Freeze Warning 2, NWS Anchorage, AK

610 
WWAK71 PAFC 101235
NPWAER

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE ANCHORAGE AK
435 AM AKDT MON SEP 10 2012

AKZ101-111-101800-
/X.CON.PAFC.FZ.W.0002.000000T0000Z-120910T1800Z/
ANCHORAGE-MATANUSKA VALLEY-
INCLUDING THE CITIES OF...ANCHORAGE...EAGLE RIVER...INDIAN...
EKLUTNA...PALMER...WASILLA...SUTTON...CHICKALOON
435 AM AKDT MON SEP 10 2012

...FREEZE WARNING REMAINS IN EFFECT UNTIL 10 AM AKDT THIS MORNING
FOR ANCHORAGE AND THE MATANUSKA VALLEY...

* LOCATION...ANCHORAGE...EAGLE RIVER AND THE MATANUSKA VALLEY.
  AREAS OF ANCHORAGE RIGHT ALONG THE INLET ARE NOT INCLUDED AND
  WILL REMAIN ABOVE FREEZING.

* TEMPERATURES...RANGING FROM 26 TO 32 DEGREES.

* TIMING...TEMPERATURES WILL CONTINUE TO FALL THROUGH AROUND 8 AM
  AND THEN RISE ABOVE FREEZING BY 10 AM.

* IMPACTS...PLANTS SENSITIVE TO FREEZING TEMPERATURES SHOULD BE 
  MOVED INDOORS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR
HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER
SENSITIVE VEGETATION.

&&

$$

551 
WWAK71 PAFC 101800
NPWAER

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE ANCHORAGE AK
1000 AM AKDT MON SEP 10 2012

AKZ101-111-101900-
/X.EXP.PAFC.FZ.W.0002.000000T0000Z-120910T1800Z/
ANCHORAGE-MATANUSKA VALLEY-
INCLUDING THE CITIES OF...ANCHORAGE...EAGLE RIVER...INDIAN...
EKLUTNA...PALMER...WASILLA...SUTTON...CHICKALOON
1000 AM AKDT MON SEP 10 2012

...FREEZE WARNING HAS EXPIRED FOR ANCHORAGE AND THE MATANUSKA
VALLEY...


$$

SOUTHCENTRAL AND SOUTHWEST ALASKA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ANCHORAGE AK
500 AM AKDT SUN SEP 9 2012

.ANALYSIS AND UPPER LEVELS..
AN UPPER LEVEL LOW IS OVER THE EASTERN GULF WITH ANOTHER OVER THE
EXTREME WESTERN BERING. BETWEEN THESE SYSTEMS A BROAD UPPER RIDGE
EXPANDS OVER SOUTHWEST ALASKA TO THE WESTERN ALEUTIANS. AT THE
SURFACE SCATTERED RAIN SHOWERS CONTINUE EAST OF A LOW THAT IS SOUTH
OF YAKUTAT IN THE EASTERN GULF...WITH A FEW SHOWERS ALONG THE
BACKSIDE IN THE CENTRAL GULF.

.MODEL DISCUSSION...
MODELS ARE IN FAIR AGREEMENT THROUGH THE SHORT TERM. THERE ARE ONLY
MINOR DIFFERENCES OF THE STRENGTH OF THE NEXT STORM SYSTEM THAT WILL
MOVE INTO SOUTHWEST ALASKA TUESDAY NIGHT. HOWEVER...THE MODELS ARE
OUT OF PHASE OVER THE BERING BEYOND WEDNESDAY CREATING GREATER
UNCERTAINTY FOR THE LONG TERM FORECAST. THE FORECAST UTILIZED THE GFS
IN THE SHORT TERM AND HPC GUIDANCE IN THE EXTENDED.

.ANALYSIS AND UPPER LEVELS...
THE CURRENT UPPER LOW OFF THE EASTERN BERING WILL CONTINUE TO MOVE
EAST ENDING THE RAIN IN THE GULF. THE BROAD RIDGE ACROSS THE BERING
WILL AMPLIFY OVER WESTERN ALASKA TODAY WHILE THE LOW BEHIND IT
CONTINUES TO DIG FURTHER SOUTHWEST TOWARD THE WESTERN ALEUTIANS. THIS
SYSTEM WILL STRENGTHEN ON ITS EASTWARD TRACK TOWARD THE EASTERN
BERING BRINGING STRONGER WINDS AND RAIN.

.SHORT TERM FORECAST...
SOUTHCENTRAL ALASKA...
NORTHWEST FLOW AT THE SURFACE KEEPS THINGS DRY ACROSS SOUTHCENTRAL
TODAY WITH GUSTY WINDS THROUGH CHANNELED TERRAIN. SKIES WILL BE CLEAR
TO PARTLY CLOUDY ALLOWING TEMPERATURES TO WARM INTO THE MID AND UPPER
50S THIS AFTERNOON. OVERNIGHT...WINDS WILL BE LIGHTER WITH A RIDGE
PARKED ACROSS THE AREA. COLD TEMPERATURES ARE EXPECTED AGAIN ACROSS
MUCH OF THE ANCHORAGE BOWL TONIGHT AS RADIATIONAL COOLING OCCURS
UNDER CLEAR SKIES.

THE NEXT FRONT WILL BEGIN TO MOVE ACROSS THE EASTERN GULF MONDAY
NIGHT BRINGING RAIN AND GUSTY WINDS. THE FRONT WILL MOVE INTO SOUTH
CENTRAL BY TUESDAY WITH WIDESPREAD RAIN ACROSS THE AREA.

SOUTHWEST ALASKA...
A RIDGE WILL KEEP THE REGION DRY THROUGH SUNDAY NIGHT. A FRONT WILL
MOVE INTO THE THE COASTAL AREAS MONDAY MORNING AND SPREAD EASTWARD.
WIDESPREAD SHOWERS WILL TAPER OFF BY WEDNESDAY...HOWEVER PERIODS OF
RAIN WILL AFFECT THE REGION THROUGH THE END OF THE WORK WEEK AS A
WEAK BOUNDARY REMAINS ALONG THE ALASKA AND ALEUTIAN RANGE.

ALEUTIANS/BERING SEA...
A SERIES OF FRONTS WILL MOVE ACROSS THE BERING THIS WEEK BRINGING
RAIN AND GUSTY WINDS.

.LONG TERM FORECAST...
AFTER THE FRONT MOVES EAST OF SOUTH CENTRAL ALASKA THE LONG RANGE
MODELS FORECAST A LESS AMPLIFIED WEATHER PATTERN. MODELS ARE NOT IN
AGREEMENT ON THE TIMING AND STRENGTH OF THE NEXT FRONT ON THURSDAY
ACROSS THE BERING...HOWEVER THIS SYSTEM SHOULD REACH BRISTOL BAY BY
THE END OF THE WEEK.

.AER/ALU...WATCH/WARNING SUMMARY
PUBLIC...FREEZE WARNING 101 111
MARINE...GALES 130 175 176

KH SEP 12