717
FXUS65 KVEF 231000
AFDVEF

Area Forecast Discussion
National Weather Service Las Vegas NV
200 AM PST Sun Feb 23 2025

.SYNOPSIS...Strong high pressure will build over the region
through early next week, with afternoon high temperatures climbing
10 to 15 degrees above normal by Monday and Tuesday. Temperatures
will cool slightly midweek onward as a weak weather system moves
through, but will remain above normal with breezy conditions and
dry weather persisting through the end of the week.

&&

.SHORT TERM...through Tuesday.

Low amplitude ridge remains the key player across the region this
evening, deflecting the Pacific storm track northward across the
Pacific Northwest. This does leave our region vulnerable to
periods of high cloud cover, mainly across our northern zones,
while remaining dry and mild otherwise.

The big story through Tuesday will be the warming trend expected,
thanks to the above normal heights that have built across the
region and the influx of mild air off the Pacific. This mild air
will feature 850mb temp anomalies of 8-10C above normal, and will
translate to some very mild afternoon high temperatures running
10 to 15 degrees above normal by Monday and Tuesday. A weak
backdoor front moving through Tuesday afternoon may also provide
some modest mixing enhancement as surface winds increase, which
should result in the warmest temperatures of the week occuring.

.LONG TERM...Wednesday through Saturday.

Ridge over the western US will persist through Wednesday, but a
trough over the eastern Pacific will approach the coast which will
help weaken the ridge. This trough will split into two parts with
one, weak piece of energy passing through the PacNW while the
second piece forms a closed low off the southern CA coast
Thursday. At this point, the models are in good agreement that the
low will pass through northern Baja Friday and across southern
Arizona Saturday. Another thing that the models agree on is the
lack of moisture. PWs remain very low and probabilities of seeing
at least a hundredth of an inch. Temperatures will likely get
knocked down a couple of degrees, but that is really the main
impact from this low. Another system does approach the coast over
the weekend which has a better potential of bringing increased
precipitation chances along with cooler temperatures, especially
across the Sierra and central and northern Nevada.

&&

.AVIATION...For Harry Reid...For the 12Z Forecast Package...Light
diurnal winds of 7 kts or less expected through the period. A few
passing high clouds will give way to clear skies this evening.

For the rest of southern Nevada, northwest Arizona and southeast
California...For the 12Z Forecast Package...Light diurnal winds of
10 knots or less to persist at most terminals through the period.
The one exception will be KIFP, where the northerly wind direction
will enable a few gusts of 15 to 20 knots today. Otherwise, VFR
conditions can be expected with a few passing high clouds through
this evening.

&&

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

&&

$$

SHORT TERM...Outler
LONG TERM...Gorelow
AVIATION...Austin

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