas 2 ft. Rain.
.SUN...NE wind 10 kt. Seas 2 ft.
.SUN NIGHT...NE wind 15 kt. Seas 3 ft.
.MON...NE wind 20 kt. Seas 4 ft.
.TUE...Variable wind less than 10 kt. Seas 2 ft.
.WED...Variable wind less than 10 kt. Seas 2 ft.

$$

PKZ129-191230-
Passage Canal-
353 PM AKDT Fri Aug 18 2017

.TONIGHT...E wind 10 kt. Seas 2 ft. Widespread rain showers.
.SAT...Variable wind less than 10 kt. Seas 2 ft.
.SAT NIGHT...Variable wind less than 10 kt. Seas 2 ft. Rain.
.SUN...E wind 15 kt. Seas 2 ft.
.SUN NIGHT...W wind 10 kt. Seas 2 ft.
.MON...W wind 15 kt. Seas 2 ft.
.TUE...W wind 10 kt. Seas 2 ft.
.WED...Variable wind less than 10 kt. Seas 2 ft.

$$

PKZ130-191230-
West of Barren Islands including Kamishak Bay-
353 PM AKDT Fri Aug 18 2017

.TONIGHT...W wind 10 kt. Seas 3 ft.
.SAT...Variable wind 10 kt. Seas 2 ft.
.SAT NIGHT...Variable wind 10 kt. Seas 2 ft.
.SUN...Variable wind 10 kt. Seas 3 ft.
.SUN NIGHT...NW wind 20 kt. Seas 5 ft.
.MON...NW wind 25 kt. Seas 5 ft.
.TUE THROUGH WED...W wind 15 kt. Seas 4 ft.

$$

PKZ131-191230-
Barren Islands East-
353 PM AKDT Fri Aug 18 2017

.TONIGHT...Variable wind 10 kt. Seas 5 ft.
.SAT...W wind 15 kt. Seas 4 ft.
.SAT NIGHT...Variable wind 10 kt. Seas 4 ft.
.SUN...NE wind 15 kt. Seas 4 ft.
.SUN NIGHT...NW wind 25 kt. Seas 6 ft.
.MON...NW wind 25 kt. Seas 6 ft.
.TUE...NW wind 15 kt. Seas 7 ft.
.WED...W wind 15 kt. Seas 4 ft.

$$

PKZ132-191230-
Marmot Island to Sitkinak-
353 PM AKDT Fri Aug 18 2017

.TONIGHT...W wind 20 kt. Seas 6 ft.
.SAT...W wind 10 kt. Seas 6 ft.
.SAT NIGHT...Variable wind 10 kt. Seas 4 ft.
.SUN...N wind 15 kt. Seas 6 ft.
.SUN NIGHT...NW wind 25 kt. Seas 6 ft.
.MON...NW wind 25 kt. Seas 7 ft.
.TUE...NW wind 20 kt. Seas 7 ft.
.WED...W wind 15 kt. Seas 5 ft.

$$

PKZ136-191230-
Chiniak Bay-
353 PM AKDT Fri Aug 18 2017

.TONIGHT...Variable wind less than 10 kt. Seas 1 ft.
.SAT...Variable wind less than 10 kt. Seas 1 ft building to 3 ft
in the afternoon.
.SAT NIGHT...Variable wind less than 10 kt. Seas 2 ft.
.SUN...N wind 10 kt. Seas 2 ft.
.SUN NIGHT...NW wind 15 kt. Seas 2 ft.
.MON THROUGH TUE...NW wind 15 kt. Seas 2 ft.
.WED...SW wind 10 kt. Seas 2 ft.

$$

PKZ137-191230-
Marmot Bay-
353 PM AKDT Fri Aug 18 2017

.TONIGHT...W wind 10 kt in the evening becoming variable less than
10 kt. Seas 2 ft.
.SAT...Variable wind less than 10 kt. Seas 3 ft.
.SAT NIGHT...Variable wind less than 10 kt. Seas 3 ft.
.SUN...N wind 10 kt. Seas 2 ft.
.SUN NIGHT...NW wind 15 kt. Seas 2 ft.
.MON THROUGH TUE...NW wind 15 kt. Seas 2 ft.
.WED...SW wind 10 kt. Seas 2 ft.

$$

PKZ138-191230-
Shelikof Strait-
353 PM AKDT Fri Aug 18 2017

.TONIGHT...SW wind 20 kt in the evening diminishing to 10 kt. Seas 4
ft.
.SAT...Variable wind 10 kt. Seas 2 ft.
.SAT NIGHT...Variable wind 10 kt. Seas 1 ft.
.SUN...Variable wind 10 kt. Seas 3 ft.
.SUN NIGHT...NW wind 20 kt. Seas 4 ft.
.MON...NW wind 25 kt. Seas 5 ft.
.TUE...W wind 15 kt. Seas 3 ft.
.WED...Variable wind 10 kt. Seas 3 ft.

