520  
FXUS65 KVEF 260451  
AFDVEF  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE LAS VEGAS NV  
950 PM PDT MON MAR 25 2019  
   
SYNOPSIS
 
MILD AND DRY CONDITIONS ARE EXPECTED ACROSS THE REGION  
THROUGH TUESDAY, BEFORE INCREASING SHOWER CHANCES IMPACT THE  
SIERRA AND SOUTHERN GREAT BASIN ON WEDNESDAY. WIDESPREAD GUSTY  
SOUTHWESTERLY WINDS CAN BE EXPECTED AS WELL ALONG WITH COOLING  
TEMPERATURES FOR THE LATER HALF OF THE WEEK.  

 
   
UPDATE
 
THE 00Z MODEL GUIDANCE AND RECENT OBSERVATIONS SUPPORT THE  
GOING FORECAST DETAILED IN THE PREVIOUS DISCUSSION. HIGHS IN THE 80S  
ACROSS THE DESERTS FROM CLARK COUNTY SOUTHWARD ARE IN STORE TUESDAY.  
SOME MODEL TEMP FORECASTS LIMIT TEMPS TO THE UPPER 70S FOR LAS VEGAS  
TUESDAY. INCREASING HIGH CLOUDS MAY FILTER SUNSHINE A BIT TUESDAY  
AFTERNOON, BUT SOUTH-SOUTHWEST WINDS STIRRING 10-15 MPH SHOULD MIX  
THE BOUNDARY LAYER AND PROVIDE A LITTLE TEMPERATURE BOOST. WINDS  
WILL BECOME STRONGER WEDNESDAY AND THURSDAY AS A BROAD PACIFIC  
TROUGH MOVES INLAND. NO IMMEDIATE CHANGES NEEDED.  

 
   
PREV DISCUSSION
 
 
342 PM PDT MON MAR 25 2019  
   
DISCUSSION
 
TODAY THROUGH SUNDAY.  
 
THE RIDGE BUILDING INTO THE INTERIOR WEST WILL CONTINUE TO BE  
PUSHED EASTWARD BY A BROAD CLOSED LOW OFF THE PACIFIC NW COAST. AS  
THE LOW APPROACHES THE NORCAL/OREGON COAST TOMORROW, SOUTHWEST  
FLOW WILL STRENGTHEN ALLOWING FOR A BREEZY AFTERNOON ACROSS THE  
REGION. ALREADY WARM TEMPERATURES PLUS ADDED MIXING FROM BREEZY  
WINDS WILL ALLOW FOR TUESDAYS TEMPERATURES TO REACH THE LOW 80S IN  
LAS VEGAS - THE WARMEST THEY'VE BEEN THIS YEAR!  
 
BY WEDNESDAY, THE LOW WILL BEGIN TO PUSH INLAND DRAGGING A COLD  
FRONT ACROSS THE GREAT BASIN, RESULTING IN A TIGHT PRESSURE  
GRADIENT ACROSS THE REGION. THIS WILL BRING WIDESPREAD GUSTY  
SOUTHWEST WINDS WEDNESDAY AFTERNOON WITH THE STRONGEST WINDS  
REMAINING NORTH OF THE I-15 CORRIDOR. WINDS LOOK MARGINAL FOR A  
WIND ADVISORY ON WEDNESDAY WITH MOST AREAS REACHING BORDERLINE  
CRITERIA (22-26 KNOTS SUSTAINED). DOWNSLOPE POTENTIAL IS NOT  
FAVORED WITH THIS SOUTHWEST WIND REGIME BUT SOME GUSTS OF 35-45  
KTS IS POSSIBLE DOWN TO MID-SLOPES IN THE LEE OF THE SIERRA AND  
SPRING MOUNTAINS. BESIDES WINDS, MOISTURE IS LIMITED ACROSS OUR  
REGION WITH ONLY SOME SCATTERED SHOWERS ACROSS OUR NORTHERN CWA  
(NORTHERN INYO, ESMERALDA, NYE, AND LINCOLN COUNTIES) WEDNESDAY.  
THROUGHOUT THE DAY THURSDAY, THE SHORTWAVE/COLD FRONT WILL PUSH  
THROUGH THE REGION BRINGING BREEZY NORTH WINDS AND DROP  
TEMPERATURES 5-8 DEGREES FROM WEDNESDAYS. THE SHORTWAVE ENERGY  
WILL LINGER THROUGH FRIDAY KEEPING BREEZY NORTH WINDS ACROSS THE  
REGION. BY SATURDAY, THE SHORTWAVE WILL EVENTUALLY MOVE EASTWARD  
WITH RIDGING BEGINNING TO BUILD ACROSS THE REGION BUT MODELS ARE  
STILL INCONSISTENT ON THE EXACT EVOLUTION.
 
   
AVIATION...FOR MCCARRAN
 
LIGHT WINDS FAVORING DIURNAL TRENDS ARE  
EXPECTED THROUGH THE TAF PERIOD WITH SCT HIGH CLOUDS AOA 20K FEET.  
SOUTHWEST WINDS GUSTING TO AROUND 25 KTS ACROSS THE AIRFIELD TUESDAY  
AFTERNOON WITH SOUTHWEST GUSTS AROUND 30 KTS EXPECTED ON WEDNESDAY.  
 
FOR THE REST OF SOUTHERN NEVADA, NORTHWEST ARIZONA AND SOUTHEAST  
CALIFORNIA...LIGHT WINDS FAVORING DIURNAL TRENDS ARE EXPECTED FOR  
MOST OF THE REGIONAL TAF SITES ALONG WITH MOSTLY CLEAR SKIES THROUGH  
TUESDAY MORNING. SOUTH WINDS IN THE OWENS VALLEY NEAR KBIH WILL  
CONTINUE TO GUST TO AROUND 25 KTS THIS AFTERNOON BEFORE DECREASING  
THIS EVENING. MILD TURBULENCE CAN BE EXPECTED NEAR THE SIERRA AS  
WELL. GUSTY SOUTHWEST WINDS AROUND 25 KTS AT KDAG, KVGT, KLAS AND  
KHND TUESDAY AFTERNOON WITH SOUTHWEST GUSTS 30-40 KTS WEDNESDAY  
AFTERNOON.
 
   
SPOTTER INFORMATION STATEMENT
 
SPOTTERS ARE ENCOURAGED TO REPORT  
ANY SIGNIFICANT WEATHER OR IMPACTS ACCORDING TO STANDARD OPERATING  
PROCEDURES.  

 
 

 
 
DISCUSSION...KRYSTON  
AVIATION...SALMEN  
 
FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:  
 
HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER  
 
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