Area Forecast Discussion
Issued by NWS Las Vegas, NV

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FXUS65 KVEF 241705

Area Forecast Discussion
National Weather Service Las Vegas NV
1005 AM PDT Sat Mar 24 2018

.SYNOPSIS...The next low pressure system will sweep across the
Great Basin this weekend leading to strong winds in the East
Sierra and across the Mojave Desert. Temperatures will drop below
normal early next week as a cold front moves through the region on
Sunday. A warming trend is forecast late next week as tranquil
conditions return to the southern Great Basin and Mojave Desert.

.UPDATE...Winds slowly developing across the area this morning. The
advisories look good and continue to expect the strongest winds in
the Spring Mountains this afternoon and evening. A band of thick
cirrus stretching across Lincoln, Clark, San Bernardino and Mohave
Counties. I updated cloud cover for the morning and early afternoon.
The band is slowly thinning and expect some sunshine to break
through by early to mid afternoon where it is currently overcast. No
other updates anticipated.

230 AM PDT Sat Mar 24 2018

.SHORT TERM...through Monday night.

Models in good agreement with evolution of synoptic scale features
during the period. Currently, water vapor show a shortwave ejecting
inland over southern Oregon/northern California ahead of parent low
over the northeast Pacific. This low is progged to weaken as it
moves inland across northern Nevada Sunday. Meanwhile, additional
shortwave energy digging down backside of trough through southern
California is progged to form an upper low over Arizona by Tuesday
morning. Main impact from this system will be winds and cooler
temperatures. Won`t expand on our current wind advisory as model
output supports strongest winds across the Spring Mountains/Red Rock
Canyon and the western Mojave Desert. North breezes develop Sunday
night-Monday ushering in the cooler temperatures. Any precipitation
from this system will be light and primarily occur near the southern
Sierra Crest and northern Lincoln County on Sunday. As the low
starts to develop over Arizona can not rule out a slight chance over
the higher terrain of eastern Mohave County Monday.

.LONG TERM...Tuesday through Friday.

A change in the weather pattern will bring much warmer conditions to
the area late next week with temperatures steadily increasing
through the week. Tuesday will be 5 or so degrees below normal with
a warming trend bringing temperatures of 8-10 degrees above normal
on Friday. If the official Las Vegas temperature reaches or exceeds
the forecasted high of 80 degrees on Friday, it would not only be
the first 80 degree day in 2018 but the first time Vegas has reached
80 degrees since Thanksgiving Day last year. In addition to the
warmer weather, expect mostly clear and dry conditions across the
region through much of the week with breezy north winds Tuesday and
Wednesday...with gusty north winds lingering along the Colorado
River Valley into Thursday.

.AVIATION...For McCarran...South winds around 10 knots
steadily increasing today to 10-15 knots with gusts to 25 knots
after 15Z and 20-25 knots with gusts to 35 knots by mid afternoon.
Otherwise expect periods of denser high clouds above 20k feet and
VFR conditions through the TAF period.

For the rest of southern Nevada, northwest Arizona and southeast
California...South to southwest winds will continue through the
early morning hours with strong winds across the higher elevations
of the southern Sierra. Winds will increase across the deserts by
mid morning with the strongest winds expected across the western
Mojave Desert. A belt of southwest winds stretching from San
Bernardino County across Clark, Lincoln, and Mohave counties will
strengthen this afternoon with speeds of 20-25 knots gusting 30-35
knots. Higher winds are expected across the western Mojave Desert at
KDAG and in the Spring Mountains of Clark County where gusts over 40
knots are likely.

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


Short Term...Pierce
Long Term/Aviation...Salmen

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