622  
FXUS65 KVEF 122136  
AFDVEF  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE LAS VEGAS NV  
236 PM PDT MON APR 12 2021  
   
SYNOPSIS
 
A CHANGE IN THE WEATHER OCCURS TUESDAY AS A COOLING  
TREND WILL BE SPARKED BY A CLOSED LOW FORMING OVER THE GREAT  
BASIN, WHICH ALSO PROMISES A RETURN OF GUSTY WINDS TUESDAY INTO  
WEDNESDAY BRINGING CRITICAL FIRE WEATHER CONDITIONS TO MUCH OF THE  
REGION.  
 

 
   
DISCUSSION...THROUGH SUNDAY
 
 
AN ELONGATED TROUGH OF LOW PRESSURE WITH TWO STRONG LOW PRESSURE  
CENTERS IS DEVELOPING ACROSS THE NORTHERN TIER OF STATES. THE  
WESTERNMOST LOW IS BECOMING BETTER ORGANIZED AND MOVING SOUTHWARD  
INTO THE NORTHERN GREAT BASIN TONIGHT INTO TOMORROW MORNING. THIS  
SYSTEM WILL BRING INCREASED WIND TO THE AREA, WITH A WIND ADVISORY  
ISSUED FOR MUCH OF THE AREA IN EFFECT LATE TUESDAY MORNING  
THROUGH THE EVENING HOURS. WIND WILL BE STRONGEST IN AND LEE OF  
THE SIERRA IN INYO COUNTY. A HIGH WIND WARNING HAS BEEN ISSUED FOR  
THE THREAT OF DAMAGING WIND IN THE SIERRA AND SOUTHERN OWENS  
VALLEY. ALONG WITH THE WIND WILL BE DRY CONDITIONS, PROMPTING A  
RED FLAG WARNING FOR MUCH OF THE AREA. THE TROUGH WILL LINGER  
AROUND THE WEST FOR A FEW DAYS, KEEPING US WITH NEAR NORMAL  
TEMPERATURES THOUGH THURSDAY WITH OCCASIONAL BREEZY CONDITIONS. A  
SLOW WARMING TREND BEGINS FRIDAY AND CONTINUES THROUGH THE  
WEEKEND.  
 

 
   
FIRE WEATHER
 
 
A LOW PRESSURE SYSTEM WILL MOVE ACROSS THE GREAT  
BASIN TUESDAY, BRINGING STRONG WEST TO SOUTHWEST WINDS ACROSS THE  
REGION. THESE WINDS COUPLED WITH VERY DRY CONDITIONS HAVE PROMPTED  
RED FLAG WARNINGS ACROSS MUCH OF THE AREA. WIND WILL DECREASE A  
BIT TUESDAY NIGHT, BUT CRITICAL CONDITIONS WILL RETURN FOR  
WEDNESDAY IN AREAS OF LINGERING WIND, PARTICULARLY THE HIGHER  
ELEVATIONS OF NORTHWEST AZ.  
 

 
   
AVIATION...FOR MCCARRAN
 
 
WINDS WILL REMAIN BELOW 10 KNOTS AND  
FOLLOW NEAR TO DIURNAL TRENDS THROUGH EARLY TUESDAY MORNING. THERE  
IS A CHANCE THAT WEST TO SOUTHWEST WINDS COULD PUSH IN EARLIER,  
CLOSER TO 00Z THIS EVENING AT 8-10 KNOTS BUT CHANCES ARE LOOKING  
SLIM. OTHERWISE, SOUTHWEST WINDS WILL INCREASE TUESDAY MORNING,  
PEAKING DURING THE MID-AFTERNOON AND EVENING AT 20-30 KNOTS GUSTING  
30-40 KNOTS.  
 
FOR THE REST OF SOUTHERN NEVADA, NORTHWEST ARIZONA AND SOUTHEAST  
CALIFORNIA...  
 
MOST AREAS WILL SEE LIGHT, DIURNAL WINDS THROUGH  
TUESDAY MORNING. A FEW SPOTS COULD SEE WEST WINDS BETWEEN 10-15  
KNOTS THIS EVENING INCLUDING KBIH, KDAG, AND KHND. WEST TO SOUTHWEST  
WINDS WILL INCREASE TUESDAY MORNING, PEAKING MID-TUESDAY AFTERNOON  
THROUGH THE EVENING HOURS. SPEEDS WILL PEAK AT 20-30 KNOTS GUSTING  
30-45 KNOTS WITH LOCALLY HIGHER WINDS POSSIBLE ACROSS THE WESTERN  
MOJAVE DESERT AND SIERRA/OWENS VALLEY.  
 

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

 
 
DISCUSSION...BERC  
AVIATION...GUILLET  
 
FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:  
HTTPS://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER  
 
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