478  
FXUS65 KVEF 090735  
AFDVEF  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE LAS VEGAS NV  
1235 AM PDT FRI MAY 9 2025  
   
SYNOPSIS  
TEMPERATURES WILL CONTINUE TO CLIMB TODAY AND PEAK ON  
SATURDAY. AN INCOMING SYSTEM WILL BRING GUSTY WINDS AND COOLER  
TEMPERATURES TO THE EARLY STARTING SUNDAY THROUGH THE FIRST HALF OF  
NEXT WEEK.  
 
 
   
SHORT TERM  
TODAY AND SATURDAY  
 
TEMPERATURES CONTINUE TO CLIMB TODAY AND TOMORROW AS A RIDGE BUILDS  
OVER THE SOUTHWESTERN UNITED STATES. AFTERNOON HIGHS WILL BE 5 TO 10  
DEGREES ABOVE AVERAGE TODAY, INCREASING TO 10 TO 15 DEGREES ABOVE  
AVERAGE ON SATURDAY, THE WARMEST DAY OF THIS STRETCH OF HEAT FOR  
MOST LOCATIONS. THE PROBABILITY OF HITTING 100 DEGREES IN LAS VEGAS  
ON SATURDAY HAS GONE DOWN SINCE THE PREVIOUS FORECAST PACKAGE,  
CURRENTLY SITTING AT A 10 PERCENT CHANCE OF OCCURRENCE. MEANWHILE,  
DEATH VALLEY HAS A 50 PERCENT PROBABILITY OF REACHING 110 DEGREES AT  
FURNACE CREEK, WHICH WOULD BE THE WARMEST DAY OF THE YEAR SO FAR.  
MODERATE (LEVEL 2) HEATRISK BEGINS TO APPEAR IN THE DESERT VALLEYS  
TODAY, EXPANDING IN AREA ON SATURDAY WITH POCKETS OF MAJOR (LEVEL 3)  
IN DEATH VALLEY AND THE COLORADO RIVER VALLEY. MAJOR HEATRISK  
INDICATES THAT THIS LEVEL OF HEAT WILL AFFECT ANYONE WITHOUT  
EFFECTIVE COOLING OR ADEQUATE HYDRATION. PLAN AHEAD IF SPENDING TIME  
OUTDOORS, INCLUDING WHERE TO FIND WATER AND COOL SPACES.  
 
SOUTHERLY BREEZES START TO PICK UP ON SATURDAY IN SOUTHERN NEVADA  
AND SOUTHEASTERN CALIFORNIA AS LOW PRESSURE STARTS TO MOVE IN FROM  
THE NORTHWEST. THE STRONGEST OF THESE WINDS SHOULD MAINLY BE OVER  
HIGH TERRAIN IN INYO, ESMERALDA, AND CENTRAL NYE COUNTIES BUT REMAIN  
SUB-ADVISORY. WAVES UP TO 1.5 FEET ARE POSSIBLE IN LAKE MEAD AND  
LAKE MOHAVE.  
   
LONG TERM  
SUNDAY THROUGH THURSDAY.  
 
VERY LITTLE CHANGE FROM YESTERDAY, WHICH INCREASES CONFIDENCE.  
MODEL CLUSTERS REMAIN IN GOOD AGREEMENT SUNDAY SHOWING THE RIDGE  
AXIS BEGINNING TO MOVE EAST IN RESPONSE TO LOW PRESSURE NEARING  
THE WEST COAST. THERE IS SLIGHTLY BETTER AGREEMENT AMONG THE MODEL  
CLUSTERS MONDAY AND TUESDAY, AS THEY DEPICT THE INCOMING LOW  
REACHING THE COAST MONDAY AND THEN NEARING OR REACHING OUR AREA  
TUESDAY. FOR WEDNESDAY AND THURSDAY, THERE IS INCREASING SPREAD  
REGARDING HOW QUICKLY THE MAIN LOW WILL EXIT INTO THE NORTHERN  
PLAINS, BUT GOOD AGREEMENT THAT A WEAK, BAGGY TROUGH GETS LEFT  
BEHIND OVER THE DESERT SOUTHWEST. TURNING TO SENSIBLE WEATHER, FOR  
SUNDAY, EXPECT INCREASING WINDS AND HIGH TEMPERATURES SLIGHTLY  
COOLER THAN SATURDAY IN THE WESTERN ZONES AND SIMILAR TO SATURDAY  
IN THE CENTRAL AND EASTERN ZONES. WINDS COULD PEAK IN THE SOUTHERN  
GREAT BASIN SUNDAY, WITH THE MOJAVE DESERT MORE LIKELY ON MONDAY.  
WIND HEADLINES COULD BE NEEDED. HIGH TEMPERATURES SHOULD DROP 15  
TO 25 DEGREES AREAWIDE FROM SUNDAY TO TUESDAY BEFORE BEGINNING A  
SLOW RECOVERY WEDNESDAY. ALTHOUGH RAIN CHANCES CANNOT BE RULED  
OUT, THE MOST LIKELY EFFECTS WILL BE THE WINDS AND MUCH COOLER  
TEMPERATURES.  
 
 
   
AVIATION...FOR HARRY REID...FOR THE 06Z FORECAST PACKAGE  
LIGHT  
WINDS FOLLOWING TYPICAL WIND PATTERNS ARE EXPECTED THROUGH FRIDAY,  
WITH A HIGH PROBABILITY (90%+) THAT WINDS WILL REMAIN LESS THAN 8  
KNOTS. DRY CONDITIONS WILL PERSIST WITH ONLY A FEW CLOUDS AROUND  
12KFT AGL OVER AND NEAR THE MOUNTAINS SURROUNDING THE VALLEY  
TOMORROW AFTERNOON AND EARLY EVENING.  
 
FOR THE REST OF SOUTHERN NEVADA, NORTHWEST ARIZONA AND SOUTHEAST  
CALIFORNIA...FOR THE 06Z FORECAST PACKAGE...A LIGHT, DIURNAL WIND  
PATTERN WILL PERSIST AT MOST LOCATIONS THROUGH FRIDAY. KBIH WILL BE  
THE EXCEPTION WHERE BREEZY SOUTHEAST TO SOUTH WINDS WILL INCREASE  
AFTER 18Z TOMORROW WITH A FEW GUSTS OF 12 TO 18 KNOTS. DRY  
CONDITIONS ALONG WITH A FEW CLOUDS 12KFT TO 15KFT AGL NEAR AND OVER  
THE SIERRA AND HIGHER TERRAIN OF SOUTHERN NEVADA ARE EXPECTED  
THROUGH THE TAF PERIOD.  
 
   
SPOTTER INFORMATION STATEMENT  
SPOTTERS ARE ENCOURAGED TO REPORT  
ANY SIGNIFICANT WEATHER OR IMPACTS ACCORDING TO STANDARD OPERATING  
PROCEDURES.  
 
 
 
 
 
SHORT TERM...MELTZER  
LONG TERM...MORGAN  
AVIATION...PLANZ  
 
FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:  
HTTPS://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER  
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