Alert archive / Alaska / Gale Warnings in 2015
Gale Warning 375, NWS Anchorage, AK
NWS Anchorage, AK issued this gale warning at Apr 20, 2015, 3:01 PM AKDT. It was in force for 12 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Apr 20, 2015, 3:01 PM AKDT (23:01 UTC)
- Expired
- Apr 21, 2015, 3:30 AM AKDT
- In force
- 12 hr
- Issued by
- NWS Anchorage, AK
The text
As transmitted, in the capitals the NWS used until 2016.
762 FZAK51 PAFC 202301 CWFAER COASTAL WATERS FORECAST NATIONAL WEATHER SERVICE ANCHORAGE ALASKA 301 PM AKDT MON APR 20 2015 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. PKZ197-211130- 301 PM AKDT MON APR 20 2015 .SYNOPSIS FOR THE NORTH GULF COAST+KODIAK ISLAND WATERS+ COOK INLET... A NORTH PACIFIC LOW WILL TRACK TO 180 NM SOUTHEAST OF SITKINAK TUE NIGHT AT 980 MB. THIS LOW WILL THEN WEAKEN TO 989 MB AS IT MOVES TO 400 NM EAST-SOUTHEAST OF SITKINAK WED AFTERNOON. $$ PKZ119-211130- CAPE SUCKLING TO CAPE CLEARE- 301 PM AKDT MON APR 20 2015 ...SMALL CRAFT ADVISORY THROUGH TUESDAY NIGHT... .TONIGHT...W WIND 25 KT. SEAS 11 FT. .TUE...SW WIND 20 KT. SEAS 8 FT. RAIN AND SNOW. .TUE NIGHT...S WIND 20 KT IN THE MORNING BECOMING E 30 KT. SEAS 9 FT. SNOW AND RAIN. .WED...E WIND 35 KT. SEAS 15 FT. .WED NIGHT...NE WIND 30 KT. SEAS 16 FT. .THU...NE WIND 20 KT. SEAS 11 FT. .FRI THROUGH SAT...E WIND 20 KT. SEAS 7 FT. $$ PKZ120-211130- CAPE CLEARE TO GORE POINT- 301 PM AKDT MON APR 20 2015 ...SMALL CRAFT ADVISORY THROUGH TUESDAY NIGHT... .TONIGHT...W WIND 30 KT DIMINISHING TO 20 KT TOWARD MORNING. SEAS 10 FT. RAIN AND SNOW. .TUE...SW WIND 20 KT. SEAS 8 FT. RAIN. .TUE NIGHT...S WIND 20 KT IN THE MORNING BECOMING E 30 KT. SEAS 11 FT. RAIN AND SNOW. .WED...E WIND 35 KT. SEAS 16 FT. .WED NIGHT...NE WIND 30 KT. SEAS 16 FT. .THU...E WIND 20 KT. SEAS 11 FT. .FRI THROUGH SAT...NE WIND 20 KT. SEAS 7 FT. $$ PKZ121-211130- RESURRECTION BAY- 301 PM AKDT MON APR 20 2015 .TONIGHT...N WIND INCREASING TO 15 KT. SEAS 3 FT. HIGHER SEAS S OF CAINES HEAD. SNOW SHOWERS IN THE EVENING. .TUE...S WIND 10 KT. SEAS 2 FT. HIGHER SEAS S OF CAINES HEAD. SNOW AND RAIN. .TUE NIGHT...S WIND 15 KT BECOMING N 10 KT AFTER MIDNIGHT. SEAS 3 FT. HIGHER SEAS S OF CAINES