799  
FXUS65 KVEF 241056  
AFDVEF  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE LAS VEGAS NV  
356 AM PDT THU MAY 24 2018  
   
SYNOPSIS
 
MOSTLY SUNNY SKIES AND AND WARMER TEMPS EXPECTED TODAY.  
THE WEATHER PATTERN WILL CHANGE FRIDAY INTO THE HOLIDAY WEEKEND  
AS THE NEXT STORM SYSTEM PASSES ACROSS THE REGION BRINGING GUSTY  
WINDS AND COOLER TEMPS TO THE AREA. SHOWER AND STORM ACTIVITY WILL  
LIKELY REMAIN ACROSS THE SOUTHERN GREAT BASIN AS WELL AS THE  
HIGHER ELEVATIONS OF CLARK COUNTY.
 
   
SHORT TERM
 
TODAY THROUGH SATURDAY.  
 
SOUTHWEST FLOW WILL CONTINUE THROUGH THURSDAY ALLOWING FOR  
TEMPERATURES TO WARM UP A FEW MORE DEGREES THAN YESTERDAY. LINGERING  
MOISTURE ACROSS THE SIERRA MOUNTAINS WILL ALLOW FOR A SLIGHT CHANCE  
OF A FEW ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS ACROSS THE  
EASTERN SIERRA MOUNTAINS THIS AFTERNOON.  
 
BY FRIDAY AFTERNOON THE AFOREMENTIONED CLOSED UPPER LOW WILL BE  
CENTERED OVER THE CENTRAL COAST OF CALIFORNIA AND WILL PROVIDE  
ENOUGH DYNAMICS AND MOISTURE TO BRING STORM CHANCES ACROSS THE  
SOUTHERN SIERRA MOUNTAINS AND INTO ESMERALDA COUNTY FRIDAY  
AFTERNOON. SOUTH TO SOUTHWEST WINDS ARE EXPECTED TO ALSO INCREASE  
AS THE UPPER LOW MOVES FURTHER INLAND LATER THIS WEEK AND INTO THE  
HOLIDAY WEEKEND, WITH THE STRONGEST WINDS EXPECTED FRIDAY  
AFTERNOON. THE WINDIEST LOCATIONS ARE EXPECTED TO BE ACROSS THE  
HIGHER TERRAIN, WESTERN PORTIONS OF SAN BERNARDINO COUNTY WITH  
GUSTS UP TO 40 TO 50 MPH AND THE COLORADO RIVER VALLEY WITH GUSTS  
UP TO 30 TO 40 MPH WITH SLIGHTLY WEAKER WINDS EXPECTED ELSEWHERE.  
AS SUCH, A WIND ADVISORY HAS BEEN ISSUED FOR WESTERN SAN  
BERNARDINO COUNTY, AND A LAKE WIND ADVISORY FOR PORTIONS OF THE  
COLORADO RIVER VALLEY, INCLUDING THE LAKE MEAD RECREATION AREA,  
FROM 11AM TO 8PM FRIDAY.  
 
BY SATURDAY, THE UPPER LOW WILL BE CENTERED OVER THE GREAT BASIN  
REGION BRINGING SHOWER AND STORM CHANCES ACROSS THE SIERRA  
MOUNTAINS, CENTRAL NV AND PORTIONS OF SOUTHERN NV. STORM ACTIVITY  
IN CLARK COUNTY WILL MAINLY BE CONFINED TO THE SPRING MOUNTAINS  
AND SHEEP RANGE SATURDAY AFTERNOON. WEAKER WINDS ARE EXPECTED  
SATURDAY AFTERNOON WITH ONLY SOME SOUTHWEST BREEZES EXPECTED AHEAD  
OF A SURFACE COLD FRONT EXPECTED TO MOVE THROUGH OVERNIGHT  
SATURDAY.  
   
LONG TERM
 
SUNDAY THROUGH THURSDAY.  
 
