Wind Advisory 1, NWS Phoenix, AZ

348 
WWUS75 KPSR 101037
NPWPSR

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE PHOENIX AZ
337 AM MST THU JAN 10 2013

CAZ032-033-110200-
/O.CON.KPSR.WI.Y.0001.130110T1800Z-130111T0300Z/
/O.CON.KPSR.FZ.A.0001.130112T0800Z-130115T1600Z/
RIVERSIDE COUNTY/EASTERN DESERTS-IMPERIAL COUNTY-
INCLUDING THE CITIES OF...CHIRIACO SUMMIT...DESERT CENTER...
BRAWLEY...CALEXICO...EL CENTRO
237 AM PST THU JAN 10 2013

...WIND ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO
7 PM PST THIS EVENING...
...FREEZE WATCH REMAINS IN EFFECT FROM LATE FRIDAY NIGHT THROUGH
TUESDAY MORNING...

A WIND ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 7 PM
PST THIS EVENING. A FREEZE WATCH REMAINS IN EFFECT FROM LATE
FRIDAY NIGHT THROUGH TUESDAY MORNING. 

* AFFECTED WIND AREA...SOUTHEAST CALIFORNIA DESERTS...INCLUDING 
  THE IMPERIAL VALLEY...SALTON SEA...AND INTERSTATE 10 BETWEEN 
  INDIO AND BLYTHE. 

* TIMING...INCREASING WIND THIS AFTERNOON...PEAKING TOWARD SUNSET.

* WINDS...30 TO 40 MPH WITH ISOLATED GUSTS UP TO 50 MPH.

* IMPACTS...STRONG CROSSWINDS WITH LOW VISIBILITIES IN BLOWING 
  DUST AND SAND COULD CAUSE HAZARDOUS DRIVING CONDITIONS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND ADVISORY MEANS THAT SUSTAINED WIND SPEEDS OF BETWEEN
30 AND 40 MPH ARE EXPECTED...OR WIND GUSTS OF BETWEEN 40 AND
58 MPH. WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY
FOR HIGH PROFILE VEHICLES. IN ADDITION...STRONG WINDS OVER DESERT
AREAS COULD RESULT IN BRIEFLY LOWERED VISIBILITIES TO WELL UNDER
A MILE AT TIMES IN BLOWING DUST OR BLOWING SAND. USE EXTRA
CAUTION.

ALSO...A FREEZE WATCH FOR POSSIBLE WIDESPREAD SUB-FREEZING
MORNING TEMPERATURES ON THE DESERTS HAS BEEN POSTED FROM SATURDAY
MORNING THROUGH TUESDAY MORNING. THESE CONDITIONS COULD DESTROY
OR DAMAGE CROPS AND OTHER SENSITIVE VEGETATION.

&&

$$

AZZ020-021-025-026-CAZ031-110200-
/O.CON.KPSR.WI.Y.0001.130110T2100Z-130111T0300Z/
/O.CON.KPSR.FZ.A.0001.130112T0800Z-130115T1600Z/
LOWER COLORADO RIVER VALLEY AZ-WEST CENTRAL DESERTS-
YUMA/MARTINEZ LAKE AND VICINITY-SOUTHWEST DESERTS-
LOWER COLORADO RIVER VALLEY CA-
INCLUDING THE CITIES OF...EHRENBERG...PARKER...QUARTZSITE...
SALOME...FORTUNA FOOTHILLS...YUMA...TACNA...WELLTON...BLYTHE
337 AM MST THU JAN 10 2013 /237 AM PST THU JAN 10 2013/

...WIND ADVISORY REMAINS IN EFFECT FROM 2 PM MST /1 PM PST/ THIS
AFTERNOON TO 8 PM MST /7 PM PST/ THIS EVENING...
...FREEZE WATCH REMAINS IN EFFECT FROM LATE FRIDAY NIGHT THROUGH
TUESDAY MORNING...

A WIND ADVISORY REMAINS IN EFFECT FROM 2 PM MST /1 PM PST/ THIS
AFTERNOON TO 8 PM MST /7 PM PST/ THIS EVENING. A FREEZE WATCH
REMAINS IN EFFECT FROM LATE FRIDAY NIGHT THROUGH TUESDAY MORNING.

* AFFECTED WIND AREA...A LARGE PART OF SOUTHWEST ARIZONA 
  INCLUDING THE COLORADO RIVER VALLEY...AND PORTIONS OF 
  INTERSTATES 8 AND 1O. 

* TIMING...INCREASING WIND THIS AFTERNOON...PEAKING TOWARD SUNSET.

* WINDS...30 TO 40 MPH WITH ISOLATED GUSTS TO 50 MPH.

