Wind Advisory 15, NWS Phoenix, AZ

000 
WWUS75 KPSR 270305
NPWPSR

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE PHOENIX AZ
805 PM MST TUE DEC 26 2006

CAZ030-032-033-271315-
/O.CON.KPSR.WI.Y.0015.061227T1800Z-061228T0400Z/
JOSHUA TREE NATIONAL PARK-RIVERSIDE COUNTY/EASTERN DESERTS-
IMPERIAL COUNTY-
INCLUDING THE CITIES OF...COTTONWOOD VISITOR CENTER...
LOST HORSE-KEYS VIEW JTNP...CHIRIACO SUMMIT...DESERT CENTER...
EAGLE MTN...MIDLAND...BRAWLEY...CALEXICO...EL CENTRO...GLAMIS...
IMPERIAL...AND THE SALTON SEA
705 PM PST TUE DEC 26 2006

...WIND ADVISORY REMAINS IN EFFECT FROM 10 AM TO 8 PM PST
WEDNESDAY...

A STRONG LOW PRESSURE SYSTEM AND ASSOCIATED COLD FRONT WILL ENTER
SOUTHEAST CALIFORNIA BY WEDNESDAY AFTERNOON DEVELOPING STRONG
WEST TO SOUTHWEST WINDS OF 25 TO 35 MPH WITH GUSTS POSSIBLY TO 50
MPH. WINDS WILL DECREASE SIGNIFICANTLY AFTER 8 PM WEDNESDAY.

WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR
HIGH PROFILE VEHICLES. IN ADDITION...AREAS OF BLOWING DUST OR
SAND ARE LIKELY TO CAUSE LOCAL VISIBILITIES TO DROP WELL UNDER A
MILE AT TIMES. USE EXTRA CAUTION.

$$

AZZ020-021-025-026-CAZ031-271315-
/O.CON.KPSR.WI.Y.0015.061227T2100Z-061228T0400Z/
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...BOUSE...
QUARTZSITE...SALOME...SAN LUIS...SOMERTON...YUMA...
FORTUNA FOOTHILLS...DATELAND...TACNA...WELLTON...BLYTHE
805 PM MST TUE DEC 26 2006 /705 PM PST TUE DEC 26 2006/

...WIND ADVISORY REMAINS IN EFFECT FROM 2 PM MST /1 PM PST/ TO
9 PM MST /8 PM PST/ WEDNESDAY...

A STRONG LOW PRESSURE SYSTEM AND ASSOCIATED COLD FRONT WILL ENTER
SOUTHWEST ARIZONA WEDNESDAY AFTERNOON DEVELOPING STRONG WEST TO 
SOUTHWEST WINDS OF 25 TO 30 MPH AND GUSTS TO 40 MPH. WINDS WILL
DECREASE SIGNIFICANTLY AFTER 9 PM WEDNESDAY.

WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR
HIGH PROFILE VEHICLES. IN ADDITION...AREAS OF BLOWING DUST OR
SAND ARE LIKELY TO CAUSE LOCAL VISIBILITIES TO DROP WELL UNDER A
MILE AT TIMES. USE EXTRA CAUTION.

$$

000 
WWUS75 KPSR 271057
NPWPSR

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE PHOENIX AZ
357 AM MST WED DEC 27 2006

CAZ030-032-033-272300-
/O.EXT.KPSR.WI.Y.0015.061227T1500Z-061228T0800Z/
JOSHUA TREE NATIONAL PARK-RIVERSIDE COUNTY/EASTERN DESERTS-
IMPERIAL COUNTY-
INCLUDING THE CITIES OF...COTTONWOOD VISITOR CENTER...
LOST HORSE-KEYS VIEW JTNP...CHIRIACO SUMMIT...DESERT CENTER...
EAGLE MTN...MIDLAND...BRAWLEY...CALEXICO...EL CENTRO...GLAMIS...
IMPERIAL...AND THE SALTON SEA
257 AM PST WED DEC 27 2006

...WIND ADVISORY NOW IN EFFECT FROM 7 AM THIS MORNING TO MIDNIGHT
PST TONIGHT...

