236
FXUS65 KVEF 082220
AFDVEF
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
320 PM PDT MON JUN 8 2026
KEY MESSAGES
* WARM, BREEZY AND DRY CONDITIONS WILL CONTINUE TO PROMOTE HIGH
FIRE DANGER THROUGH TUESDAY.
* A BUILDING AREA OF HIGH PRESSURE WILL RESULT IN HOT TEMPERATURES
AND INCREASING HEAT RISK BY MID TO LATE WEEK.
DISCUSSION
AS AN UPPER TROUGH CONTINUES TO DRIFT ACROSS THE PACIFIC
NORTHWEST, BREEZY SOUTH/SOUTHWEST WINDS PERSIST ACROSS MUCH OF THE
DESERT SOUTHWEST. THIS COUPLED WITH WARM TO HOT TEMPERATURES AND
LOW HUMIDITIES CONTINUES TO PROMOTE HIGH FIRE DANGER. SOME
IMPROVEMENT IN CONDITIONS WILL BE FELT OVERNIGHT AS HUMIDITIES
CLIMB AND WINDS DECREASE SLIGHTLY. HOWEVER, MUCH OF
NORTHERN/WESTERN ARIZONA AND THE ADJACENT COLORADO RIVER VALLEY
WILL REMAIN HOT, DRY AND WINDY ON TUESDAY, WITH A CONTINUED THREAT
OF WILDFIRES. THE FIRE DANGER WILL DROP MARKEDLY WEDNESDAY INTO
THURSDAY AS WINDS DECREASE AND HIGH PRESSURE BUILDS IN OVER THE
REGION.
FROM MIDWEEK ON, AS THE UPPER TROUGH SHIFTS EASTWARD, GLOBAL
ENSEMBLES DEPICT A BROAD AND POTENT UPPER DEVELOPING ACROSS THE
PACIFIC NORTHWEST, EXTENDING SOUTHWARD ALONG THE PACIFIC COAST AND
INTO THE DESERT SOUTHWEST. THIS WILL USHER IN A PERIOD OF
UNSEASONABLY HOT CONDITIONS FOR MID-JUNE, WITH WIDESPREAD TRIPLE
DIGIT HIGHS. IN FACT, SOME AREAS WILL SEE A 50% OR BETTER CHANCE
OF MAXIMUM TEMPERATURES OF 110 DEGREES OR MORE, INCLUDING THE
COLORADO RIVER VALLEY AND DEATH VALLEY FRIDAY THROUGH THE WEEKEND.
THE INCREASE IN BOTH DAYTIME HIGHS AND OVERNIGHT LOWS WILL RESULT
IN A RE-EMERGENCE OF MAJOR HEAT RISK IN MANY AREAS, MAKING HEAT A
SIGNIFICANT FACTOR FOR THOSE OUTDOORS OR WITHOUT PROPER COOLING
AND HYDRATION. ONE POTENTIAL FAILURE MODE FOR HOTTER TEMPERATURES
RELATES TO AN AREA OF TROPICAL MOISTURE OVER THE BAJA. SOME
ENSEMBLE SOLUTIONS DEPICT AREAS OF MID AND HIGH CLOUDINESS
SPREADING NORTHWARD ACROSS THE DESERT SOUTHWEST SATURDAY AND
SUNDAY AS MOISTURE IS SHEARED OFF OF THIS FEATURE. SHOULD THIS
MATERIALIZE, IT WOULD LIMIT DAYTIME HIGHS AND PERHAPS BRING AND
ISOLATED SHOWER OR THUNDERSTORM RISK, HOWEVER CONFIDENCE IS LOW IN
THIS OCCURRENCE. THIS WILL BE SOMETHING TO MONITOR AS WE MOVE
FURTHER INTO THE WORKWEEK AND ENSEMBLES SETTLED ON A MORE
CONSISTENT SOLUTION.
AVIATION...FOR HARRY REID
FOR THE 00Z FORECAST
PACKAGE... GUSTY SOUTHWEST WINDS WITH GUSTS OF 25-30 KTS WILL
CONTINUE THROUGH SUNSET AT WHICH TIME WIND WILL BECOME LIGHTER WITH
OCCASIONAL GUSTS OF 15-20 KTS LINGERING THROUGH THE EARLY OVERNIGHT
HOURS. WIND DIRECTION WILL REMAIN GENERALLY SOUTHWESTERLY THROUGH
THE FORECAST PERIOD WITH SOME VARIABILITY BETWEEN 190 AND
230 DEGREES. PERIODS OF HIGH CLOUD COVER ARE EXPECTED THROUGH
THE NIGHT BEFORE CLEANING OUT EARLY TUESDAY. HIGH TEMPERATURE
TUESDAY SHOULD REMAIN JUST UNDER 100 DEGREES.
FOR THE REST OF SOUTHERN NEVADA, NORTHWEST ARIZONA AND SOUTHEAST
CALIFORNIA...FOR THE 00Z FORECAST PACKAGE...GUSTY SOUTH-SOUTHWEST
WINDS WILL CONTINUE THROUGH THE EVENING HOURS BEFORE DIMINISHING
AROUND SUNSET ACROSS THE LAS VEGAS VALLEY AND COLORADO RIVER VALLEY
WITH GUSTS PEAKING BETWEEN 25 AND 30 KTS. KDAG WILL SEE
WESTERLY WINDS THROUGH THE PERIOD, WITH A PUSH OF STRONGER GUSTS TO
NEAR 30 KNOTS THAT WILL CONTINUE OVERNIGHT.
PERIODS OF PASSING HIGH CLOUD COVER AOA 20KFT AGL EXPECTED.
FIRE WEATHER
WIDESPREAD GUSTY SOUTHWESTERLY WINDS COMBINED WITH
LOW HUMIDITY AND DRY FUELS RESULT IN ELEVATED TO CRITICAL FIRE
WEATHER CONDITIONS FOR MUCH OF SOUTHERN NEVADA INTO WESTERN
ARIZONA. A RED FLAG WARNING REMAINS IN EFFECT FOR NORTHWESTERN
ARIZONA AND MOST OF SOUTHERN NEVADA TODAY. FOR TOMORROW, THE
TROUGH RESPONSIBLE FOR THESE WINDS SHIFT TO THE EAST, BRINGING THE
MAIN FOCUS FOR GUSTY SOUTHWESTERLY WINDS TO NORTHWESTERN ARIZONA.
THEREFORE, THE RED FLAG WARNING WILL REMAIN IN EFFECT FOR ALL
NORTHWESTERN ARIZONA ZONES AND THE NEVADA SIDE OF THE COLORADO
RIVER VALLEY TOMORROW AS WELL. CONDITIONS ARE EXPECTED TO IMPROVE
WEDNESDAY ONWARD AS THE SYSTEM EXITS AND WINDS WEAKEN.
SPOTTER INFORMATION STATEMENT
SPOTTERS ARE ENCOURAGED TO REPORT
ANY SIGNIFICANT WEATHER OR IMPACTS ACCORDING TO STANDARD OPERATING
PROCEDURES.
DISCUSSION...AUSTIN
AVIATION...BERC
FIRE WEATHER...OUTLER
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