* IMPACTS...STRONG CROSSWINDS WITH LOW VISIBILITIES IN BLOWING 
  DUST AND SAND COULD CAUSE HAZARDOUS DRIVING CONDITIONS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND ADVISORY MEANS THAT SUSTAINED WIND SPEEDS OF BETWEEN
30 AND 40 MPH ARE EXPECTED...OR WIND GUSTS OF BETWEEN 40 AND
58 MPH. WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY
FOR HIGH PROFILE VEHICLES. IN ADDITION...STRONG WINDS OVER DESERT
AREAS COULD RESULT IN BRIEFLY LOWERED VISIBILITIES TO WELL UNDER
A MILE AT TIMES IN BLOWING DUST OR BLOWING SAND. USE EXTRA
CAUTION.

ALSO...A FREEZE WATCH FOR POSSIBLE WIDESPREAD SUB-FREEZING
MORNING TEMPERATURES ON THE DESERTS HAS BEEN POSTED FROM SATURDAY
MORNING THROUGH TUESDAY MORNING. THESE CONDITIONS COULD DESTROY
OR DAMAGE CROPS AND OTHER SENSITIVE VEGETATION.

&&

$$

CAZ030-110200-
/O.CON.KPSR.WI.Y.0001.130110T1800Z-130111T0300Z/
JOSHUA TREE NATIONAL PARK-
INCLUDING THE CITY OF...COTTONWOOD VISITOR CENTER
237 AM PST THU JAN 10 2013

...WIND ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO
7 PM PST THIS EVENING...

A WIND ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 7 PM
PST THIS EVENING. 

* AFFECTED WIND AREA...JOSHUA TREE NATIONAL MONUMENT.

* TIMING...INCREASING WIND THIS AFTERNOON...PEAKING TOWARD SUNSET.

* WINDS...35 TO 40 MPH WITH ISOLATED GUSTS TO 50 MPH.

* IMPACTS...STRONG CROSSWINDS WITH LOW VISIBILITIES IN BLOWING 
  DUST AND SAND COULD CAUSE HAZARDOUS DRIVING CONDITIONS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND ADVISORY MEANS THAT SUSTAINED WIND SPEEDS OF BETWEEN
30 AND 40 MPH ARE EXPECTED...OR WIND GUSTS OF BETWEEN 40 AND
58 MPH. WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY
FOR HIGH PROFILE VEHICLES. IN ADDITION...STRONG WINDS OVER DESERT
AREAS COULD RESULT IN BRIEFLY LOWERED VISIBILITIES TO WELL UNDER
A MILE AT TIMES IN BLOWING DUST OR BLOWING SAND. USE EXTRA
CAUTION.

&&

$$

AZZ022-023-027-028-110200-
/O.CON.KPSR.FZ.A.0001.130112T0800Z-130115T1600Z/
NORTHWEST MARICOPA COUNTY-GREATER PHOENIX AREA-
SOUTHWEST MARICOPA COUNTY-
NORTHWEST AND NORTH CENTRAL PINAL COUNTY-
INCLUDING THE CITIES OF...BUCKEYE...NEW RIVER...WICKENBURG...
MESA...PHOENIX...GILA BEND...APACHE JUNCTION...CASA GRANDE...
FLORENCE
337 AM MST THU JAN 10 2013

...FREEZE WATCH REMAINS IN EFFECT FROM LATE FRIDAY NIGHT THROUGH
TUESDAY MORNING...

A FREEZE WATCH REMAINS IN EFFECT FROM LATE FRIDAY NIGHT THROUGH
TUESDAY MORNING. 

* AFFECTED AREA...ALL OF THE SOUTH CENTRAL ARIZONA DESERTS... 
  INCLUDING THE GREATER PHOENIX AREA...WICKENBURG...GILA BEND... 
  BUCKEYE...AND CASA GRANDE AND COOLIDGE. 

* TEMPERATURE...MULTIPLE DAYS OF SUBFREEZING TEMPERATURES ARE 
  POSSIBLE ON THE LOWER DESERTS. 

* IMPACTS...EXTENDED FREEZING TEMPERATURES COULD CAUSE DAMAGE TO 
  IRRIGATION PIPES...WATER LINES GOING INTO HOMES...AND PLANTS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WATCH MEANS SUB-FREEZING TEMPERATURES ARE POSSIBLE.
THESE CONDITIONS COULD DESTROY OR DAMAGE CROPS AND OTHER
SENSITIVE VEGETATION.

&&

$$

VISIT US ON FACEBOOK...TWITTER...AND AT WEATHER.GOV/PHOENIX

387 
WWUS75 KPSR 102025
NPWPSR

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE PHOENIX AZ
125 PM MST THU JAN 10 2013

CAZ032-033-110315-
/O.CON.KPSR.WI.Y.0001.000000T0000Z-130111T0300Z/
/O.CON.KPSR.FZ.A.0001.130112T0800Z-130115T1600Z/
RIVERSIDE COUNTY/EASTERN DESERTS-IMPERIAL COUNTY-
INCLUDING THE CITIES OF...CHIRIACO SUMMIT...DESERT CENTER...
BRAWLEY...CALEXICO...EL CENTRO
1225 PM PST THU JAN 10 2013

...WIND ADVISORY REMAINS IN EFFECT UNTIL 7 PM PST THIS EVENING...
...FREEZE WATCH REMAINS IN EFFECT FROM LATE FRIDAY NIGHT THROUGH
TUESDAY MORNING...

