Area Forecast Discussion
Issued by NWS Las Vegas, NV

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FXUS65 KVEF 191216
AFDVEF

Area Forecast Discussion
National Weather Service Las Vegas NV
416 AM PST Mon Feb 19 2018

.SYNOPSIS...Breezy to locally windy conditions will continue today
as a cold front sweeps across the region. Isolated snow showers will
also be possible across Lincoln and northern Mohave counties. Much
colder air will filter into the region today through Wednesday
bringing well below normal temperatures for much of the week.
Periods of enhanced winds and chances for precipitation will return
late this week.
&&

.SHORT TERM...Today through Tuesday Night.

Windy conditions persist across much of the region early this
morning as a slow-moving cold front continues to sweep across the
region. As of 300 AM the front was just entering northern Clark
County. It isn`t expected to reach the southern CWA border until
this evening. Ahead of the front, southwest winds gusting 35-50 MPH
can be expected with 30-45 MPH gusts in its wake. The High Wind
Warnings for the Spring Mountains and Las Vegas Valley have been
replaced with Wind Advisories after 12z as winds begin to gradually
diminish. The warnings for NW San Bernardino County and the
Sierra/Owens Valley may need to be replaced with advisories or
cancelled altogether later this morning after the front exits to the
south. Sporadic gusts to around 60 MPH will be possible there until
that time.

Light radar returns have been noted across Lincoln and northern
Clark County early this morning. Quick rain/snow showers will be
possible with the front as it pushes south. Little accumulation is
expected, with the most significant totals (perhaps a Trace-2" of
snow) possible over populated areas of Lincoln and northern Mohave
counties.

The big story after the wind diminishes will be the cold air that
will continue to filter into the region through mid-week. This will
bring the coldest temperatures of the year, with widespread areas
seeing sub-freezing lows. A Hard Freeze Watch has been issued for
Monday night through Wednesday morning for southern Mohave County,
including the Kingman area, where overnight lows may dip into the
low 20s on Tuesday morning and perhaps lower by Wednesday.

.LONG TERM...Wednesday through Monday.

The cold temperatures in place will continue on Wednesday across
much of the area. The next in a series of shortwave troughs will
come through late Wednesday. This will do little more than to keep
temperatures cool until the next, stronger shortwave moves in
Thursday. This series of shortwaves will continue across the
region through Friday night. Models are in a bit of disagreement
on the timing of the waves, but it seems over the course of
Thursday and Friday, most areas will have a shot at some light
valley rain/mountain snow. The best chances will be in the higher
elevations and much of Lincoln County. At this time it appears any
accumulation will be minimal. The main trough of low pressure
should move out on Saturday, allowing temperatures to return to
near normal for this time of year.
&&

.AVIATION...For McCarran...Strong south to southwest winds remain
this morning and will slowly begin to diminish during the day.
Expect southerly wind of 20 to 30 KTS to shift to the west then
northwest during the late morning hours as a cold front moves
through the area.  Wind will diminish behind the front, gusting to
around 20 KTS. Any clouds today should remain AoA 10kft.

For the rest of southern Nevada, northwest Arizona and southeast
California...Strong morning west to southwesterly winds will
diminish through the day and shift to the north or northwest as
a cold front moves through today. Any clouds will be AoA 10kft.
Lighter winds are expected for Tuesday across the area.
&&

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

$$

SHORT TERM...........Wolcott
LONG TERM/AVIATION...Berc

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