Storm Warning 185, NWS Anchorage, AK

000 
FZAK62 PAFC 171518 CCA
OFFALU

OFFSHORE WATERS FORECAST...CORRECTED
NATIONAL WEATHER SERVICE ANCHORAGE AK
615 AM AKST TUE DEC 17 2013

CORRECTED SYNOPSIS

OFFSHORE WATERS FORECAST FOR THE BERING SEA

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.

PKZ499-180300-
400 AM AKST TUE DEC 17 2013
.SYNOPSIS FOR CENTRAL BERING SEA...

A WEATHER FRONT FROM A NORTH PACIFIC LOW MOVES ACROSS THE ALEUTIANS
TODAY. A 976 MB LOW DEVELOPS WED MORNING NEAR 50N 176W AND DRIFTS TO
50N 178W AT 982 MB BY THU MORNING. A SECOND LOW DEVELOPS WED
AFTERNOON NEAR 55N 165W AND MOVES ONSHORE NEAR BRISTOL BAY THU
MORNING.

$$

PKZ411-180300-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE
400 AM AKST TUE DEC 17 2013

...GALE WARNING THROUGH WEDNESDAY...

.TODAY...E WIND 25 TO 35 KT. SEAS 8 TO 14 FT. PATCHY FOG. 
.TONIGHT...NE WIND 35 TO 45 KT. SEAS 14 TO 21 FT. PATCHY FOG. 
.WED...NE WIND 45 KT. SEAS 19 TO 25 FT. PATCHY FOG. 
.WED NIGHT AND THU...NE WIND 45 KT. SEAS 25 FT. 
.FRI...N WIND 25 KT. SEAS 16 FT. 
.SAT...NE WIND 25 KT. SEAS 9 FT. 

$$

PKZ412-180300-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N
400 AM AKST TUE DEC 17 2013

...GALE WARNING TONIGHT AND WEDNESDAY...

.TODAY...SE WIND 15 TO 25 KT. SEAS 6 FT. PATCHY FOG. 
.TONIGHT...E WIND 30 TO 40 KT. SEAS 9 TO 14 FT. PATCHY FOG. 
.WED...NE WIND 45 KT. SEAS 16 TO 21 FT. PATCHY FOG. 
.WED NIGHT...NE WIND 40 KT. SEAS 20 FT. 
.THU...NE WIND 40 KT. SEAS 18 FT. 
.FRI...N WIND 30 KT. SEAS 14 FT. 
.SAT...N WIND 20 KT. SEAS 8 FT.  

$$

PKZ413-180300-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N
400 AM AKST TUE DEC 17 2013

...STORM WARNING TONIGHT...

.TODAY...E WIND 25 TO 35 KT. SEAS 9 TO 14 FT. PATCHY FOG. 
.TONIGHT...E WIND 40 KT BECOMING NE 50 KT AFTER MIDNIGHT. SEAS 15 FT
BUILDING TO 22 FT. PATCHY FOG. SNOW AND RAIN. 
.WED...NE WIND 45 KT. SEAS 24 FT. E OF 175W...NE WIND 45 KT BECOMING
SE 20 KT IN THE AFTERNOON. SEAS 24 FT SUBSIDING TO 15 FT. PATCHY FOG.
RAIN AND SNOW. 
.WED NIGHT...NE WIND 45 KT. SEAS 23 FT. 
.THU...NE WIND 40 KT. SEAS 20 FT. 
.FRI...N WIND 35 KT. SEAS 18 FT. 
.SAT...NE WIND 20 KT. SEAS 10 FT.  

$$

PKZ414-180300-
BERING SEA OFFSHORE EAST OF 171W
400 AM AKST TUE DEC 17 2013

...STORM WARNING TONIGHT...

.TODAY...SE WIND 20 TO 30 KT. SEAS 5 TO 9 FT. PATCHY FOG. FREEZING
SPRAY. 
.TONIGHT...E WIND 35 KT. SEAS 11 FT. S OF 56N...E WIND 40 KT
INCREASING TO 50 KT AFTER MIDNIGHT. SEAS 12 FT BUILDING TO 18 FT.
PATCHY FOG. RAIN.
.WED...E WIND 40 KT. SEAS 15 FT. S OF 56N...E WIND 40 KT BECOMING S
20 KT IN THE AFTERNOON. SEAS 17 FT SUBSIDING TO 11 FT. PATCHY FOG.
SNOW AND RAIN. 
.WED NIGHT...E WIND 35 KT. SEAS 12 FT. 
.THU...E WIND 30 KT. SEAS 10 FT. 
.FRI...N WIND 25 KT. SEAS 11 FT. 
.SAT...NW WIND 20 KT. SEAS 9 FT. 

$$

000 
FZAK62 PAFC 180041
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 PM AKST TUE DEC 17 2013

OFFSHORE WATERS FORECAST FOR THE BERING SEA

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.

