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FXUS65 KVEF 171624
AFDVEF

Area Forecast Discussion
National Weather Service Las Vegas NV
824 AM PST Sun Dec 17 2017

.SYNOPSIS...Gusty north winds and slightly cooler temperatures can
be expected today before a warming trend begins Monday and
accelerates Tuesday under high pressure. Another cold front is
expected to bring strong north winds and cooler temperatures on
Thursday.
&&

.UPDATE...Made a minor tweak to morning sky grids to reflect current
trends. No other updates needed at this time.
&&

.PREV DISCUSSION...
304 AM PST Sun Dec 17 2017

.SHORT TERM...Today through Tuesday night.

A band of clouds associated with an exiting trough extended across
generally the southeast half of the forecast area early this
morning. This area of cloud cover will gradually decrease throughout
the day as the trough continues to move east of the area. Otherwise,
areas of gusty northerly winds will linger much of the day before
decreasing late this afternoon. A wind advisory remains in effect
for the Owens Valley, Death Valley southern Nye and western Clark
Counties until 4 pm. Temperatures will generally cool a little bit
today. High pressure will gradually push east from the California
coast Monday to Nevada by Tuesday with dry conditions, mainly light
winds and warming temperatures.

.LONG TERM...Wednesday through Saturday.

Not much change in the long term as the next system is approaching
the area by Wednesday. Expect above average temperatures with
breezes increasing by Wednesday afternoon and evening.

Models have come into better agreement with the next system, cutting
from northern California over to the four corners on Thursday. This
will drag a cold front across the area, bringing much cooler
temperatures - likely 10 or more degrees cooler than Wednesday - and
gusty north winds to the region. Precipitation chances look fairly
minimal as the system is now forecast to remain progressive and
quickly exit the area. The upper-level ridge axis looks to remain
off shore for the remainder of the period, leaving north to
northwest flow over the area with cooler temperatures.

.AVIATION...For McCarran...North winds generally gusting around 25
kts will persist this morning then gradually decrease in the
afternoon. Clouds will gradually decrease this morning. Light winds
following typical diurnal trends are expected overnight tonight
through Monday.

For the rest of southern Nevada, northwest Arizona and southeast
California...Gusty north winds will persist across most regional
airports today, gradually decreasing during the afternoon. Most
areas will still see north to northeast winds tonight and Monday but
speeds will be lighter. Clouds will gradually clear this morning.

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

$$

Update...Morgan
Short Term/Aviation...Harrison
Long Term...Steele

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