524
FXUS65 KVEF 091004
AFDVEF
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
305 AM PDT TUE JUN 9 2026
KEY MESSAGES
* WARM, BREEZY, AND DRY CONDITIONS WILL PROMOTE HIGH FIRE DANGER
TODAY.
* A BUILDING AREA OF HIGH PRESSURE WILL RESULT IN HOT TEMPERATURES
AND INCREASING HEAT RISK BY MID TO LATE WEEK.
DISCUSSION
THROUGH MONDAY.
EXPECT ONE MORE DAY OF ELEVATED TO CRITICAL FIRE WEATHER CONDITIONS
AS HOT, DRY, AND WINDY CONDITIONS CONTINUE. THE TROUGH RESPONSIBLE
FOR STRONG SOUTHWESTERLY WINDS IS SHIFTING EAST, MEANING WINDS WILL
BE RELATIVELY LIGHTER TODAY COMPARED TO YESTERDAY IN SOUTHERN
NEVADA. THE POSITION OF THE TROUGH ALLOWS FOR GUSTY WINDS TO
CONTINUE IN NORTHWESTERN ARIZONA, MAKING IT THE AREA OF GREATEST
CONCERN FOR TODAY. SEE THE FIRE WEATHER DISCUSSION BELOW FOR MORE
DETAILS. FIRE WEATHER CONDITIONS WILL IMPROVE BY WEDNESDAY AS THE
TROUGH LIFTS OUT OF THE AREA AND WINDS SUBSIDE AREAWIDE.
HIGH PRESSURE BUILDS OVER THE WESTERN UNITED STATES STARTING
MIDWEEK. RISING HEIGHTS ALOFT AND INCREASING SURFACE TEMPERATURES
WILL MAKE HEAT THE MAIN FORECAST CONCERN THROUGH THE WEEKEND.
TEMPERATURES PEAK ON SATURDAY AND SUNDAY WITH HIGHS 5 TO 10 DEGREES
ABOVE NORMAL FOR MID-JUNE. THE INCREASE IN DAYTIME HIGHS AS WELL AS
OVERNIGHT LOWS BRINGS WIDESPREAD MODERATE (LEVEL 2 OF 4) HEAT RISK
TO THE REGION WITH AREAS OF MAJOR (LEVEL 3 OF 4) HEAT RISK IN MANY
DESERT VALLEYS INCLUDING DEATH VALLEY, THE COLORADO RIVER VALLEY,
AND THE LAS VEGAS VALLEY BETWEEN FRIDAY AND SUNDAY. THIS LEVEL OF
HEAT WILL AFFECT ANYONE WITHOUT ACCESS TO SUFFICIENT COOLING AND
HYDRATION, ESPECIALLY THOSE SPENDING TIME OUTDOORS. HOWEVER,
ENSEMBLES ARE ALSO HIGHLIGHTING A POTENTIAL TROPICAL MOISTURE PUSH
FROM THE GULF OF CALIFORNIA INTO THE DESERT SOUTHWEST OVER THE
WEEKEND, WHICH MAY BRING CLOUD COVER AND HINDER THE INCREASE IN
TEMPERATURES. LIGHT RAINFALL AND ISOLATED THUNDERSTORMS CANNOT BE
RULED OUT EITHER, PARTICULARLY ALONG HIGH TERRAIN. WILL CONTINUE TO
MONITOR THIS MOISTURE TREND THROUGHOUT THE WEEK.
AVIATION...FOR HARRY REID...FOR THE 12Z FORECAST PACKAGE
SOUTHERLY WINDS WILL CONTINUE THROUGH DAYBREAK WITH SPORATIC GUSTS
IN THE 15 TO 20 KNOT RANGE. A BRIEF LULL IN THE WIND SPEEDS IS
POSSIBLE MIDMORNING BEFORE SOUTH-SOUTHWEST WIND GUSTS RETURN DURING
THE AFTERNOON WITH GUSTS BETWEEN 20 AND 25 KTS. NO OPERATIONALLY
SIGNIFICANT CLOUD COVER THROUGH THE TAF PERIOD. HIGH TEMPERATURES
THIS AFTERNOON WILL APPROACH 100 DEGREES, WITH THE BEST CHANCES
BETWEEN 22 AND 02Z.
FOR THE REST OF SOUTHERN NEVADA, NORTHWEST ARIZONA AND SOUTHEAST
CALIFORNIA...FOR THE 12Z FORECAST PACKAGE...GUSTY SOUTH-SOUTHWEST
WINDS WILL CONTINUE IN THE LAS VEGAS VALLEY AND COLORADO RIVER
VALLEY TAF SITES THROUGH THE AFTERNOON, WITH GUST SPEEDS PEAKING
BETWEEN 25 AND 30 KTS. LIGHT NORTHWESTERLY WINDS EXPECTED AT KBIH
WITH SPEEDS BRIEFLY PICKING UP TO 8 TO 12 KTS AROUND 00Z. GUSTY WEST
WINDS AT KDAG WILL BE ELEVATED AROUND 30 KTS OVERNIGHT AND AROUND 20
KTS IN THE AFTERNOON. NO OPERATIONALLY SIGNIFICANT CLOUD COVER
THROUGH THE TAF PERIOD.
FIRE WEATHER
THE TROUGH RESPONSIBLE FOR GUSTY SOUTHWESTERLY WINDS
SHIFTS TO THE EAST TODAY AND THE MAIN FOCUS FOR WIND WILL TURN TO
NORTHWESTERN ARIZONA. WINDS GUSTING TO 40 MPH COMBINED WITH MINIMUM
HUMIDITY IN THE 5 TO 15 PERCENT RANGE WILL YIELD ELEVATED TO
CRITICAL FIRE WEATHER CONDITIONS. ANY FIRES THAT DEVELOP WILL LIKELY
SPREAD RAPIDLY. THEREFORE, THE RED FLAG WARNING WILL REMAIN IN
EFFECT FOR ALL NORTHWESTERN ARIZONA ZONES AND THE NEVADA SIDE OF THE
COLORADO RIVER VALLEY THROUGH THIS EVENING. CONDITIONS ARE EXPECTED
TO IMPROVE WEDNESDAY ONWARD AS THE TROUGH EXITS AND WINDS WEAKEN.
SPOTTER INFORMATION STATEMENT
SPOTTERS ARE ENCOURAGED TO REPORT
ANY SIGNIFICANT WEATHER OR IMPACTS ACCORDING TO STANDARD OPERATING
PROCEDURES.
DISCUSSION/FIRE WEATHER...MELTZER
AVIATION...SOULAT/CO
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