AREA FORECAST DISCUSSION...CORRECTION
NATIONAL WEATHER SERVICE LAS VEGAS NV
300 PM PST TUE MAR 9 2010

CORRECTION TO RESEND THE DISCUSSION

.SYNOPSIS...THE FIRST STORM MOVES OUT OF THE AREA TONIGHT AS THE
SECOND SYSTEM MOVES RAPIDLY IN ON WEDNESDAY. THIS WILL RESULT IN
LOCAL GUSTY WINDS...SCATTERED RAIN AND SNOW SHOWERS OVER MAINLY THE
EASTERN PORTION OF THE SOUTHERN GREAT BASIN AND CONTINUED BELOW
NORMAL TEMPERATURES. DRYING AND WARMING TO TAKE PLACE INTO THE
WEEKEND AS A RIDGE OF HIGH PRESSURE THEN BUILDS OVER THE REGION.

.SHORT TERM...THE STRONG UPPER LOW LOCATED OVER NORTHWEST ARIZONA AS
OF 22Z TUESDAY WILL SHIFT EAST TONIGHT. SOME WRAP AROUND MOISTURE TO
KEEP ISOLATED/SCATTERED SHOWERS MAINLY OVER MOHAVE COUNTY THROUGH
THE EVENING BEFORE ENDING OVERNIGHT. HOWEVER DO NOT EXPECT
ADDITIONAL ACCUMULATIONS SO WILL CANCEL THE WINTER ADVISORY FOR
THIS AREA WITH THIS PACKAGE. THE NEXT PACIFIC STORM IS ALREADY
PUSHING INTO NORTHERN CALIFORNIA AND IS EXPECTED TO MOVE RAPIDLY
ACROSS THE SOUTHERN GREAT BASIN ON WEDNESDAY. ATTM MOISTURE APPEARS
TO BE FAIRLY LIMITED SO EXPECT LESS ACTIVITY WITH THIS SYSTEM THAN
WITH TODAYS STORM. WITH THIS SAID THOUGH...LIGHT SNOW ACCUMULATIONS
CAN STILL BE EXPECTED MAINLY ACROSS THE SOUTHERN NEVADA MOUNTAINS.
SIMILAR TO TODAYS SYSTEM...COLD AIR ASSOCIATED WITH THIS STORM WILL
ALLOW FOR LOW SNOW LEVELS WHILE INSTABILITY WILL LIKELY PRODUCE
ISOLATED THUNDERSTORMS WEDNESDAY AFTERNOON. THIS SYSTEM IS FORECAST
TO SHIFT INTO EASTERN ARIZONA BY 06Z THURSDAY WITH RIDGE THEN
BUILDING OVER THE CWA INTO THURSDAY. STRONG AND GUSTY WINDS
ACROSS THE SAN BERNARDINO COUNTY DESERT TODAY SHOULD DECREASE
SOMEWHAT OVERNIGHT. HOWEVER WITH THE SECOND SYSTEM MOVING THROUGH
THE AREA...EXPECT ANOTHER WINDY DAY ON WEDNESDAY FOR THE WESTERN
DESERTS. ADDITIONAL ENHANCEMENT OF THE THERMAL GRADIENTS/PRESSURE
GRADIENTS MAY ALSO INCREASE NORTH WINDS IN THE OWENS VALLEY AND THE
NORTHWEST PORTION OF THE CWA TO NEAR ADVISORY LEVELS. FOR NOW WILL
ONLY CONTINUE THE WIND ADVISORY FOR THE SAN BERNARDINO DESERTS
THROUGH THIS EVENING AND HAVE NOT EXTENDED INTO WEDNESDAY AS WINDS
SHOULD BE UNDER ADVISORY CRITERIA THROUGHOUT MUCH OF THE NIGHT. WILL
LIKELY NEED TO ISSUED A NEW ADVISORY DURING THE NEXT PACKAGE FOR
WEDNESDAY AFTERNOON AND WILL ALSO BE MONITORING THE NORTHWEST
PORTION OF THE CWA. COLD AIR THAT MOVED OVER THE CWA TODAY WILL
CONTINUE INTO WEDNESDAY WITH THE NEXT SYSTEM...BEFORE WARMING TAKES
PLACE ON THURSDAY AS THE RIDGE BUILDS OVER THE REGION.

.LONG TERM...HIGH PRESSURE ON FRIDAY WILL DAMPEN SOMEWHAT ON
SATURDAY AS A TROUGH OF LOW PRESSURE BRUSHES ACROSS THE NORTHERN
EDGE OF THE FORECAST AREA. MODEL CONSENSUS WITH THIS FEATURE REMAINS
POOR...SO HAVE KEPT THE MIDDLE OF THE ROAD FORECAST IN PLACE...WHICH
RESULTS IN MINIMAL IMPACT TO THE REGION. THERE WILL ONLY BE A SLIGHT
CHANCE OF SHOWERS ACROSS THE HIGHER ELEVATIONS OF LINCOLN...NYE...
ESMERALDA...AND INYO COUNTIES. SUNDAY AND THROUGH THE FIRST HALF OF
NEXT WEEK...RIDGING WILL BUILD IN ACROSS THE REGION AND RESULT IN
MAINLY CLEAR SKIES AND TEMPERATURES WELL ABOVE NORMAL.
&&

.AVIATION...FOR MCCARRAN...WINDS WILL CONTINUE TO BE THE MAIN
CONCERN INTO THE EVENING. THERE IS STILL A VERY DISTINCT DIFFERENCE
IN WIND DIRECTION JUST NORTH OF KLAS...WITH SOUTHWEST WINDS OBSERVED
AT THE TERMINAL AND STRONGER NORTHWESTERLY WINDS OBSERVED
APPROXIMATELY JUST ONE MILE TO THE NORTH. OVER THE NEXT SEVERAL
HOURS...WIND DIRECTION IS EXPECTED TO GRADUALLY SWING AROUND TO THE
NORTHWEST...AS THE RESPONSIBLE AREA OF LOW PRESSURE CONTINUES TO
MOVE EAST OF THE AREA AND THE STRONGER WINDS ALONG THE BACK SIDE OF
THE SYSTEM BEGIN TO BE THE DOMINANT FACTOR. NO MORE PRECIP IS
EXPECTED OUT OF THIS SYSTEM AT KLAS...AND EXPECT CLOUD COVER TO
REALLY THIN OUT TONIGHT AS DRY NORTHERLY FLOW WORKS ACROSS THE
REGION. ONCE WINDS FINALLY TURN NORTHWEST...THEY WILL LIKELY STAY
THERE THROUGH WEDNESDAY...AND BE GUSTY AGAIN TOMORROW AFTERNOON AS
ANOTHER SHORTWAVE BRUSHES JUST TO THE NORTH.

FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...SCATTERED SHOWERS WILL CONTINUE THIS EVENING ACROSS
MOHAVE COUNTY AS A COLD FRONT CONTINUES TO MOVE ACROSS THE REGION.
GUSTY SURFACE WINDS WILL SHIFT TO THE NORTHWEST BEHIND THE
FRONT...AND REMAIN THERE THROUGH WEDNESDAY...AS ANOTHER SHORTWAVE
BRUSHING THE REGION REINFORCES NORTHERLY WINDS WEDNESDAY AFTERNOON.
&&

&&

.VEF WATCHES/WARNINGS/ADVISORIES...
NV...NONE.
AZ...NONE.
CA...WIND ADVISORY UNTIL 7 PM PST THIS EVENING FOR CAZ523>525.
&&