A STRONG LOW PRESSURE SYSTEM AND ASSOCIATED COLD FRONT IS STILL
EXPECTED TO MOVE THROUGH THE AREA TODAY. THE TIME OF ONSET OF THE
STRONG AND GUSTY WINDS HAS BEEN ADJUSTED SLIGHTLY. WESTERLY WINDS OF
20 TO 30 MPH ARE EXPECTED A BIT EARLIER THIS MORNING...AND WILL
INCREASE AFTER THE COLD FRONT PASSES. GUSTS TO 50 MPH CAN ALSO BE
EXPECTED. AREAS OF BLOWING DUST WILL SUDDENLY LOWER THE VISIBILITY TO
LESS THAN ONE MILE...ESPECIALLY ALONG INTERSTATE 8. WINDS THIS STRONG
CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH PROFILE VEHICLES.
SLOW DOWN AND ALLOW EXTRA ROOM BETWEEN VEHICLES.


$$

AZZ020-021-025-026-CAZ031-272300-
/O.EXT.KPSR.WI.Y.0015.061227T2100Z-061228T0800Z/
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...BOUSE...
QUARTZSITE...SALOME...SAN LUIS...SOMERTON...YUMA...
FORTUNA FOOTHILLS...DATELAND...TACNA...WELLTON...BLYTHE
357 AM MST WED DEC 27 2006 /257 AM PST WED DEC 27 2006/

...WIND ADVISORY NOW IN EFFECT FROM 2 PM MST /1 PM PST/ THIS
AFTERNOON TO 1 AM MST /MIDNIGHT PST/ THURSDAY...

STRONG AND GUSTY WINDS ARE EXPECTED BY THIS AFTERNOON THROUGHOUT
THE LOWER COLORADO RIVER VALLEY...AND THE SOUTHWEST DESERTS. WINDS
WILL CONTINUE TO BE STRONG AND GUSTY INTO THE EVENING HOURS BEFORE
SLOWLY DECREASING TONIGHT. WINDS MAY BRIEFLY GUST TO NEAR 45 MPH.
WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH
PROFILE VEHICLES. AREAS OF BLOWING DUST OR SAND ARE LIKELY TO CAUSE
LOCAL VISIBILITIES TO DROP SIGNIFICANTLY...ESPECIALLY ALONG
INTERSTATE 10 AND INTERSTATE 8. SLOW DOWN AND ALLOW EXTRA ROOM
BETWEEN VEHICLES.

$$
SIPPLE

000 
WWUS75 KPSR 272346
NPWPSR

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE PHOENIX AZ
446 PM MST WED DEC 27 2006

AZZ020-021-025-026-CAZ030>033-280600-
/O.CON.KPSR.WI.Y.0015.000000T0000Z-061228T0800Z/
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-
INCLUDING THE CITIES OF...EHRENBERG...PARKER...BOUSE...
QUARTZSITE...SALOME...SAN LUIS...SOMERTON...YUMA...
FORTUNA FOOTHILLS...DATELAND...TACNA...WELLTON...
COTTONWOOD VISITOR CENTER...LOST HORSE-KEYS VIEW JTNP...BLYTHE...
CHIRIACO SUMMIT...DESERT CENTER...EAGLE MTN...MIDLAND...BRAWLEY...
CALEXICO...EL CENTRO...GLAMIS...IMPERIAL...AND THE SALTON SEA
446 PM MST WED DEC 27 2006 /346 PM PST WED DEC 27 2006/

...WIND ADVISORY REMAINS IN EFFECT UNTIL 1 AM MST /MIDNIGHT PST/
THURSDAY...

A WIND ADVISORY FOR SOUTHEAST CALIFORNIA AND SOUTHWEST ARIZONA...
INCLUDING THE COLORADO RIVER VALLEY...WILL CONTINUE UNTIL
1 AM...ALONG WITH AREAS OF BLOWING DUST AND SAND.

A STRONG COLD FRONT MOVED THROUGH SOUTHEAST CALIFORNIA AND SOUTHWEST
ARIZONA WEDNESDAY AFTERNOON. STRONG POST FRONTAL WIND GUSTS TO
BETWEEN 30 AND 45 MPH WILL CONTINUE TO BLOW THROUGHOUT THE EVENING
HOURS. THE STRONGEST WINDS ARE EXPECTED OVER THE IMPERIAL VALLEY OF
CALIFORNIA...THE SALTON SEA...AND IN JOSHUA TREE NATIONAL MONUMENT.

