Wind Advisory 27, NWS Phoenix, AZ

000 
WWUS75 KPSR 071148
NPWPSR

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE PHOENIX AZ
448 AM MST FRI DEC 7 2007

AZZ020-025-CAZ031-080000-
/O.EXA.KPSR.WI.Y.0027.071207T1800Z-071208T0300Z/
LOWER COLORADO RIVER VALLEY AZ-YUMA/MARTINEZ LAKE AND VICINITY-
LOWER COLORADO RIVER VALLEY CA-
INCLUDING THE CITIES OF...EHRENBERG...PARKER...SAN LUIS...
SOMERTON...YUMA...FORTUNA FOOTHILLS...BLYTHE
448 AM MST FRI DEC 7 2007 /348 AM PST FRI DEC 7 2007/

...WIND ADVISORY IN EFFECT FROM 11 AM MST /10 AM PST/ THIS
MORNING TO 8 PM MST /7 PM PST/ THIS EVENING FOR THE LOWER
COLORADO RIVER VALLEY...INCLUDING THE COMMUNITIES OF BLYTHE AND
YUMA...FOR STRONG GUSTY SOUTHWEST WINDS...

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A WIND
ADVISORY...WHICH IS NOW IN EFFECT FROM 11 AM MST /10 AM PST/ THIS
MORNING TO 8 PM MST /7 PM PST/ THIS EVENING. 

A SERIES OF WEATHER SYSTEMS WILL MOVE THROUGH CALIFORNIA AND INTO
ARIZONA OVER THE NEXT FEW DAYS GENERATING WINDY CONDITIONS. STRONG
WINDS IN EXCESS OF 40 MPH WILL AFFECT THE SOUTHEASTERN CALIFORNIA
DESERTS AND THE LOWER COLORADO RIVER VALLEY STARTING MID MORNING
FRIDAY...AND PERSIST INTO THE EARLY EVENING HOURS. SUSTAINED WINDS
SPEEDS BETWEEN 30 AND 40 MPH...WITH GUSTS IN EXCESS OF 45 MPH...ARE
EXPECTED AT MANY LOCALES.

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.

$$

CAZ030-032-033-080000-
/O.CON.KPSR.WI.Y.0027.071207T1800Z-071208T0300Z/
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
348 AM PST FRI DEC 7 2007

...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. 

A SERIES OF WEATHER SYSTEMS WILL MOVE THROUGH CALIFORNIA AND INTO
ARIZONA OVER THE NEXT FEW DAYS FOR WINDY CONDITIONS. STRONG WINDS
IN EXCESS OF 40 MPH WILL AFFECT JOSHUA TREE NATIONAL PARK AND THE
SOUTHEASTERN CALIFORNIA DESERTS STARTING MID MORNING FRIDAY...
AND PERSISTING INTO THE EARLY EVENING HOURS. SUSTAINED WINDS
SPEEDS BETWEEN 30 AND 40 MPH...WITH GUSTS IN EXCESS OF 45 MPH...
ARE EXPECTED.

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.

$$

MEYERS

000 
WWUS75 KPSR 071719
NPWPSR

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE PHOENIX AZ
1019 AM MST FRI DEC 7 2007

CAZ033-080300-
/O.NEW.KPSR.FG.Y.0005.071207T1719Z-071207T1900Z/
/O.CON.KPSR.WI.Y.0027.071207T1800Z-071208T0300Z/
IMPERIAL COUNTY-
INCLUDING THE CITIES OF...BRAWLEY...CALEXICO...EL CENTRO...
GLAMIS...IMPERIAL...AND THE SALTON SEA
919 AM PST FRI DEC 7 2007

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM PST THIS MORNING...
...WIND ADVISORY REMAINS IN EFFECT UNTIL 7 PM PST THIS EVENING...

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A DENSE FOG
ADVISORY...WHICH IS IN EFFECT UNTIL 11 AM PST THIS MORNING. A
WIND ADVISORY REMAINS IN EFFECT UNTIL 7 PM PST THIS EVENING. 