A WIND ADVISORY REMAINS IN EFFECT UNTIL 7 PM PST THIS EVENING. A
FREEZE WATCH REMAINS IN EFFECT FROM LATE FRIDAY NIGHT THROUGH
TUESDAY MORNING. 

* AFFECTED WIND AREA...SOUTHEAST CALIFORNIA DESERTS...INCLUDING THE
  IMPERIAL VALLEY...SALTON SEA...INTERSTATE 10 BETWEEN INDIO AND
  BLYTHE...AND INTERSTATE 8 THROUGH EL CENTRO.

* TIMING...STRONG WINDS WILL CONTINUE THROUGH THIS EVENING.

* WINDS...25 TO 35 MPH WITH ISOLATED GUSTS UP TO 50 MPH.

* IMPACTS...STRONG CROSSWINDS WITH LOW VISIBILITIES DUE TO BLOWING
  DUST AND SAND COULD CAUSE HAZARDOUS DRIVING CONDITIONS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND ADVISORY MEANS THAT SUSTAINED WIND SPEEDS OF BETWEEN
30 AND 40 MPH ARE EXPECTED...OR WIND GUSTS OF BETWEEN 40 AND
58 MPH. WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY
FOR HIGH PROFILE VEHICLES. IN ADDITION...STRONG WINDS OVER DESERT
AREAS COULD RESULT IN BRIEFLY LOWERED VISIBILITIES TO WELL UNDER
A MILE AT TIMES IN BLOWING DUST OR BLOWING SAND. USE EXTRA
CAUTION.

ALSO...A FREEZE WATCH FOR POSSIBLE WIDESPREAD SUB-FREEZING
MORNING TEMPERATURES ON THE DESERTS HAS BEEN POSTED FROM SATURDAY
MORNING THROUGH TUESDAY MORNING. THESE CONDITIONS COULD DESTROY
OR DAMAGE CROPS AND OTHER SENSITIVE VEGETATION.

&&

$$

AZZ020-021-025-026-CAZ031-110315-
/O.CON.KPSR.WI.Y.0001.130110T2100Z-130111T0300Z/
/O.CON.KPSR.FZ.A.0001.130112T0800Z-130115T1600Z/
LOWER COLORADO RIVER VALLEY AZ-WEST CENTRAL DESERTS-
YUMA/MARTINEZ LAKE AND VICINITY-SOUTHWEST DESERTS-
LOWER COLORADO RIVER VALLEY CA-
INCLUDING THE CITIES OF...EHRENBERG...PARKER...QUARTZSITE...
SALOME...FORTUNA FOOTHILLS...YUMA...TACNA...WELLTON...BLYTHE
125 PM MST THU JAN 10 2013 /1225 PM PST THU JAN 10 2013/

...WIND ADVISORY REMAINS IN EFFECT UNTIL 8 PM MST /7 PM PST/ THIS
EVENING...
...FREEZE WATCH REMAINS IN EFFECT FROM LATE FRIDAY NIGHT THROUGH
TUESDAY MORNING...

A WIND ADVISORY REMAINS IN EFFECT UNTIL 8 PM MST /7 PM PST/ THIS
EVENING. A FREEZE WATCH REMAINS IN EFFECT FROM LATE FRIDAY NIGHT
THROUGH TUESDAY MORNING. 

* AFFECTED WIND AREA...A LARGE PART OF SOUTHWEST ARIZONA INCLUDING
  THE COLORADO RIVER VALLEY...AND PORTIONS OF INTERSTATES 8 AND 10
  ALONG THE STATE BORDER. 

* TIMING...INCREASING WIND SPEEDS THIS AFTERNOON...PEAKING TOWARD 
  SUNSET.

* WINDS...25 TO 35 MPH WITH ISOLATED GUSTS TO 45 MPH.

* IMPACTS...STRONG CROSSWINDS WITH LOW VISIBILITIES DUE TO BLOWING
  DUST AND SAND COULD CAUSE HAZARDOUS DRIVING CONDITIONS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND ADVISORY MEANS THAT SUSTAINED WIND SPEEDS OF BETWEEN
30 AND 40 MPH ARE EXPECTED...OR WIND GUSTS OF BETWEEN 40 AND
58 MPH. WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY
FOR HIGH PROFILE VEHICLES. IN ADDITION...STRONG WINDS OVER DESERT
AREAS COULD RESULT IN BRIEFLY LOWERED VISIBILITIES TO WELL UNDER
A MILE AT TIMES IN BLOWING DUST OR BLOWING SAND. USE EXTRA
CAUTION.