SOME REPORTED WIND GUSTS AT 5 PM MST INCLUDE 45 MPH AT THE IMPERIAL
CALIFORNIA AIRPORT...35 MPH AT BLYTHE...35 MPH AT LOST HORSE IN
JOSHUA TREE NATIONAL PARK...AND 33 MPH NEAR PARKER DAM.



$$

HV

000 
WWUS75 KPSR 280319
NPWPSR

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE PHOENIX AZ
819 PM MST WED DEC 27 2006


AZZ020-021-025-026-CAZ030>033-280430-
/O.CAN.KPSR.WI.Y.0015.000000T0000Z-061228T0800Z/
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-
INCLUDING THE CITIES OF...EHRENBERG...PARKER...BOUSE...
QUARTZSITE...SALOME...SAN LUIS...SOMERTON...YUMA...
FORTUNA FOOTHILLS...DATELAND...TACNA...WELLTON...
COTTONWOOD VISITOR CENTER...LOST HORSE-KEYS VIEW JTNP...BLYTHE...
CHIRIACO SUMMIT...DESERT CENTER...EAGLE MTN...MIDLAND...BRAWLEY...
CALEXICO...EL CENTRO...GLAMIS...IMPERIAL...AND THE SALTON SEA
819 PM MST WED DEC 27 2006 /719 PM PST WED DEC 27 2006/

...WIND ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS CANCELED THE WIND
ADVISORY FOR SOUTHEAST CALIFORNIA AND SOUTHWEST ARIZONA AT 8 PM.

STRONG WINDS THAT DEVELOPED OVER A LARGE PART OF SOUTHEAST CALIFORNIA
AND SOUTHWEST ARIZONA WEDNESDAY AFTERNOON...INCLUDING THE COLORADO
RIVER AND IMPERIAL VALLEY...HAD DIMINISHED CONSIDERABLY AT 8 PM. 
HOWEVER GUSTY WEST TO NORTHWEST WINDS BETWEEN 15 TO 30 MPH WILL
CONTINUED UNTIL MIDNIGHT...THEN DECREASE INTO THE 10 TO 20 MPH RANGE
THE REMAINDER OF THE NIGHT.


$$


HV

AZZ020>028-CAZ030>033-270000-

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PHOENIX AZ
955 AM MST TUE DEC 26 2006

SOUTHWEST AND SOUTH-CENTRAL ARIZONA...AND SOUTHEAST CALIFORNIA
FORECAST DISCUSSION

.SYNOPSIS...
HIGH PRESSURE OVER THE DESERT SOUTHWEST WILL CONTINUE ANOTHER MILD
WINTER WEATHER DAY BEFORE A MAJOR CHANGE TAKES PLACE LATE WEDNESDAY
AND THURSDAY. A STRONG PACIFIC LOW PRESSURE SYSTEM WILL MOVE DOWN
ACROSS THE AREA BY THEN...BRINGING INCREASING WINDS TO SOUTHEAST
CALIFORNIA AND SOUTHWEST ARIZONA. THE SYSTEM WILL ALSO GIVE A CHANCE
OF SHOWERS TO MAINLY SOUTH-CENTRAL ARIZONA WEDNESDAY NIGHT AND
THURSDAY...WITH SNOW IN THE HIGHER ELEVATIONS...ALONG WITH MUCH
COOLER WEATHER ACROSS THE ENTIRE REGION. HIGH PRESSURE WILL RETURN
FRIDAY THROUGH THE WEEKEND...FOR TRANQUIL WEATHER AND WARMING
TEMPERATURES.

