Area Forecast Discussion
Issued by NWS Reno, NV

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FXUS65 KREV 242047

Area Forecast Discussion
National Weather Service Reno NV
147 PM PDT Sat Mar 24 2018


Snow showers, more widespread across northeast California and in
the Sierra, could bring light snowfall accumulations along with
periodic travel concerns for the Tahoe Basin and northeast
California into Sunday morning. Isolated to scattered snow showers
are also possible into Sunday for western Nevada and Mono County,
but accumulations will be limited to areas mainly above 5500 feet. Drier
weather returns next week, with much warmer temperatures by mid
to late next week.



Snow showers are more widespread late this afternoon from
Sierraville south through the Tahoe basin and into Mono County
near the crest. A few showers are making their way into western
Nevada. The main forcing is upslope flow...but the leading edge of
the next short wave trough is close enough to keep the showers
going into western Nevada. Accumulations have been limited below
5500 feet due to the warming of the ground surfaces at the lower

The main upper level low moves closer to area this evening then
passes through Sunday. As this low approaches there should be an
uptick in the forcing...but there is a limited supply of moisture
to work with. The best combination of forcing and moisture will
exist from the Tahoe area north into northeast California where
winter weather advisories are still in place. We could see another
2 to 4 inches at lake level with up to 8 inches in the higher
elevations this evening and overnight. Farther north into Plumas
and Lassen counties and the Surprise Valley...additional amounts
will be a little lower this evening and overnight...maybe up to 2
inches with higher amounts above 5500 feet.

Snow showers should develop into western Nevada and Mono County
this evening as well. Amounts will be limited due to the warm
ground in the valleys of western Nevada while accumulations in
Mono County should be confined to areas above 7500 feet; any
accumulations in Mono County should be less than 4 inches. It is
not out of the question to get up to a half an inch later tonight
in some parts of western Nevada...mainly above 5000 feet.

A period of gusty winds will continue into the evening as well
ahead of this main upper level low; gusts up to 40 mph are
possible for western Nevada and far northeast California.

As the upper low moves east Sunday another weak short wave trough
drops down the back side of the low and will allow showers to
linger over much of the region during the day. But again...
accumulating snow is hard to come by below about 5500 feet in the
daytime in late March. The Sierra could see about another inch.

Conditions improve Monday as the low moves farther away. Northerly
flow should keep the highs rather cool and another weak area of
lift may bring a few showers to locations near the Oregon border
through the day. That will end overnight as a ridge starts to
build and dries out the area. The main concern late Monday night
will be developing easterly flow over the Sierra ridges that could
bring stronger winds on the western slopes and gusty winds and
higher waves to the west shore of Lake Tahoe.

.LONG TERM...Tuesday through the end of March...

A quiet end to an active March is in store next week as upper level
ridging develops off the west coast. This ridge will provide a
warming and drying trend through the week as it slowly progresses
inland. High temperatures will warm from the 50s for western Nevada
valleys (40s Sierra valleys) on Tuesday to the upper 60s to near 70
(low 60s Sierra) for Thursday-Saturday. No precipitation is expected
during this time with just periods of passing high clouds Tuesday
and Wednesday. Some high clouds will linger near the southern Oregon
border Thursday with increasing coverage possible into the weekend
as the ridge begins to flatten.  Generally light winds from the
north can be expected through midweek, becoming west by Friday-
Saturday. Fuentes



Snow showers throughout the Sierra and northeast California will
result in a mix of MVFR and IFR conditions overnight with
occasional showers in western Nevada producing intermittent MVFR
conditions. Light accumulations are possible overnight at the
Sierra terminals with up to 3 inches of snow possible for KTVL
and about 2 inches for KTRK. KMMH should see an inch or two. No
accumulation is expected for KRNO or most of the other lower
valley terminals... but those above 5000 feet in the valleys could
get up to half an inch of slush before it melts.

Surface wind gusts up to 40 mph are likely into the evening
hours...mainly east of the Sierra. Stronger winds aloft should
keep turbulence over the mountains.

Snow showers linger throughout the forecast area Sunday producing
occasional MVFR conditions...except occasional IFR in the Sierra.
These showers should dissipate in the evening.

Gusty east winds could develop over the Sierra Monday night with
turbulence over the mountains and west in central California.


.REV Watches/Warnings/Advisories...
NV...Winter Weather Advisory until 5 AM PDT Sunday NVZ002.

     Lake Wind Advisory until 8 PM PDT this evening for Pyramid Lake
     in NVZ004.

CA...Winter Weather Advisory until 5 AM PDT Sunday CAZ071.

     Winter Weather Advisory until 5 AM PDT Sunday CAZ070.

     Winter Weather Advisory until 5 AM PDT Sunday CAZ072.



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