SPECIAL WEATHER STATEMENT
Issue Date: 252 PM MST THU DEC 3 2009
Expiration: 600 AM MST FRI DEC 04 2009
...VERY COLD AND DRY CONDITIONS FRIDAY NIGHT WITH INCREASING CHANCES
OF PRECIPITATION EARLY NEXT WEEK...
AN UPPER LEVEL LOW PRESSURE SYSTEM AND ASSOCIATED DRY COLD FRONT IS
EXPECTED TO MOVE ACROSS THE REGION TONIGHT...BRINGING VERY DRY AND COOLER
CONDITIONS THROUGH THIS WEEKEND. ON FRIDAY NIGHT...THE DRY AND COOL
AIR MASS WILL LEAD TO MINIMUM TEMPERATURES IN THE UPPER 20S TO UPPER
30S ACROSS THE LOWER DESERTS OF ARIZONA AND SOUTHEAST CALIFORNIA.
FORECAST LOW TEMPERATURES FOR SATURDAY MORNING INCLUDE 37 AT
PHOENIX...33 AT IMPERIAL...31 AT BLYTHE AND CASA GRANDE...AND 30 AT
GILA BEND.
AT THIS TIME...FORECAST LOW TEMPERATURES WILL FALL JUST SHORT OF
FREEZE WARNING CRITERIA. HOWEVER...SUB-FREEZING CONDITIONS MAY STILL
OCCUR FOR A BRIEF PERIOD OF TIME...AND RESIDENTS SHOULD BE PREPARED
TO TAKE APPROPRIATE ACTION SHOULD A FREEZE WARNING EVENTUALLY BE
NEEDED.
ANOTHER SIGNIFICANT CHANGE IN THE WEATHER PATTERN WILL OCCUR LATER IN
THE WEEKEND INTO EARLY NEXT WEEK...AS A STRONG LOW PRESSURE SYSTEM
DEVELOPING OVER THE PACIFIC NORTHWEST BEGINS TO SPREAD SUBTROPICAL
MOISTURE INTO THE AREA. THE LOW IS EXPECTED TO MOVE INTO THE
SOUTHWEST UNITED STATES MONDAY AND TUESDAY...PRODUCING SCATTERED
SHOWERS OVER THE LOWER DESERTS...AND NUMEROUS SHOWERS OVER THE HIGHER
TERRAIN EAST OF PHOENIX. AT THIS TIME...THE BEST CHANCES FOR RAIN
APPEAR TO BE MONDAY NIGHT INTO TUESDAY. LOCALLY HEAVY RAINFALL WILL
BE POSSIBLE ACROSS THE HIGHER ELEVATIONS NORTH AND EAST OF PHOENIX.
THE WEATHER PATTERN IS EXPECTED TO REMAIN ACTIVE OVER THE WESTERN
UNITED STATES THROUGH THE LATTER PART OF NEXT WEEK. HIGH
TEMPERATURES SHOULD REMAIN BELOW SEASONAL NORMALS DURING THAT TIME
PERIOD.
STAY UP-TO-DATE ON THE LATEST FORECASTS BY LISTENING TO WEATHER RADIO
ON THE PUBLIC SERVICE BAND. MORE DETAILED INFORMATION IS AVAILABLE
FROM THE NATIONAL WEATHER SERVICE IN PHOENIX ON THE INTERNET AT
WEATHER.GOV/PHOENIX
JR
HAZARDOUS WEATHER OUTLOOK
Issue Date: 549 AM MST THU DEC 3 2009
Expiration: 600 AM MST FRI DEC 04 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EXTREME SOUTHWEST
ARIZONA...EXTREME WEST-CENTRAL ARIZONA...SOUTH-CENTRAL ARIZONA...
SOUTHWEST ARIZONA...WEST-CENTRAL ARIZONA AND EXTREME SOUTHEAST
CALIFORNIA.
.DAY ONE...TODAY AND TONIGHT
NO WEATHER HAZARDS ARE EXPECTED.
.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY
THE COMBINATION OF COLDER AND MUCH DRIER AIR...ALONG WITH LIGHT
WIND...WILL CAUSE TEMPERATURES TO FALL TO NEAR OR BELOW FREEZING OVER
MUCH OF THE ARIZONA AND SOUTHEAST CALIFORNIA DESERT FRIDAY NIGHT. AT
THIS TIME LOCAL FREEZE WARNING CRITERIA ARE NOT BEING MET...BUT IT IS
A BORDERLINE SITUATION. IT IS POSSIBLE THAT IF THE AIRMASS ENDS UP
SLIGHTLY COLDER THAN FORECAST...GIVEN THE DRY AIR EXPECTED TO BE IN
PLACE WE MAY YET NEED TO ISSUE A FREEZE WARNING OVER MUCH OF THE
LOWER DESERT FOR FRIDAY NIGHT.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NEEDED.
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