&&

.SHORT TERM...
TODAY THROUGH THURSDAY...
RIDGE OF HIGH PRESSURE OVER THE SOUTHWESTERN STATES WILL LEAD TO
ANOTHER ABOVE AVERAGE TEMP DAY ACROSS SOUTHEAST CALIFORNIA...
SOUTHWEST AND SOUTH-CENTRAL ARIZONA. SKIES WILL REMAIN MOSTLY
CLEAR...WITH A FEW HIGH LEVEL CLOUDS MOVING THROUGH FROM TIME TO
TIME. WITH THE LARGE HIGH IN PLACE...WE CAN EXPECT ANOTHER VERY
STABLE DAY TODAY...AND WE HAVE AN AIR STAGNATION ADVISORY IN EFFECT
ONCE AGAIN. SURFACE WINDS WILL REMAIN LIGHT...LESS THAN 5-8 KTS MOST
PLACES. THE RIDGE WILL START TO BREAK DOWN THIS EVENING...AS A
STRONG PAC LOW PRESSURE SYSTEM CONTINUES TO DEVELOP OFFSHORE. BY WED
MORNING...500 MB HEIGHTS WILL LOWER FROM 5820 TODAY TO ABOUT 5730
...WHICH CORRESPONDS TO ABOUT 6 DEG OF COOLING AT THE SURFACE.
HIGHS ACROSS THE WARMEST DESERTS TOMORROW WILL ONCE AGAIN BE BACK IN
THE MID 60S. MEANWHILE...THE PRESSURE GRADIENT WILL START TO
TIGHTEN...ESPECIALLY OVER THE WRN CWA...FOR INCREASING WESTERLY
WINDS. MOS GUIDANCE IS SUGGESTED 36 KTS SUSTAINED OVER IMPERIAL
COUNTY...AND ABOUT 16 KTS SUSTAINED OVER THE GREATER PHOENIX AREA.
WILL TAKE A CLOSER LOOK AT EXPECTED WINDS FOR WED...AND MAY NEED TO
ISSUE A WIND ADVISORY FOR THE WRN CWA. MEANWHILE...THE BEST JET
DYNAMICS AND MOISTURE ASSOCIATED WITH THIS SYSTEM WILL MOVE THROUGH
THE ERN CWA WED NIGHT INTO THU. H5 HEIGHTS CONTINUE TO FALL RATHER
DRAMATICALLY TO AROUND 550 BY 12Z THU. SIMILAR TO LAST FRIDAYS
WEATHER SYSTEM...THERE WILL NOT BE MUCH IN THE WAY OF MOISTURE WITH
THIS ONE...BUT WITH SUCH IMPRESSIVE JET DYNAMICS AND COLD
ADVECTION...THE SYSTEM WILL BE ABLE TO SQUEEZE OUT ANY AVAILABLE
MOISTURE. AS FOR SNOW...WITH THE 1000-500 MB THICKNESSES LOWERING TO
538 DAM OVER THE FAR ERN CWA EARLY THU...THE SNOW LEVEL WILL DROP TO
AROUND 3500-4000FT (AND FCST SOUNDING SUPPORT THIS). AT ANY
RATE...QPF WILL BE GREATER THE FURTHER EAST YOU GO...WITH ABOUT ONE
TENTH TO ONE QUARTER INCH (AT BEST) EXPECTED OVER THE VALLEY. TEMPS
WILL LOWER INTO THE MID 50S BY THU. OVERALL...THE UPCOMING CHANGES
SEEM TO BE HANDLED WELL IN THE INHERITED FORECAST...AND NO UPDATES
ARE NEEDED AT THIS TIME.

AIR STAGNATION ADVISORY WILL REMAIN IN EFFECT FOR THE SOUTHWEST AND
SOUTH CENTRAL DESERTS THROUGH 5 PM MST TODAY...WITH IMPROVED MIXING
ON TAP FOR LATER TONIGHT AND CERTAINLY ON WEDNESDAY. SEE AWIPS
PRODUCT PHXNPWPSR...WMO ID WWUS75 KPSR NPWPSR...FOR DETAILS.

&&

.LONG TERM...
THURSDAY NIGHT THROUGH NEW YEARS DAY...
MADE SOME MINOR MODIFICATIONS TO MIN/MAX TEMPS FOR FIRST TWO
EXTENDED PERIODS...GENERALLY LOWERING VALUES A HANDFUL OF DEGREES
FROM PREVIOUS FORECAST PER LATEST MODEL SOUNDINGS AND TO BETTER MESH
WITH LATEST TEMP FCSTS FOR THU. UPPER LOW SHOULD BE WELL E OF AREA
ON FRIDAY...BUT LESS WINDS OVER THE DESERTS WILL RESULT IN STUBBORN
NIGHTTIME INVERSIONS...SO BEST WARMING WILL BE HIGHER TERRAIN SITES
INITIALLY ON FRIDAY. NO OTHER CHANGES MADE TO EXTENDED FORECASTS.

