477
FXUS65 KVEF 090328
AFDVEF

Area Forecast Discussion
National Weather Service Las Vegas NV
827 PM PDT Thu May 8 2025

.SYNOPSIS...Building high pressure will bring increasing
temperatures and dry conditions through the end of the week. The
next system arrives early next week, featuring cooler temperatures
and increasing winds.

&&

.UPDATE...Quiet weather this evening. No update planned.
&&

.PREV DISCUSSION...
350 PM PDT Thu May 8 2025

.DISCUSSION...through next Thursday.

Temperatures will continue to heat up as we head into the weekend
thanks to the upper-level ridge building over the Desert Southwest.
As these temperatures rise, we will also see HeatRisk rise.
Widespread Minor HeatRisk (Level 1 of 4) is expected across most of
our forecast area today and tomorrow with Moderate HeatRisk (Level 2
of 4) in Death Valley, the Colorado River Valley, and the lower
elevations of San Bernardino County. Moderate HeatRisk will affect
heat sensitive individuals (e.g., the elderly, infants and toddlers,
individuals with chronic illnesses, etc.), as well as those without
access to adequate cooling and/or hydration. HeatRisk will continue
to increase on Saturday with Major HeatRisk (Level 3 of 4) in Death
Valley and the Colorado River Valley, and Moderate HeatRisk
expanding to the lower elevations of southern Nevada, southeast
California, and northwest Arizona. Major HeatRisk will affect anyone
without effective cooling or adequate hydration, so if you have
outdoor plans on Saturday, make sure to take extra water/sports
drinks and take steps to protect yourself from the sun (e.g.,
sunscreen, sun glasses, hats, etc.). Outside of the heat, weather
through Saturday will be dry and mild with mostly sunny skies.

Temperatures will begin to drop and widespread gusty winds will
begin to pick up on Sunday as a trough pushes into the Pacific
Northwest. This low pressure system will dig south early next week,
prolonging the gusty winds and knocking temperatures down to around
8 to 12 degrees below normal by Tuesday. Given the dry nature of
this system, precipitation chances will be minimal and will be
limited to the southern Great Basin. The upper-level pattern will
remain trough-y through late next week with 500 mb heights slowly
rising, allowing for temperatures to recover to near normal during
the second half of the week.

&&

.AVIATION...For Harry Reid...For the 06Z Forecast Package...Light
winds following typical wind patterns are expected through Friday,
with a high probability (90%+) that winds will remain less than 8
knots.  Dry conditions will persist with only a FEW clouds around
12kft AGL over and near the mountains surrounding the valley
tomorrow afternoon and early evening.

For the rest of southern Nevada, northwest Arizona and southeast
California...For the 06Z Forecast Package...A light, diurnal wind
pattern will persist at most locations through Friday. KBIH will be
the exception where breezy southeast to south winds will increase
after 18Z tomorrow with a few gusts of  12 to 18 knots. Dry
conditions along with a FEW clouds 12kft to 15kft AGL near and over
the Sierra and higher terrain of southern Nevada are expected
through the TAF period.
&&

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

&&

$$

UPDATE...Morgan
DISCUSSION...Stessman
AVIATION...Gorelow

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