Expires:No;;956936
FPUS55 KVEF 252218
ZFPVEF
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
317 PM PDT SUN MAY 25 2008
.SYNOPSIS...A LOW PRESSURE SYSTEM OVER CENTRAL CALIFORNIA WILL MOVE 
ACROSS NEVADA ON MEMORIAL DAY AND THEN EAST OF THE AREA BY TUESDAY. 
THIS WILL CONTINUE TO BRING COOL AND SHOWERY WEATHER TO THE AREA 
TONIGHT AND MEMORIAL DAY...ESPECIALLY ACROSS THE NORTHERN MOUNTAINS. 
DRIER CONDITIONS WILL THEN BE SEEN ON TUESDAY. TEMPERATURES WILL 
REMAIN WELL BELOW NORMAL ON MEMORIAL DAY AND THEN WARM TO NEAR 
NORMAL BY WEDNESDAY.
&&
.SHORT TERM...UPPER LOW OVER CENTRAL CALIFORNIA HAS PRODUCED LIGHT 
SHOWERS ACROSS MUCH OF THE NORTHERN PORTION OF THE CWA DURING THE 
DAY. VORT MAX/EDDIE AS DEPICTED BY BOTH THE NAM/GFS AND SEEN ON 
WATER VAPOR MOVING ACROSS SOUTHERN NEVADA ATTM AND HAS ENHANCED 
CLOUDS/LIGHT SHOWERS ACROSS SOUTHERN CLARK COUNTY AS OF 3 PM PDT. 
EXPECT THIS MAX TO SHIFT NORTHEAST BY BEGINNING OF TONIGHT 
PERIOD...THUS WILL NOT MENTION IN ZONES...ALTHOUGH A LIGHT SHOWER 
MAY BE SEEN IN THE KLAS VALLEY THROUGH ABOUT 6 PM. UPPER LOW TO 
SHIFT OVER CENTRAL NEVADA ON MEMORIAL DAY AND THEN KICK NORTHEAST  
INTO WESTERN WYOMING BY TUESDAY MORNING. AS LOW SHIFTS ACROSS THE 
AREA...CONTINUED INSTABILITY/BEST DYNAMICS REMAIN OVER THE NORTHERN 
PORTION OF THE CWA...BUT WEAK DYNAMICS ALSO OVER THE SOUTHERN 
NEVADA MOUNTAINS AND ACROSS NORTHWEST ARIZONA FOR CONTINUED MENTION 
OF SLIGHT CHANCE POPS FOR THE AFTERNOON. HOWEVER DRYING TO BE TAKING 
PLACE DURING THE DAY FROM WEST TO EAST WITH FURTHER DRYING EXPECTED 
ON TUESDAY AS LOW MOVES OUT OF THE AREA. CONTINUED CLOUDS/SHOWERS 
HAVE CAPPED THE FULL POTENTIAL OF HEATING...ESPECIALLY ACROSS THE 
SOUTH TODAY WITH MOST READINGS SLIGHTLY COOLER THAN MORNING 
FORECAST. WITH DRYING EXPECTED ON MONDAY AND THEN AGAIN ON TUESDAY 
ALONG WITH RAISING HEIGHTS/THICKNESS...LOOK FOR A WARMING TREND 
THROUGH THE SHORT TERM. TEMPS WILL CONTINUE WELL BELOW NORMAL ON 
MONDAY AS TROUGH SHIFTS OVER THE AREA...THEN BUMP UP AROUND 10 
DEGREES FOR TUESDAY AND THEN NEAR NORMAL EARLY IN THE LONG TERM.
.LONG TERM...THE EXTENDED STILL LOOKS TO BE HIGH AND DRY FOR THE 
MOST PART AS DRY SOUTHWEST FLOW PERSISTS ACROSS THE FORECAST AREA. A 
SHORTWAVE TROUGH WILL PASS NORTH OF THE AREA ON THURSDAY...BUT WITH 
MOST OF THE ASSOCIATED ENERGY WELL TO THE NORTH...MAIN IMPACT WILL 
BE BREEZY CONDITIONS AT MOST LOCATIONS AS INCREASED SOUTHWESTERLY 
FLOW ALOFT MIXES DOWN TO THE SURFACE. CONDITIONS DO NOT LOOK TOO 
FAVORABLE FOR DOWNSLOPE WINDS ALONG THE SOUTHERN SIERRA...WITH TOO 
MUCH POSITIVE WIND SHEAR...BUT CANT COMPLETELY RULE OUT THE 
POSSIBILITY AS THE MAIN TROUGH AXIS PASSES OVER. BROAD RIDGING WILL 
BE IN PLACE OVER THE WEEKEND...BEFORE THE NEXT SHORTWAVE RESULTS IN 
ANOTHER ROUND OF INCREASED SOUTHWEST WINDS BY LATE SUNDAY...SO 
TEMPERATURES SHOULD BE AT OR SLIGHTLY ABOVE NORMAL.
&&
.AVIATION...FOR MCCARRAN...INCREASED STABILITY ALOFT SHOULD KEEP THE 
EVENING PRIMARILY DRY...WITH ONLY A VERY SLIGHT CHANCE OF A STRAY 
SHOWER OR TWO OCCURRING IN THE VICINITY OF KLAS. SURFACE WINDS WILL 
REMAIN OUT OF THE SOUTHEAST UNDER 10 KTS...THEN BECOME LIGHT AND 
VARIABLE AFTER SUNSET. ANY STEADY DIRECTION WOULD BE OUT OF THE 
SOUTHWEST IF A DRAINAGE WIND SETS UP. TOMORROW...CHANCES FOR PRECIP 
WILL BE LIMITED TO AREAS NORTH OF MCCARRAN...SO ONLY THE BEATTY AND 
MORMON CORRIDORS COULD BE AFFECTED. ALL IN ALL...NO SIGNIFICANT 
WEATHER IS EXPECTED. CLOUD COVERAGE WILL PERSIST BETWEEN 7-10K 
FT...BUT SHOULD STAY PREDOMINANTLY SCT. 
FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST 
CALIFORNIA...NO SIGNIFICANT WEATHER IS EXPECTED OVERNIGHT OR 
MEMORIAL DAY...WITH ONLY A SLIGHT CHANCE OF PRECIPITATION ACROSS 
AREAS NORTH OF LAS VEGAS. THE ATMOSPHERE SHOULD REMAIN RELATIVELY 
STABLE...SO EXPECTING ACTIVITY TO BE CAPPED OFF BEFORE FORMING 
THUNDERSTORMS. HOWEVER...CANT COMPLETELY RULE OUT A FEW LIGHTNING 
STRIKES TOMORROW AFTERNOON WHEN WE WOULD BE MOST UNSTABLE... 
ESPECIALLY NORTH OF KBJN.
&&
.VEF WATCHES/WARNINGS/ADVISORIES...
NV...NONE.
AZ...NONE.
CA...NONE.
&&
$$
JENSEN/KENNEDY
HTTP://WEATHER.GOV/LASVEGAS