LITTLE CHANGE WAS MADE THROUGH THE LONG TERM PERIOD THIS MORNING. BY  
SUNDAY MORNING THE UPPER LEVEL LOW THAT WILL IMPACT THE AREA THROUGH  
THE SHORT TERM PERIOD WILL BE STALLED AND WOBBLING SOMEWHERE ALONG  
THE NV/UT BORDER. THIS WILL RESULT IN CONTINUED SHOWERS AND ISOLATED  
STORM ACROSS THE SIERRA AND SOUTHERN GREAT BASIN. ON MONDAY, THE LOW  
WILL FINALLY BEGIN TO LIFT NORTHEAST, RESULTING IN INCREASING  
TEMPERATURES AND LOWER CHANCES OF PRECIPITATION. TEMPERATURES ARE  
LIKELY TO RISE THROUGH THE MIDDLE OF NEXT WEEK, WITH HIGHS REACHING  
THE UPPER 90S TO NEAR 100 BY WEDNESDAY IN LAS VEGAS. GUIDANCE  
CONTINUES TO INDICATE A PROGRESSIVE PATTERN ACROSS THE WESTERN (AND  
ESPECIALLY NORTHWESTERN) CONUS THROUGH NEXT WEEK. THEREFORE, THIS  
ROLLER COASTER IN TEMPERATURES AS WELL AS OCCASIONAL WINDS AND  
SHOWERS ACROSS THE GREAT BASIN IS LIKELY TO CONTINUE FOR THE  
FORESEEABLE FUTURE. THE GOOD NEWS IS THAT THERE IS LITTLE SIGN OF  
ANY IMPENDING HEAT WAVE, WHICH IS WELCOME AS JUNE APPROACHES.  

 
   
AVIATION...FOR MCCARRAN
 
DIURNAL TRENDS ARE EXPECTED TO CONTINUE  
THIS MORNING BEFORE SIMILAR GUSTY, SOUTHEAST WINDS FROM YESTERDAY  
INITIATE AGAIN THIS AFTERNOON. EXPECT SOUTH TO SOUTHEAST GUSTS UP  
TO 20 KTS. THE TRANSITION TO SOUTHWESTERLY WINDS CAN BE EXPECTED  
BETWEEN 04-06Z THIS EVENING WITH DECREASING WIND SPEEDS OVERNIGHT.  
VFR CONDITIONS THROUGH THE FORECAST PERIOD. STRONGER WINDS ARE  
EXPECTED FRIDAY.  
 
FOR THE REST OF SOUTHERN NEVADA, NORTHWEST ARIZONA AND SOUTHEAST  
CALIFORNIA...DIURNAL TRENDS ARE EXPECTED TO CONTINUE  
THIS MORNING BEFORE SIMILAR GUSTY, SOUTHERLY WINDS FROM YESTERDAY  
INITIATE AGAIN THIS AFTERNOON. EXPECT SOUTH TO SOUTHEAST GUSTS UP  
TO 20 TO 30 KTS, WITH STRONGEST WINDS EXPECTED AT KBIH AND KDAG.  
TYPICAL DIURNAL WINDS EXPECTED OVERNIGHT. VFR CONDITIONS THROUGH  
THE FORECAST PERIOD.
 
   
FIRE WEATHER
 
AN APPROACHING WEATHER SYSTEM WILL RESULT IN  
INCREASED WINDS AREA WIDE ON FRIDAY. PRECIPITATION CHANCES WILL BE  
LIMITED TO THE SIERRA AND SOUTHERN GREAT BASIN. WIND GUSTS ACROSS  
THE COLORADO RIVER VALLEY NORTH OF BULLHEAD CITY AS WELL AS THE  
HIGHER ELEVATIONS OF MOHAVE COUNTY WILL HOVER AROUND 35 MPH.  
MEANWHILE MINIMUM RHS IN THOSE AREAS WILL REACH THE SINGLE DIGITS IN  
THE VALLEYS AND LOW TEENS IN THE MOUNTAINS. THIS COULD RESULT IN  
CRITICAL FIRE WEATHER CONDITIONS ON FRIDAY. A FIRE WEATHER WATCH HAS  
BEEN ISSUED FOR THE COLORADO RIVER VALLEY NORTH OF NEEDLES AND THE  
REST OF MOHAVE COUNTY. WINDS WILL DECREASE SATURDAY AS RHS INCREASE  
SLIGHTLY, LIMITING FIRE WEATHER CONCERNS. A DRYING AND WARMING TREND  
WILL TAKE PLACE SUNDAY THROUGH THE MIDDLE OF NEXT WEEK, HOWEVER  
WINDS SHOULD REMAIN BELOW CRITICAL THRESHOLDS.  

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

 

 
 
SHORT TERM/AVIATION...KRYSTON  
LONG TERM/FIRE WEATHER...WOLCOTT  
 
FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:  
 
HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER  
 
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