$$

PKZ139-191230-
Cook Inlet Kalgin island to Point Bede-
353 PM AKDT Fri Aug 18 2017

.TONIGHT...S wind 15 kt in the evening becoming variable less than
10 kt. Seas 3 ft.
.SAT...Variable wind less than 10 kt. Seas 2 ft.
.SAT NIGHT...SW wind 10 kt. Seas 2 ft.
.SUN...NE wind 10 kt. Seas 2 ft.
.SUN NIGHT...N wind 15 kt. Seas 5 ft.
.MON...N wind 15 kt. Seas 4 ft.
.TUE...NW wind 10 kt. Seas 2 ft.
.WED...Variable wind less than 10 kt. Seas 2 ft.

$$

PKZ140-191230-
Cook Inlet North of Kalgin Island-
353 PM AKDT Fri Aug 18 2017

.TONIGHT...Variable wind less than 10 kt. Seas 2 ft. Rain.
.SAT...Variable wind less than 10 kt. Seas 2 ft.
.SAT NIGHT...SW wind 10 kt in the evening becoming variable less
than 10 kt. Seas 2 ft.
.SUN...NE wind 10 kt. Seas 2 ft.
.SUN NIGHT...N wind 15 kt. Seas 3 ft.
.MON THROUGH TUE...N wind 10 kt. Seas 3 ft.
.WED...SW wind 10 kt. Seas 2 ft.

$$

PKZ141-191230-
Kachemak Bay-
353 PM AKDT Fri Aug 18 2017

.TONIGHT...S wind 10 kt in the evening becoming variable less than
10 kt. Seas 2 ft.
.SAT...Variable wind less than 10 kt. Seas 2 ft.
.SAT NIGHT...Variable wind less than 10 kt. Seas 2 ft.
.SUN...NE wind 10 kt. Seas 2 ft.
.SUN NIGHT...N wind 15 kt. Seas 2 ft.
.MON...N wind 15 kt. Seas 2 ft.
.TUE...NW wind 10 kt. Seas 2 ft.
.WED...Variable wind less than 10 kt. Seas 2 ft.

$$
176 
FZAK51 PAFC 191126
CWFAER

Coastal Waters Forecast
National Weather Service Anchorage Alaska
326 AM AKDT Sat Aug 19 2017

Coastal Waters Forecast for the Northern Gulf of Alaska Coast
up to 100 nm out including Kodiak Island and Cook Inlet.

Wind forecasts reflect the predominant speed and direction
expected. Sea forecasts represent an average of the highest
one-third of the combined wind wave and swell height.

PKZ197-200030-
326 AM AKDT Sat Aug 19 2017
.SYNOPSIS FOR THE NORTH GULF COAST+KODIAK ISLAND WATERS+
COOK INLET...

A 1005 mb low over Prince William Sound will dissipate by this
afternoon. A 1002 mb low will move to 210 NM south of Sitkinak 
Sun morning and strengthen to 992 mb as it moves to 150 NM south
of Prince William Sound late Sun.

$$

PKZ119-200030-
Cape Suckling to Cape Cleare-
326 AM AKDT Sat Aug 19 2017

...SMALL CRAFT ADVISORY TODAY AND SUNDAY...

.TODAY...W wind 20 kt. Along the coast...E wind 25 kt diminishing to
10 kt in the afternoon. Seas 6 ft.
.TONIGHT...SE wind 15 kt. Seas 5 ft.
.SUN...E wind 20 kt increasing to 30 kt in the afternoon. Seas 8 ft.
Rain.
.SUN NIGHT...E wind 35 kt. Seas 12 ft.
.MON...E wind 20 kt. Seas 7 ft.
.TUE...N wind 15 kt. Seas 5 ft.
.WED...Variable wind 10 kt. Seas 3 ft.

$$

PKZ120-200030-
Cape Cleare to Gore Point-
326 AM AKDT Sat Aug 19 2017

.TODAY...NW wind 15 kt. Seas 5 ft.
.TONIGHT...Variable wind 10 kt. Seas 4 ft.
.SUN...E wind 20 kt. Seas 5 ft. Rain.
.SUN NIGHT...NE wind 30 kt. Seas 7 ft.
.MON...NE wind 20 kt. Seas 6 ft.
.TUE...NW wind 15 kt. Seas 5 ft.
.WED...Variable wind 10 kt. Seas 4 ft.

$$

PKZ121-200030-
Resurrection Bay-
326 AM AKDT Sat Aug 19 2017

.TODAY...N wind 10 kt becoming S in the afternoon. Seas 2 ft.
.TONIGHT...S wind 10 kt in the evening becoming variable less than
10 kt. Seas 2 ft.
.SUN...Variable wind less than 10 kt. Seas 2 ft. Higher winds and
S of Caines Head. Rain.
.SUN NIGHT...N wind 15 kt. Seas 3 ft.
.MON...N wind 15 kt. Seas 3 ft.
.TUE...N wind 10 kt. Seas 2 ft.
.WED...S wind 10 kt. Seas 2 ft.