ALSO...A FREEZE WATCH FOR POSSIBLE WIDESPREAD SUB-FREEZING
MORNING TEMPERATURES ON THE DESERTS HAS BEEN POSTED FROM SATURDAY
MORNING THROUGH TUESDAY MORNING. THESE CONDITIONS COULD DESTROY
OR DAMAGE CROPS AND OTHER SENSITIVE VEGETATION.

&&

$$

CAZ030-110300-
/O.CON.KPSR.WI.Y.0001.000000T0000Z-130111T0300Z/
JOSHUA TREE NATIONAL PARK-
INCLUDING THE CITY OF...COTTONWOOD VISITOR CENTER
1225 PM PST THU JAN 10 2013

...WIND ADVISORY REMAINS IN EFFECT UNTIL 7 PM PST THIS EVENING...

A WIND ADVISORY REMAINS IN EFFECT UNTIL 7 PM PST THIS EVENING. 

* AFFECTED WIND AREA...JOSHUA TREE NATIONAL MONUMENT.

* TIMING...STRONG WINDS WILL CONTINUE THROUGH EARLY THIS EVENING.

* WINDS...25 TO 35 MPH WITH ISOLATED GUSTS TO 45 MPH.

* IMPACTS...STRONG CROSSWINDS WITH LOW VISIBILITIES DUE TO BLOWING
  DUST AND SAND COULD CAUSE HAZARDOUS DRIVING CONDITIONS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND ADVISORY MEANS THAT SUSTAINED WIND SPEEDS OF BETWEEN
30 AND 40 MPH ARE EXPECTED...OR WIND GUSTS OF BETWEEN 40 AND
58 MPH. WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY
FOR HIGH PROFILE VEHICLES. IN ADDITION...STRONG WINDS OVER DESERT
AREAS COULD RESULT IN BRIEFLY LOWERED VISIBILITIES TO WELL UNDER
A MILE AT TIMES IN BLOWING DUST OR BLOWING SAND. USE EXTRA
CAUTION.

&&

$$

AZZ022-023-027-028-110315-
/O.CON.KPSR.FZ.A.0001.130112T0800Z-130115T1600Z/
NORTHWEST MARICOPA COUNTY-GREATER PHOENIX AREA-
SOUTHWEST MARICOPA COUNTY-
NORTHWEST AND NORTH CENTRAL PINAL COUNTY-
INCLUDING THE CITIES OF...BUCKEYE...NEW RIVER...WICKENBURG...
MESA...PHOENIX...GILA BEND...APACHE JUNCTION...CASA GRANDE...
FLORENCE
125 PM MST THU JAN 10 2013

...FREEZE WATCH REMAINS IN EFFECT FROM LATE FRIDAY NIGHT THROUGH
TUESDAY MORNING...

A FREEZE WATCH REMAINS IN EFFECT FROM LATE FRIDAY NIGHT THROUGH
TUESDAY MORNING. 

* AFFECTED AREA...ALL OF THE SOUTH CENTRAL ARIZONA DESERTS...
  INCLUDING THE GREATER PHOENIX AREA...WICKENBURG...GILA BEND...
  BUCKEYE...CASA GRANDE AND COOLIDGE.

* TEMPERATURE...MULTIPLE DAYS OF SUBFREEZING MORNING TEMPERATURES ARE
  POSSIBLE ACROSS SOUTH CENTRAL ARIZONA.

* IMPACTS...EXTENDED FREEZING TEMPERATURES COULD CAUSE DAMAGE TO
  PLANTS...IRRIGATION PIPES...AND WATER LINES GOING INTO HOMES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WATCH MEANS SUB-FREEZING TEMPERATURES ARE POSSIBLE.
THESE CONDITIONS COULD DESTROY OR DAMAGE CROPS AND OTHER
SENSITIVE VEGETATION.

&&

$$

VISIT US ON FACEBOOK...TWITTER...AND AT WEATHER.GOV/PHOENIX

531 
WWUS75 KPSR 110317
NPWPSR

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE PHOENIX AZ
817 PM MST THU JAN 10 2013

AZZ020-021-025-026-CAZ031>033-110430-
/O.EXP.KPSR.WI.Y.0001.000000T0000Z-130111T0300Z/
/O.CON.KPSR.FZ.A.0001.130112T0800Z-130115T1600Z/
LOWER COLORADO RIVER VALLEY AZ-WEST CENTRAL DESERTS-
YUMA/MARTINEZ LAKE AND VICINITY-SOUTHWEST DESERTS-
LOWER COLORADO RIVER VALLEY CA-RIVERSIDE COUNTY/EASTERN DESERTS-
IMPERIAL COUNTY-
INCLUDING THE CITIES OF...EHRENBERG...PARKER...QUARTZSITE...
SALOME...FORTUNA FOOTHILLS...YUMA...TACNA...WELLTON...BLYTHE...
CHIRIACO SUMMIT...DESERT CENTER...BRAWLEY...CALEXICO... EL CENTRO

817 PM MST THU JAN 10 2013 /717 PM PST THU JAN 10 2013/

...FREEZE WATCH REMAINS IN EFFECT FROM LATE FRIDAY NIGHT THROUGH
TUESDAY MORNING...