HEAD. SNOW. .WED AND WED NIGHT...N WIND 10 KT. SEAS 2 FT. .THU THROUGH FRI...VARIABLE WIND 10 KT. SEAS 2 FT. .SAT...VARIABLE WIND 10 KT. SEAS 2 FT. $$ PKZ125-211130- PRINCE WILLIAM SOUND- 301 PM AKDT MON APR 20 2015 .TONIGHT...SW WIND 15 KT. SEAS 2 FT. RAIN AND SNOW. .TUE...S WIND 10 KT. SEAS 2 FT. SNOW AND RAIN. .TUE NIGHT...SE WIND 10 KT BECOMING E 20 KT AFTER MIDNIGHT. SEAS 4 FT. SNOW. .WED...NE WIND 20 KT. SEAS 4 FT. .WED NIGHT...N WIND 10 KT. SEAS 2 FT. .THU...NE WIND 15 KT. SEAS 3 FT. .FRI THROUGH SAT...NE WIND 15 KT. SEAS 3 FT. $$ PKZ126-211130- PORT VALDEZ- 301 PM AKDT MON APR 20 2015 .TONIGHT...W WIND 10 KT BECOMING VARIABLE LESS THAN 10 KT AFTER MIDNIGHT. SEAS 2 FT. SNOW AND RAIN. .TUE...VARIABLE WIND LESS THAN 10 KT BECOMING W 10 KT IN THE AFTERNOON. SEAS 2 FT. SNOW. .TUE NIGHT...W WIND 10 KT BECOMING VARIABLE LESS THAN 10 KT AFTER MIDNIGHT. SEAS 2 FT. .WED AND WED NIGHT...VARIABLE WIND LESS THAN 10 KT. SEAS 2 FT. .THU THROUGH SAT...VARIABLE WIND 10 KT. SEAS 2 FT. $$ PKZ127-211130- VALDEZ NARROWS- 301 PM AKDT MON APR 20 2015 .TONIGHT...VARIABLE WIND 10 KT BECOMING N AFTER MIDNIGHT. SEAS 2 FT. SNOW AND RAIN. .TUE...NE WIND 10 KT BECOMING S IN THE AFTERNOON. SEAS 2 FT. SNOW. .TUE NIGHT...VARIABLE WIND 10 KT BECOMING N AFTER MIDNIGHT. SEAS 2 FT. .WED...SW WIND 10 KT. SEAS 2 FT. .WED NIGHT AND THU...NE WIND 15 KT. SEAS 3 FT. .FRI...NE WIND 10 KT. SEAS 2 FT. .SAT...SW WIND 10 KT. SEAS 2 FT. $$ PKZ128-211130- VALDEZ ARM- 301 PM AKDT MON APR 20 2015 .TONIGHT...VARIABLE WIND 10 KT. SEAS 2 FT. SNOW AND RAIN. .TUE...VARIABLE WIND 10 KT. SEAS 2 FT. SNOW. .TUE NIGHT...VARIABLE WIND 10 KT BECOMING NE AFTER MIDNIGHT. SEAS 2 FT. SNOW. .WED AND WED NIGHT...NE WIND 10 KT. SEAS 2 FT. .THU THROUGH FRI...VARIABLE WIND 10 KT. SEAS 2 FT. .SAT...SW WIND 10 KT. SEAS 2 FT. $$ PKZ129-211130- PASSAGE CANAL- 301 PM AKDT MON APR 20 2015 .TONIGHT...VARIABLE WIND LESS THAN 10 KT BECOMING E 10 KT AFTER MIDNIGHT. SEAS 2 FT. SNOW AND RAIN. .TUE...E WIND 10 KT IN THE MORNING INCREASING TO 20 KT. SEAS 3 FT. SNOW. .TUE NIGHT...E WIND 20 KT. SEAS 3 FT. SNOW. .WED...E WIND 15 KT. SEAS 2 FT. .WED NIGHT...E WIND 10 KT. SEAS 2 FT. .THU...VARIABLE WIND LESS THAN 10 KT. SEAS 2 