276
FXUS65 KVEF 010845
AFDVEF

Area Forecast Discussion
National Weather Service Las Vegas NV
145 AM PDT Sat Jun 1 2024

.SYNOPSIS...Broad area of low pressure across the region will
aid in the development of gusty south to southwest winds today and
Sunday. By the middle of next week, expect well above-average
temperatures for the first full week of Meteorological Summer.

&&

.DISCUSSION...Today through next Friday.

Skies are clear across the southern Great Basin and Mojave Desert
early this morning. Leading edge of one shortwave trough can be seen
moving into western Washington. This system will aid in the
development of stronger south to southwest winds today and tomorrow
and actually trim a few degrees off our temperatures. There is a
stronger shortwave trough that reaches western Washington early
Monday morning. For early June, this wave is associated with an
impressive atmospheric river which will bring heavy rain to western
Oregon and Washington. For our area, all that moisture will only
translate to an extensive area of cloud cover sagging south over the
area Monday afternoon and Monday night. The cloud cover will begin
to thin out Tuesday as high pressure starts building in from the
west.

First crack at excessively hot temperatures for the region comes
Wednesday and Thursday as heights continue to rise across the
Intermountain West. High temperatures will be running around 10
degrees above normal, and will be at or close to records. As the
heat builds, especially in urban areas there will be little relief
during the overnights. Latest temperature probability data has a 38%
chance of Las Vegas hitting 110 degrees Thursday. The earliest date
Las Vegas has hit 110 degrees is June 6th.

Major HeatRisk on Wednesday is not as widespread as Thursday, while
some areas of the Las Vegas Valley and Death Valley NP increase into
the Extreme HeatRisk category Thursday. Am going to issue an
Excessive Heat Watch for Wednesday and Thursday.

Less confidence in just how hot temperatures will by on Friday. The
closed low in the vicinity of the Baja Peninsula is forecast to
start lifting north into southern California. More cloud cover and a
low probability of thunderstorms over the higher terrain may just be
enough to start suppressing the temperatures.

&&

.FIRE WEATHER...Gusty south to southwest winds of 25 to 35 mph will
occur across the area today, on Sunday expect slightly weaker winds.
An area of extensive clouds will work south across the area Monday
before starting to thin on Tuesday. Hot conditions will occur
Wednesday and Thursday

&&

.AVIATION...For Harry Reid...Light and variable winds this morning
should quickly come around to south-southwest (170-210) by 18Z and
remain in that general direction into tonight. Sustained wind speeds
will increase to above 10kts once the switch to the south occurs,
and occasional gusts to 25kts will be possible into the evening.
Speeds will gradually diminish after sunset, but occasional gusts to
20kts will remain possible through midnight. Similar conditions are
likely on Sunday, with light and erratic winds through the morning,
followed by breezy southerly winds in the afternoon. VFR conditions
will prevail through Sunday with no operationally significant clouds
or weather expected.

For the rest of southern Nevada, northwest Arizona and southeast
California...Winds across most of the region will favor south to
southwest directions today, with gusts to around 20kts possible
during the afternoon and early evening. Winds in the Owens Valley,
including KBIH, will differ from this with directions remaining
northerly into the afternoon before turning westerly for a few hours
after 23Z. Winds will also be stronger at KDAG, with gusts to 30kts
likely after 00Z and persisting into Sunday morning. Similar
conditions are expected at area TAF sites on Sunday. VFR conditions
will prevail through Sunday with no operationally significant clouds
or weather expected.

&&

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

&&

$$

DISCUSSION...Pierce
AVIATION...Planz

For more forecast information...see us on our webpage:
https://weather.gov/lasvegas or follow us on Facebook and Twitter