...WIND ADVISORY HAS EXPIRED...

THE WIND ADVISORY IS NO LONGER IN EFFECT. ALTHOUGH LOCALLY GUSTY
WINDS ARE STILL OCCURRING ACROSS THE AREA...SUSTAINED WIND SPEEDS
ARE NOW EXPECTED TO REMAIN BELOW 30 MPH...WITH GUSTS REMAINING BELOW
40 MPH. 

A FREEZE WATCH REMAINS IN EFFECT FROM LATE FRIDAY NIGHT THROUGH
TUESDAY MORNING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WATCH FOR POSSIBLE WIDESPREAD SUB-FREEZING MORNING TEMPERATURES
ON THE DESERTS HAS BEEN POSTED FROM SATURDAY MORNING THROUGH TUESDAY
MORNING. THESE CONDITIONS COULD DESTROY OR DAMAGE CROPS AND OTHER
SENSITIVE VEGETATION.

&&

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WATCH MEANS SUB-FREEZING TEMPERATURES ARE POSSIBLE.
THESE CONDITIONS COULD DESTROY OR DAMAGE CROPS AND OTHER
SENSITIVE VEGETATION.

&&

$$

CAZ030-110430-
/O.EXP.KPSR.WI.Y.0001.000000T0000Z-130111T0300Z/
JOSHUA TREE NATIONAL PARK-
INCLUDING THE CITY OF...COTTONWOOD VISITOR CENTER
717 PM PST THU JAN 10 2013

...WIND ADVISORY HAS EXPIRED...

THE WIND ADVISORY IS NO LONGER IN EFFECT. WINDS HAVE NOW DIMINISHED
ACROSS THE PARK AREA.

$$

AZZ022-023-027-028-110430-
/O.CON.KPSR.FZ.A.0001.130112T0800Z-130115T1600Z/
NORTHWEST MARICOPA COUNTY-GREATER PHOENIX AREA-
SOUTHWEST MARICOPA COUNTY-
NORTHWEST AND NORTH CENTRAL PINAL COUNTY-
INCLUDING THE CITIES OF...BUCKEYE...NEW RIVER...WICKENBURG...
MESA...PHOENIX...GILA BEND...APACHE JUNCTION...CASA GRANDE...
FLORENCE
817 PM MST THU JAN 10 2013

...FREEZE WATCH REMAINS IN EFFECT FROM LATE FRIDAY NIGHT THROUGH
TUESDAY MORNING...

A FREEZE WATCH REMAINS IN EFFECT FROM LATE FRIDAY NIGHT THROUGH
TUESDAY MORNING. 

* AFFECTED AREA...ALL OF THE SOUTH CENTRAL ARIZONA DESERTS... 
  INCLUDING THE GREATER PHOENIX AREA...WICKENBURG...GILA BEND... 
  BUCKEYE...CASA GRANDE AND COOLIDGE. 

* TEMPERATURE...MULTIPLE DAYS OF SUBFREEZING MORNING 
  TEMPERATURES ARE POSSIBLE ACROSS SOUTH CENTRAL ARIZONA. 

* IMPACTS...EXTENDED FREEZING TEMPERATURES COULD CAUSE DAMAGE TO 
  PLANTS...IRRIGATION PIPES...AND WATER LINES GOING INTO HOMES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WATCH MEANS SUB-FREEZING TEMPERATURES ARE POSSIBLE.
THESE CONDITIONS COULD DESTROY OR DAMAGE CROPS AND OTHER
SENSITIVE VEGETATION.

&&

$$

VISIT US ON FACEBOOK...TWITTER...AND AT WEATHER.GOV/PHOENIX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PHOENIX AZ
825 AM MST WED JAN 9 2013

.SYNOPSIS...
A HIGH PRESSURE SYSTEM OVER THE REGION WILL PROVIDE MOSTLY CLEAR
SKIES AND WARMER TEMPERATURES TODAY. HOWEVER INCREASING HIGH
CLOUDS ARE EXPECTED WEDNESDAY NIGHT...AHEAD OF A STRONG COLD FRONT
ON THURSDAY. GUSTY SOUTHWEST WINDS WILL DEVELOP OVER PORTIONS OF
SOUTHEAST CALIFORNIA AND SOUTHWEST ARIZONA LATE THURSDAY
AFTERNOON...WITH A THREAT OF SHOWERS DEVELOPING IN SOUTH CENTRAL
ARIZONA THURSDAY EVENING. A VERY COLD AIRMASS WILL SETTLE OVER THE
AREA FRIDAY THROUGH TUESDAY...WITH A POSSIBLE HARD FREEZE ON THE
LOWER DESERTS IN THE MORNINGS.

