137
FXUS65 KVEF 072039
AFDVEF

Area Forecast Discussion
National Weather Service Las Vegas NV
139 PM PDT Mon Apr 7 2025

.SYNOPSIS...Temperatures across the region will climb above normal
today with the warming trend continuing through midweek. Dry
conditions will prevail as well thanks to the ridge of high
pressure building over the Western US. Winds will pick up across
the western Mojave Desert and southern Great Basin today with
lighter winds returning on Tuesday and Wednesday.

&&

.DISCUSSION...through next Monday.

Current satellite imagery shows a shortwave trough pushing into the
Pacific Northwest. As this shortwave moves through the Pacific
Northwest we will see breezy southwesterly winds pick up this
afternoon and evening. Outside of these breezes, high clouds
filtering through the region will be the only other evidence of this
shortwave. Even with this shortwave passing through to our north and
flattening the upper-level ridge, we will still see warmer than
normal temperatures across the region today. Out upper-level ridge
will rebound through the end of the week, allowing for our warming
trend to continue with temperatures warming to 10+ degrees above
normal by Wednesday and 15+ degrees above normal by Friday. As we
see these temperatures increase, we will also see HeatRisk return to
the region with Minor HeatRisk (Level 1 of 4) across most of our
forecast area and Moderate HeatRisk (Level 2 of 4) in Death Valley,
the Colorado River Valley, and lower elevations/valleys of southern
San Bernardino County. Moderate HeatRisk will affect those without
adequate access to cooling or hydration as well as those who have
not had the chance to acclimate to these temperatures. As such, make
sure you stay hydrated and protect yourself from the sun if you have
outdoor plans during the second half of the week.

Our warming trend will come to an end on Saturday with temperatures
cooling a few degrees as a trough approaches the West Coast,
displacing the ridge off to our east. Uncertainty persists regarding
the speed at which this trough will move through the region and how
strong it will be when it does. However, it (uncertainty) is slowly
decreasing as the ECMWF ensemble mean and its GFS counterpart are
beginning to converge on a common solution. Right now both mean
solutions have a shortwave trough moving through the Pacific
Northwest and Great Basin over the weekend. Southwesterly winds will
pick up across the region as this system approaches the region on
Friday, with winds remaining elevated through the weekend. In
addition to winds, we will also see temperatures cooling a few
degrees each day over the weekend and into next week.

&&

.AVIATION...For Harry Reid...For the 18Z Forecast Package...Light
easterly or variable winds persist through mid-afternoon with speeds
likely (80%) below 10 knots. Between 21z and 00z, winds are expected
to shift to the southwest with speeds ~10 knots and gusts up to 20
knots. Gusts should become infrequent or cease altogether after
sunset, but sustained winds of 6-12 knots persist from the southwest
overnight. Scattered to broken clouds at or above 20kft.

For the rest of southern Nevada, northwest Arizona and southeast
California...For the 18Z Forecast Package...Light and diurnal or
variable winds continue through the morning hours. This afternoon,
breezy south/southwest winds develop across the region. Gusts of 15-
25 knots expected in most locations, with the strongest winds at
DAG. Gusts wane this evening but breezes generally remain elevated
overnight from the southwest. The exception to this BIH which is
forecast to turn northerly after sunset. VFR conditions prevail with
scattered to broken clouds at or above 15kft.

&&

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

&&

$$

DISCUSSION...Stessman
AVIATION...Woods

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