FT. .FRI AND SAT...E WIND 10 KT. SEAS 2 FT. $$ PKZ130-211130- WEST OF BARREN ISLANDS INCLUDING KAMISHAK BAY- 301 PM AKDT MON APR 20 2015 ...SMALL CRAFT ADVISORY TONIGHT AND TUESDAY NIGHT... .TONIGHT...SW WIND 25 KT. SEAS 6 FT. SNOW. .TUE...SE WIND 20 KT. SEAS 5 FT. RAIN AND SNOW. .TUE NIGHT...E WIND INCREASING TO 30 KT BY AFTERNOON. SEAS 9 FT. RAIN AND SNOW. .WED...NE WIND 30 KT. SEAS 8 FT. .WED NIGHT...E WIND 25 KT. SEAS 8 FT. .THU...E WIND 20 KT. SEAS 5 FT. .FRI...NE WIND 15 KT. SEAS 4 FT. .SAT...N WIND 15 KT. SEAS 4 FT. $$ PKZ131-211130- BARREN ISLANDS EAST- 301 PM AKDT MON APR 20 2015 ...GALE WARNING TUESDAY NIGHT... .TONIGHT...SW WIND 25 KT. SEAS 9 FT. .TUE...S WIND 25 KT. SEAS 8 FT. RAIN. .TUE NIGHT...SE WIND 25 KT BECOMING E 40 KT AFTER MIDNIGHT. SEAS 9 FT BUILDING TO 14 FT AFTER MIDNIGHT. RAIN AND SNOW. .WED...E WIND 35 KT. SEAS 17 FT. .WED NIGHT...E WIND 25 KT. SEAS 16 FT. .THU...E WIND 20 KT. SEAS 11 FT. .FRI...E WIND 20 KT. SEAS 7 FT. .SAT...NE WIND 20 KT. SEAS 6 FT. $$ PKZ132-211130- MARMOT ISLAND TO SITKINAK- 301 PM AKDT MON APR 20 2015 ...GALE WARNING TUESDAY NIGHT... .TONIGHT...SW WIND 25 KT. SEAS 9 FT. SNOW. .TUE...S WIND 25 KT. SEAS 9 FT. RAIN AND SNOW. .TUE NIGHT...SE WIND 30 KT INCREASING TO 40 KT AFTER MIDNIGHT. SEAS 13 FT BUILDING TO 19 FT IN THE AFTERNOON. RAIN. .WED...NE WIND 35 KT. SEAS 19 FT. .WED NIGHT...NE WIND 25 KT. SEAS 13 FT. .THU...S WIND 15 KT. SEAS 10 FT. .FRI...E WIND 15 KT. SEAS 7 FT. .SAT...NE WIND 20 KT. SEAS 6 FT. $$ PKZ136-211130- CHINIAK BAY- 301 PM AKDT MON APR 20 2015 ...GALE WARNING TUESDAY NIGHT... .TONIGHT...SW WIND 20 KT. SEAS 3 FT. .TUE...S WIND 20 KT. SEAS 4 FT. RAIN AND SNOW. .TUE NIGHT...E WIND 20 KT INCREASING TO 35 KT AFTER MIDNIGHT. SEAS 7 FT BUILDING TO 11 FT AFTER MIDNIGHT. RAIN AND SNOW. .WED...NE WIND 30 KT. SEAS 12 FT. .WED NIGHT...E WIND 15 KT. SEAS 6 FT. .THU...SE WIND 15 KT. SEAS 4 FT. .FRI...E WIND 10 KT. SEAS 3 FT. .SAT...NE WIND 15 KT. SEAS 3 FT. $$ PKZ137-211130- MARMOT BAY- 301 PM AKDT MON APR 20 2015 ...SMALL CRAFT ADVISORY TUESDAY NIGHT... .TONIGHT...SW WIND 20 KT. SEAS 3 FT. .TUE...S WIND 20 KT. SEAS 4 FT. RAIN. .TUE NIGHT...E WIND 20 KT IN THE EVENING INCREASING TO 30 KT. SEAS 