$$

PKZ125-200030-
Prince William Sound-
326 AM AKDT Sat Aug 19 2017

.TODAY...NE wind 15 kt diminishing to 10 kt in the afternoon.
Seas 3 ft.
.TONIGHT...Variable wind less than 10 kt becoming NE 15 kt after
midnight. Seas 3 ft.
.SUN...E wind 15 kt. Seas 3 ft. Rain.
.SUN NIGHT...N wind 20 kt. Seas 4 ft.
.MON...N wind 15 kt. Seas 3 ft.
.TUE...NW wind 10 kt. Seas 2 ft.
.WED...SE wind 10 kt. Seas 2 ft.

$$

PKZ126-200030-
Port Valdez-
326 AM AKDT Sat Aug 19 2017

.TODAY...Variable wind less than 10 kt. Seas 2 ft.
.TONIGHT...Variable wind less than 10 kt. Seas 2 ft. Rain showers.
.SUN...Variable wind less than 10 kt. Seas 2 ft. Rain.
.SUN NIGHT...Variable wind less than 10 kt. Seas 2 ft.
.MON...E wind 10 kt. Seas 2 ft.
.TUE...Variable wind less than 10 kt. Seas 2 ft.
.WED...Variable wind less than 10 kt. Seas 2 ft.

$$

PKZ127-200030-
Valdez Narrows-
326 AM AKDT Sat Aug 19 2017

.TODAY...NE wind 15 kt in the morning becoming variable less than
10 kt. Seas 3 ft.
.TONIGHT...Variable wind less than 10 kt becoming NE 15 kt after
midnight. Seas 3 ft. Rain showers.
.SUN...NE wind 15 kt in the morning becoming variable less than
10 kt. Seas 3 ft. Rain.
.SUN NIGHT...NE wind 15 kt. Seas 3 ft.
.MON...N wind 20 kt. Seas 3 ft.
.TUE...NE wind 10 kt. Seas 2 ft.
.WED...SW wind 10 kt. Seas 2 ft.

$$

PKZ128-200030-
Valdez Arm-
326 AM AKDT Sat Aug 19 2017

.TODAY...NE wind 20 kt in the morning becoming variable less than 10
kt. Seas 4 ft.
.TONIGHT...Variable wind less than 10 kt becoming NE 10 kt after
midnight. Seas 2 ft. Rain showers.
.SUN...NE wind 10 kt in the morning becoming variable less than
10 kt. Seas 2 ft. Rain.
.SUN NIGHT...NE wind 15 kt. Seas 3 ft.
.MON...NE wind 20 kt. Seas 4 ft.
.TUE...Variable wind less than 10 kt. Seas 2 ft.
.WED...Variable wind less than 10 kt. Seas 2 ft.

$$

PKZ129-200030-
Passage Canal-
326 AM AKDT Sat Aug 19 2017

.TODAY...Variable wind less than 10 kt. Seas 2 ft.
.TONIGHT...Variable wind less than 10 kt. Seas 2 ft.
.SUN...E wind 10 kt. Seas 2 ft. Rain.
.SUN NIGHT...Variable wind 10 kt. Seas 2 ft.
.MON...E wind 10 kt. Seas 2 ft.
.TUE...W wind 10 kt. Seas 2 ft.
.WED...E wind 10 kt. Seas 2 ft.

$$

PKZ130-200030-
West of Barren Islands including Kamishak Bay-
326 AM AKDT Sat Aug 19 2017

.TODAY...W wind 15 kt becoming Variable 10 kt in the afternoon. Seas
3 ft.
.TONIGHT...Variable wind 10 kt. Seas 2 ft.
.SUN...NE wind 15 kt. Seas 3 ft. Rain.
.SUN NIGHT...NW wind 20 kt. Seas 5 ft.
.MON...NW wind 25 kt. Seas 7 ft.
.TUE...W wind 20 kt. Seas 4 ft.
.WED...Variable wind 10 kt. Seas 3 ft.

$$

PKZ131-200030-
Barren Islands East-
326 AM AKDT Sat Aug 19 2017

.TODAY...W wind 15 kt. Seas 5 ft.
.TONIGHT...Variable wind 10 kt becoming SE 15 kt after midnight.
Seas 4 ft.
.SUN...E wind 20 kt. Seas 4 ft. Rain.
.SUN NIGHT...N wind 30 kt. Seas 8 ft.
.MON...N wind 30 kt. Seas 8 ft.
.TUE...NW wind 20 kt. Seas 4 ft.
.WED...Variable wind 10 kt. Seas 4 ft.

