527
FXUS65 KVEF 220455
AFDVEF

Area Forecast Discussion
National Weather Service Las Vegas NV
955 PM PDT Sun Jun 21 2026

.KEY MESSAGES...

* Temperatures will continue to climb heading into the work week,
  with afternoon highs peaking Tuesday through Thursday.

* Slight chances of isolated showers and thunderstorms mid-to-late
  week as monsoonal moisture creeps northward.

* Increasing winds and low RH values late in the week.

&&


.DISCUSSION...Today through Saturday.

High pressure will build into the area from the south over the next
couple of days and temperatures will trend upward as a result.
Temperatures will peak Tuesday through Thursday, with afternoon
highs 6 to 8 degrees above seasonal normals. Expect widespread
Moderate Heat Risk (Level 2 of 4), with pockets of Major Heat Risk
in the lower desert valleys including Death Valley, the Las Vegas
Valley, and the Colorado River Valley.

As the center of high pressure shifts into southern New Mexico on
Tuesday, this will allow for southerly flow to increase moisture up
the Colorado River Valley beginning on Tuesday and continuing into
Wednesday. The latest EPS mean brings values of 1" of PWAT into Lake
Havasu on Tuesday evening and the 1" line into the Las Vegas Valley
around mid day on Wednesday. Isolated showers/t-storms are possible
(

NWS Las Vegas (VEF) Office