DENSE FOG WILL WILL COVER THE IMPERIAL VALLEY THIS MORNING...INCLUDING
EL CENTRO EASTWARD TO HOLTVILLE. LAW ENFORCEMENT IN THE AREA HAS
REPORTED VISIBILITY AS LOW AS 200 FEET ALONG INTERSTATE 8...BETWEEN
STATE ROUTE 111 AND COUNTY HIGHWAY 32. THE FOG IS EXPECTED TO DECREASE
BY LATE MORNING...WITH VISIBILITY IMPROVING TO AROUND 4 MILES. 

A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE
REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN...
USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE BETWEEN YOU
AND THE VEHICLE AHEAD OF YOU.

A WIND ADVISORY REMAINS IN EFFECT FOR IMPERIAL COUNTY THROUGH 7 PM
PST THIS EVENING. A SERIES OF WEATHER SYSTEMS WILL MOVE THROUGH
CALIFORNIA AND INTO ARIZONA OVER THE NEXT FEW DAYS FOR WINDY
CONDITIONS. STRONG WINDS IN EXCESS OF 40 MPH WILL AFFECT JOSHUA TREE
NATIONAL PARK AND THE SOUTHEASTERN CALIFORNIA DESERTS STARTING MID
MORNING FRIDAY... AND PERSISTING INTO THE EARLY EVENING HOURS.
SUSTAINED WINDS SPEEDS BETWEEN 30 AND 40 MPH...WITH GUSTS IN EXCESS
OF 45 MPH... ARE EXPECTED.

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.


$$

AZZ020-025-CAZ030>032-080300-
/O.CON.KPSR.WI.Y.0027.071207T1800Z-071208T0300Z/
LOWER COLORADO RIVER VALLEY AZ-YUMA/MARTINEZ LAKE AND VICINITY-
JOSHUA TREE NATIONAL PARK-LOWER COLORADO RIVER VALLEY CA-
RIVERSIDE COUNTY/EASTERN DESERTS-
INCLUDING THE CITIES OF...EHRENBERG...PARKER...SAN LUIS...
SOMERTON...YUMA...FORTUNA FOOTHILLS...COTTONWOOD VISITOR CENTER...
LOST HORSE-KEYS VIEW JTNP...BLYTHE...CHIRIACO SUMMIT...
DESERT CENTER...EAGLE MTN...MIDLAND
1019 AM MST FRI DEC 7 2007 /919 AM PST FRI DEC 7 2007/

...WIND ADVISORY REMAINS IN EFFECT UNTIL 8 PM MST /7 PM PST/ THIS
EVENING...

A WIND ADVISORY REMAINS IN EFFECT UNTIL 8 PM MST /7 PM PST/ THIS
EVENING. 

A SERIES OF WEATHER SYSTEMS WILL MOVE THROUGH CALIFORNIA AND INTO
ARIZONA OVER THE NEXT FEW DAYS GENERATING WINDY CONDITIONS.
STRONG WINDS IN EXCESS OF 40 MPH WILL AFFECT THE SOUTHEASTERN
CALIFORNIA DESERTS AND THE LOWER COLORADO RIVER VALLEY STARTING
MID MORNING FRIDAY...AND PERSIST INTO THE EARLY EVENING HOURS.
SUSTAINED WINDS SPEEDS BETWEEN 30 AND 40 MPH...WITH GUSTS IN
EXCESS OF 45 MPH...ARE EXPECTED AT MANY LOCALES.

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.

$$

000 
WWUS75 KPSR 071922
NPWPSR

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE PHOENIX AZ
1222 PM MST FRI DEC 7 2007

CAZ033-080300-
/O.EXP.KPSR.FG.Y.0005.000000T0000Z-071207T1900Z/
/O.CON.KPSR.WI.Y.0027.000000T0000Z-071208T0300Z/
IMPERIAL COUNTY-
INCLUDING THE CITIES OF...BRAWLEY...CALEXICO...EL CENTRO...
GLAMIS...IMPERIAL...AND THE SALTON SEA
1122 AM PST FRI DEC 7 2007

...WIND ADVISORY REMAINS IN EFFECT UNTIL 7 PM PST THIS EVENING FOR
IMPERIAL COUNTY...
...DENSE FOG ADVISORY HAS EXPIRED FOR IMPERIAL COUNTY...