7 FT IN THE EVENING BUILDING TO 12 FT. RAIN AND SNOW. .WED...NE WIND 30 KT. SEAS 11 FT. .WED NIGHT...E WIND 20 KT. SEAS 6 FT. .THU THROUGH FRI...E WIND 15 KT. SEAS 5 FT. .SAT...NE WIND 15 KT. SEAS 4 FT. $$ PKZ138-211130- SHELIKOF STRAIT- 301 PM AKDT MON APR 20 2015 ...SMALL CRAFT ADVISORY TONIGHT AND TUESDAY NIGHT... .TONIGHT...SW WIND 30 KT DIMINISHING TO 20 KT AFTER MIDNIGHT. SEAS 7 FT. SNOW. .TUE...S WIND 20 KT. SEAS 4 FT. RAIN AND SNOW. .TUE NIGHT...NE WIND 20 KT INCREASING TO 30 KT AFTER MIDNIGHT. SEAS 8 FT. RAIN AND SNOW. .WED...NE WIND 30 KT. SEAS 8 FT. .WED NIGHT...E WIND 25 KT. SEAS 6 FT. .THU...SE WIND 15 KT. SEAS 3 FT. .FRI THROUGH SAT...N WIND 15 KT. SEAS 4 FT. $$ PKZ139-211130- COOK INLET KALGIN ISLAND TO POINT BEDE- 301 PM AKDT MON APR 20 2015 ...SMALL CRAFT ADVISORY TUESDAY NIGHT... .TONIGHT...SW WIND 20 KT. SEAS 5 FT. SNOW. .TUE...S WIND 20 KT. SEAS 5 FT. SNOW AND RAIN. .TUE NIGHT...E WIND 15 KT BECOMING NE 25 KT AFTER MIDNIGHT. SEAS 5 FT. RAIN AND SNOW. .WED...NE WIND 25 KT. SEAS 6 FT. .WED NIGHT...NE WIND 20 KT. SEAS 5 FT. .THU THROUGH SAT...N WIND 15 KT. SEAS 4 FT. $$ PKZ140-211130- COOK INLET NORTH OF KALGIN ISLAND- 301 PM AKDT MON APR 20 2015 .TONIGHT...SW WIND 15 KT. SEAS 5 FT. .TUE...S WIND 10 KT IN THE MORNING BECOMING VARIABLE LESS THAN 10 KT. SEAS 3 FT. SNOW. .TUE NIGHT...E WIND 10 KT BECOMING NE 15 KT AFTER MIDNIGHT. SEAS 3 FT. SNOW AND RAIN. .WED...NE WIND 15 KT. SEAS 3 FT. .WED NIGHT...NE WIND 10 KT. SEAS 2 FT. .THU THROUGH SAT...N WIND 10 KT. SEAS 3 FT. $$ PKZ141-211130- KACHEMAK BAY- 301 PM AKDT MON APR 20 2015 ...SMALL CRAFT ADVISORY TUESDAY NIGHT... .TONIGHT...SW WIND 20 KT. GUSTS TO 30 KT IN THE EVENING. SEAS 6 FT. SNOW. .TUE...S WIND 20 KT. SEAS 3 FT. RAIN AND SNOW. .TUE NIGHT...E WIND 15 KT INCREASING TO 25 KT AFTER MIDNIGHT. SEAS 2 FT BUILDING TO 4 FT AFTER MIDNIGHT. RAIN AND SNOW. .WED...NE WIND 25 KT. SEAS 4 FT. .WED NIGHT...E WIND 10 KT. SEAS 2 FT. .THU THROUGH SAT...NE WIND 10 KT. SEAS 2 FT. $$
What forecasters said that day
The local office's own words before this gale warning 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 gale warning went out at Apr 20, 5:07 AM AKDT, 9 hours 54 minutes earlier.
