Snow Advisory 9, NWS Las Vegas, NV

000 
WWUS45 KVEF 261910
WSWVEF

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE LAS VEGAS NV
1110 AM PST MON FEB 26 2007

CAZ519-270000-
/O.CON.KVEF.SN.Y.0009.070227T0200Z-070227T1400Z/
EASTERN SIERRA SLOPES-
INCLUDING THE CITIES OF...ASPENDELL...MT WHITNEY
1110 AM PST MON FEB 26 2007

...SNOW ADVISORY REMAINS IN EFFECT FROM 6 PM THIS EVENING TO 6 AM
PST TUESDAY...

A SNOW ADVISORY REMAINS IN EFFECT FROM 6 PM THIS EVENING TO 6 AM
PST TUESDAY FOR THE EAST SLOPES OF THE SOUTHERN SIERRA.

A PACIFIC STORM WILL BRING ANOTHER ROUND OF SNOW TO THE SIERRA THIS
EVENING THROUGH EARLY TUESDAY MORNING. MOST OF THE SNOW WILL FALL
ON THE WEST SIDE OF THE CREST...BUT UP TO 7 INCHES CAN BE EXPECTED
IN A NARROW STRIP JUST EAST OF THE CREST...INCLUDING AREAS SUCH AS
ASPENDELL AND MOUNT TOM.

A SNOW ADVISORY IS ISSUED WHEN SNOW IS EXPECTED TO DEVELOP...BUT
ONLY ENOUGH TO CAUSE MINOR INCONVENIENCES SUCH AS TRAVEL DELAYS.
NO SEVERE WINTER WEATHER IS EXPECTED AT THIS TIME.

$$

000 
WWUS45 KVEF 262352
WSWVEF

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE LAS VEGAS NV
352 PM PST MON FEB 26 2007

CAZ519-270600-
/O.CON.KVEF.SN.Y.0009.070227T0200Z-070227T1400Z/
EASTERN SIERRA SLOPES-
INCLUDING THE CITIES OF...ASPENDELL...MT WHITNEY
352 PM PST MON FEB 26 2007

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 6 AM PST TUESDAY...

A SNOW ADVISORY REMAINS IN EFFECT UNTIL 6 AM PST TUESDAY FOR THE
EAST SLOPES OF THE SOUTHERN SIERRA.

A PACIFIC STORM MOVING INTO THE CALIFORNIA COAST WILL BRING SNOW
MAINLY TO THE WEST SLOPES OF THE SOUTHERN SIERRA. HOWEVER...LIGHT
SNOW WILL BEGIN TO FALL THIS EVENING OVER A NARROW STRIP EAST OF
THE CREST...INCLUDING AREAS SUCH AS ASPENDELL AND MOUNT TOM. SNOW
WILL INCREASE AFTER MIDNIGHT THEN TAPER OFF TUESDAY MORNING.
ACCUMULATIONS OF 3 TO 7 INCHES CAN BE EXPECTED.

A SNOW ADVISORY IS ISSUED WHEN SNOW IS EXPECTED TO DEVELOP...BUT
ONLY ENOUGH TO CAUSE MINOR INCONVENIENCES SUCH AS TRAVEL DELAYS.
NO SEVERE WINTER WEATHER IS EXPECTED AT THIS TIME.

$$

JGA

000 
WWUS45 KVEF 270455
WSWVEF

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE LAS VEGAS NV
855 PM PST MON FEB 26 2007

CAZ519-271200-
/O.CON.KVEF.SN.Y.0009.000000T0000Z-070227T1400Z/
EASTERN SIERRA SLOPES-
INCLUDING THE CITIES OF...ASPENDELL...MT WHITNEY
855 PM PST MON FEB 26 2007

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 6 AM PST TUESDAY...

A SNOW ADVISORY REMAINS IN EFFECT UNTIL 6 AM PST TUESDAY FOR
EASTERN SLOPES OF THE SOUTHERN SIERRA MOUNTAINS.

A LOCAL STORM SPOTTER OUT OF ASPENDELL INDICATED LIGHT SNOW
FALLING WITH A 1/2 INCH OF NEW SNOW AS OF 845 PM PST. SNOWFALL IS
EXPECTED TO CONTINUE THROUGHOUT THE NIGHT...WITH THE HEAVIEST SNOW
EXPECTED TO OCCUR BETWEEN MIDNIGHT AND 4 AM PST.

