012
FXUS65 KVEF 231152
AFDVEF
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
450 AM PDT THU JUL 23 2026
KEY MESSAGES
* DANGEROUS TEMPERATURES WILL CONTINUE THROUGH MONDAY ACROSS THE
MOJAVE DESERT.
* MONSOONAL MOISTURE WILL REMAIN IN PLACE OVER THE REGION, BUT DAILY
STORM COVERAGE WILL DECREASE AS WE HEAD INTO THE WEEKEND.
DISCUSSION
THROUGH WEDNESDAY.
HIGH PRESSURE WILL CONTINUE BUILD OVER THE SOUTHWESTERN US AS WE
HEAD INTO THE WEEKEND, WHICH WILL ALLOW FOR TEMPERATURES TO CONTINUE
TO INCREASE EACH DAY THROUGH THE WEEKEND. TEMPERATURES TODAY WILL BE
A FEW DEGREES HOTTER THAN YESTERDAY, RESULTING IN MAJOR HEATRISK
(LEVEL 3 OF 4) POPPING UP IN THE LOWER ELEVATIONS OF THE MOJAVE
DESERT. BY SUNDAY, TEMPERATURES WILL BE AROUND 4 TO 8 DEGREES HOTTER
THAN NORMAL FOR LATE JULY. AS TEMPERATURES CONTINUE TO RISE THROUGH
THE WEEKEND, WE WILL SEE WIDESPREAD MAJOR HEATRISK ACROSS THE MOJAVE
DESERT, WITH POCKETS OF EXTREME HEATRISK (LEVEL 4 OF 4) IN THE LOWER
ELEVATIONS AND VALLEYS (E.G., AMARGOSA VALLEY, COLORADO RIVER
VALLEY, AND GOLDEN VALLEY). WHILE HIGH TEMPERATURES 4 TO 8 DEGREES
AREN'T RECORD BREAKING FOR THIS TIME OF YEAR, LINGERING MONSOONAL
MOISTURE WILL MAKE THE HEAT MORE UNCOMFORTABLE THAN NORMAL AND
OVERNIGHT LOW TEMPERATURES AROUND 5 TO 10 DEGREES ABOVE NORMAL WILL
LIMIT OVERNIGHT RECOVERY; ESPECIALLY IN THE LAS VEGAS VALLEY WHERE
LOW TEMPERATURES WILL BE 90+ DEGREES. GIVEN THE THREAT POSED BY THIS
HEAT, AN EXTREME HEAT WARNING WILL GO INTO EFFECT FOR THE MOJAVE
DESERT BEGINNING THIS MORNING, CONTINUING THROUGH MONDAY EVENING.
THE AFOREMENTIONED HIGH PRESSURE SYSTEM WILL KEEP MONSOONAL MOISTURE
IN PLACE THROUGH THE WEEKEND. THIS WILL ALLOW FOR ISOLATED AFTERNOON
CONVECTION IN THE HIGHER TERRAIN AROUND THE EDGES OF OUR FORECAST
AREA (NORTHWESTERN AZ, SOUTHERN GREAT BASIN, AND EASTERN SIERRA),
WHERE THERE IS A 15 TO 30% CHANCE OF PRECIPITATION THIS AFTERNOON
AND EVENING. CHANCES FOR AFTERNOON SHOWERS AND THUNDERSTORMS WILL
RETURN ON FRIDAY, AS SOUTHEASTERLY FLOW ALOFT BRINGS AN INCREASE IN
MOISTURE TO THE AREA. CONVECTIVE ACTIVITY OVER THE WEEKEND SHOULD BE
SPARSE, WITH ISOLATED FLASH FLOODING AND GUSTY OUTFLOW WINDS
CONTINUING TO BE THE PRIMARY THREATS.
AVIATION...FOR HARRY REID...FOR THE 12Z FORECAST PACKAGE
GENERALLY LIGHT WINDS CONTINUE TODAY WITH AFTERNOON WINDS FAVORING A
NORTHEAST TO EAST DIRECTION WITH SPEEDS GENERALLY 7 KNOTS OR LESS.
TEMPERATURES WILL AGAIN EXCEED 100F FROM 19Z-04Z WITH A HIGH OF
109F. NO THUNDERSTORMS IN THE REGION TODAY, THOUGH SOME LOW
PROBABILITIES WILL RETURN FRIDAY.
FOR THE REST OF SOUTHERN NEVADA, NORTHWEST ARIZONA AND SOUTHEAST
CALIFORNIA...FOR THE 12Z FORECAST PACKAGE...ASIDE FROM A FEW
ISOLATED THUNDERSTORMS OVER THE SOUTHERN GREAT BASIN, DRY CONDITIONS
ARE FAVORED ACROSS THE REGION TODAY WITH GENERALLY LIGHT WINDS. ONLY
EXCEPTION IS ACROSS THE OWENS VALLEY WHERE SOUTHERLY WINDS GUSTING
TO 20 KNOTS ARE EXPECTED THROUGH THE AFTERNOON AND EVENING. IN
ADDITION, POCKETS OF SMOKE CAN BE EXPECTED IN THE SIERRA REGION NEAR
THE ROCK FIRE, BUT OTHERWISE NO MAJOR VISIBILITY RESTRICTIONS ARE
EXPECTED.
SPOTTER INFORMATION STATEMENT
SPOTTERS ARE ENCOURAGED TO REPORT
ANY SIGNIFICANT WEATHER OR IMPACTS ACCORDING TO STANDARD OPERATING
PROCEDURES.
DISCUSSION...STESSMAN
AVIATION...OUTLER
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