355
FXUS65 KVEF 050525
AFDVEF
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
1025 PM PDT FRI JUL 4 2025
KEY MESSAGES
* HAZE AND SMOKE WILL REMAIN VISIBLE THROUGH THE WEEKEND AS A RESULT
OF NEARBY WILDFIRE AND FIREWORK ACTIVITY.
* TEMPERATURES WILL ECLIPSE SEASONAL AVERAGES BY THE END OF THIS
WEEKEND, WITH TEMPERATURES CONTINUING TO CLIMB THROUGH THE WORK
WEEK.
DISCUSSION
TODAY THROUGH FRIDAY.
A SHORTWAVE TROUGH PUSHING THROUGH THE SOUTHERN GREAT BASIN WILL
ELEVATE SURFACE PRESSURE GRADIENTS ACROSS THE DESERT SOUTHWEST, AS
AN AREA OF HIGH PRESSURE BUILDS OVER NORTHERN MEXICO. AS A RESULT,
GUSTY SOUTHWESTERLY WINDS BETWEEN 25 AND 35 MPH ARE EXPECTED THIS
AFTERNOON. THESE WINDS COMBINED WITH VERY DRY CONDITIONS AND DRY
VEGETATION WILL INCREASE WILDFIRE RISK ACROSS SOUTHERN NEVADA AND
NORTHWESTERN ARIZONA. THESE CONCERNS ARE EXACERBATED BY INDEPENDENCE
DAY ACTIVITIES INCLUDING COOKOUTS, CAMPFIRES, AND FIREWORKS. IF
PLANNING ANY OF THESE EVENTS, PLEASE ENSURE YOU HAVE A BUCKET OF
WATER AND/OR A HOSE NEARBY TO EXTINGUISH ANY FIRES THAT MAY OCCUR.
FORE MORE INFORMATION, SEE THE FIRE WEATHER DISCUSSION BELOW.
SOUTHWESTERLY WINDS WILL CONTINUE OVER THE NEXT COUPLE OF DAYS, BUT
TO A LESSER MAGNITUDE, WHICH WILL ABATE FIRE CONCERNS.
THE MADRE FIRE IN SOUTHERN CALIFORNIA NORTHEAST OF SANTA MARIA IS UP
TO 70,800 ACRES AS OF 12 PM PDT. DUE TO PERSISTENT SOUTHWESTERLY
WINDS THROUGH THE WEEKEND, WE CAN EXPECT TO SEE SMOKE AND HAZE ON
THE HORIZON FOR THE NEXT FEW DAYS.
A GROWING RIDGE OF HIGH PRESSURE IS CENTERED OVER NORTHERN MEXICO
AND WILL ALLOW HEIGHTS TO RISE OVER THE DESERT SOUTHWEST THROUGH
THIS WEEKEND AND THE UPCOMING WORK WEEK. THERE REMAINS SOME
UNCERTAINTY REGARDING HOW HIGH TEMPERATURES WILL CLIMB HEADING INTO
NEXT WEEKEND, AS ENSEMBLES CONTINUE TO RESOLVE A CUT OFF LOW'S
IMPACT TO THE DOMINANT HIGH LATE-WEEK. LATEST RUNS SHOW THIS CUT-OFF
LOW WEAKEN INTO AN OPEN WAVE AS IT PUSHES INTO THE SOUTHERN GREAT
BASIN WEDNESDAY AND THURSDAY. PWATS INCREASE VERY MODESTLY... FROM
0.25-0.4" TO 0.5-0.7". NOT EXPECTING PRECIPITATION AT THIS TIME,
BUT CAN'T RULE OUT SOME PARTIAL CLOUD COVER, WHICH WILL HELP
REDUCE AFTERNOON HIGH TEMPERATURES. WILL CONTINUE TO ASSESS THE
INTENSITY OF THE UPCOMING HEATWAVE, BUT REGARDLESS OF EXACT
TEMPERATURES, THIS IS OUR HOTTEST TIME OF YEAR, SO TAKE
PRECAUTIONS IF HEADING OUTSIDE SUCH AS INCREASING WATER
CONSUMPTION, WEARING SUNSCREEN, AND EATING LIGHT MEALS DURING THE
DAY.
AVIATION...FOR HARRY REID...FOR THE 06Z FORECAST PACKAGE
GUSTY
SOUTHWESTERLY WINDS WILL SETTLE DOWN OVERNIGHT BEFORE PICKING BACK
UP WITH GUSTS OF 20 TO 25 KNOTS LATE SATURDAY MORNING. WINDS WILL
THEN SETTLE DOWN AGAIN AROUND SUNSET. NO CLOUDS OR WEATHER EXPECTED.
TEMPERATURE RISING TO 100F AROUND 20-21Z, REACHING A HIGH NEAR 102F
AROUND 23Z, THEN FALLING BELOW 100F AROUND 02-03Z.
FOR THE REST OF SOUTHERN NEVADA, NORTHWESTERN ARIZONA, AND
SOUTHEASTERN CALIFORNIA...FOR THE 06Z FORECAST PACKAGE...SOUTH TO
SOUTHWEST WINDS WILL BE A LITTLE WEAKER SATURDAY THAN ON FRIDAY,
WITH GUSTS OF 15 TO 25 KNOTS COMMON AROUND THE REGION IN THE
AFTERNOON. WINDS WILL SETTLE DOWN AROUND SUNSET, EXCEPT IN AREAS
SUCH AS AROUND BARSTOW WHICH NORMALLY SEE STRONG WINDS AFTER SUNSET.
NO CLOUDS OR WEATHER EXPECTED. SLANTWISE VISIBILITY REDUCTIONS
EXPECTED DUE TO SMOKE FROM THE MADRE FIRE IN SOUTHERN CALIFORNIA.
SPOTTER INFORMATION STATEMENT
SPOTTERS ARE ENCOURAGED TO REPORT
ANY SIGNIFICANT WEATHER OR IMPACTS ACCORDING TO STANDARD OPERATING
PROCEDURES.
DISCUSSION...SOULAT
AVIATION...MORGAN
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