A PACIFIC STORM MOVING INTO THE CALIFORNIA COAST WILL BRING SNOW
MAINLY TO THE WEST SLOPES OF THE SOUTHERN SIERRA. HOWEVER...LIGHT
SNOW WILL BEGIN TO FALL THIS EVENING OVER A NARROW STRIP EAST OF
THE CREST...INCLUDING AREAS SUCH AS ASPENDELL AND MOUNT TOM. SNOW
WILL INCREASE AFTER MIDNIGHT THEN TAPER OFF TUESDAY MORNING.
ACCUMULATIONS OF 3 TO 7 INCHES CAN BE EXPECTED.

A SNOW ADVISORY IS ISSUED WHEN SNOW IS EXPECTED TO DEVELOP...BUT
ONLY ENOUGH TO CAUSE MINOR INCONVENIENCES SUCH AS TRAVEL DELAYS.
NO SEVERE WINTER WEATHER IS EXPECTED AT THIS TIME.

$$

000 
WWUS45 KVEF 271142
WSWVEF

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE LAS VEGAS NV
342 AM PST TUE FEB 27 2007

CAZ519-271400-
/O.CON.KVEF.SN.Y.0009.000000T0000Z-070227T1400Z/
EASTERN SIERRA SLOPES-
INCLUDING THE CITIES OF...ASPENDELL...MT WHITNEY
342 AM PST TUE FEB 27 2007

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 6 AM PST EARLY THIS
MORNING...

A SNOW ADVISORY REMAINS IN EFFECT UNTIL 6 AM PST EARLY THIS
MORNING FOR THE EASTERN SIERRA SLOPES. 

AT 3 AM...SATELLITE AND RADAR SHOWED PRECIPITATION COVERING THE
ADVISORY AREA AS A COLD FRONT MOVED THROUGH. NO NEW SPOTTER
REPORTS HAD BEEN RECEIVED SINCE YESTERDAY EVENING...BUT SEVERAL
INCHES OF SNOW HAVE LIKELY FALLEN ON THE SLOPES OVERNIGHT. THE
SNOW IS EXPECTED TO CONTINUE UNTIL AT LEAST 6 AM BEFORE TAPERING
OFF TO SHOWERS LATER IN THE MORNING. TOTALS UP TO 7 INCHES ARE
EXPECTED.

A SNOW ADVISORY IS ISSUED WHEN SNOW IS EXPECTED TO DEVELOP...BUT
ONLY ENOUGH TO CAUSE MINOR INCONVENIENCES SUCH AS TRAVEL DELAYS.
NO SEVERE WINTER WEATHER IS EXPECTED AT THIS TIME.

$$

MORGAN

000 
WWUS45 KVEF 271345
WSWVEF

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE LAS VEGAS NV
545 AM PST TUE FEB 27 2007

CAZ519-271445-
/O.EXP.KVEF.SN.Y.0009.000000T0000Z-070227T1400Z/
EASTERN SIERRA SLOPES-
INCLUDING THE CITIES OF...ASPENDELL...MT WHITNEY
545 AM PST TUE FEB 27 2007

...SNOW ADVISORY WILL EXPIRE AT 6 AM PST EARLY THIS MORNING...

THE SNOW ADVISORY FOR THE EASTERN SIERRA SLOPES WILL EXPIRE AT 6
AM PST EARLY THIS MORNING.

AT 530 AM...RADAR SHOWED THAT THE SNOW OVER THE SIERRAS WAS
BECOMING MORE SHOWERY IN NATURE. ALTHOUGH SOME SPOTS MAY STILL
RECEIVE A FEW MORE INCHES OF SNOW IN SHOWERS...THE THREAT FOR
WIDESPREAD SIGNIFICANT SNOW WAS ENDING...AND THE ADVISORY WILL BE
ALLOWED TO EXPIRE AT 6 AM.

$$

MORGAN

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
304 AM PST MON FEB 26 2007

.SYNOPSIS...A STORM SYSTEM OFF THE PACIFIC NORTHWEST COAST WILL MOVE
INLAND TUESDAY AND WEDNESDAY PRODUCING GUSTY SOUTHWEST WINDS AND A
CHANCE OF SHOWERS OVER MUCH OF THE AREA. COLDER TEMPERATURES ARE
ALSO EXPECTED AS A COLD FRONT MOVES THROUGH. THE AIRMASS BEHIND THE
FRONT WILL KEEP TEMPERATURES BELOW AVERAGE THROUGH MUCH OF NEXT
WEEK.
&&

