Area Forecast Discussion
Issued by NWS Reno, NV

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000
FXUS65 KREV 192126
AFDREV

Area Forecast Discussion
National Weather Service Reno NV
226 PM PDT Thu Apr 19 2018

.SYNOPSIS...

A weak storm system will bring light rain and snow showers through
this evening with cold temperatures. Much warmer temperatures
will quickly return for the upcoming weekend through early next
week, with dry conditions prevailing.


&&

.SHORT TERM...

Isolated to scattered rain and snow showers continue across the
area through this evening as we remain underneath cold low
pressure. Instability will also bring snow pellet showers mixed
in as well. Heavier showers could produce localized light
accumulations and slick road conditions, especially over higher
terrain.

Breezy north winds remain through the evening as well, with gusts
up to 25-30 mph. The Lake Wind Advisory for Pyramid Lake has been
cancelled for the rest of today, as winds are expected to
continue to diminish through the evening.

High pressure builds back over CA/NV tomorrow with warming
temperatures and lighter winds. Temperatures will rebound on
Friday into the 60s and warm up even more on Saturday with
mid/upper 70s across western Nevada and northeast CA with 60s in
the Sierra valleys. Temperatures this weekend will be nearly 15
degrees above normal for this time of year. A fast moving
shortwave moves across the region on Sunday bringing increased
clouds and winds for Sunday afternoon. There is a slight chance
we could see a few isolated showers and even a thunderstorm north
of Susanville on Sunday afternoon and carrying into far northern
Nevada by Sunday evening. -Hoon

.LONG TERM...Monday through Thursday...

Well above average temperatures will persist through the long term
forecast, with highs remaining in the 60s to near 70 for Sierra
valleys and the 70s to perhaps even low 80s for the valleys of
western and west-central Nevada.

As far as precipitation chances, Monday looks dry as an upper ridge
builds overhead behind a system exiting to the east early Monday
morning. By Tuesday afternoon and evening, the well above average
temperatures (more like what is typical mid-late May) will combine
with fairly cool mid-level temperatures to promote cumulus
development in and near the Sierra, with a few showers or even very
isolated weak thunderstorms possible.

Wednesday and Thursday, simulations start to vary a good deal as to
where an upper low off the California coast winds up. Some
simulations have the low just off the coast, while others have it
several hundred miles off the coast (near or west of 130W longitude).
The position will largely determine where the best divergence aloft
to promote showers (mainly afternoon-evening) ends up. For now, the
forecast tries to thread the differences by putting a low chance for
showers and thunderstorms mainly near the Sierra and across
northeast California; however, as a very low confidence nod to the
far eastern simulations (divergence would extend into central NV) a
slight chance was allowed to creep out into Mineral County Thursday.
-Snyder

&&

.AVIATION...

Isolated to scattered showers remain over the region through this
evening. These showers will bring periods of mainly MVFR
conditions to area terminals with snow pellets likely in the
heavier showers. Low pressure moves out of the region tonight with
lighter winds and clearing skies for Friday. There is a slight
chance of morning fog Saturday and Sunday morning around KTRK.
-Hoon

&&

.REV Watches/Warnings/Advisories...
NV...None.

CA...None.
&&

$$

For more information from the National Weather Service visit...
http://weather.gov/reno



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