$$

PKZ132-200030-
Marmot Island to Sitkinak-
326 AM AKDT Sat Aug 19 2017

.TODAY...W wind 15 kt. Seas 7 ft.
.TONIGHT...Variable wind 10 kt. Seas 4 ft. Rain.
.SUN...NE wind 15 kt. Seas 6 ft. Rain.
.SUN NIGHT...NW wind 25 kt. Seas 7 ft.
.MON...NW wind 30 kt. Seas 9 ft.
.TUE...NW wind 20 kt. Seas 7 ft.
.WED...SW wind 15 kt. Seas 6 ft.

$$

PKZ136-200030-
Chiniak Bay-
326 AM AKDT Sat Aug 19 2017

.TODAY...Variable wind less than 10 kt. Seas 2 ft.
.TONIGHT...Variable wind less than 10 kt. Seas 2 ft. Rain.
.SUN...Variable wind less than 10 kt becoming N 15 kt in the
afternoon. Seas 3 ft. Rain.
.SUN NIGHT...NW wind 15 kt. Seas 2 ft.
.MON...NW wind 20 kt. Seas 3 ft.
.TUE...NW wind 10 kt. Seas 2 ft.
.WED...SW wind 10 kt. Seas 2 ft.

$$

PKZ137-200030-
Marmot Bay-
326 AM AKDT Sat Aug 19 2017

.TODAY...Variable wind less than 10 kt. Seas 3 ft.
.TONIGHT...Variable wind less than 10 kt. Seas 3 ft. Rain.
.SUN...Variable wind less than 10 kt becoming N 15 kt in the
afternoon. Seas 2 ft. Rain.
.SUN NIGHT...NW wind 20 kt. Seas 2 ft.
.MON...NW wind 25 kt. Seas 3 ft.
.TUE...NW wind 10 kt. Seas 2 ft.
.WED...SW wind 10 kt. Seas 2 ft.

$$

PKZ138-200030-
Shelikof Strait-
326 AM AKDT Sat Aug 19 2017

.TODAY...Variable wind 10 kt. Seas 2 ft.
.TONIGHT...Variable wind 10 kt. Seas 2 ft.
.SUN...N wind 15 kt. Seas 3 ft. Rain.
.SUN NIGHT...NW wind 20 kt. Seas 4 ft.
.MON...NW wind 25 kt. Seas 5 ft.
.TUE...W wind 15 kt. Seas 3 ft.
.WED...Variable wind 10 kt. Seas 3 ft.

$$

PKZ139-200030-
Cook Inlet Kalgin island to Point Bede-
326 AM AKDT Sat Aug 19 2017

.TODAY...Variable wind less than 10 kt. Seas 2 ft.
.TONIGHT...SW wind 10 kt. Seas 2 ft.
.SUN...NE wind 10 kt increasing to 15 kt in the afternoon. Seas
3 ft. Rain.
.SUN NIGHT...N wind 20 kt. Seas 5 ft.
.MON...N wind 15 kt. Seas 3 ft.
.TUE...W wind 10 kt. Seas 2 ft.
.WED...S wind 10 kt. Seas 2 ft.

$$

PKZ140-200030-
Cook Inlet North of Kalgin Island-
326 AM AKDT Sat Aug 19 2017

.TODAY...Variable wind less than 10 kt. Seas 1 ft.
.TONIGHT...SW wind 10 kt in the evening becoming variable less
than 10 kt. Seas 2 ft.
.SUN...NE wind 10 kt. Seas 2 ft. Rain.
.SUN NIGHT...N wind 15 kt. Seas 3 ft.
.MON...N wind 15 kt. Seas 3 ft.
.TUE...SW wind 10 kt. Seas 2 ft.
.WED...S wind 10 kt. Seas 2 ft.

$$

PKZ141-200030-
Kachemak Bay-
326 AM AKDT Sat Aug 19 2017

.TODAY...Variable wind less than 10 kt. Seas 2 ft.
.TONIGHT...Variable wind less than 10 kt. Seas 2 ft.
.SUN...Variable wind less than 10 kt becoming N 15 kt in the
afternoon. Seas 2 ft. Rain.
.SUN NIGHT...N wind 20 kt. Seas 3 ft.
.MON...N wind 20 kt. Seas 2 ft.
.TUE...NW wind 10 kt. Seas 2 ft.
.WED...Variable wind less than 10 kt. Seas 2 ft.

$$
803 
FZAK51 PAFC 192351
CWFAER

Coastal Waters Forecast
National Weather Service Anchorage Alaska
351 PM AKDT Sat Aug 19 2017

Coastal Waters Forecast for the Northern Gulf of Alaska Coast
up to 100 nm out including Kodiak Island and Cook Inlet.

Wind forecasts reflect the predominant speed and direction
expected. Sea forecasts represent an average of the highest
one-third of the combined wind wave and swell height.

