583
FXUS65 KVEF 040529
AFDVEF

Area Forecast Discussion
National Weather Service Las Vegas NV
1029 PM PDT Wed Sep 3 2025

.KEY MESSAGES...

* Monsoonal moisture remains in place today before slowly retreating
  eastward out of the region, shifting the best precipitation
  chances further east each day through Saturday.

&&

.DISCUSSION...

An upper level system located along the California/Nevada border is
the main trigger for storms across the area this afternoon and
evening. A band leftover showers from overnight along with
substantial cloud cover will delay the overall activity for much of
the afternoon in southern Nevada. This system will push to the
northeast and through southern Nevada overnight bringing much of the
activity with it. Another area of focus will be over central and
northern Mohave County, with storms moving similarly from south to
north. The main impact from these storms will be heavy downpours but
the storms will be moving relatively fast and should help limit
rainfall totals at a given location. However, training of storms is
also possible. Gusty outflow winds with storms will be most favored
over Mohave County where DCAPE values are exceeding 1000 J/kg. Drier
air will continue to push to the east over the next several days.
Storms are more likely over Clark, Lincoln and Mohave Counties on
Thursday and Friday, and favoring Mohave County on Saturday. Direct
moisture related to Hurricane Lorena should stay well to our
southeast. Temperatures will remain below normal through the period
with highs in the Las Vegas Valley remaining in the 90s.

&&

.AVIATION...For Harry Reid...For the 06Z Forecast Package...After
quiet weather overnight, scattered storms are expected to develop on
the mountains again Thursday afternoon, likely affecting all
corridors and possibly drifting into the Valley. Winds should be
light until becoming easterly mid morning, possibly remaining
easterly all day or shifting to southerly in the early afternoon.
Temperatures are expected to remain below 100F Thursday.

For the rest of southern Nevada, northwest Arizona and southeast
California...For the 06Z Forecast Package...Scattered thunderstorms
will affect the region again Thursday afternoon. The main threats
with storms will be erratic gusty winds, very heavy rain, and low
ceilings with terrain obscuration. There are some signs of
thunderstorms late Thursday evening tracking all the way from
Lincoln County through Clark and Mohave counties, possibly lasting
all night, but confidence is low in these details. Away from
thunderstorms, wind gusts should be 20 knots or less with VFR
conditions expected.
&&

.SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report
any significant weather or impacts according to standard operating
procedures.

&&

$$

DISCUSSION...Czyzyk
AVIATION...Morgan

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