&&

.DISCUSSION...
WARMER AFTERNOON TEMPERATURES ARE STILL EXPECTED TODAY UNDER A HIGH
PRESSURE SYSTEM...HOWEVER THIS SYSTEM WILL WEAKEN LATER TODAY AS A
STRONG COLD FRONT APPROACHES FOR THURSDAY. ALTHOUGH SKIES WILL BE
MOSTLY SUNNY THROUGHOUT THE DAY...INCREASING HIGH CLOUDS LATER IN
THE AFTERNOON WILL SIGNAL THE APPROACHING COLD FRONT.

THE COLD FRONTAL PASSAGE...WITH VERY WINDY CONDITIONS IS STILL
EXPECTED THROUGH SOUTHEAST CA AND THE COLORADO RIVER VALLEY BETWEEN
1-3 PM THURSDAY...AND FINALLY ACROSS THE GREATER PHOENIX AREA
BETWEEN 6-7 PM. THE THREAT FOR SHOWERS ALONG THE FRONTAL ZONE WILL
BE CONFINED TO MAINLY SOUTH CENTRAL AZ.

CURRENT FORECASTS LOOK VERY GOOD. NO UPDATES PLANNED. DETAILS ON THE
UPCOMING WEATHER CHANGE INCLUDING THE COLD SNAP THIS WEEKEND ARE
EXPLAINED IN THE PREVIOUS DISCUSSION BELOW.

PREVIOUS DISCUSSION...
...POTENTIAL FOR A HARD FREEZE FOR THE SOUTHEAST CA...AND SOUTHWEST
AND SOUTH CENTRAL AZ DESERTS SATURDAY THROUGH TUESDAY MORNINGS.

THE HIGH PRESSURE SYSTEM CURRENTLY CENTERED OVER THE GREAT BASIN AND
CENTRAL ROCKIES WILL QUICKLY SLIDE EASTWARD AHEAD OF THE MUCH
ANTICIPATED STRONG UPPER TROUGH AND THE ASSOCIATED VERY COLD
AIRMASS. LOW LEVEL FLOW WILL TURN SOUTHERLY LATER TODAY WITH DECENT
WARM AIR ADVECTION AFFECTING THE REGION. AFTER SEEING PORTIONS OF
SOUTHEAST CALIFORNIA REACHING THE MIDDLE TO UPPER 70S YESTERDAY...
EXPECTING SOME OF THAT WARM AIR TO SLIDE EASTWARD TODAY. WITH 850MB
TEMPERATURES AROUND 13C...SHOULD EXPECT MANY LOCATIONS TO REACH THE
70 MARK WITH MIDDLE 70S AGAIN LIKELY IN WESTERN ZONES.

ATTENTION THEN TURNS TOWARD THE UPCOMING COLD WAVE THAT COULD BE THE
REGION/S WORST IN THE LAST FEW DECADES. STRONG UPPER TROUGH NOW
SITUATED OFF THE PACIFIC NORTHWEST WILL DIVE SOUTHEASTWARD OVER THE
NEXT COUPLE DAYS WITH AN OPEN TAP TO COLD AIR SITUATED ACROSS THE
NORTHERN PACIFIC AND WESTERN CANADA. BY EARLY THURSDAY MORNING...THE
LEADING SHORTWAVE TROUGH WILL BE QUICKLY MOVING THROUGH CENTRAL
CALIFORNIA WITH INCREASING SOUTHWESTERLY FLOW AHEAD OF THE TROUGH.
BY LATE THURSDAY AFTERNOON...MODELS SHOW IMPRESSIVE 12HR 500MB
HEIGHT CHANGES OF AROUND 17DM OVER SOUTHEAST CALIFORNIA INTO
NORTHWEST ARIZONA. THIS WILL HELP GIVE RISE TO STRONG WESTERLY WINDS
DEVELOPING ACROSS SOUTHEAST CALIFORNIA AND THE LOWER COLORADO RIVER
VALLEY DURING THE AFTERNOON. THROUGH THURSDAY EVENING...STRONG WINDS
WITH POTENTIAL GUSTS UP TO 45-50MPH WILL BE POSSIBLE. A WIND
ADVISORY WILL LIKELY BE NEEDED FOR MUCH OF SOUTHEAST CALIFORNIA AND
PORTIONS OF SOUTHWEST ARIZONA. BLOWING DUST COULD ALSO BECOME A
FACTOR BY LATE THURSDAY AFTERNOON WITH THE POSSIBILITY OF LOCALLY
SIGNIFICANT VISIBILITY RESTRICTIONS.