PREVIOUS DISCUSSION...
GLOBAL MODEL SOLUTIONS APPEAR TO BE IN GOOD AGREEMENT WITH THE
MOVEMENT OF THE LARGE H5 LOW THAT WILL BE IMPACTING THE REGION MID
TO LATE WEEK AND THE RIDGING EXPECTED OVER THE WEEKEND. SOLUTIONS
BEGIN TO DIVERGE BY EARLY NEXT WEEK...WITH ECMWF INDICATING
PERSISTENT RIDGING AND THE GFS ADVERTISING ANOTHER WEAK TROUGH.

06Z AND 12Z GFS OPERATIONAL RUNS LOOKED TO BE IN FAIRLY DECENT
AGREEMENT...WHICH ALSO CORRESPONDED WELL TO THE 00Z GFS ENSEMBLES
AND THE 12Z ECMWF. THE ECMWF IS A LITTLE SLOWER/DEEPER WITH THE
PROGRESSION OF THE LOW ON FRIDAY. THE GFS HAS BEEN TRENDING TO IT/S
CURRENTLY SOLUTION FOR SEVERAL RUNS NOW. THE GFS FORECAST FROM THE
00Z 22 DEC 2006 OPERATION RUN...VALID AT 12Z FRI...HAD A BROAD OPEN
WAVE CENTERED OVER THE MIDDLE OF THE COUNTRY...WITH ZONAL FLOW OVER
OUR REGION. THE GFS HAS SINCE TRENDED TO A MUCH DEEPER LOW JUST
TO THE EAST OF THE CONTINENTAL DIVIDE...WITH A STRONG N-S ORIENTED
H5 PATTER OVER ARIZONA. GIVEN THE ECMWF SOLUTION AND THE GFS
TRENDS...I OPTED TO EXTEND PRECIPITATION CHANCES OVER S. GILA COUNTY
THROUGH FRIDAY MORNING. BASED ON GFS SOUNDINGS...I WENT WITH A SNOW
LEVEL OF 3500 FEET FOR THURSDAY NIGHT/FRIDAY MORNING. I ALSO
INCREASED CLOUD COVER THROUGH FRIDAY AFTERNOON DUE TO ABUNDANT LOW
LEVEL MOISTURE /LOW CLOUDS/ HANGING ON AS THE LOW SLOWLY PULLS AWAY.

GFS IS INDICATING THAT A SECOND SHORTWAVE WILL DROP DOWN ON THE
BACKSIDE OF THE PARENT LOW ON FRIDAY. THIS WILL BRING ABOUT AN
INCREASE IN SURFACE WINDS ALONG THE LOWER CO. RIVER VALLEY AND
ADJOINING AREAS. BOTH THE GFS AND DGEX ARE ALSO INDICATING THAT MUCH
DRIER AIR WILL BE COMING DOWN THE PIKE. 0 TO 1 KM MIXING RATIOS WILL
BE LESS THAN 1 G/KG...WHICH IS OFTEN INDICATIVE OF SINGLE DIGIT TO
SUB-ZERO DEW POINTS. COUPLED WITH THE BREEZY TO WINDY CONDITIONS...
THERE MAY BE FIRE WEATHER CONCERNS FRIDAY. WILL HAVE TO MONITOR TO
SEE HOW THE MODELS TREND...WITH MUCH OF FRIDAY/S FORECAST HINGING ON
THE DEVELOPMENT AND MOVEMENT OF THE BACKSIDE SHORTWAVE.

H5 RIDGING DEVELOPS FOR THE WEEKEND...WHICH SHOULD BRING MAINLY
CLEAR CONDITIONS TO THE FORECAST AREA. INCREASING CLOUD COVER LATE
IN THE WEEKEND IS DUE TO AN EXPECTED INCREASE IN HIGH CLOUDS AS THE
RIDGE AXIS PASSES ACROSS THE CWA.

GFS IS BRINGING ANOTHER WAVE ACROSS THE AREA EARLY NEXT WEEK. AT
THIS TIME...IT LOOKS TO BE DRY WITH JUST MID/HIGH LEVEL CLOUDS
EXPECTED /NO POPS AT THIS TIME/. HOWEVER...THIS WILL DEFINITELY
REQUIRE MONITORING AS THE GFS AS OF LATE HAS DEPICTED AN INNOCENT
LOOKING WAVE 150+ HOURS OUT...WHICH EVENTUALLY ENDS UP BEING A
RATHER POTENT AND DEEP CUT-OFF LOW. AS I SAID...AT THIS TIME IT
LOOKS LIKE NOT MUCH...BUT WILL WATCH IT.