.SHORT TERM...TOO MANY ISSUES THIS MORNING TO DISCUSS THEM ALL. HIGH
POINTS ARE WINDS AND PRECIP. WIND ADVISORY UNTIL 4 AM FOR CA ZONE
520 IS PROBLEMATIC. CURRENTLY NO STATIONS ARE MEETING CRITERIA
THERE...BUT ONE STATION IN ZONE 519 IS. MODELS THINK THE WINDS
SHOULD HAVE DIED DOWN BY NOW...BUT COMPARING MODEL MSLP PROGS WITH
MSAS PLOTS SHOWS THAT THE OBSERVED GRADIENT IS MUCH GREATER THAN THE
MODEL GRADIENTS. WILL MAKE A LAST MINUTE CALL ON THIS ONE. WIND
ADVISORY UNTIL 4 AM FOR CA ZONE 523 IS STILL WORKING OUT WITH 4
STATIONS MEETING CRITERIA AS OF 2 AM. QUESTION IS WHETHER OR NOT TO
EXTEND THE ADVISORY...AS INDIVIDUAL STATION TRENDS ARE NEARLY
STEADY. THE ABOVE SENTENCE REGARDING MODEL GRADIENTS AND ACTUAL
GRADIENTS APPLIES HERE AS WELL. AGAIN...PROBABLY A LAST MINUTE CALL.
STILL EXPECT WINDS TO KICK UP ACROSS THE MOJAVE DESERT TOMORROW
AFTERNOON...BUT PROBABLY REMAINING BELOW HIGH WIND WARNING CRITERIA.
ALSO STILL SOME QUESTION ABOUT HOW FAR EAST THE WINDS MAY EXTEND.
RATHER THAN ISSUING A THIRD PERIOD ADVISORY...WILL FRESHEN UP THE
HWO AND ADVISE THE DAY CREW. NOW ON TO PRECIP. ALL IS QUIET AT THE
MOMENT BUT THAT WILL CHANGE LATE THIS EVENING AS THE NEXT FRONT
ROLLS IN FROM THE NORTHWEST. IT WILL IMPACT THE SIERRAS
TONIGHT...BRINGING COLDER AIR AND A DECENT SLUG OF MOISTURE...BUT
THE MAIN QUESTION IS HOW MUCH PRECIP WILL MAKE IT OVER THE CREST.
TRAJECTORIES SUGGEST LOTS OF SHADOWING...BUT HIGH SPEED WEST WINDS
ALOFT MAY PUSH SOME SNOW DOWNWIND OF THE CREST. AS WAS THE CASE A
COUPLE OF STORMS AGO...THERE MAY BE A SHARP GRADIENT NEAR ASPENDELL
OF SNOW/NO SNOW. AFTER COORDINATION WITH WFO HNX...ISSUED A SNOW
ADVISORY FOR THE EASTERN SLOPES VALID THIS EVENING THROUGH EARLY
TOMORROW MORNING. CONFIDENCE HERE IS LESS THAN AVERAGE DUE TO THE
SHARP PRECIP CUTOFF EXPECTED. DURING THE DAY TOMORROW...THE MODELS
ALSO SHOW A LOW LEVEL CONVERGENCE ZONE WITH ASSOCIATED FRONTOGENESIS
AND SOME UPPER DIVERGENCE OVER LINCOLN COUNTY. THIS COULD LEAD TO
BANDED MODERATE TO HEAVY SNOW. HAVE NOT ISSUED A WSW FOR THIS
YET...BUT WILL BE EXAMINING THINGS FURTHER EARLY THIS MORNING.
RATHER THAN EXPOUNDING ON THE CLOUDY SKIES AND CHILLY TEMPERATURES
TO ACCOMPANY THIS FRONT...WILL STICK WITH THE CONDENSED BOOK VERSION
FOR NOW.

.LONG TERM...GFS...ECMWF...DGEX...AND GEM ALL LOOK TO BE IN GOOD
AGREEMENT FOR THE PERIOD BEGINNING ON THURSDAY. A LARGE RIDGE WITH
ITS AXIS ALONG 140W WILL SLOWLY TRANSITION EASTWARD DURING THE END
OF THE WEEK AND INTO THE WEEKEND...WITH THE RIDGE AXIS OVER THE
FORECAST AREA BY LATE SATURDAY/EARLY SUNDAY. THEREFORE...CLOUD
COVERAGE WILL BE MINIMAL OVER THE PERIOD AND WITH THICKNESS
INCREASING OVER 25DM ON AVG ACROSS THE CWA...TEMPS SHOULD FULLY
RECOVER BY SATURDAY AND BECOME ABOVE NORMAL BY SUNDAY AFTERNOON.
&&

.AVIATION...FOR KLAS: SOUTH TO SOUTHWEST WINDS WILL CONTINUE THROUGH
THE MORNING HOURS AND THEN INCREASE TO SUSTAINED WIND SPEEDS BETWEEN
13 AND 20 KTS WITH GUSTS 25 TO 30 KTS BY NOON. EXPECT RELATIVELY
STRONG SOUTHWEST WINDS TO CONTINUE UNTIL WEDNESDAY MORNING. TUESDAY
AFTERNOON A STORM SYSTEM WILL BEGIN TO IMPACT THE AREA BRINGING A
SLIGHT CHANCE OF PRECIP/CIGS BELOW 060KFT IN ADDITION TO GUSTY
SURFACE WINDS.

FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA: EXPECT GUSTY SOUTH/SOUTHWEST SURFACE WINDS AT ALL
LOCATIONS TODAY WITH SUSTAINED/GUST SPEEDS OF AROUND 20/30KTS...AND
30/40KTS POSSIBLE AT KDAG. TUESDAY... A STORM SYSTEM WILL MOVE
ONSHORE RESULTING IN CONTINUED GUSTY SURFACE WINDS AND A CHANCE OF
PRECIP AT ALL TERMINALS.
&&

.VEF WATCHES/WARNINGS/ADVISORIES...
.NV...NONE.
.AZ...NONE.
.CA...WIND ADVISORY ZONES 520 AND 523 UNTIL 4 AM THIS MORNING.
      SNOW ADVISORY ZONE 519 6 PM THIS EVENING UNTIL 6 AM TUESDAY.
&&

MORGAN/KENNEDY

HTTP://WEATHER.GOV/LASVEGAS

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LAS VEGAS NV
521 AM PST SUN FEB 25 2007

CAZ519-520-260430-
EASTERN SIERRA SLOPES-OWENS VALLEY-
521 AM PST SUN FEB 25 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CALIFORNIA.

.DAY ONE...TODAY AND TONIGHT

A HIGH WIND WARNING IS IN EFFECT FOR THE EASTERN SLOPES OF THE
SOUTHERN SIERRA AND THE OWENS VALLEY UNTIL 7 PM. STRONG WEST
WINDS WITH GUSTS UP TO 100 MPH CAN BE EXPECTED OVER THE SIERRA
CREST...AND LOCALLY GUSTY WEST AND EAST WINDS CAN BE EXPECTED IN
THE OWENS VALLEY IN ASSOCIATION WITH DOWNSLOPE WINDS AND ROTORS.
THE WINDS WILL SUBSIDE THIS EVENING.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

ANOTHER STORM SYSTEM WILL BRING MORE STRONG WINDS MONDAY NIGHT
INTO TUESDAY...ALONG WITH A BETTER CHANCE OF SNOW AT THE HIGHER
ELEVATIONS. SLIGHTLY LESS ACTIVE WEATHER IS EXPECTED TOWARDS THE
END OF THE WEEK.

.SPOTTER INFORMATION STATEMENT...

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

AZZ001>003-036-CAZ521>527-NVZ014>022-260430-
NORTHWEST PLATEAU-LOWER COLORADO RIVER VALLEY-NORTHWEST DESERTS-
LAKE MEAD NATIONAL RECREATION AREA-WHITE MOUNTAINS OF INYO COUNTY-
DEATH VALLEY NATIONAL PARK-WESTERN MOJAVE DESERT-
EASTERN MOJAVE DESERT-MORONGO BASIN-CADIZ BASIN-
SAN BERNARDINO COUNTY-UPPER COLORADO RIVER VALLEY-
ESMERALDA AND CENTRAL NYE COUNTY-LINCOLN COUNTY-
NORTHEAST CLARK COUNTY-WESTERN CLARK AND SOUTHERN NYE COUNTY-
SHEEP RANGE-SPRING MOUNTAINS-LAS VEGAS VALLEY-
SOUTHERN CLARK COUNTY-
521 AM PST SUN FEB 25 2007 /621 AM MST SUN FEB 25 2007/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST
ARIZONA...CALIFORNIA AND SOUTHERN NEVADA.

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

A STORM SYSTEM NEAR THE PACIFIC NORTHWEST COAST IS EXPECTED TO
BRING STRONG WEST AND SOUTHWEST WINDS TO MUCH OF THE MOJAVE DESERT
AND SOUTHERN GREAT BASIN ON TUESDAY. WIND ADVISORIES MAY BE NEEDED
AS THE EVENT APPROACHES. LESS ACTIVE WEATHER IS EXPECTED FOR LATER
IN THE WEEK.

.SPOTTER INFORMATION STATEMENT...

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

MORGAN