Area forecast discussion, Apr 20, 5:07 AM AKDT, 9 hours 54 minutes before
SOUTHCENTRAL AND SOUTHWEST ALASKA FORECAST DISCUSSION NATIONAL WEATHER SERVICE ANCHORAGE AK 507 AM AKDT MON APR 20 2015 .ANALYSIS AND UPPER LEVELS... AN UPPER LEVEL CLOSED STACKED LOW IS POSITIONED NEAR NUNIVAK ISLAND WITH THE SURFACE LOW BEING REFLECTED JUST WEST OF THE AREA. THIS LOW HAS SEVERAL UPSTREAM SHORTWAVE TROUGHS AROUND THIS SYNOPTIC FEATURE. AN ASSOCIATED NEGATIVE TILTED TROUGH EXTENDS THROUGH THE SOUTHWEST ALASKA REGION INTO KODIAK ISLAND AND THE SOUTHWESTERN GULF. THE EASTERN GULF HAS A 100 KNOT SOUTHERLY JET STREAM POSITIONED THROUGH THE NORTHERN GULF EXTENDING THROUGH THE EASTERN COPPER RIVER BASIN. THE RADAR IMAGERY IS REFLECTING NUMEROUS RAIN SHOWERS IN THE NORTHERN GULF...PRINCE WILLIAM SOUND...EASTERN KENAI PENINSULA AND THROUGH COOK INLET INTO THE LOWER SUSITNA VALLEY. THE SURFACE TEMPERATURES FOR THE NORTHERN COASTAL AREAS ARE ALL IN THE UPPER 30S TO LOWER 40S. ASCAT SCATTEROMETER WIND IMAGERY IS SHOWING THE GULF WITH 20 KNOT SOUTHERLY FLOW AND NORTHWESTERLY FLOW OVER THE CHIRIKOF ISLANDS. OVER THE BERING SEA AND THE ALEUTIANS REGION...THERE IS A NORTHERLY 90 KNOT JET STREAM POSITION OVER THE WESTERN BERING. THIS JET STREAM TRANSITIONS TO A ZONAL FLOW WITH A 110 KNOT JET STREAM SOUTH OF THE CENTRAL TO EASTERN ALEUTIANS. THE COLD AIR ON THE BACKSIDE OF THE UPPER LEVEL LOW IS PRODUCING STRONG GUSTY WEST TO NORTHWESTERLY WINDS. THIS FEATURE IS ACCOMPANIED BY NUMEROUS SNOW SHOWERS IN THE BERING SEA AND ALONG THE ALEUTIAN CHAIN. && .MODEL DISCUSSION... ALL MODELS REMAIN IN GOOD AGREEMENT WITH THE SHORTWAVE TROUGH MOVING INTO THE WESTERN GULF AND A WEAK RIDGE OVER THE ALASKA PENINSULA EXTENDING INTO THE ALEUTIAN RANGE THIS MORNING. ON THE BERING SIDE THE MODELS ARE IN DECENT AGREEMENT WITH THE SURFACE LOW OVER SAINT MATTHEW ISLAND AND AN ASSOCIATED TROUGH EXTENDING ALONG THE SOUTHWEST ALASKA COASTLINE THIS MORNING. BY TUESDAY MORNING AN AMPLIFIED RIDGE BUILDS INTO THE GULF AND SOUTHCENTRAL. THE FORECAST CONFIDENCE IS AVERAGE WITH SOME UNCERTAINTY WITH THE TROUGH PUSHING THROUGH SOUTHCENTRAL AND THE AMOUNT OF SNOWFALL THE ANCHORAGE BOWL WILL RECEIVE TODAY. THE NAM WAS THE PREFERRED MODEL OF CHOICE FOR SOUTHCENTRAL. ACROSS SOUTHWEST ALASKA...THE GEM-REGIONAL WAS PREFERRED DUE TO BETTER HANDLING OF THE COLD AIR ON THE BACKSIDE OF THE LOW IN THE NORTHERN BERING SEA. && .SHORT TERM FORECAST SOUTHCENTRAL ALASKA (DAYS 1 AND 2)... THE ATMOSPHERE OVER