154
FXUS65 KVEF 090659
AFDVEF

Area Forecast Discussion
National Weather Service Las Vegas NV
1155 PM PDT Tue Sep 8 2026

.KEY MESSAGES...

*  Above-normal temperatures expected mid-to-late week, hottest day
   of the week will be Thursday when the Extreme Heat Warning is in
   effect

*  Breezy south-southwesterly wind gusts expected across the
   region Friday through the weekend.

&&

.DISCUSSION...Through Early Next Week

Another stretch of above normal temperatures is expected this week
across the Mohave Desert and lower Great Basin as a ridge of high
pressure shifts eastward. A hot airmass is currently in place across
the region as 850mb temperature anomalies are already above normal
for this time of year, supporting highs at or above 100 in desert
valleys and 110s in the CRV and around Death Valley. As the ridge
strengthens and retrogrades west, it becomes centered overhead on
Thursday. Increasing subsidence under the 595dm ridge in addition to
the hot airmass will promote well above normal to near record high
temperatures by Thursday in desert valleys; therefore an Extreme Heat
Warning is in effect for the daytime hours on Thursday for Death
Valley, the Las Vegas Valley, Pahrump Valley, Moapa Valley, Colorado
River Valley, southern Mohave County, and southeastern San
Bernardino County. Lingering monsoonal moisture will also keep
nighttime lows elevated as well with lows in the 80s likely in
desert valleys, preventing much relief, if any, from the hot
daytime temperatures. Still expecting a slow downward trend in
temperatures into the weekend as a trough pushes into the west
coast, bringing slightly cooler temperatures to the region...yet
still above normal for this time of year. Expect temperatures to
drop a few degrees Friday along with an additional drop around 2 to
4 degrees Saturday with temperatures close to normal by early next
week.

As mentioned above, lingering monsoonal moisture still remains in
place for portions of the region. Generally dry conditions are
expected through the week, but weak moisture return northward on the
west side of the ridge Wednesday and Thursday should allow for
isolated thunderstorms in the Sierra and terrain of the southern
Great Basin. Not expecting anything widespread, in fact most
locations, especially around Las Vegas, will remain fairly dry.

The aforementioned trough pushing into the western US will bring
cooler temperatures but also increasing southwest winds to the
region. Guidance continues to show a mid level jet streak developing
overhead on Saturday at or above 40 kts. Mixing into this area of
stronger winds may result in widespread gusts mixing down to the
surface 30-40 MPH, with over a 50% chance of gusts over 40 MPH in
the western Mojave Desert. There could also be some gusty southerly
winds impacting Lake Mohave and Lake Havasu this weekend, which
could impact boaters with winds and waves. If forecast trends
continue over the next few days, wind headlines may be needed for
Saturday.

&&

.AVIATION...For Harry Reid...For the 06Z Forecast Package...Winds
will generally follow typical daily directional patterns through
the forecast period, with light and variable winds expected to
shift to the northeast by mid- to late morning, then gradually
veer to the southwest by mid- to late evening. Wind speeds are
expected to remain under 10KT, with VFR conditions prevailing.
Temperatures Wednesday will exceed 100 degrees between roughly
20Z-02Z, reaching a high of 105 degrees.


For the rest of southern Nevada, northwest Arizona and southeast
California...For the 06Z Forecast Package...Winds will generally
follow typical daily directional patterns over the next 24 hours,
with speeds around 5-10KT. The primary exception will be along
the Lower Colorado River Valley, particularly near KIFP, where
gusty down-valley northerly winds are expected to develop mid-
morning through sunset, with intermittent gusts to around 20-25KT,
particularly during the afternoon. VFR conditions will prevail,
with passing bands of clouds with bases at or above 12kft.

&&

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

&&

$$

DISCUSSION...Moore
AVIATION...Phillipson

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