THE DENSE FOG ADVISORY FOR IMPERIAL COUNTY...INCLUDING THE GREATER
IMPERIAL VALLEY...IS NO LONGER IN EFFECT. A WIND ADVISORY REMAINS IN
EFFECT UNTIL 7 PM PST THIS EVENING.

A WIND ADVISORY REMAINS IN EFFECT FOR IMPERIAL COUNTY THROUGH
7 PM PST THIS EVENING. A SERIES OF WEATHER SYSTEMS WILL MOVE
THROUGH CALIFORNIA AND INTO ARIZONA OVER THE NEXT FEW DAYS FOR
WINDY CONDITIONS. STRONG WINDS IN EXCESS OF 40 MPH WILL CONTINUE TO
AFFECT THE SOUTHEASTERN CALIFORNIA DESERTS INTO THE EARLY EVENING
HOURS. SUSTAINED WINDS SPEEDS BETWEEN 30 AND 40 MPH...WITH GUSTS IN
EXCESS OF 45 MPH...ARE EXPECTED.

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.

$$

AZZ027-028-080300-
/O.EXA.KPSR.WI.Y.0027.000000T0000Z-071208T0300Z/
SOUTHWEST MARICOPA COUNTY-
NORTHWEST AND NORTH CENTRAL PINAL COUNTY-
INCLUDING THE CITIES OF...GILA BEND...APACHE JUNCTION...
CASA GRANDE...COOLIDGE...FLORENCE
1222 PM MST FRI DEC 7 2007

...WIND ADVISORY IN EFFECT UNTIL 8 PM MST THIS EVENING FOR
SOUTHWEST MARICOPA...NORTHWEST AND NORTH CENTRAL PINAL COUNTIES...

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A WIND
ADVISORY...WHICH IS IN EFFECT UNTIL 8 PM MST THIS EVENING...
FOR SOUTHWEST MARICOPA...NORTHWEST AND NORTH CENTRAL PINAL
COUNTIES.

A SERIES OF WEATHER SYSTEMS WILL MOVE THROUGH CALIFORNIA AND INTO
ARIZONA OVER THE NEXT FEW DAYS GENERATING WINDY CONDITIONS. 
STRONG WINDS IN EXCESS OF 40 MPH WILL AFFECT SOUTHWEST
MARICOPA...NORTH AND NORTH CENTRAL PINAL COUNTIES THROUGH 8 PM MST
THIS EVENING. SUSTAINED WINDS SPEEDS BETWEEN 30 AND 40 MPH...WITH
GUSTS IN EXCESS OF 45 MPH...ARE EXPECTED AT MANY LOCALES. 

AREAS IN THE ADVISORY INCLUDE...BUT ARE NOT LIMITED TO...GILA
BEND...MARICOPA...CASA GRANDE...COOLIDGE...AND FLORENCE. PERSONS
TRAVELING ALONG INTERSTATE 8 BETWEEN SENTINEL AND CASA GRANDE SHOULD
BE PREPARED FOR STRONG SOUTHERLY CROSS WINDS...AS WELL AS AREAS OF
BLOWING DUST WITH REDUCTION IN VISIBILITY BELOW 1 MILE AT TIMES.

