Area Forecast Discussion
Issued by NWS Reno, NV

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FXUS65 KREV 182044
AFDREV

Area Forecast Discussion
National Weather Service Reno NV
144 PM PDT Wed Sep 18 2019

.SYNOPSIS...

Another low pressure system will bring gusty winds today but the
winds are not expected to be as strong compared to Monday`s storm.
Temperatures will be well below average into the start of the
weekend, with light rain and high elevation snow showers also
possible through Thursday afternoon. Dry conditions return for the
weekend with a warming trend, then breezy winds by Sunday.

&&

.DISCUSSION...

It`s that time of the year for weather variability! Gotta love
the transition seasons. Here`s an overview of what to plan for
over the next week or so: colder than usual temperatures, some
breezy conditions, rain and high elevation snow showers and even
the slightest bit of potential for light snow showers to valley
floors by early next week. Yea, I know, it`s September.

Rest of Today: The cold front is tracking through the US 395
corridor with breezy conditions ahead of and along the front
(gusts around 40 mph) and also some rain and high elevation snow
showers. This will be similar to the front a couple of days ago,
but with less on the windy side of things. Choppy lake conditions
are expected with Lake Wind Advisories in effect for both Tahoe
and Pyramid lakes. There will likely be some light snow
accumulations for locations around 8000 feet and higher. Wet roads
will be slick, so remember to slow down in rain and snow. High-
res simulations are also showing the potential for some
thunderstorms late this afternoon/evening for areas north of
Susanville and Pyramid Lake too. Rainfall amounts around 0.25"
will be possible, with locally up to 0.50" in heavier bands.
Elsewhere, rainfall amounts will be lighter, with generally 0.10"
around the Tahoe basin and near the Sierra crest, and only trace
amounts to a few hundredths across the remainder of western Nevada
and Mono County away from the crest.

Thursday: Brisk northerly flow will prevail behind the front as well
as the potential for showers across much of western Nevada along
with some upslope showers from the Tahoe Basin southward. Well
below normal temperatures with 60s across western Nevada and mid
to upper 50s for Sierra valleys.

Friday and Saturday: Drier and slightly warmer conditions are
forecast as brief ridging establishes across the region. Highs
increase back to the low 70s for western Nevada valleys and mid
60s for Sierra valleys.

Sunday into early next week: The threat of precipitation returns for
Sunday night into Monday as another trough approaches the area. The
trough tracks southeastward Sunday night into Monday across the
Great Basin. While the exact track and depth of the trough may
change, there are widespread chances for showers for now, with the
best chances north of Susanville and Lovelock. Temperatures will
also remain cooler during this time. There remains a bit of
uncertainty with the remainder of next week as simulations are
struggling with how to handle the exit of the trough. Simulations
are attempting to build up the eastern Pacific ridge, so we will see
how that influences the storm track and precipitation chances
through the end of next week. -Edan

&&

.AVIATION...

A cold front will move across northeastern CA and western NV this
afternoon, which will spread -SHRA across the region through
Thursday afternoon. Some isolated thunderstorms are also possible
north of Interstate 80 this afternoon. Moderate rainfall and
erratic winds are possible within any showers, which could reduce
visibility and cause mountain obscurations.

Light-to-moderate icing conditions are also possible within/near any
showers along the Sierra Nevada. Mountain wave induced turbulence
and LLWS are also possible near and east of the Sierra Nevada this
afternoon through 06Z as the front progresses southeastward across
NV.

Expect conditions to improve Friday through Saturday, before another
weather system affects the region Sunday. -Johnston

&&

.REV Watches/Warnings/Advisories...
NV...Lake Wind Advisory until 8 PM PDT this evening for Pyramid Lake
     in NVZ004.

     Lake Wind Advisory until 8 PM PDT this evening for Lake Tahoe in
     NVZ002.

CA...Lake Wind Advisory until 8 PM PDT this evening for Lake Tahoe in
     CAZ072.

&&

$$

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


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