046
FXUS65 KVEF 091750
AFDVEF
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
1050 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 TUESDAY.
THE TROUGH RESPONSIBLE FOR THE WINDY CONDITIONS OVER THE PAST FEW
DAYS WILL SHIFT EAST TODAY BRINGING DECREASING WINDS, BUT WARMING
TEMPERATURES AS HIGH PRESSURE BUILDS OVER THE REGION. ELEVATED TO
CRITICAL FIRE WEATHER CONDITIONS WILL STILL PERSIST INTO THIS
EVENING ACROSS NORTHWEST ARIZONA WHERE RED FLAG WARNING REMAIN IN
PLACE THROUGH 9 PM PDT/MST. SEE THE FIRE WEATHER DISCUSSION BELOW
FOR MORE DETAILS.
HIGH PRESSURE WILL BUILD THROUGH THE REMAINDER OF THE WEEK WITH
RISING HEIGHTS AND TEMPERATURES, MAKING THE 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.
THE ONE POTENTIAL CAVEAT WILL BE WHAT HAPPENS WITH MOISTURE FROM
TROPICAL SYSTEMS BORIS AND CHRISTINA WHICH ARE CURRENTLY LOCATED
BETWEEN 12 AND 17 DEGREES NORTH JUST OFF THE MEXICAN AND CENTRAL
AMERICAN COASTS. THE LATEST ENSEMBLE MEMBERS SHOW ANOMALOUS PWATS
FROM ABOUT 200-225% PUSHING INTO SOUTHERN AND CENTRAL ARIZONA WITH
PWATS NEAR 150-200% WORKING AT FAR NORTH AS THE LOWER COLORADO RIVER
VALLEY. WE MAY END UP SEEING ENOUGH CLOUD COVER TO HELP SUPPRESS
AFTERNOON TEMPERATURES ALONG WITH THE POSSIBILITY OF ISOLATED
SHOWERS AND THUNDERSTORMS ACROSS OUR FAR SOUTHERN ZONES.
AVIATION...FOR HARRY REID...FOR THE 18Z FORECAST PACKAGE
MAINLY
SOUTHERLY WINDS WILL CONTINUE INTO THE EARLY AFTERNOON BEFORE
TURNING TO A MORE SOUTHWESTERLY DIRECTION BETWEEN 20Z AND 22Z.
OCCASIONAL GUSTS OF 20 TO 25 KNOTS CAN ALSO BE EXPECTED THROUGH
EARLY EVENING. WINDS WILL DIMINISH OVERNIGHT, WITH LIGHT AND
VARIABLE CONDITIONS EXPECTED BY DAYBREAK. NO OPERATIONALLY
SIGNIFICANT CLOUD COVER IS EXPECTED THROUGH WEDNESDAY AFTERNOON.
HIGH TEMPERATURES THIS AFTERNOON WILL APPROACH 100 DEGREES, WITH THE
BEST CHANCES BETWEEN 22Z AND 02Z. HIGHS WEDNESDAY ARE EXPECTED TO
TOP OUT AROUND 105F.
FOR THE REST OF SOUTHERN NEVADA, NORTHWEST ARIZONA AND SOUTHEAST
CALIFORNIA...FOR THE 18Z FORECAST PACKAGE...GUSTY SOUTH-SOUTHWEST
WINDS WILL CONTINUE AT THE LAS VEGAS VALLEY AND COLORADO RIVER
VALLEY TAF SITES THROUGH THE AFTERNOON, WITH GUST PEAKING BETWEEN 22
AND 28 KTS. LIGHT NORTHWESTERLY WINDS ARE EXPECTED AT KBIH, WITH
SPEEDS BRIEFLY PICKING UP TO 8 TO 12 KTS AROUND 00Z. NO
OPERATIONALLY SIGNIFICANT CLOUD COVER IS EXPECTED 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...GORELOW
AVIATION...PLANZ
FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:
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