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.

$$

AZZ020-025-CAZ030>032-080300-
/O.CON.KPSR.WI.Y.0027.000000T0000Z-071208T0300Z/
LOWER COLORADO RIVER VALLEY AZ-YUMA/MARTINEZ LAKE AND VICINITY-
JOSHUA TREE NATIONAL PARK-LOWER COLORADO RIVER VALLEY CA-
RIVERSIDE COUNTY/EASTERN DESERTS-
INCLUDING THE CITIES OF...EHRENBERG...PARKER...SAN LUIS...
SOMERTON...YUMA...FORTUNA FOOTHILLS...COTTONWOOD VISITOR CENTER...
LOST HORSE-KEYS VIEW JTNP...BLYTHE...CHIRIACO SUMMIT...
DESERT CENTER...EAGLE MTN...MIDLAND
1222 PM MST FRI DEC 7 2007 /1122 AM PST FRI DEC 7 2007/

...WIND ADVISORY REMAINS IN EFFECT UNTIL 8 PM MST /7 PM PST/ THIS
EVENING FOR JOSHUA TREE NATIONAL PARK...SOUTHEAST CALIFORNIA DESERTS
...AND THE LOWER COLORADO RIVER VALLEY...

A WIND ADVISORY REMAINS IN EFFECT UNTIL 8 PM MST /7 PM PST/ THIS
EVENING FOR JOSHUA TREE NATIONAL PARK...EASTERN RIVERSIDE COUNTY
...AND THE LOWER COLORADO RIVER VALLEY. 

A SERIES OF WEATHER SYSTEMS WILL MOVE THROUGH CALIFORNIA AND INTO
ARIZONA OVER THE NEXT FEW DAYS GENERATING WINDY CONDITIONS.
STRONG WINDS IN EXCESS OF 40 MPH WILL CONTINUE TO AFFECT THE
SOUTHEAST CALIFORNIA AND THE LOWER COLORADO RIVER VALLEY INTO THE
EARLY EVENING HOURS. SUSTAINED WINDS SPEEDS BETWEEN 30 AND 40
MPH...WITH GUSTS IN EXCESS OF 45 MPH...ARE EXPECTED AT MANY LOCALES.

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.

$$

LW

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PHOENIX AZ
1205 PM MST THUR DEC 6 2007

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

.SYNOPSIS...
A MAJOR STORM SYSTEM IS BEGINNING TO DEVELOP NEAR THE CALIFORNIA
COAST...AND IS EXPECTED TO BECOME BETTER ORGANIZED THIS WEEKEND.
WINDY CONDITIONS WILL ARRIVE ON FRIDAY...ESPECIALLY IN SOUTHEAST
CALIFORNIA...AHEAD OF THE COOLER AIR THAT IS EXPECTED ON SATURDAY
AND SUNDAY. THE BEST CHANCE OF SHOWERS...AND A SLIGHT CHANCE OF A
THUNDERSTORM OR TWO...IS EXPECTED ON SUNDAY. ALTHOUGH THE AMOUNTS OF
RAIN WILL NOT BE AS HEAVY AS LAST WEEKENDS STORM...LOOK FOR THE BEST
AMOUNTS TO BE OVER THE HIGHER TERRAIN EAST AND NORTH OF THE PHOENIX
AREA. THE COOL AIR WILL LAST INTO NEXT WEEK...ALONG WITH DRY
CONDITIONS.

&&

.SHORT TERM...
TODAY THROUGH SATURDAY...
WESTERLY FLOW ALOFT HAS ALLOWED MID AND HIGH LEVEL HUMIDITY TO
INCREASE ACROSS THE AREA. WATER VAPOR IMAGERY SHOWED THE MOISTURE
ASSOCIATED WITH THIS SYSTEM STREAMING RAPIDLY ACROSS MAINLY NORTHERN
ARIZONA. IN ADDITION THE SURFACE TO 700 MB MOISTURE HAS ALSO
INCREASED WITH THE RESULTING FOG IN PARTS OF IMPERIAL COUNTY EARLIER
THIS MORNING.
MODELS HAVE BEEN FAIRLY CONSISTENT...SHOWING THE COMPLEX PATTERN OF
TROUGHS/UPPER LOWS ACROSS THE AREA FRIDAY INTO SUNDAY. INITIAL
FRONTAL BAND STILL EXPECTED TO SWEEP ACROSS THE AREA WITH SHOWERS
LIKELY FRIDAY AFTERNOON AND EVENING...BUT AMOUNTS WILL NOT BE AS
MUCH AS PREVIOUSLY FORECAST. BEST AMOUNTS STILL OVER THE HIGHER
ELEVATIONS.