PKZ499-181500-
400 PM AKST TUE DEC 17 2013
.SYNOPSIS FOR CENTRAL BERING SEA...

A WEATHER FRONT ALONG THE ALEUTIAN ISLANDS WILL PUSH INTO THE BERING
SEA WED. A 975 MB LOW WILL DEVELOP NEAR 51N 178W TUE NIGHT AND REMAIN
NEARLY STATIONARY BEFORE BEING ABSORBED INTO A 977 MB LOW NEAR 48N
175W THU AFTERNOON. A 979 MB LOW WILL DEVELOP NEAR 54N 166W WED
MORNING AND MOVE INLAND NEAR 59N 160W AT 990 MB WED NIGHT.

$$

PKZ411-181500-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE
400 PM AKST TUE DEC 17 2013

...STORM WARNING WEDNESDAY...

.TONIGHT...NE WIND 25 TO 45 KT. SEAS 17 FT. PATCHY FOG. 
.WED...NE WIND 35 TO 50 KT. SEAS 24 FT. PATCHY FOG. 
.WED NIGHT...NE WIND 35 TO 45 KT. SEAS 24 FT. PATCHY FOG. 
.THU...NE WIND 40 KT. SEAS 23 FT. 
.THU NIGHT...NE WIND 40 KT. SEAS 20 FT. 
.FRI...N WIND 30 KT. SEAS 16 FT. 
.SAT...NE WIND 25 KT. SEAS 9 FT.
.SUN...NE WIND 30 KT. SEAS 11 FT.  

$$

PKZ412-181500-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N
400 PM AKST TUE DEC 17 2013

...GALE WARNING THROUGH WEDNESDAY NIGHT...

.TONIGHT...E WIND 10 TO 30 KT INCREASING TO 20 TO 40 KT AFTER
MIDNIGHT. SEAS 13 FT. PATCHY FOG. 
.WED...NE WIND 35 TO 45 KT. SEAS 20 FT. PATCHY FOG. 
.WED NIGHT...NE WIND 30 TO 40 KT. SEAS 21 FT. PATCHY FOG. 
.THU...NE WIND 35 KT. SEAS 18 FT. 
.THU NIGHT...NE WIND 35 KT. SEAS 15 FT. 
.FRI...N WIND 35 KT. SEAS 13 FT. 
.SAT...N WIND 20 KT. SEAS 8 FT. 
.SUN...NE WIND 30 KT. SEAS 9 FT.  

$$

PKZ413-181500-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N
400 PM AKST TUE DEC 17 2013

...STORM WARNING THROUGH WEDNESDAY...

.TONIGHT...E WIND 30 TO 40 KT INCREASING TO 40 TO 50 KT AFTER
MIDNIGHT. SEAS 21 FT. PATCHY FOG. RAIN AND SNOW. 
.WED...NE WIND 35 TO 50 KT. SEAS 25 FT. PATCHY FOG. RAIN AND SNOW. 
.WED NIGHT...E WIND 25 TO 45 KT. SEAS 24 FT. PATCHY FOG. RAIN AND
SNOW. 
.THU...NE WIND 40 KT. SEAS 21 FT. 
.THU NIGHT...NE WIND 40 KT. SEAS 20 FT. 
.FRI...N WIND 40 KT. SEAS 19 FT. 
.SAT...NE WIND 20 KT. SEAS 10 FT. 
.SUN...E WIND 30 KT. SEAS 9 FT.  

$$

PKZ414-181500-
BERING SEA OFFSHORE EAST OF 171W
400 PM AKST TUE DEC 17 2013

...GALE WARNING THROUGH WEDNESDAY NIGHT...

.TONIGHT...E WIND 15 TO 35 KT INCREASING TO 25 TO 45 KT AFTER
MIDNIGHT. SEAS 13 FT. PATCHY FOG. SNOW AND RAIN. 
.WED...E WIND 30 TO 45 KT. SEAS 16 FT. PATCHY FOG. SNOW AND RAIN. 
.WED NIGHT...NE WIND 20 TO 35 KT. SEAS 16 FT. PATCHY FOG. RAIN AND
SNOW. 
.THU...NE WIND 25 KT. SEAS 11 FT. 
.THU NIGHT...NE WIND 30 KT. SEAS 10 FT. 
.FRI...N WIND 30 KT. SEAS 11 FT. 
.SAT...NW WIND 20 KT. SEAS 9 FT.
.SUN...E WIND 25 KT. SEAS 8 FT.  

$$

SOUTHCENTRAL AND SOUTHWEST ALASKA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ANCHORAGE AK
500 PM AKST MON DEC 16 2013

.ANALYSIS AND UPPER LEVELS...

