879
FXUS65 KVEF 231848
AFDVEF

Area Forecast Discussion
National Weather Service Las Vegas NV
1150 AM PDT Thu Jul 23 2026

.KEY MESSAGES...

* Dangerous temperatures will continue through Monday across the
  Mojave Desert.

* Monsoonal moisture will remain in place over the region, but daily
  storm coverage will decrease as we head into the weekend.

&&

.DISCUSSION...through Thursday.

Building heat will be the biggest concern over the next few days as
high pressure strengthens over the Desert Southwest. Temperatures
will continue to rise over several days, likely peaking this weekend
before slowly decreasing next week. We will start to see more
widespread Major HeatRisk (Level 3 of 4) Friday with increasing
areas of Extreme HeatRisk (Level 4 of 4) across many of the lower
deserts over the weekend. Although high temperatures are expected to
be just shy of records (around 5 to 8 degrees above normal);
however, overnight low temperatures will remain quite warm with lows
in Las Vegas, likely remaining above 90 degrees for several days.
With lingering monsoonal moisture, the heat will make things feel
rather uncomfortable for anyone outdoors. Given the threat posed by
this heat, an Extreme Heat Warning is in effect from today through
Monday evening.

Although PWATs will still remain around 150% of normal through the
weekend, there really isn`t much instability to work with. The
greatest threat of afternoon thunderstorm activity will remain over
Mohave and Lincoln counties (15-30%) with probabilities generally
less than 15% for storms to develop over the higher terrain of Clark
and Nye counties. The greatest threat from any storm will be gusty
outflow winds and isolated flash flooding. Thunderstorm chances will
persist into the middle part of next week, but with some drying
occurring over the western portions of the CWA, they will mainly be
confined to the higher terrain of mainly Mohave and Lincoln counties.

&&

.AVIATION...For Harry Reid...For the 18Z Forecast Package...
Generally light winds continue today with afternoon winds favoring a
northeast to east direction with speeds generally 7 knots or less.
Temperatures will again exceed 100F from 18z-05z with a high of
110F. No thunderstorms in the region today, though some low
probabilities will return Friday.

For the rest of southern Nevada, northwest Arizona and southeast
California...For the 18Z Forecast Package...Aside from a few
isolated thunderstorms over the higher terrain of the southern Great
Basin, dry conditions are favored across the region today with
generally light winds. Only exception is across the Owens Valley
where southerly winds gusting to 20 knots are expected through the
afternoon and evening. In addition, pockets of smoke can be expected
in the Sierra region near the Rock Fire, but otherwise no major
visibility restrictions are expected.

&&

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

&&

$$

DISCUSSION/Aviation...Gorelow

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