359  
FXUS65 KVEF 232236  
AFDVEF  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE LAS VEGAS NV  
340 PM PDT THU MAR 23 2023  
   
SYNOPSIS  
SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS WILL  
REMAIN POSSIBLE THROUGH THIS EVENING, MAINLY ACROSS SOUTHERN  
NEVADA AND NORTHWEST ARIZONA. OTHERWISE, DRY AND COOL CONDITIONS  
WILL PREVAIL THROUGH THE WEEKEND BEFORE THE NEXT WEATHER SYSTEM  
MOVES IN NEXT WEEK. ANOTHER ROUND OF SIERRA SNOWFALL AND UNSETTLED  
CONDITIONS AREA WIDE CAN BE EXPECTED BY TUESDAY AND WEDNESDAY.  
 
 
   
SHORT TERM  
THROUGH THIS WEEKEND.  
 
SHOWER ACTIVITY IS ONGOING ACROSS NORTHERN MOHAVE COUNTY THANKS TO  
STEEP LAPSE RATES AND MODEST UPSLOPE FLOW THAT HAS BEEN PRESENT  
SINCE THIS MORNING. WE'RE ALSO BEGINNING TO SEE SHOWER  
DEVELOPMENT INCREASE IN SOUTHERN NEVADA AND SOUTHERN MOHAVE COUNTY  
NEAR THE HUALAPAI MOUNTAINS. EXPECT AS DESTABILIZATION CONTINUES  
WITH AFTERNOON HEATING, SCATTERED SHOWERS AND EVEN A FEW LIGHTNING  
STRIKES WILL BE POSSIBLE ACROSS THE HIGHER TERRAIN OF SOUTHERN  
NEVADA AND NORTHWEST ARIZONA, WITH A FEW STRAY STORMS DRIFTING  
INTO THE LOWER DESERTS DURING THE EVENING.  
 
ACTIVITY WILL GRADUALLY WANE OVERNIGHT WITH DRIER CONDITIONS ON  
TAP FOR FRIDAY AS SLIGHTLY MORE STABLE AIR MOVES IN. NORTHWESTERLY  
FLOW ALOFT WILL HOLD THROUGH THE WEEKEND KEEPING TEMPERATURES ON  
THE COOL SIDE AS A SERIES OF SHORTWAVES MOVE ACROSS THE  
INTERMOUNTAIN REGION AND NORTHERN GREAT BASIN. AFTERNOON HIGHS  
WILL REMAIN 10-15 DEGREES BELOW NORMAL, DESPITE MOSTLY SUNNY  
CONDITIONS DURING THE DAYTIME HOURS.  
   
LONG TERM  
NEXT WEEK.  
 
AFTER A SHORT BREAK OVER THE WEEKEND, THE NEXT WEATHER SYSTEM WILL  
BEGIN TO TAKE SHAPE OFF THE WEST COAST BY MONDAY BEFORE COMING  
ASHORE ACROSS NORTHERN CALIFORNIA BY TUESDAY. INCREASING WINDS  
WILL THE FIRST IMPACT ON MONDAY FOLLOWED BY INCREASING SHOWER  
ACTIVITY OVER THE SIERRA MONDAY NIGHT. PRECIPITATION CHANCES WILL  
SPREAD INTO THE OWENS VALLEY AND SOUTHERN GREAT BASIN TUESDAY  
BEFORE THE TROUGH AXIS SWEEPS ACROSS THE GREAT BASIN WEDNESDAY  
WHEN CHANCES FOR SHOWERS WILL PEAK AREAWIDE. OVERALL, THIS SYSTEM  
BEARS SOME SIMILARITY TO THIS PAST TUESDAY'S STORM SYSTEM, THOUGH  
SLIGHTLY FURTHER NORTH AND WITH A WEAKER MOISTURE TAP.  
NONETHELESS, WE EXPECT ANOTHER ROUND OF HEAVY SNOW IN THE SIERRA  
AND SOME ADDITIONAL SNOW ACCUMULATIONS IN THE SPRING MOUNTAINS AND  
HIGHER TERRAIN OF THE SOUTHERN GREAT BASIN.  
 
BEYOND MIDWEEK, OUR PRIMARY TROUGH WILL DEPART TO OUR EAST WITH  
DRIER CONDITIONS GRADUALLY BUILDING BACK IN. HOWEVER, WE'LL  
REMAIN UNDER THE INFLUENCE OF BROAD TROUGHING ACROSS THE WEST.  
THIS WILL ENSURE TEMPERATURES REMAIN BELOW NORMAL TO FINISH OUT  
THE MONTH WITH THE POSSIBILITY OF SOME ADDITIONAL LIGHT SHOWER  
ACTIVITY.  
 
 
   
AVIATION...FOR HARRY REID  
SOUTHWESTERLY TO WESTERLY WINDS  
ARE ANTICIPATED THIS AFTERNOON AND OVERNIGHT. SPEEDS MAY REACH OVER  
10 KNOTS IN THE LATER IN THE AFTERNOON AND EVENING. THERE IS A  
POSSIBILITY FOR RAIN SHOWERS THIS AFTERNOON IN THE LAS VEGAS AREA,  
BUT THEY SHOULD REMAIN ISOLATED AND MOSTLY CONFINED TO HIGHER  
TERRAIN. INCLUDED VCSH IN THE TAF. OTHERWISE, FEW TO SCT MID LEVEL  
CLOUDS WILL REMAIN IN THE AREA. TOMORROW MORNING, WINDS SHIFT TO THE  
NORTHWEST AND INCREASE TO OVER 10 KNOTS.  
 
FOR THE REST OF SOUTHERN NEVADA, NORTHWEST ARIZONA AND SOUTHEAST  
CALIFORNIA...RAIN SHOWERS AND THUNDERSTORMS WILL MOVE THROUGH THE  
FORECAST AREA LATER THIS AFTERNOON AND EVENING. THESE STORMS SHOULD  
REMAIN ISOLATED IN NATURE AND MAINLY BE CONFINED TO HIGHER TERRAIN.  
WINDS WILL BEGIN TO INCREASE OUT OF THE WEST TO SOUTHWEST THIS  
AFTERNOON, REMAINING OVERNIGHT. BY TOMORROW MORNING, WINDS SHIFT TO  
THE NORTHWEST IN THE LAS VEGAS VALLEY AND BECOME VARIABLE IN THE  
COLORADO RIVER VALLEY. FOR THE WESTERN MOJAVE DESERT INCLUDING KDAG,  
GUSTY WESTERLY WINDS PERSIST THROUGH FRIDAY MORNING. FEW TO SCT MID  
LEVEL CLOUDS REMAIN THROUGHOUT THE FORECAST PERIOD.  
 
 
   
SPOTTER INFORMATION STATEMENT  
SPOTTERS ARE ENCOURAGED TO REPORT  
ANY SIGNIFICANT WEATHER OR IMPACTS ACCORDING TO STANDARD OPERATING  
PROCEDURES.  
 
 
 
 
DISCUSSION...OUTLER  
AVIATION...MELTZER  
 
FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:  
HTTPS://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER  
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