UPPER LEVEL PLANETARY TROUGH EXTENDS FROM EASTERN RUSSIA TO SE AK
THIS MORNING...WITH SMALLER TROUGHS EXTENDING TO THE KAMCHATKA
PENINSULA AND FROM YAKUTAT SOUTHWEST ACROSS THE GULF OF ALASKA. A
WEAK UPPER LEVEL RIDGE IS OVER THE BERING AND WESTERN AK. A JET IS
FOCUSED ON THE NORTHEAST GULF AT IT MOVES INTO CANADA. AT THE
SURFACE...A LOW IS WEAKENING OVER THE NORTHERN GULF AS A SECOND LOW
APPROACHES SOUTHEAST AK. HIGH PRESSURE DOMINATES INTERIOR AK AND THE
EASTERN HALF OF THE BERING. THE NEXT SIGNIFICANT WEATHER FEATURE...A
LOW AROUND 40N 170E...IS SENDING AN ASSOCIATED FRONT TO THE
ALEUTIANS.

.MODEL DISCUSSION...

MODELS AGREE THAT THE WEAKENING LOW OVER THE GULF WILL DRIFT EAST
TONIGHT...AND INCREASE THE PRESSURE GRADIENT OVER PORTIONS OF SOUTH
CENTRAL AS HIGH PRESSURE CONTINUES TO BUILD OVER THE INTERIOR. THIS
GRADIENT WILL DIMINISH AS HIGH PRESSURE BUILDS OVER THE GULF
BEGINNING MON AFTERNOON AND LASTING INTO WED.

IN THE MEANTIME...THE FRONT APPROACHING THE ALEUTIANS WILL ARRIVE TUE
MORNING. A TRIPLE POINT LOW WILL FORM TUE EVENING NEAR ADAK...AND A
SECOND TRIPLE POINT WILL FORM A LOW ON A FRONT NEAR THE AKPEN WED
AFTERNOON. AS HIGH PRESSURE WEAKENS OVER THE GULF...THE LOW AND
ASSOCIATED FRONT WILL MOVE INTO THE GULF WED NIGHT...WITH THE FRONT
REACHING THE NORTH GULF COAST WED NIGHT...AND THE LOW ITSELF ON FRI.

.SHORT TERM FORECAST...

IN THE WEST...LINGERING SNOW SHOWERS OFF THE BERING WILL END AS THE
INFLUENCE OF THE FRONT TAKES OVER TONIGHT. E TO SE GALE TO STORM
FORCE WIND WILL AFFECT MUCH OF THE CHAIN TUE INTO WED...WITH SNOW
CHANGING TO RAIN BEGINNING TUE AFTERNOON. SHOWERS AND GALES CAN THEN
BE EXPECTED THROUGH THU AS REMNANT LOWS CONSOLIDATE AND MAINTAIN
CYCLONIC FLOW THROUGH THAT TIME.

FOR SW AK....COLD AND GENERALLY CLEAR CONDITIONS WILL PERSIST UNTIL
THE FRONT ARRIVES TUE NIGHT INTO WED WITH WIND AND SNOW. AS WARM AIR
ARRIVES WED NIGHT INTO THU...SNOW WILL CHANGE OVER TO RAIN...WITH
SOME FREEZING RAIN POSSIBLE WHERE COLD AIR IS TRAPPED IN VALLEYS.

SOUTH AND EAST OF THE AK RANGE...CLEAR AND COLD CONDITIONS WITH WIND
AND SNOW COMBINING FOR A THOMPSON PASS BLIZZARD WARNING THROUGH TUE
AFTERNOON...AND STRONG WINDS THROUGH CHANNELED TERRAIN FOR SEWARD AND
WHITTIER. BY TUE AFTERNOON THE GRADIENT SHOULD RELAX AND END THE
WIND. THE BERING FRONT WILL ARRIVE OVER KODIAK WED AND REACH THE
NORTH GULF COAST THU WITH GALE TO STORM FORCE WINDS WED NIGHT INTO
THU. SNOW WILL ACCOMPANY THE FRONT...REACHING THE NORTH GULF COAST
WED AFTERNOON AND MOVING INLAND WED NIGHT THROUGH THU. ANY MIXING
WITH RAIN AT SEA LEVEL WILL BE LIMITED TO PORTIONS OF PRINCE WILLIAM
SOUND LATER ON THU.

.LONG TERM FORECAST...

IN THE WEST...RAIN AND SNOW SHOWERS WILL SWITCH OVER TO ALL SNOW BY
SAT...AND THEN ANOTHER WEATHER FRONT ARRIVES SUN OVER THE WESTERN
ALEUTIANS WITH ANOTHER ROUND OF SNOW FOR THE CHAIN...WHICH REACHES SW
AK BY MON. SE OF THE AK RANGE WILL HAVE MAINLY PERIODS OF SNOW
THROUGH THE BEGINNING OF NEXT WEEK,

.AER/ALU...WATCH/WARNING SUMMARY
PUBLIC...BLIZZARD WARNING 131
MARINE...HEAVY FREEZING SPRAY 121 126 127 128 129 130 138 141 150
         GALES 127 131 155 165 170 171 172 178 179
         STORMS 173 174 175 176 177
FIRE WEATHER...NONE

DS DEC 13