&&

.LONG TERM...
SATURDAY NIGHT THROUGH WEDNESDAY...
MADE A COUPLE OF MINOR ADJUSTMENTS TO THE EXTENDED FORECAST. BASED
ON LATEST GFS/EUROPEAN RUNS BEING VERY SIMILAR AND SLOWER TO PUSH
THE DEEP TROF OUT OF ARIZONA...HAVE RAISED POPS OVER THE CENTRAL AND
WESTERN CWA SUNDAY NIGHT THROUGH MONDAY NIGHT. THIS BETTER FITS WITH
OUR NEIGHBORS...AND AGREES MUCH BETTER WITH LATEST MEX MOS POPS.
ALSO LOWERED HIGH TEMPS A COUPLE DEGREES SUNDAY AND MONDAY.

.PREVIOUS DISUSSION...
GFS/ECMWF IN FAIRLY GOOD AGREEMENT THAT SECONDARY SHORT WAVE WILL
DROP SOUTH OVER SOUTHERN CALIFORNIA AND NORTHERN BAJA CALIFORNIA
SUNDAY...HELPING TO DEEPEN THE LONG WAVE TROUGH SET UP OVER THE
SOUTHWEST CONUS. IN FACT...BOTH MODELS SHOW A CUTOFF LOW DEVELOPING
NEAR NORTHERN BAJA/SOUTHWEST ARIZONA SUNDAY AFTERNOON. THIS SECONDARY
IMPULSE WILL HELP COOL MID LEVELS OF THE ATMOSPHERE...INCREASING
INSTABILITY. THIS...COMBINED WITH SUSTAINED ABUNDANT LOW-LEVEL
MOISTURE AND DECENT VERTICAL WIND SHEER WILL RESULT IN A CHANCE OF
THUNDERSTORMS THROUGHOUT SUNDAY...ESPECIALLY ACROSS MARICOPA COUNTY
AND SOUTHERN GILA COUNTY. THE COLDER AIR ALOFT WILL ALSO DROP SNOW
LEVELS ACROSS SOUTHERN GILA COUNTY TO NEAR 5000 FEET SUNDAY WITH
SNOW SHOWERS POSSIBLE...THEN THE SNOW LEVEL IS EXPECTED TO INCREASE
TO 6000 FEET BY MONDAY AFTERNOON. CHANCE POPS WILL CONTINUE ACROSS
THE SOUTH-CENTRAL ARIZONA MONDAY...DRYING OUT ACROSS THE ENTIRE AREA
TUESDAY AS THE LOW PRESSURE SYSTEM IS FORECAST TO LIFT EASTWARD.
TEMPERATURES WILL INCREASE SLIGHTLY BY MID WEEK...BUT ARE EXPECTED
TO REMAIN AT OR BELOW SEASONAL NORMALS FOR MID-DECEMBER.

&&

.AVIATION...
DECEMBER 6 1828 GMT (DECEMBER 6 1128 MST)

SOUTHERLY WINDS WILL DEVELOP THIS AFTERNOON AREA WIDE AND CONTINUE
OVERNIGHT AT MOST PLACES BEFORE VERY STRONG SOUTHWESTERLY
WINDS...GUSTING TO 30-35 KNOTS...DEVELOP DURING THE DAY FRIDAY. AT
KPHX...SOUTH-SOUTHEASTERLY WINDS WILL DEVELOP AFTER 16Z SLOWLY
SHIFTING TO SOUTHWESTERLY BY 22Z. IT IS POSSIBLE THE WESTERLY
COMPONENT WILL DEVELOP SOONER BUT THERE WILL BE A PERIOD OF
SOUTHERLY CROSS WINDS...AS HIGH AS 10 KNOTS BEFORE THAT HAPPENS. IN
ADDITION...HAZY CONDITIONS WITH VISIBILITIES NEAR 10 MILES MAY LEAD
TO SLANT VISIBILITY PROBLEMS UNTIL ABOUT 17Z WHEN THE SUN ANGLE
IMPROVES.

