FXUS65 KVEF 181729
AFDVEF

Area Forecast Discussion
National Weather Service Las Vegas NV
1029 AM PDT Mon May 18 2026

.KEY MESSAGES...

* Today's weather includes cool temperatures and decreasing winds
  before a warming trend takes place through the rest of the week.

&&

.DISCUSSION...through Sunday.

The trough responsible for yesterday's winds is centered over the 
Nevada-Utah state line as of midnight PDT/MST and will continue to 
move east this morning. Wind speeds will decrease areawide in 
response. Wind Advisories and High Wind Warnings remain in effect 
until 5 AM PST/MST this morning for most locations. Northerly winds 
remain in the Colorado River Valley this morning with gusts between 
30 and 40 mph, which will bring waves of 2 to 4 feet on area lakes. 
A High Wind Warning will continue until 11 AM PDT/MST, but these 
winds will weaken in the afternoon. Also of interest is notably 
cooler temperatures today, with highs 10 to 15 degrees below normal 
for mid-May. This means highs in the upper 70s to low 80s for the 
Mojave Desert Valleys including Las Vegas and highs in the 60s to 
low 70s in the southern Great Basin and Owens Valley. However, these 
unseasonably cool temperatures will be short lived as high pressure 
rebuilds over the West Coast throughout the week. Highs return to 
near normal values by Wednesday and climb to 5 to 10 degrees above 
normal by Friday, lasting through the weekend.

&&

.AVIATION...For Harry Reid...For the 18Z Forecast Package...Gusty
northeasterly winds (with directional variability between 020-050
true) will continue into this afternoon, with gusts to around 
20-25KT expected on at least an intermittent basis. Gusts are 
expected to diminish by mid-afternoon, with sustained speeds 
dropping to around 10KT. Winds back to the north late evening and 
to the northwest overnight, before shifting to the north and 
northeast again on Tuesday morning. Another round of gusty 
northeasterly winds is expected mid-morning through early to mid- 
afternoon Tuesday, though slightly weaker than today, with gusts 
expected to top out around 20KT. VFR conditions with clear skies 
will prevail.


For the rest of southern Nevada, northwest Arizona and southeast
California...For the 18Z Forecast Package...Gusty northerly to
northeasterly winds are expected across the area through this 
afternoon, with gusts to 20-25KT common for most locations outside
of the Lower Colorado River Valley. There, from roughly KIFP to 
KEED, terrain-enhanced northerly winds will gust to around 35KT 
through late afternoon, slowly decreasing through the evening. 
Elsewhere, gusts will largely diminish after sunset, with elevated
and gusty northerly to northeasterly winds returning across 
southern Nevada and northwestern Arizona by mid-morning Tuesday. 
VFR conditions will prevail, with only a FEW high clouds late in 
the period across far southern areas.

&&

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

&&

$$

DISCUSSION...Meltzer
AVIATION...Phillipson

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