SOUTHCENTRAL REMAINED VERY UNSTABLE OVERNIGHT AS THERE WERE NUMEROUS RAIN AND SNOW SHOWERS OVER THE AREA AND EVEN SOME LIGHTNING STRIKES DETECTED IN THE PRINCE WILLIAM SOUND REGION AS WELL AS IN THE NORTHWEST SUSITNA VALLEY NEAR THE HIGHER PEAKS OF THE ALASKA RANGE. A COLD FRONT PUSHING INTO THE REGION FROM THE SOUTHWEST WILL TURN PRECIPITATION TO ALL SNOW IN THE COOK INLET AND SUSITNA VALLEY REGIONS TODAY. TEMPERATURES WILL BE AT THEIR HIGHEST DURING THE EARLY MORNING OVER MUCH OF THE AREA FROM THE KENAI PENINSULA NORTHWARD DUE TO THIS FRONT. THE ATMOSPHERE BEHIND THIS FRONT WILL BE COLD ENOUGH FOR SNOW SO EVEN IF IT WARMS INTO THE 40S THE TEMPERATURE WILL DROP RAPIDLY WHEN A SNOW SHOWER MOVES OVERHEAD. THOSE TWO REASONS ARE WHY MOST AREAS WILL SEE HIGHS WELL ABOVE FREEZING YET STILL HAVE SNOW AS THE PRECIPITATION TYPE. && .SHORT TERM FORECAST SOUTHWEST ALASKA (DAYS 1 THROUGH 3)... DISTURBANCES WRAPPING AROUND THE MAIN CLOSED LOW CENTER OFF OF NUNIVAK ISLAND WILL SUPPORT ANOTHER ROUND OF SNOW SHOWERS OVER MOST OF SOUTHWEST TODAY AND TONIGHT. THERE IS ENOUGH INSTABILITY IN THE ATMOSPHERE TO SUPPORT ISOLATED THUNDERSTORMS ACROSS PORTIONS OF THE BRISTOL BAY AND THE LOWER KUSKOKWIM VALLEY. SNOW SHOWERS...REGION WIDE...MAY BECOME INTENSE AT TIMES WITH HEAVY SNOW SQUALLS AND BLOWING SNOW...AND WILL PERSIST INTO MONDAY NIGHT. FOR THIS REASON...A WINTER WEATHER ADVISORY WILL BE ISSUED FOR THE WESTERN CAPES...THE AREA WHERE THE STRONGEST WINDS AND POTENTIAL HEAVIEST SNOWFALL WILL BE. ON TUESDAY...THE ATMOSPHERE WILL SLOWLY STABILIZE...WITH SNOW SHOWERS BECOMING LESS WIDESPREAD AND INTENSE...ALTHOUGH ISOLATED INTENSE SHOWERS WILL STILL BE POSSIBLE DURING THE AFTERNOON...ESPECIALLY ACROSS THE BRISTOL BAY AND KUSKOKWIM DELTA REGIONS. SHOWERS WILL BEGIN TO DIMINISH TUESDAY EVENING ALTHOUGH SNOW THREATS WILL REMAIN ACROSS THE BRISTOL BAY AND LOWER KUSKOKWIM DELTA AS AN ELONGATED FRONTAL ZONE DEVELOPS INTO WEDNESDAY. THERE IS MUCH UNCERTAINTY WITH THE EXACT PLACEMENT OF THIS FRONT...BUT IT IS EXPECTED TO BE A RATHER NARROW ZONE OF POTENTIAL ACCUMULATING SNOW. && .SHORT TERM FORECAST BERING SEA/ALEUTIANS (DAYS 1 THROUGH 3)... DISTURBANCES WRAPPING AROUND A PARENT LOW NEAR NUNIVAK ISLAND WILL KEEP THE CENTRAL AND EASTERN BERING SEA/ALEUTIANS/PRIBILOF ISLANDS UNDER THE THREAT OF SNOW SHOWERS AND SQUALLS INTO MONDAY NIGHT BEFORE SHOWERS SLOWLY DIMINISH. A FAST MOVING WARM FRONT WILL TRACK FROM THE WESTERN ALEUTIANS TUESDAY AFTERNOON AND REACH THE