PKZ197-201245-
351 PM AKDT Sat Aug 19 2017
.SYNOPSIS FOR THE NORTH GULF COAST+KODIAK ISLAND WATERS+
COOK INLET...

A 1005 mb low over Prince William Sound will dissipate Sunday
morning. A 998 mb low 200 NM south of Kodiak City Sunday morning 
will move to 150 NM northeast of Kodiak City and strengthen to 995
mb early Monday morning. The low will then weaken to 1000 mb and 
move to 250 NM southeast of Kodiak Mon evening.

$$

PKZ119-201245-
Cape Suckling to Cape Cleare-
351 PM AKDT Sat Aug 19 2017

...GALE WARNING SUNDAY NIGHT...

.TONIGHT...SW wind 10 kt becoming SE after midnight. Along the 
coast...SE wind 15 kt. Seas 5 ft. Rain.
.SUN...E wind 15 kt increasing to 30 kt. Seas 7 ft. Rain.
.SUN NIGHT...E wind 40 kt diminishing to 30 kt after midnight. Seas 
11 ft. Rain.
.MON...SE wind 25 kt. Seas 8 ft.
.MON NIGHT...E wind 15 kt. Seas 6 ft.
.TUE...N wind 15 kt. Seas 5 ft.
.WED...Variable wind 10 kt. Seas 3 ft.
.THU...SE wind 15 kt. Seas 6 ft.

$$

PKZ120-201245-
Cape Cleare to Gore Point-
351 PM AKDT Sat Aug 19 2017

...GALE WARNING SUNDAY NIGHT...

.TONIGHT...Variable wind 10 kt becoming E 15 kt after midnight.
Seas 4 ft. Rain.
.SUN...NE wind 25 kt. Seas 6 ft. Rain.
.SUN NIGHT...NE wind 35 kt. Seas 9 ft. Rain.
.MON...NE wind 25 kt. Seas 8 ft.
.MON NIGHT...NE wind 15 kt. Seas 6 ft.
.TUE...NW wind 15 kt. Seas 5 ft.
.WED...Variable wind 10 kt. Seas 4 ft.
.THU...Variable wind 10 kt. Seas 5 ft.

$$

PKZ121-201245-
Resurrection Bay-
351 PM AKDT Sat Aug 19 2017

.TONIGHT...S wind 10 kt in the evening becoming variable less than
10 kt. Seas 2 ft.
.SUN...Variable wind less than 10 kt. Seas 2 ft. Higher winds and
seas S of Caines Head. Rain.
.SUN NIGHT...N wind 15 kt. Seas 3 ft. Higher winds and seas S of 
Caines Head. Rain.
.MON...N wind 15 kt. Seas 3 ft.
.MON NIGHT...N wind 10 kt. Seas 2 ft.
.TUE...N wind 10 kt. Seas 2 ft.
.WED...S wind 10 kt. Seas 2 ft.
.THU...Variable wind less than 10 kt. Seas 2 ft.

$$

PKZ125-201245-
Prince William Sound-
351 PM AKDT Sat Aug 19 2017

.TONIGHT...NE wind 10 kt becoming E 15 kt after midnight. Seas 2 ft.
.SUN...NE wind 20 kt. Seas 3 ft. Highest winds and seas S of Seal
Island. Rain.
.SUN NIGHT...NE wind 20 kt. Seas 4 ft. Highest winds and seas S of 
Seal Island. Gusts to 35 kt near Hinchinbrook Entrance. Rain.
.MON...N wind 20 kt. Seas 3 ft.
.MON NIGHT...NE wind 10 kt. Seas 2 ft.
.TUE...NW wind 10 kt. Seas 2 ft.
.WED THROUGH THU...E wind 10 kt. Seas 2 ft.

$$

PKZ126-201245-
Port Valdez-
351 PM AKDT Sat Aug 19 2017

.TONIGHT...Variable wind less than 10 kt. Seas 2 ft. Rain showers.
.SUN...Variable wind less than 10 kt. Seas 2 ft. Rain.
.SUN NIGHT...E wind 10 kt. Seas 2 ft. Rain.
.MON...E wind 10 kt. Seas 2 ft.
.MON NIGHT...Variable wind less than 10 kt. Seas 2 ft.
.TUE...Variable wind less than 10 kt. Seas 2 ft.
.WED...Variable wind less than 10 kt. Seas 2 ft.
.THU...Variable wind less than 10 kt. Seas 2 ft.

$$

PKZ127-201245-
Valdez Narrows-
351 PM AKDT Sat Aug 19 2017

.TONIGHT...Variable wind less than 10 kt becoming NE 15 kt after
midnight. Seas 3 ft. Rain showers.
.SUN...NE wind 15 kt diminishing to 10 kt in the afternoon. Seas
3 ft. Rain.
.SUN NIGHT...NE wind 10 kt increasing to 15 kt after midnight. Seas 
3 ft. Rain.
.MON...NE wind 20 kt. Seas 3 ft.
.MON NIGHT...N wind 15 kt. Seas 3 ft.
.TUE...NE wind 10 kt. Seas 2 ft.
.WED...SW wind 10 kt. Seas 2 ft.
.THU...N wind 10 kt. Seas 2 ft.