AVIATION DISCUSSION IS NOT UPDATED FOR AMENDED TAFS.

&&

.FIRE WEATHER
DECEMBER 6 1255 GMT (DECEMBER 6 0555 MST)

FRIDAY NIGHT THROUGH WEDNESDAY...
AN UPPER LOW WILL BE CENTERD OVER FAR NORTHWEST MEXICO THIS WEEKEND
LEADING TO UNSETTLED WEATHER CONDITIONS WITH A CHANCE OF SHOWERS
AREA WIDE SATURDAY THROUGH MONDAY...ALONG WITH A SLIGHT CHANCE OF
THUNDERSTORMS SUNDAY AND MONDAY. THE RAIN CHANCES WILL BEGIN TO
DIMINISH MONDAY NIGHT AS THE LOW MOVES EASTWARD. A DECREASE IN
MINIMUM HUMIDITIES CAN BE EXPECTED MONDAY THROUGH WEDNESDAY WITH A
SLOW INCREASE IN MAX TEMPERATURES.

.PSR WATCHES/WARNINGS/ADVISORIES...

AZ...NONE

CA...NONE

&&

NATIONAL WEATHER SERVICE PHOENIX IS ON THE INTERNET AT

WEATHER.GOV/PHOENIX

SHORT TERM...SIPPLE
LONG TERM...CB/P ROGERS
AVIATION...AJ
FIRE WEATHER...AJ

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PHOENIX AZ
1114 AM MST THU DEC 6 2007

AZZ021>024-026>028-071400-
WEST CENTRAL DESERTS-NORTHWEST MARICOPA COUNTY-
GREATER PHOENIX AREA-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHWEST DESERTS-SOUTHWEST MARICOPA COUNTY-
NORTHWEST AND NORTH CENTRAL PINAL COUNTY-
1114 AM MST THU DEC 6 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST-CENTRAL
ARIZONA...SOUTH-CENTRAL ARIZONA...SOUTHWEST ARIZONA AND WEST-
CENTRAL ARIZONA.

.DAY ONE...TODAY AND TONIGHT

NO WEATHER HAZARDS EXPECTED.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

A WEATHER SYSTEM FROM THE PACIFIC NORTHWEST IS EXPECTED TO BRING A
POTENTIALLY SIGNIFICANT PRECIPITATION EVENT TO SOUTH-CENTRAL AND
SOUTHWEST ARIZONA...INCLUDING THE PHOENIX METROPOLITAN
AREA...BEGINNING ON FRIDAY. THE BEST CHANCE FOR HEAVY RAIN WILL
LIKELY BE FRIDAY AFTERNOON AND EVENING...ASSOCIATED WITH A COLD
FRONTAL PASSAGE. SOME LOCATIONS MAY PICK UP BETWEEN ONE HALF...AND
ONE INCH...OF RAINFALL...WITH LOCALLY HIGHER AMOUNTS POSSIBLE IN THE
UPSLOPE AREAS OF SOUTHERN GILA COUNTY. THERE IS POTENTIAL FOR URBAN
AND SMALL STREAM FLOODING TO OCCUR. VERY COOL AND UNSETTLED CONDITIONS
WILL CONTINUE SATURDAY THROUGH A LEAST MONDAY MORNING. ISOLATED
THUNDERSTORMS ARE POSSIBLE AS WELL...MAINLY DURING THE AFTERNOON...ON
SUNDAY AND MONDAY. LOCALLY HEAVY RAINFALL WOULD BE POSSIBLE IN
ASSOCIATION WITH A STRONG THUNDERSTORM.

ALSO...IT WILL BE QUITE WINDY ON FRIDAY...IN ASSOCIATION WITH THE
FRONTAL PASSAGE...ESPECIALLY OVER THE WESTERN DESERTS. WINDS MAY BE
STRONG ENOUGH TO PRODUCE DENSE BLOWING DUST PRIOR TO THE SHOWERS.

