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fxus65 kvef 191240 cca 

Area forecast discussion
National Weather Service Las Vegas Nevada
218 am PDT Thu Sep 19 2019

Synopsis...a storm system will pass across northern Nevada today
and tonight bringing gusty winds to the area today and a slight
chance of showers and thunderstorms to southcentral Nevada. Quiet
weather follows Friday and over the weekend before another system
drops out of the Pacific northwest bringing more wind, slightly
cooler temperatures and better, more widespread chances for
precipitation on Monday. More unsettled weather is possible late
next week.

Discussion...Thursday through Wednesday.

Low pressure will move across northern Nevada today and tonight
resulting in gusty winds across the area and slight chances for
showers and thunderstorms over portions of Esmeralda, central Nye
and Lincoln counties. Temperatures in the northern forecast areas
will be 10-15 degrees cooler today than what was reported
yesterday with less cooling (3-5 degrees) across the deserts. The
system moves into the northern rockies/plains on Friday with
troughing transitioning to shortwave ridging Friday and over the
weekend. Temperatures will rebound over the weekend becoming more
seasonal by Sunday.

The next upstream system drops out of the Gulf of Alaska into the
Pacific northwest Sunday afternoon with a closed low forecast
directly over our area Monday. This system is expected to bring
increasing winds and a better chance of seeing more widespread
shower activity. The low slowly moves to the southeast, centering
over southwest Arizona on Tuesday with little movement forecast
for Wednesday as the low center remains over Arizona. Expect below
normal temperatures Monday through Wednesday...generally a 5-8
degree drop from Sunday. With the low remaining just to our east,
shower activity will be possible Tuesday and Wednesday primarily
over the southeastern County Warning Area.

Fire weather...winds are gusting up to 25 mph this morning along
the Sierra east slopes and in the Owens Valley, well below red
flag critieria so I see no problem in letting the current warning
expire at 5 am. Low relative humidity and increasing wind is forecast over
Mohave County this afternoon leading to red flag conditions and a
red flag warning will go into effect at 11 am there.

Aviation...for McCarran...gusty south to southwest winds will
continue through this evening, peaking this afternoon with gusts
around 25 knots. A wind shift to northwesterly is expected
overnight into early Friday morning, followed by much lighter
winds Friday afternoon. No operationally significant clouds are
expected through the period.

For the rest of southern Nevada, northwest Arizona and southeast
California...a cold front was moving southward over the southern
Great Basin early this morning, with north to northwest winds
gusting 20 to 30 knots expected behind it today, while south to
southwest winds gusting 20 to 30 knots persist over the Mojave
Desert. The front will bring northerly winds to much of the Mojave
Desert by Friday morning, with speeds decreasing. No operationally
significant clouds are expected through the period.

Spotter information statement...spotters are encouraged to report
any significant weather or impacts according to Standard operating



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