$$

PKZ128-201245-
Valdez Arm-
351 PM AKDT Sat Aug 19 2017

.TONIGHT...Variable wind less than 10 kt becoming NE 10 kt after
midnight. Seas 2 ft. Rain showers.
.SUN...NE wind 10 kt. Seas 2 ft. Rain.
.SUN NIGHT...NE wind 10 kt increasing to 15 kt after midnight. Seas 
3 ft. Rain.
.MON...NE wind 20 kt. Seas 4 ft.
.MON NIGHT...NE wind 10 kt. Seas 2 ft.
.TUE...Variable wind less than 10 kt. Seas 2 ft.
.WED THROUGH THU...Variable wind less than 10 kt. Seas 2 ft.

$$

PKZ129-201245-
Passage Canal-
351 PM AKDT Sat Aug 19 2017

.TONIGHT...E wind 10 kt. Seas 2 ft.
.SUN...E wind 10 kt. Seas 2 ft. Rain.
.SUN NIGHT...Variable wind less than 10 kt. Seas 2 ft. Rain.
.MON...W wind 10 kt. Seas 2 ft.
.MON NIGHT...Variable wind less than 10 kt. Seas 2 ft.
.TUE...W wind 10 kt. Seas 2 ft.
.WED THROUGH THU...E wind 10 kt. Seas 2 ft.

$$

PKZ130-201245-
West of Barren Islands including Kamishak Bay-
351 PM AKDT Sat Aug 19 2017

...GALE WARNING SUNDAY NIGHT...

.TONIGHT...SE wind 15 kt. Seas 3 ft.
.SUN...N wind 20 kt. Seas 5 ft. Rain.
.SUN NIGHT...NW wind 35 kt. Seas 9 ft. Rain.
.MON...NW wind 30 kt. Seas 8 ft.
.MON NIGHT...NW wind 15 kt. Seas 3 ft.
.TUE...W wind 20 kt. Seas 4 ft.
.WED...Variable wind 10 kt. Seas 3 ft.
.THU...Variable wind 10 kt. Seas 3 ft.

$$

PKZ131-201245-
Barren Islands East-
351 PM AKDT Sat Aug 19 2017

...GALE WARNING SUNDAY NIGHT...

.TONIGHT...SE wind 10 kt. Seas 4 ft. Rain.
.SUN...E wind 20 kt. Seas 5 ft. Rain.
.SUN NIGHT...N wind 35 kt. Seas 9 ft. Rain showers.
.MON...NE wind 30 kt. Seas 9 ft.
.MON NIGHT...N wind 20 kt. Seas 6 ft.
.TUE...NW wind 15 kt. Seas 5 ft.
.WED...Variable wind 10 kt. Seas 4 ft.
.THU...SE wind 15 kt. Seas 5 ft.

$$

PKZ132-201245-
Marmot Island to Sitkinak-
351 PM AKDT Sat Aug 19 2017

...SMALL CRAFT ADVISORY SUNDAY NIGHT...

.TONIGHT...SE wind 15 kt. Seas 4 ft. Rain.
.SUN...NE wind 20 kt. Seas 6 ft. Rain.
.SUN NIGHT...NW wind 30 kt. Seas 8 ft. Rain.
.MON...NW wind 30 kt. Seas 9 ft.
.MON NIGHT...N wind 25 kt. Seas 8 ft.
.TUE...NW wind 20 kt. Seas 7 ft.
.WED THROUGH THU...SW wind 15 kt. Seas 6 ft.

$$

PKZ136-201245-
Chiniak Bay-
351 PM AKDT Sat Aug 19 2017

.TONIGHT...Variable wind less than 10 kt. Seas 3 ft. Rain.
.SUN...Variable wind less than 10 kt becoming N 10 kt in the
afternoon. Seas 3 ft. Rain.
.SUN NIGHT...NW wind 20 kt. Seas 3 ft. Rain showers.
.MON...NW wind 25 kt. Seas 4 ft.
.MON NIGHT...NW wind 20 kt. Seas 3 ft.
.TUE...NW wind 10 kt. Seas 2 ft.
.WED THROUGH THU...S wind 10 kt. Seas 2 ft.

$$

PKZ137-201245-
Marmot Bay-
351 PM AKDT Sat Aug 19 2017

...SMALL CRAFT ADVISORY SUNDAY NIGHT...