TEMPERATURES...FRIDAY AND SATURDAY LOOK LIKE THEY/LL BE THE COOL
DAYS OF THE EXTENDED...AS A LARGE/COOL/DRY 1040MB HIGH MOVES INTO
THE WESTERN UNITED STATES. SATURDAY MORNING LOOKS LIKE IT/LL BE THE
COOLEST AT THIS TIME...BUT NOT LOOKING TO BE ANYTHING UNPRECEDENTED.
WARMING TREND BEGINS SATURDAY AS RIDGING DEVELOPS IN EARNEST. COULD
SEE SOME COOLER TEMPERATURES RETURN MID-WEEK WITH SYSTEM MENTIONED
IN PREVIOUS PARAGRAPH.

&&

.AVIATION...
18Z TAFS AND TWEBS ADEQUATELY DEPICT EXPECTED WEATHER. SEE TAFS
PHXTAFPHX...PHXTAFIWA...PHXTAFYUM...LAXTAFBLH AND LAXTAFIPL
FOR MORE DETAILED INFORMATION.

AVIATION DISCUSSION IS NOT UPDATED FOR AMENDED TAFS.

&&

.PSR WATCHES/WARNINGS/ADVISORIES...

AZ...AIR STAGNATION ADVISORY SW AND SOUTH CENTRAL DESERTS...
     ZONES 20>23 AND ZONES 25>28 UNTIL 5 PM MST TODAY.

CA...NONE.

&&

NATIONAL WEATHER SERVICE PHOENIX IS ON THE INTERNET AT

WEATHER.GOV/PHOENIX

22/INIGUEZ

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PHOENIX AZ
431 AM MST TUE DEC 26 2006

AZZ024-271145-
SOUTHERN GILA/TONTO NF FOOTHILLS-
431 AM MST TUE DEC 26 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST-CENTRAL
ARIZONA.

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

A STRONG PACIFIC LOW PRESSURE SYSTEM WILL PUSH THROUGH ARIZONA LATE
WEDNESDAY AND THURSDAY. THIS SYSTEM WILL BE ACCOMPANIED BY GUSTY
WINDS...COLDER TEMPERATURES AND A GOOD CHANCE OF SHOWERS WEDNESDAY
NIGHT AND THURSDAY. SNOW LEVELS WILL BE LOWERING BY LATE WEDNESDAY
NIGHT AND THURSDAY MORNING TO PERHAPS BELOW 4000 FEET. AN INCH OR TWO
OF SNOW IS POSSIBLE BY THURSDAY NOON ABOVE 4500 FEET...WHICH COULD
MAKE FOR SOME SLIPPERY ROADS. THE STORM SYSTEM WILL MOVE OUT OF THE
AREA BY FRIDAY WITH TRANQUIL WEATHER EXPECTED DURING THE HOLIDAY
WEEKEND.

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

SPOTTER ACTIVATION WILL NOT BE NEEDED.

AZZ020-025-CAZ030>033-271145-
LOWER COLORADO RIVER VALLEY AZ-YUMA/MARTINEZ LAKE AND VICINITY-
JOSHUA TREE NATIONAL PARK-LOWER COLORADO RIVER VALLEY CA-
RIVERSIDE COUNTY/EASTERN DESERTS-IMPERIAL COUNTY-
431 AM MST TUE DEC 26 2006 /331 AM PST TUE DEC 26 2006/

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

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

A STRONG PACIFIC LOW PRESSURE SYSTEM WILL MOVE DOWN ACROSS THE AREA
WEDNESDAY AND THURSDAY. ALTHOUGH THIS SYSTEM IS EXPECTED TO BE A DRY
ONE FOR FAR SOUTHEAST CALIFORNIA AND EXTREME WESTERN ARIZONA...IT WILL
LIKELY CAUSE SOME VERY GUSTY WINDS...WITH SOME GUSTS POSSIBLY
SURPASSING 40 MPH. THERE COULD ALSO BE SOME BLOWING DUST AND SAND IN
THE DESERTS BY WEDNESDAY AFTERNOON...CONTINUING INTO THURSDAY. THE
STORM SYSTEM WILL MOVE OUT OF THE AREA BY FRIDAY WITH TRANQUIL
WEATHER EXPECTED DURING THE HOLIDAY WEEKEND.

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

SPOTTER ACTIVATION WILL NOT BE NEEDED.

ESTLE