EASTERN ALEUTIANS BY WEDNESDAY AFTERNOON...BRINGING LOW END GALE FORCE WINDS AND RAIN AND SNOW TO THE REGION. && .LONG TERM FORECAST (WEDNESDAY THROUGH SUNDAY)... THE LONG TERM FORECAST WILL BE HIGHLY DEPENDENT UPON SOME HIGH AMPLITUDE FEATURES EXTENDING FROM KAMCHATKA INTO THE GULF OF ALASKA. ON WEDNESDAY...TWO AREA OF LOW PRESSURES...ONE OVER THE GULF OF ALASKA AND THE OTHER OVER THE WESTERN BERING SEA...WILL BOTH BRING GALE FORCE WINDS TO THOSE LOCATIONS. THE LOW OVER THE SOUTHERN GULF OF ALASKA WILL BE QUICK TO DISSIPATE AS THE LOW OVER THE WESTERN BERING SEA BARRELS EASTWARD AND ABSORBS THE REMNANTS OF THE GULF LOW ON THURSDAY. MODEL AGREEMENT CONTINUES TO INCREASE WITH THESE TWO LOWS ALTHOUGH MODELS HAVE SPED THE SYSTEMS UP BY ABOUT 12 HOURS DUE TO A SLIGHTLY LESS AMPLIFIED PATTERN. A JET STREAK ON FRIDAY WILL HELP TO AMPLIFY THE LONGWAVE TROUGHING DEVELOPING AS THE INITIAL LOW OVER KAMCHATKA ELONGATES AND GETS TRAPPED ON THE EAST SIDE BY A BUILDING PACIFIC NORTH AMERICAN RIDGE. PREVIOUS MODEL RUNS HINTED AT THIS RIDGE NOSING ACROSS ALASKA BUT NOW IT LOOKS LIKE IT WILL STAY EAST OF ALASKA DUE TO THE TRACK OF THE UPPER LEVEL LOW. A SECOND KAMCHATKA LOW WILL PUSH OFF THE PENINSULA ON SATURDAY AND TAKE A SIMILAR PATH TO THE ONE OBSERVED MIDWEEK. OVERALL...THE SYNOPTIC PATTERN DOES NOT LOOK TO CHANGE MUCH IN THE COMING 7 TO 10 DAYS AS THE JET STREAM CONTINUES TO STAY OVER THE NORTH PACIFIC. && .AFC WATCHES/WARNINGS/ADVISORIES... PUBLIC...WINTER WEATHER ADVISORY 161. MARINE...GALE 165 178. FIRE WEATHER...NONE. && SYNOPSIS AND MODEL DISCUSSION...PD SOUTHCENTRAL ALASKA...EZ SOUTHWEST ALASKA/BERING SEA/ALEUTIANS...JRA LONG TERM...MC
The office that day
Everything else NWS Anchorage, AK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 20, 3:53 AM AKDT | Gale Warning | AFC | 7 days | |
| Apr 20, 3:53 AM AKDT | Small Craft Advisory | AFC | 24 hr | |
| Apr 20, 5:01 AM AKDT | Winter Weather Advisory | AFC | 7 hr | |
| Apr 20, 6:42 AM AKDT | Gale Warning | AFC | 21 hr | |
| Apr 20, 6:42 AM AKDT | Small Craft Advisory | AFC | 8 hr | |
| Apr 20, 7:31 AM AKDT | Gale Warning | AFC | 31 hr | |
| Apr 20, 2:48 PM AKDT | Gale Warning | AFC | 18 hr | |
| Apr 20, 3:01 PM AKDT | Small Craft Advisory | AFC | 12 hr | |
| Apr 20, 3:07 PM AKDT | Gale Warning | AFC | 48 hr | |
| Apr 20, 3:16 PM AKDT | Gale Warning | AFC | 8 days | |
| Apr 20, 3:16 PM AKDT | Small Craft Advisory | AFC | 13 hr |
Nearby
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.