Winchester, Nevada Weather Forecast Discussion

525
FXUS65 KVEF 081148
AFDVEF
Area Forecast Discussion
National Weather Service Las Vegas NV
448 AM PDT Mon Sep 8 2025
.KEY MESSAGES...
* Dense smoke and poor air quality to continue through the morning
  hours in the northern Owens Valley, and may reoccur the next few
  nights.
* A Pacific trough brings cooler, drier, and windier conditions
  this week.
&&
.DISCUSSION...through Sunday.
Area webcams show the dense wildfire smoke that settled into the
northern Owens Valley this evening. Visibility at the Bishop Airport
has ranged between 1-2 miles all night. Meanwhile, air quality
sensors depict unhealthy air quality in the area. These conditions
are likely to persist through the morning hours. By the afternoon,
surface heating and increased winds should help mix out and disperse
some of the smoke, but it may return again in the evening and
subsequent evenings. Behavior of the Garnet Fire will dictate the
severity of smoke.
Otherwise, the main weather of note will be the seasonably pleasant
conditions expected this week thanks to a Pacific trough pushing
into the region. Southwest breezes have already begun to scour out
moisture and precipitation chances, and that continues today with
PoPs limited to Mohave County and only ~10%. Beyond that, the only
notable precipitation chances (10-30%) reside in the Sierra and our
NW zones due to the trough itself. For the rest of the area,
expecting dry conditions and gusty southwest winds of 20-40 mph this
week. Temperatures across the area gradually decrease through
Thursday, eventually falling 8-12 degrees below normal. As we head
into the weekend, temperatures rebound slightly while quieter
conditions return.
&&
.AVIATION...For Harry Reid...For the 12Z Forecast
Package...Southwesterly winds are expected for a majority of the
forecast period, with sustained speeds increasing to 10-15KT this
afternoon, with gusts to 20-25KT through early evening. Gusts
diminish overnight, with another round of gusts expected to
develop by mid morning Tuesday. VFR conditions prevail with
temperatures remaining just below 100 degrees.
For the rest of southern Nevada, northwest Arizona and southeast
California...For the 12Z Forecast Package...Light and variable
winds early this morning will settle out of the southwest by
early afternoon, with gusts to 20-25KT common across the region.
Across the western Mojave Desert, winds maintain more of a
westerly direction through the forecast period, with at least
intermittent gusts to around 25kt expected. Gusts largely diminish
after sunset, with wind speeds around 10KT or less overnight.
Through central and northern Inyo County, including the Owens
Valley, wildfire smoke remains a significant concern. Expect
MVFR/IFR conditions due to smoke this morning until gusty up-
valley winds develop this afternoon, providing some reprieve
before northerly winds this evening once again allow smoke to
settle into the Valley. Elsewhere, VFR conditions prevail.
&&
.SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report
any significant weather or impacts according to standard operating
procedures.
&&
$$
DISCUSSION...Woods
AVIATION...Phillipson
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NWS VEF Office Area Forecast Discussion