Henderson, Nevada Weather Forecast Discussion

362
FXUS65 KVEF 202000
AFDVEF
Area Forecast Discussion
National Weather Service Las Vegas NV
100 PM PDT Sat Sep 20 2025
.KEY MESSAGES...
* Slight chances for showers and thunderstorms will linger through
  the weekend and into the upcoming week.
* Humid conditions will continue, and additional tropical moisture
  could get pulled northward around the middle of the week.
&&
.DISCUSSION...through Friday. Remnant moisture due to Mario still
remains in place over the region, but overall conditions have begun
to dry slightly. Dew points have dropped about 3-8 degrees over the
past 24-hours, but still remain about 150-200% of normal for this
time of year. Overall, we will continue to see some clouds this
afternoon along with an isolated shower over the higher terrain. The
probabilities of any thunderstorms will remain less than 10 percent,
with the greatest threat over northwest Arizona where some weak
instability remains in place. An area of low pressure off the
central California coast will drop south overnight and once again
tap into some tropical moisture. This will bring another increase in
moisture to mainly our far southern areas Sunday with PWATs rising
back to around 1.00-1.50". However, with lack of any forcing this
will mainly translate into increasing chances of light rain across
southern San Bernardino and southern Mohave counties Sunday. There
is some weak instability remaining over southern Mohave County so an
isolated thunderstorm can`t be ruled out.
By Tuesday, if the offshore low begins to move inland as most of the
clusters suggest, there could be another round of enhanced
thunderstorm chances, but exactly where this occurs would be highly
dependent on how far north or south the low is when it moves inland.
At this point, the models suggest another round of showers and
potential thunderstorms moving into western San Bernardino and Inyo
County late Tuesday into Wednesday, but with these cutoff lows,
confidence in the exact location remains uncertain.
&&
.AVIATION...For Harry Reid...For the 18Z Forecast Package...Winds
will be light and diurnal today, with speeds generally 8 kts or
less. Cannot rule out an occasional gust to 15 kts from the
southeast this afternoon. SCT aoa 12 kft expected over area
mountains this afternoon, but will clear out after sunset. Isolated
thunderstorms are possible this afternoon along the Peach Springs
corridor in northwest Arizona.
For the rest of southern Nevada, northwestern Arizona and
southeastern California...For the 18Z Forecast Package...Winds will
be light today following typical diurnal directional trends, with
speeds generally 8 kts or less. The exceptions will be KBIH, with
gusty south-southeast winds to 20 kts this afternoon and KDAG, with
breezy westerly winds after sunset between 8 and 12 kts. SCT aoa 12
kft on area mountains this afternoon, but will clear out after
sunset. Isolated thunderstorms are possible in northwest Arizona
this afternoon.
&&
.SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report
any significant weather or impacts according to standard operating
procedures.
&&
$$
DISCUSSION...Gorelow
AVIATION...Gorelow
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NWS VEF Office Area Forecast Discussion