FURTHER EAST...WINDS WILL BE LOCALLY WINDY...BUT MAINLY AFFECTING
HIGHER ELEVATIONS ACROSS SOUTH-CENTRAL ARIZONA. LOW LEVEL MOISTURE
ADVECTION IS ALSO ANTICIPATED AHEAD OF THE ADVANCING COLD FRONT ON
THURSDAY WITH PRECIPITABLE WATER VALUES LIKELY APPROACHING A HALF AN
INCH. THERE WILL BE A BRIEF WINDOW FOR SHOWER DEVELOPMENT...MAINLY
ASSOCIATED WITH THE STRONG FORCING AHEAD OF THE COLD FRONT AS IT
SWEEPS THROUGH. SCATTERED SHOWERS WILL MAINLY AFFECT AREAS NORTH AND
EAST OF PHOENIX...ESPECIALLY IN HIGHER ELEVATIONS ACROSS SOUTHERN
GILA COUNTY. SNOW LEVELS WILL BE CRASHING BEHIND THE FRONT...LIKELY
DROPPING FROM AROUND 6K FEET AROUND 9PM THURSDAY TO 3K FEET BY 3AM.
MUCH OF THE PRECIPITATION WILL BE ENDING SHORTLY AFTER MIDNIGHT
ACROSS SOUTHERN GILA COUNTY...SO THAT DOESN/T LEAVE MUCH TIME FOR
ACCUMULATING SNOWFALL. CURRENT THINKING IS MOST OF THE SNOWFALL WILL
BE CONFINED TO ELEVATIONS ABOVE 4500FT THURSDAY NIGHT WITH A COUPLE
INCHES POSSIBLE. MAINLY LINGERING SNOW FLURRIES WILL BE POSSIBLE
EARLY FRIDAY MORNING.

THE VERY COLD AIR WILL SWEEP IN BEHIND THE SYSTEM WITH 850MB
TEMPERATURES FALLING TO AROUND -3C. DAYTIME HIGHS WILL BE VERY
CHILLY FRIDAY THROUGH THE WEEKEND WITH HIGHS STRUGGLING TO BREAK 50.
OVERNIGHT LOWS FRIDAY AND SATURDAY NIGHT WILL LIKELY BE SUB-FREEZING
IN MANY LOWER DESERT SPOTS AND POSSIBLY BOTTOMING OUT AROUND 20 IN
THE COLDEST SPOTS. THE COLDEST AIR MAY ACTUALLY NOT MAKE IT HERE
UNTIL LATE SUNDAY INTO MONDAY AS MODELS ARE SHOWING A SECONDARY
STRONG SHORTWAVE TROUGH CRASHING SOUTHWARD FROM WESTERN CANADA
REACHING THE DESERT SOUTHWEST MONDAY MORNING. THERE IS STILL SOME
QUESTION ON HOW COLD THIS SECONDARY WAVE WILL BE...BUT INDICATIONS
ARE IT COULD RESULT IN OVERNIGHT LOWS A COUPLE DEGREES COLDER THAN
THE PREVIOUS NIGHTS. THERE IS A VERY GOOD POSSIBILITY OF HAVING
SUB-FREEZING TEMPERATURES FOR FOUR CONSECUTIVE NIGHTS...AND POSSIBLY
EVEN FIVE DEPENDING ON HOW THINGS PLAY OUT NEXT TUESDAY AND
WEDNESDAY. THIS COLD SNAP WILL BE NEARLY UNPRECEDENTED IN THE
PAST 30 YEARS. THE LAST TIME THE PHOENIX AREA SAW FOUR CONSECUTIVE
DAYS OF 32 OR LOWER WAS IN LATE DECEMBER 1988. THE COLD SNAP AROUND
NEW YEAR/S 2011 NETTED THREE CONSECUTIVE DAYS OF 32 OR LOWER FOR
PHOENIX.

&&

.AVIATION...
SOUTH CENTRAL ARIZONA INCLUDING KPHX...KIWA...KSDL...
SOUTHEAST CA AND SOUTHWEST AZ...INCLUDING IPL AND BLH...

INCREASING HIGH CLOUDS FROM THE WEST TODAY INTO TONIGHT WITH BASES
GENLY AOA 20K FEET OTHERWISE DRY CONDITIONS UNDER HIGH PRESSURE
ALOFT. LIGHT VARIABLE OR LIGHT DIURNAL WINDS ALL AIRFIELDS NEXT 24
HOURS. NO AVIATION CONCERNS THROUGH TONIGHT.

APPROACHING LOW PRESSURE SYSTEM AND COLD FRONT WILL LEAD TO STRONG
WINDS DEVELOPING ACROSS SOUTHEAST CA AND ALONG THE LOWER CO RIVER
LATER THU AFTERNOON INTO THE EVENING. MAY SEE PEAK WESTERLY GUSTS IN
EXCESS OF 40 MPH BY LATE AFTERNOON AT KIPL WITH SOME BLOWING DUST.
GUSTY WINDS WILL LIKELY ALSO AFFECT KBLH.

AVIATION DISCUSSION NOT UPDATED FOR AMENDED TAFS.