.TONIGHT...Variable wind less than 10 kt. Seas 3 ft.
.SUN...Variable wind less than 10 kt becoming N 15 kt in the
afternoon. Seas 3 ft. Rain.
.SUN NIGHT...NW wind 30 kt. Seas 4 ft. Rain showers.
.MON...NW wind 25 kt. Seas 4 ft.
.MON NIGHT...NW wind 20 kt. Seas 3 ft.
.TUE...NW wind 10 kt. Seas 2 ft.
.WED...SW wind 10 kt. Seas 2 ft.
.THU...SE wind 10 kt. Seas 3 ft.

$$

PKZ138-201245-
Shelikof Strait-
351 PM AKDT Sat Aug 19 2017

...SMALL CRAFT ADVISORY SUNDAY NIGHT...

.TONIGHT...Variable wind 10 kt. Seas 2 ft.
.SUN...N wind 20 kt. Seas 2 ft building to 5 ft in the afternoon.
Rain.
.SUN NIGHT...NW wind 25 kt. Seas 5 ft except 9 ft near the northern
entrance. Rain showers.
.MON...NW wind 25 kt. Seas 5 ft except 9 ft near the northern
entrance.
.MON NIGHT...NW wind 20 kt. Seas 6 ft.
.TUE...W wind 15 kt. Seas 3 ft.
.WED...Variable wind 10 kt. Seas 3 ft.
.THU...Variable wind 10 kt. Seas 2 ft.

$$

PKZ139-201245-
Cook Inlet Kalgin Island to Point Bede-
351 PM AKDT Sat Aug 19 2017

...SMALL CRAFT ADVISORY SUNDAY NIGHT...

.TONIGHT...SW wind 10 kt in the evening becoming variable less
than 10 kt. Seas 2 ft.
.SUN...NE wind 10 kt becoming N 20 kt in the afternoon. Seas 3 ft
building to 5 ft in the afternoon. Rain.
.SUN NIGHT...N wind 30 kt. Seas 8 ft. Rain.
.MON...N wind 25 kt. Seas 6 ft.
.MON NIGHT...N wind 10 kt. Seas 3 ft.
.TUE...W wind 10 kt. Seas 2 ft.
.WED...S wind 10 kt. Seas 2 ft.
.THU...NE wind 10 kt. Seas 2 ft.

$$

PKZ140-201245-
Cook Inlet North of Kalgin Island-
351 PM AKDT Sat Aug 19 2017

.TONIGHT...Variable wind less than 10 kt. Seas 2 ft.
.SUN...NE wind 10 kt increasing to 15 kt in the afternoon. Seas 2
ft building to 4 ft in the afternoon. Rain.
.SUN NIGHT...N wind 20 kt. Seas 5 ft. Rain.
.MON...NE wind 15 kt. Seas 4 ft.
.MON NIGHT...N wind 10 kt. Seas 2 ft.
.TUE THROUGH WED...S wind 10 kt. Seas 2 ft.
.THU...NE wind 10 kt. Seas 2 ft.

$$

PKZ141-201245-
Kachemak Bay-
351 PM AKDT Sat Aug 19 2017

...SMALL CRAFT ADVISORY SUNDAY NIGHT...

.TONIGHT...Variable wind less than 10 kt. Seas 2 ft.
.SUN...Variable wind less than 10 kt becoming N 20 kt in the
afternoon. Seas 2 ft. Rain.
.SUN NIGHT...N wind 30 kt. Seas 4 ft. Rain.
.MON...N wind 25 kt. Seas 3 ft.
.MON NIGHT...N wind 10 kt. Seas 2 ft.
.TUE...NW wind 10 kt. Seas 2 ft.
.WED...Variable wind less than 10 kt. Seas 2 ft.
.THU...E wind 10 kt. Seas 2 ft.

$$

What forecasters said that day

The local office's own words before this small craft advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Anchorage, AK wrote its last area forecast discussion before this small craft advisory went out at Aug 17, 4:54 PM AKDT, 10 hours 34 minutes earlier.

Area forecast discussion, Aug 17, 4:54 PM AKDT, 10 hours 34 minutes before
Southcentral and Southwest Alaska Forecast Discussion
National Weather Service Anchorage AK
454 PM AKDT Thu Aug 17 2017

.ANALYSIS AND UPPER LEVELS...

A broad upper level trough associated with relatively cold air
aloft is supporting widespread showers across much of the
Southcentral region. The sounding this morning indicated steep
lapse rates throughout the depth of much of the atmosphere and
near saturated conditions. This instability was confirmed by a
few lightning strikes near the Kenai Peninsula this morning.
Meanwhile high pressure maintains hold across the central and
western Bering.

&&

.MODEL DISCUSSION...

Models remain in good agreement in the short term with the strong
upper level forcing from the PV anomaly that now stretches across
much of the state. However, once more there is uncertainty in
where rainfall will develop this afternoon and evening across
Southcentral. While most models keep the majority of showers along
the mountains. However, high resolution models hint at the
possibility of a strengthening Turnagain Arm jet again this
evening, which would produce a convergence boundary with the
southwest low level jet over Anchorage.

