400  
FXUS65 KVEF 142143  
AFDVEF  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE LAS VEGAS NV  
238 PM PDT TUE AUG 14 2018  
   
SYNOPSIS
 
ISOLATED THUNDERSTORMS WILL CONTINUE THIS EVENING OVER  
THE SOUTHERN SIERRA, AS WELL AS SOUTHERN NEVADA AND NORTHWEST  
ARIZONA. STORM COVERAGE WILL RAMP UP ACROSS MOHAVE COUNTY WEDNESDAY  
AND POSSIBLY SPREAD FARTHER NORTH AND WEST THURSDAY. TEMPERATURES  
WILL REMAIN A FEW DEGREES ABOVE NORMAL TODAY, THEN START TO COME  
DOWN AS THUNDERSTORM CHANCES INCREASE. DECREASING THUNDERSTORM  
CHANCES AND INCREASING TEMPERATURES WILL RETURN FRIDAY INTO THE  
WEEKEND.  

 
   
SHORT TERM
 
THROUGH THURSDAY NIGHT.  
 
MOST INTENSE LOOKING STORMS BASED OFF RADAR HAVE BEEN ACROSS MOHAVE  
COUNTY TODAY. WEST OF THE COLORADO RIVER IN CLARK COUNTY STORMS  
HAVING A MORE DIFFICULT TIME MAINTAINING THEMSELVES AS CAPE VALUES  
QUICKLY TAPER OFF MOVING FROM THE COLORADO RIVER VALLEY WEST TOWARD  
PAHRUMP. AS MENTIONED IN THE MORNING UPDATE MOST ORGANIZED AREA OF  
CONVECTION IS OCCURRING OVER CENTRAL NEVADA ASSOCIATED WITH MID-  
LEVEL TROUGH.  
 
MOST OF THE CONVECTION WILL DISSIPATE THIS EVENING. THE ONLY  
EXCEPTION WOULD BE NORTHERN LINCOLN COUNTY AND SOUTHERN MOHAVE  
COUNTY AND FAR SOUTHEAST SAN BERNARDINO COUNTY WHERE SOME STORMS  
WILL CONTINUE WELL PAST MIDNIGHT.  
 
NEXT FEATURE TO WATCH IS AN INVERTED TROUGH OVER SONORA THAT IS  
PROGGED TO LIFT NORTHWARD ACROSS THE AREA BETWEEN WEDNESDAY  
AFTERNOON AND THURSDAY. PRECIPITABLE WATER VALUES OF AN INCH OR LESS  
TODAY WILL SURGE TO BETWEEN 1-1.5" ACROSS MOHAVE, CLARK AND SAN  
BERNARDINO COUNTIES. JUST HOW ACTIVE THE REGION GETS WILL DEPEND ON  
HOW MUCH CLOUDINESS IS GOING TO ACCOMPANY THE UPPER LEVEL  
DISTURBANCE.  
   
LONG TERM
 
FRIDAY THROUGH TUESDAY.  
 
ON FRIDAY, A SHORTWAVE TROUGH WILL PROGRESS EASTWARD ACROSS THE  
GREAT BASIN AS THE RIDGE BUILDS BACK WESTWARD OVER THE SOUTHWEST  
U.S. WHICH WILL PROVIDE SOME SUPPRESSION FOR STORMS. HOWEVER, WITH  
MOISTURE AND INSTABILITY STILL IN PLACE, STORMS WILL CONTINUE TO BE  
A THREAT ON FRIDAY; PRIMARILY OVER MOHAVE COUNTY AND THE HIGHER  
ELEVATIONS OF CLARK COUNTY. THE DOWNWARD TREND IN STORM ACTIVITY  
WILL CONTINUE OVER THE WEEKEND AS THE RIDGE STRENGTHENS OVER THE  
REGION. TEMPS WILL BOTTOM OUT A FEW DEGREES BELOW NORMAL ON THURSDAY  
BUT THIS COOL DOWN WILL BE BRIEF AS HIGH PRESSURE FACILITATES A  
WARMING TREND FRIDAY INTO THE WEEKEND.  

 
   
AVIATION...FOR MCCARRAN
 
SCATTERED THUNDERSTORMS HAVE STARTED TO  
DEVELOP SOUTH OF THE AIR SPACE, AS WELL AS IN THE HIGHER TERRAIN TO  
THE NORTH AND WEST. EXPECT THE THUNDERSTORM ACTIVITY TO CONTINUE  
THROUGH EVENING BEFORE DIMINISHING OVERNIGHT, WITH LIGHTNING AND  
GUSTY WINDS POTENTIALLY AFFECTING THE AREA. AFTER 03Z, STORMS SHOULD  
COME TO AN END AND DIURNAL WINDS ARE EXPECTED OVERNIGHT. ON  
THURSDAY, LIGHT AND VARIABLE WINDS WILL BECOME SOUTH BY LATE  
MORNING. THERE IS A BETTER CHANCE FOR MORE WIDESPREAD AND/OR  
STRONGER STORMS THURSDAY AFTERNOON, WITH GUSTY WIND, HEAVY RAIN, AND  
SMALL HAIL POSSIBLE.  
 
FOR THE REST OF SOUTHERN NEVADA, NORTHWEST ARIZONA AND SOUTHEAST  
CALIFORNIA...THUNDERSTORM CHANCES THROUGH THE EVENING WILL BE OVER  
THE MOUNTAINS OF ESMERALDA, NORTHERN INYO, NORTHEAST LINCOLN, AND  
EASTERN MOHAVE COUNTIES. AWAY FROM STORMS, EXPECT BREEZY  
SOUTHWESTERLY WINDS WITH GUSTS OF 15-25 KNOTS TO COME TO AN END  
TONIGHT. THUNDERSTORM CHANCES SHOULD BE MORE WIDESPREAD ON THURSDAY,  
WITH THUNDERSTORMS POSSIBLE ACROSS MUCH OF THE AREA.  

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

 
 

 
 
SHORT TERM...PIERCE  
AVIATION...WOLF  
LONG TERM...GUILLET  
 
FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:  
 
HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER  
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab NV Page
The Nexlab AZ Page
The Nexlab CA Page Main Text Page