Area Forecast Discussion
Issued by NWS Las Vegas, NV

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FXUS65 KVEF 230941

Area Forecast Discussion
National Weather Service Las Vegas NV
240 AM PDT Mon Apr 23 2018

.SYNOPSIS...Dry and warm weather can be expected much of the week
with temperatures reaching their highest levels so far this season.
An area of low pressure is forecast to move over the southwest
states this coming weekend resulting in a modest cooling trend and
increasing winds.

.SHORT TERM...through Wednesday night.

Generally tranquil weather and above normal temperatures will hold
over the forecast area as a ridge slowly strengthens the next few
days. This ridge sets up between a quasi-stationary Eastern Pacific
closed low and a shortwave trough dropping down through the Northern
Intermountain Region and Rockies today and Tuesday. North-northeast
winds 15-25 mph are forecast to develop over south central Nevada
and near the southwest Utah border tonight and Tuesday morning then
again Tuesday night and Wednesday morning in response to
disturbances brushing Utah. These winds may push down the Overton
Arm of Lake Mead with speeds of 10-20 mph possible. Temperatures
will nudge up a degree or so each day with highs running around 10
degrees above normal.

.LONG TERM...Thursday through Monday.

On Thursday, the ridge stretching down the Great Basin will shift
eastward as a closed low offshore of northern California approaches
the coast. The effects of this will be isolated snow showers across
the higher elevations of the southern Sierra and breezy, south to
southwest winds Thursday afternoon and evening. Temps will remain
near 10 degrees above seasonal normals on Thursday. Unfortunately,
there is still little agreement Friday onward with the path and
strength of this closed low. However, there does seem to be at least
some agreement on winds increasing Friday through the weekend and
with the system remaining fairly moisture starved over the local
area which could only support isolated to scattered precip chances.
Current forecast has wind speeds of 15-25 mph gusting 25-35 mph each
afternoon and isolated shower chances across northern Inyo,
Esmeralda, and Nye counties for varying periods throughout the
weekend. There is low confidence in these wind speeds and timing and
location of precip. Temperatures show a downward trend over the
weekend but again confidence is low in how significant the drop in
temps will be each day.

.AVIATION...For McCarran...No significant weather expected for the
12Z TAF period. Light winds this morning will increase from the
southwest with gusts of 15-20 knots possible in the afternoon then
speeds will decrease below 10 knots in the evening and overnight

For the rest of southern Nevada, northwest Arizona and southeast
California...No significant weather is expected for the 12Z TAF
period. Moderate south-southwest winds gusting 15-20 knots will
develop this afternoon and evening across parts of southern Nevada
and the Mojave Desert Region before decreasing overnight. North-
northeast winds 15-25 knots will developing tonight and early
Tuesday morning across south central Nevada and near southwest Utah.

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


LONG TERM....Guillet

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