Area Forecast Discussion
Issued by NWS Las Vegas, NV

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FXUS65 KVEF 220847

Area Forecast Discussion
National Weather Service Las Vegas NV
147 AM PDT Sun Apr 22 2018

.SYNOPSIS...Dry, quiet, and warm conditions are expected through
much of the upcoming week. Temperatures will reach their highest
levels of 2018 thus far.

.SHORT TERM...through Tuesday night. Weak low pressure over the Baja
was kicking high clouds over our area early this morning. These will
move away to the east this evening before another slug invades from
the northwest tomorrow. Still looking like mostly sunny days
overall, with temperatures rising to near 90F at KLAS today and a
degree or three above that Monday and Tuesday. Only other concern
through the period is the possibility of a stray thunderstorm over
the Sierra crest. Models have been hinting at slowly increasing
chances for afternoon and evening storms over the crest during the
period, and there was lightning over the crest north of our area
Saturday afternoon. With that said, confidence is too low to
forecast either measurable rain or dry thunder on any afternoon or
evening, but it will be something to watch.

.LONG TERM...Wednesday through Sunday.

Wednesday and Thursday will be characterized by above normal
temperatures, mostly dry conditions, and periods of breezy, south to
southwest winds. A few extra high clouds can be expected on
Wednesday as a weak impulse passes to our south. A closed low
centered off the northern California coast will slowly shift
eastward midweek which will gradually weaken the ridge over the
local area; creating potential for an isolated shower or two over
the southern Sierra on Thursday. Little has been changed to the
forecast for Friday and Saturday as long term models diverge with
the evolution of the closed low going into the weekend. The latest
GFS runs have the low passing directly over the area this weekend
while the ECMWF keeps the low tracking to our north across the Great
Basin. This leaves very different outcomes for the weather over the
local area so have only made small changes to the forecast. The main
change was to add low end precip changes to Esmeralda and northern
Inyo counties and increase wind speeds slightly areawide for Friday
and Saturday. Temps for the weekend will be highly dependent on how
this scenario unfolds.

.AVIATION...For McCarran...No significant winds or clouds expected
through at least Tuesday.

For the rest of southern Nevada, northwest Arizona and southeast
California...Expect no significant clouds and winds under 20 knots
at least through Tuesday.

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


LONG TERM....Guillet

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