THIS WILL BE A RELATIVELY COLD WEATHER SYSTEM...AND SNOW WILL BE
POSSIBLE ABOVE 5000 FEET BEGINNING SATURDAY NIGHT. A FEW INCHES OF
WET SNOW IS POSSIBLE IN THE HIGHER ELEVATIONS OF SOUTHERN GILA
COUNTY. IT SHOULD BE NOTED THAT THERE IS STILL UNCERTAINTY REGARDING
HOW THE SYSTEM WILL EVOLVE THIS WEEKEND AND INTO NEXT WEEK...AND THE
HIGHEST CONFIDENCE FOR HEAVY RAIN REMAINS THIS FRIDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED AT THIS TIME.

AZZ020-025-CAZ031-033-071400-
LOWER COLORADO RIVER VALLEY AZ-YUMA/MARTINEZ LAKE AND VICINITY-
LOWER COLORADO RIVER VALLEY CA-IMPERIAL COUNTY-
1114 AM MST THU DEC 6 2007 /1014 AM PST THU DEC 6 2007/

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

.DAY ONE...TODAY AND TONIGHT

NO WEATHER HAZARDS EXPECTED.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

A WEATHER SYSTEM FROM THE PACIFIC NORTHWEST IS EXPECTED TO BRING
SHOWERS FRIDAY TO SOUTHEAST CALIFORNIA AND THE LOWER COLORADO RIVER
VALLEY. THERE IS AN OUTSIDE POSSIBILITY THAT RAINFALL WILL BE ENOUGH
TO PRODUCE LOCALIZED URBAN AND SMALL STREAM FLOODING. IT WILL ALSO BE
QUITE WINDY DURING THE DAY...ASSOCIATED WITH THE COLD FRONTAL
PASSAGE...AND THE WINDS MAY BE ABLE TO PRODUCE BLOWING DUST AND SAND.
UNSETTLED CONDITIONS WILL CONTINUE SATURDAY THROUGH AT LEAST NEXT
MONDAY...AND BRIEF MODERATE TO HEAVY RAIN IS POSSIBLE DURING THIS
TIME FRAME. ISOLATED AFTERNOON THUNDERSTORMS COULD OCCUR
SUNDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED AT THIS TIME.

CAZ030-032-071400-
JOSHUA TREE NATIONAL PARK-RIVERSIDE COUNTY/EASTERN DESERTS-
1014 AM PST THU DEC 6 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EXTREME
SOUTHEAST CALIFORNIA AND SOUTHEAST CALIFORNIA.

.DAY ONE...TODAY AND TONIGHT

NO WEATHER HAZARDS ARE EXPECTED.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

A WEATHER SYSTEM FROM THE PACIFIC NORTHWEST IS EXPECTED TO BRING
SHOWERS TO RIVERSIDE COUNTY ON FRIDAY. THERE IS AN OUTSIDE
POSSIBILITY THAT THERE WILL BE ENOUGH RAINFALL TO PRODUCE LOCALIZED
SMALL STREAM FLOODING. UNSETTLED CONDITIONS WILL REMAIN SATURDAY
THROUGH AT LEAST MONDAY MORNING...AND THERE WILL CONTINUE TO BE A
THREAT FOR BRIEF HEAVY RAIN DURING THIS TIME PERIOD. WINDY WEATHER IS
LIKELY FRIDAY ASSOCIATED WITH A COLD FRONTAL PASSAGE...AND IT MAY
LEAD TO SOME BLOWING DUST AT TIMES.

IN ADDITION...THIS WILL BE A RELATIVELY COLD WEATHER SYSTEM AND THE
SNOW LEVEL WILL LOWER TO NEAR 4000 FEET BY SATURDAY NIGHT. SNOW WILL
BE POSSIBLE ABOVE THIS LEVEL...AFFECTING PORTIONS OF JOSHUA TREE
NATIONAL PARK...BUT SIGNIFICANT ACCUMULATIONS ARE NOT EXPECTED AT
THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED AT THIS TIME.