Area Forecast Discussion
Issued by NWS Las Vegas, NV

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FXUS65 KVEF 180301

Area Forecast Discussion
National Weather Service Las Vegas NV
700 PM PST Sat Feb 17 2018

.SYNOPSIS...Dry and warm conditions will continue through Sunday. A
potent weather system moving south out of the Pacific Northwest will
bring strong winds starting in most area Sunday afternoon and
continuing through Monday. Much colder temperatures can be expected
by Monday while snow showers are possible Sunday night and Monday
mainly across eastern Lincoln and northern Mohave Counties. Winds
will decrease by Tuesday, with chilly temperatures in place across
the region through mid-week.

.UPDATE...Its the calm before the storm this evening with mostly
clear skies dominating the region and light winds. Things will
change in a hurry tomorrow with gusty conditions developing over the
higher terrain by early Sunday morning, spreading across much of the
region during the late morning. Still anticipating a widespread wind
event for the region Sunday with some areas in the Mojave Desert and
Owens Valley seeing wind gusts exceeding 60 mph, along with
widespread blowing dust.

Current forecast is in good shape and no updates are planned this



.DISCUSSION...Tonight through Saturday.

No significant changes were made to the forecast this afternoon as
the models remain fairly consistent with a strong upper trough and
associated cold front moving into the area from the Pacific
Northwest Sunday through Monday night. The area will remain dry and
relatively warm through Sunday while strong west to southwest winds
develop by Sunday afternoon. The wind advisories and high wind
warnings issued early this morning still look good. There could be
isolated snow showers in far northwest Inyo County late Sunday but
precipitation chances will increase Sunday night and Monday,
especially across eastern Lincoln County and northern Mohave County
but also spreading into portions of southern Mohave County. We also
cannot rule out some light snow showers over the Clark County
mountains Monday. A few light snow showers may linger Monday night
in far eastern portions of Lincoln and Mohave Counties as the trough
axis moves into Utah and Arizona. For the most part, precipitation
amounts will be fairly light but the higher terrain in northeast
Lincoln County could pick up 3 to 6 inches of snow during the Sunday
night through Monday night time frame. Temperatures will drop
considerably Monday as a gusty north wind pushes in behind the cold
front and will be even cooler Tuesday with a northwest flow behind
the exiting trough. High temperatures Tuesday look to be about 15
degrees below normal. It still appears likely that at least portions
of the Las Vegas Valley will experience freezing temperatures both
Monday night and Tuesday night. Dry conditions and moderating
temperatures are expected Wednesday afternoon through Thursday under
a basically zonal flow. Confidence is low in the overall pattern for
Friday and Saturday but it looks like maybe more zonal flow or a
shallow trough. For now I kept the forecast dry with temperatures a
little below normal.

.AVIATION...For McCarran...Typical diurnal wind trends can be
expected tonight before southerly winds increase significantly
Sunday morning ahead of an approaching weather system. The strongest
winds can be expected Sunday afternoon and continue into early
Monday morning with gusts 35-45 KTS possible. VFR conditions are
expected through Sunday.

For the rest of southern Nevada, northwest Arizona and southeast
California...Winds will generally follow typical diurnal trends
across most terminals through tonight before increasing
significantly out of the southwest Sunday ahead of an approaching
weather system. Strong winds are expected across the region Sunday
afternoon through Monday morning. VFR conditions through Sunday.

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



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