517  
FXUS65 KVEF 191913  
AFDVEF  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE LAS VEGAS NV  
1213 PM PDT SUN MAY 19 2024  
   
SYNOPSIS
 
GUSTY SOUTHWESTERLY WINDS CONTINUE THROUGH MONDAY, WITH  
THE STRONGEST WINDS IN SOUTHEASTERN CALIFORNIA. ISOLATED SHOWERS AND  
THUNDERSTORMS MAY DEVELOP EACH AFTERNOON THROUGH MONDAY IN LINCOLN  
COUNTY. TEMPERATURES WILL DECREASE AS AN UPPER LEVEL TROUGH MOVES  
INTO THE AREA LEADING TO NEAR NORMAL TEMPERATURES BY MONDAY.  
 

 
   
SHORT TERM
 
THROUGH TUESDAY.  
 
A BROAD UPPER LEVEL TROUGH WILL BE IN PLACE OVER THE WESTERN UNITED  
STATES OVER THE NEXT FEW DAYS. THE MAIN IMPACT FROM THIS PATTERN  
WILL BE INCREASED SOUTHWESTERLY WINDS TODAY AND TOMORROW DUE TO THE  
DEVELOPMENT OF A LOW LEVEL JET AND TIGHTENING SURFACE PRESSURE  
GRADIENTS. PEAK GUSTS SHOULD BE IN THE 20 TO 30 MPH RANGE FOR MOST  
LOCATIONS. HOWEVER, GUSTS IN EXCESS OF 40 MPH MAY DEVELOP FOR A  
SHORT TIME ALONG HIGH TERRAIN THIS AFTERNOON AND TOMORROW  
AFTERNOON, ESPECIALLY IN SOUTHEASTERN CALIFORNIA. SHORT PERIODS  
OF DOWNSLOPE WINDS WITH GUSTS OVER 40 MPH ARE ALSO IN THE REALM OF  
POSSIBILITY EAST OF THE SPRING MOUNTAINS AND SIERRA. BECAUSE OF  
THE LIMITED SPATIAL AND TEMPORAL EXTENT OF ADVISORY-LEVEL WINDS  
AND THEIR OVERALL BORDERLINE NATURE, WILL NOT BE ISSUING ANY WIND  
RELATED HEADLINES WITH THIS FORECAST PACKAGE. THAT BEING SAID,  
REMAIN CAUTIOUS IF DRIVING A LIGHTWEIGHT OR HIGH PROFILE VEHICLE  
ON AREA HIGHWAYS, INCLUDING INTERSTATE 15 AND INTERSTATE 40. WINDS  
SHOULD BE WEAKER ON TUESDAY AS THE PRESSURE GRADIENT DECREASES.  
 
LINGERING MOISTURE AND INSTABILITY ASSOCIATED WITH THE TROUGH ALSO  
BRINGS CONTINUED CHANCES FOR ISOLATED SHOWERS AND THUNDERSTORMS THIS  
AFTERNOON AND TOMORROW AFTERNOON, MAINLY OVER LINCOLN COUNTY OR HIGH  
TERRAIN IN CLARK COUNTY. RAINFALL TOTALS FROM ANY STORMS THAT FORM  
SHOULD BE LIGHT. ATMOSPHERIC MOISTURE DECREASES TOMORROW NIGHT AND  
PRECIPITATION IS NOT EXPECTED ON TUESDAY. TEMPERATURES CONTINUE  
THEIR DOWNWARD TREND WITH HIGHS NEAR TO BELOW NORMAL ON TOMORROW AND  
TUESDAY.  
   
