Area Forecast Discussion
Issued by NWS Las Vegas, NV

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FXUS65 KVEF 231959

Area Forecast Discussion
National Weather Service Las Vegas NV
1259 PM 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...Today through Wednesday Night.

Little change to the short term forecast this afternoon. Quiescent
and warm conditions will continue through the period. As mentioned
by the previous shift, disturbances well to the north will result in
some enhanced northerly flow (15-25 MPH) through Lincoln County down
to Lake Mead Tuesday into early Wednesday. Temperatures will remain
well above normal, hovering in the low 90s in Las Vegas and around
the century mark in Death Valley and along the Colorado River
Valley. With little convective activity noted over the Sierra
yesterday, I opted to keep the forecast dry for now.

.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...Light winds will continue until breezy
southwest winds push through the Las Vegas Valley by 21-22Z this
afternoon. Expect SW winds of 10-14 kts with gusts up to 15-20 kts
this afternoon. Southwest winds will decrease overnight and should
remain below 11 kts before becoming light and variable early
tomorrow morning. Light diurnal winds expected through tomorrow
afternoon. No operationally significant clouds or weather expected
through Tuesday.

For the rest of southern Nevada, northwest Arizona and southeast
California...Increasing southwest winds this afternoon mainly
remaining below 20 kts. North-northeast winds 15-25 knots will
develop tonight and early Tuesday morning across south-central
Nevada and near southwest Utah. No operationally significant clouds
or weather expected through Tuesday.

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


SHORT TERM...Wolcott
LONG TERM....Guillet

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