896
FXUS65 KVEF 261138
AFDVEF

Area Forecast Discussion
National Weather Service Las Vegas NV
438 AM PDT Mon Oct 26 2026

.KEY MESSAGES...

* Quiet and seasonable weather conditions through at least Wednesday.

* Chances of precipitation and cooler temperatures return to the
  region late-week into the weekend.

&&

.DISCUSSION...Today through Sunday.

Zonal flow aloft maintains quiet weather and mild temperatures
through the first half of the week. Temperatures will be within a
few degrees of normal for late October, which means highs in the
upper 70s for Las Vegas, the mid 80s in the Colorado River Valley,
and the upper 60s in Owens Valley. A series of shortwaves will pass
through the northwestern United States over the next few days,
bringing breezy southerly to southwesterly winds to the southern
Great Basin on Monday, shifting to the Colorado River Valley and
northwestern Arizona on Tuesday and Wednesday.

Attention turns to a longwave trough and associated shortwaves that
will approach the west coast later this week. Southwesterly flow
along the edge of the trough will advect anomalous moisture into the
region, with PWATs upwards of 200 percent of normal for this time of
year by Friday. Given it is late October, this translates to PWATs
of around 0.80 inch or greater. The earliest precipitation chances
are on Friday morning in northwestern Arizona and parts of southern
Nevada with the initial, weaker shortwaves before spreading west
over the weekend. Current ensemble guidance suggests that the main
trough will move inland on Sunday, bringing an uptick in moisture
and precipitation chances to much of the area. Precipitation amounts
are highly dependent on the trajectory of the moisture and strength
of the low and more specific details regarding the timing and
location of impacts will become apparent throughout the week.
Continue to check the forecast as Halloween weekend gets closer.

&&

.AVIATION...For Harry Reid...For the 12Z Forecast Package...Winds
remain light through the TAF period. Expect variable wind directions
through the late morning before winds turn easterly, then southeast
into the afternoon. West-southest winds return into the early night
before becoming lighter and variable again in the mid morning. Skies
stay mostly clear through the TAF period with a few clouds around
25000 ft AGL passing through the area.

For the rest of southern Nevada, northwest Arizona and southeast
California...For the 12Z Forecast Package...Winds stay below 10 kts
through the TAF period. Winds directions will follow typical, daily
directional trends through the day. Winds for most areas become very
light into the late night and into Tuesday morning. as high-level
clouds build into the region from the west. Few to scattered clouds
around 25000 ft AGL will pass through the region through the day.

&&

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

&&

$$

DISCUSSION...Meltzer
AVIATION...Murdock

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