LONG TERM
 
WEDNESDAY THROUGH SATURDAY  
 
ANOTHER SYSTEM DIGGING SOUTH DOWN THE BRITISH COLUMBIA COAST WILL  
REESTABLISH THE LONGWAVE TROUGH ACROSS THE WEST HEADING INTO THE  
MEMORIAL DAY WEEKEND. BOTH THE GEFS AND EPS MAINTAIN H5 HEIGHTS  
BELOW NORMAL THROUGH AT LEAST SATURDAY. TEMPERATURES WILL BE AT OR  
BELOW NORMAL DURING THE PERIOD. SHOULD BE WINDY AT TIMES WITH  
GUSTS 30 TO 40 MPH AT TIMES ACROSS THE WESTERN MOJAVE DESERT OF  
SAN BERNARDINO COUNTY AND THE SOUTHERN SIERRA. ELSEWHERE, IT WILL  
BE BREEZY WITH GUSTS IN THE 20 TO 30 MPH RANGE. FOR THE TIME  
BEING, ANY PRECIPITATION CHANCES STAY ACROSS CENTRAL NEVADA BUT  
MAY SAG AS FAR SOUTH AS THE PANHANDLE OF LINCOLN COUNTY SATURDAY.  
 

 
   
AVIATION...FOR HARRY REID
 
AFTER A BRIEF PERIOD OF LIGHT  
SOUTHEAST WINDS IN THE LATE MORNING AND EARLY AFTERNOON, SOUTH TO  
SOUTHWEST WINDS WITH GUSTS 20 TO 25 KNOTS ARE EXPECTED THIS  
AFTERNOON. GUSTS SHOULD CONTINUE WELL INTO THE NIGHT, GRADUALLY  
SUBSIDING TOWARD EARLY MONDAY MORNING. GUSTY SOUTHWEST WINDS SHOULD  
KICK BACK UP AGAIN AROUND MIDDAY MONDAY. TURBULENCE CAN BE EXPECTED  
AS THE STRONG WINDS PASS OVER THE MOUNTAINOUS TERRAIN. NO  
OPERATIONALLY SIGNIFICANT CLOUDS OR WEATHER EXPECTED.  
 
FOR THE REST OF SOUTHERN NEVADA, NORTHWEST ARIZONA AND SOUTHEAST  
CALIFORNIA...WINDS WILL BE GENERALLY WEST TO SOUTHWEST OVER MOST OF  
THE REGION THIS AFTERNOON, WITH THE STRONGEST GUSTS OF 30 TO 35  
KNOTS IN THE BARSTOW AREA. THERE COULD ALSO BE BRIEF DOWNSLOPE WINDS  
AND ROTORS ON THE EAST SIDE OF MOUNTAIN RANGES SUCH AS THE SIERRA  
NEVADA AND THE SPRING MOUNTAINS ON THE WEST SIDE OF LAS VEGAS. GUSTS  
WILL END AROUND SUNSET EXCEPT IN THE BARSTOW AREA. ON MONDAY, GUSTY  
WEST TO SOUTHWEST WINDS WILL PICK UP AGAIN OVER MOST OF THE MOJAVE  
DESERT, WHILE THE SOUTHERN GREAT BASIN SEES NORTHWEST TO NORTH  
WINDS. THE STRONGEST AFTERNOON GUSTS OF 30 TO 35 KNOTS SHOULD OCCUR  
IN A SWATH FROM BARSTOW THROUGH SEARCHLIGHT TO COLORADO CITY. THERE  
WILL BE A VERY SMALL CHANCE FOR SHOWERS AND THUNDERSTORMS THIS  
AFTERNOON IN AREAS FROM THE SIERRA CREST EASTWARD TO THE PANHANDLE  
OF LINCOLN COUNTY, BUT MUCH LESS COVERAGE IS EXPECTED TODAY THAN  
WHAT OCCURRED SATURDAY AFTERNOON.  
 

 
   
SPOTTER INFORMATION STATEMENT
 
SPOTTERS ARE ENCOURAGED TO REPORT  
ANY SIGNIFICANT WEATHER OR IMPACTS ACCORDING TO STANDARD OPERATING  
PROCEDURES.  
 

 
 

 
 
SHORT TERM...MELTZER  
LONG TERM...PIERCE  
AVIATION...MORGAN  
 
FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:  
HTTPS://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER  
 
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