&&

.FIRE WEATHER...
FRIDAY THROUGH TUESDAY...
A LARGE...DEEP AND VERY COLD AREA OF LOW PRESSURE WILL DEVELOP
ACROSS THE WESTERN STATES FRIDAY AND PERSIST INTO THE EARLY PART OF
NEXT WEEK. A SERIES OF WEATHER DISTURBANCES WILL MOVE THROUGH THE
LOW PRESSURE SYSTEM AND ACROSS SOUTHEAST CALIFORNIA AND ARIZONA
DURING THIS TIME PERIOD BUT THEY ARE EXPECTED TO BE RATHER DRY
SYSTEMS WITH LITTLE CHANCE FOR PRECIPITATION. HIGH TEMPERATURES WILL
REMAIN WELL BELOW SEASONAL NORMALS DURING THE PERIOD WITH DESERT
HIGHS MOSTLY IN THE LOW TO MID 50S EACH DAY. LOW TEMPERATURES WILL
DROP TO NEAR OR BELOW FREEZING OVER MUCH OF THE DESERTS EACH
MORNING. HUMIDITIES WILL REMAIN SOMEWHAT ELEVATED THROUGHOUT THE
PERIOD LARGELY DUE TO THE VERY COLD TEMPERATURES...AND MINIMUM RH
VALUES WILL GENERALLY RANGE FROM THE MID TEENS TO THE LOW 20S...WITH
SOME OF THE DRIES AIR TO BE IN PLACE ACROSS SOUTHEAST CALIFORNIA.
LOCALLY BREEZY CONDITIONS ARE EXPECTED EACH DAY...WITH SOME OF THE
STRONGEST WINDS TO FOCUS OUT WEST...AND DOWN THE LOWER COLORADO
RIVER VALLEY.

&&

.PSR WATCHES/WARNINGS/ADVISORIES...

AZ...NONE.

CA...NONE.

&&

VISIT US ON FACEBOOK...TWITTER...AND AT WEATHER.GOV/PHOENIX

DISCUSSION...VASQUEZ/KUHLMAN
AVIATION...CB
FIRE WEATHER...CB

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PHOENIX AZ
339 AM MST WED JAN 9 2013

AZZ022>024-027-028-101045-
NORTHWEST MARICOPA COUNTY-GREATER PHOENIX AREA-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHWEST MARICOPA COUNTY-NORTHWEST AND NORTH CENTRAL PINAL COUNTY-
339 AM MST WED JAN 9 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST-CENTRAL ARIZONA AND
SOUTH-CENTRAL ARIZONA.

.DAY ONE...TODAY AND TONIGHT.

HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

A STRONG LOW PRESSURE SYSTEM WILL BRING COLD TEMPERATURES TO THE
REGION STARTING THURSDAY NIGHT. THERE IS AN INCREASING LIKELIHOOD
LOWER DESERT LOCATIONS ACROSS SOUTH-CENTRAL ARIZONA WILL SEE SUB-
FREEZING OVERNIGHT TEMPERATURES FRIDAY NIGHT THROUGH MONDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

AZZ020-021-025-026-CAZ030>033-101045-
LOWER COLORADO RIVER VALLEY AZ-WEST CENTRAL DESERTS-
YUMA/MARTINEZ LAKE AND VICINITY-SOUTHWEST DESERTS-
JOSHUA TREE NATIONAL PARK-LOWER COLORADO RIVER VALLEY CA-
RIVERSIDE COUNTY/EASTERN DESERTS-IMPERIAL COUNTY-
339 AM MST WED JAN 9 2013 /239 AM PST WED JAN 9 2013/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EXTREME SOUTHWEST
ARIZONA...EXTREME WEST-CENTRAL ARIZONA...SOUTHWEST ARIZONA...WEST-
CENTRAL ARIZONA...EXTREME SOUTHEAST CALIFORNIA AND SOUTHEAST
CALIFORNIA.

.DAY ONE...TODAY AND TONIGHT.

HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

A STRONG LOW PRESSURE SYSTEM WILL BRING VERY WINDY CONDITIONS TO
PORTIONS OF THE REGION ON THURSDAY AFTERNOON AND EVENING. WIND GUSTS
IN THE 35 TO 45 MPH RANGE WITH POSSIBLE GUSTS TO 50 MPH ARE
EXPECTED. AREAS OF BLOWING DUST AND SAND COULD TEMPORARILY RESTRICT
VISIBILITIES.

THERE IS ALSO AN INCREASING LIKELIHOOD LOWER DESERT LOCATIONS ACROSS
SOUTHEAST CALIFORNIA AND SOUTHWEST ARIZONA COULD SEE SUB-FREEZING
OVERNIGHT TEMPERATURES FRIDAY NIGHT THROUGH MONDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

NATIONAL WEATHER SERVICE PHOENIX IS ON THE INTERNET AT

WEATHER.GOV/PHOENIX