&&

.SHORT TERM FORECAST SOUTHCENTRAL ALASKA (Days 1 and 2)...

Cold air aloft underneath an upper level low will continue to move
in over southcentral leading to a relatively unstable airmass. A
shortwave trough will push through the area this evening and will
act as a forcing mechanism to help initiate widespread rain
shower activity with periods of locally heavy rain across the
region. Rain showers will die down overnight into tomorrow morning
before another more vigorous shortwave trough digs down and
across the Southern Kenai Peninsula on Friday. Rain will spread
north and east up the Kenai and into the Prince William Sound as
well as into the Anchorage and Mat-Su areas by the late
afternoon/early evening hours.

Zonal flow sets-up behind the departing shortwave leading to
drier conditions for Saturday across most of the region, though
showers will develop again over the mountains in the afternoon.

&&

.SHORT TERM FORECAST SOUTHWEST ALASKA (Days 1 and 2)...
A wet and cloudy pattern persists through the upcoming weekend as
an upper level trough remains over the state. Periods of rain and
patchy fog are the biggest challenges for the upcoming weekend.
Showers are expected to be the prevailing precipitation pattern
as broad surface troughing lacks any notable focus. The airmass
across the southwest mainland is conditionally stable and will
likely have weak surface inversions set up during the late night
and early morning hours allowing patchy fog to develop.

The next potent shortwave develops across the Bering Strait on
Saturday and dives across the Kuskokwim Delta Saturday night with
rain developing along this dynamic set up. This wave moves
southeast through Sunday spreading rain across the valleys to the
western Alaska and Aleutian Ranges by Sunday afternoon.

&&

.SHORT TERM FORECAST BERING SEA/ALEUTIANS (Days 1 and 2)...
Low to mid level clouds continue to stream toward the Bering from
low pressure over the Arctic and from another low just south of
the central Aleutians. The ridge over the central Bering blocks
either low from tracking across and holds its position through
this weekend. Areas of fog develops across the stable air mass
associated with the ridge. The lowest visibilities are expected
during the late night and early morning hours, improving slightly
during the afternoon and evenings. Several upper level
disturbances dive south from the Arctic low along the eastern half
of the Bering which will bring light rain to the Pribilof Islands
and the Alaska Peninsula Sunday.

The low pressure currently south of the central Aleutians moves on
a slow easterly track through Saturday bringing rain to the Chain.
This system shoves southeast Saturday night with a building ridge
from the North Pacific amplifying across the western Bering
through Sunday.

&&

.LONG TERM FORECAST (Days 3 through 7)...
The active wet pattern remains intact through the long term
forecast period as we head through the middle of next week. There
in a North Pacific low tracking eastward parallel along the
Eastern Aleutians before it moves into the Gulf by Sunday
afternoon. This system remains almost stationary in the northern
Gulf before exiting into the lower eastern Gulf by Tuesday, and
then tracks into the North Pacific Ocean by Wednesday. The models
struggle with the timing as this low tracks along the Aleutian Chain
before entering the Gulf. Look for the bulk of the moisture to
remain along the northern Gulf coastal communities. Meanwhile, the
Bering Sea has a ridge of high pressure building into the region
before a North Pacific 997 mb low tracks near 45N 167E with an
associated front entering the Western Aleutians by Monday morning.
By Tuesday evening the high pressure moves southward, and the
aforementioned low moves into the western Bering. The models have
difficulty as this system tracks northward. The WPC keeps this
system as a broad area of low pressure, while the ECMWF has a more
consolidated system near Saint Matthew Island by Wednesday
evening. As we go into Thursday the WPC remains broad brushing
this system, but the ECMWF keeps it consolidated as it tracks into
the eastern Bering. Therefore, look for marine layer stratus/fog
with the high pressure ridge before transitioning to widespread
showery regime as the low pressure system enters the Bering. The
Southwest Alaska area will transition to an offshore drier flow
briefly before transitioning back to onshore flow by Tuesday. This
will advect marine layer stratus into the region with showery
regime setting up by Wednesday. Since there continues to be model
discrepancy with the timing/placement of the different synoptic
features, the forecast confidence will be barely average through
the long term forecast.

&&

.AFC WATCHES/WARNINGS/ADVISORIES...
PUBLIC...NONE.
MARINE...NONE.
FIRE WEATHER...NONE.

&&

SYNOPSIS AND MODEL DISCUSSION...ELN
SOUTHCENTRAL ALASKA...KVP
SOUTHWEST ALASKA/BERING SEA/ALEUTIANS...KH
LONG TERM...PD

The office that day

Everything else NWS Anchorage, AK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 18, 3:32 PM AKDTSmall Craft AdvisoryAFC12 hr

Nearby

Small Craft Advisories in Alaska, 2017Every small craft advisory in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.