Area Forecast Discussion
Issued by NWS Reno, NV

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FXUS65 KREV 312211

Area Forecast Discussion
National Weather Service Reno NV
311 PM PDT Tue Mar 31 2020


A broad area of low pressure over the northwest US will keep brisk
and cool conditions with periods of light rain or snow showers
well north of I-80 through Wednesday; elsewhere, dry and breezy
conditions will prevail. Late week will likely remain cooler than
average with a chance for more rain and snow over the weekend.



The main forecast changes through Thursday were to increase winds
Wednesday afternoon and evening, most notably south of Highway 50,
and to issue another lake wind advisory for Lake Tahoe and Pyramid
Lake Wednesday.

A cold front resides near the Oregon-California-northwest Nevada
border this afternoon. Winds out ahead of the front are generally
gusting to between 25-35 mph this afternoon, although wind-prone
spots along Highway 395/I-580 in western Nevada and a few areas
north of Pyramid Lake are gusting to between 35-45 mph.

Late tonight and Wednesday, the front will get a push as an upper
low over the far northwest CONUS sags southward. The front looks
dry for most locations although some light showers remain possible
well north of Interstate 80. Little or no travel impacts are expected
from the showers. The main story elsewhere will be another day of
gusty winds along with some cooling, mainly near and north of Highway
50. The winds Wednesday look strongest over Mono and Mineral
counties where gusts could reach 35-45 mph, with generally 20-35
mph north of that area. Another lake wind advisory was issued for
Lake Tahoe and Pyramid Lake Wednesday afternoon into the evening
for hazardous, choppy conditions for small boats and watercraft.

Wednesday night and Thursday, winds should ease down considerably
as surface high pressure settles into the region. Highs Thursday
will top out around 7-10 degrees below average, or low to mid 40s
in Sierra valleys and upper 40s to mid 50s in the lower valleys.
Lows will drop to below freezing everywhere Wednesday and Thursday
nights. -Snyder

.LONG TERM...Friday through Tuesday...

Confidence continues to increase for a moderate winter storm to
impact the region this weekend. Updates today were to continue to
increase POPs and QPF Saturday and Sunday.

Winds will pick up ahead of the system with breezy conditions likely
over the weekend. The strongest winds are expected on Sunday with
wind gusts up to 30 to 40 mph possible.

It looks like a two wave storm at this point with the first wave
coming in Saturday and a second wave coming in Sunday/Sunday
evening. Mountain snow could disrupt travel over Sierra passes from
early Saturday morning through Monday morning. It`s still a ways
out, but early snow projections for the upper elevations look to
be in the 1-2 foot range with around 4-8 inches possible near lake
level. Amounts in Mono County look a little lower right now, but
some simulations have been swinging the low pressure a little
farther south which would favor the eastern Sierra.

With the current storm trajectory western Nevada would be mostly
shadowed from the precipitation with mainly light rain and snow
pellet showers creating a light dusting, possibly up to a few
inches of snow in the foothills, mostly in the overnight hours
Saturday and Sunday. Snow could accumulate near valley floors Sunday
night, but amounts would likely be very light.

Cool and breezy conditions will continue into early next week, but a
break in the precipitation is likely Tuesday through midweek. -Zach



A cold front is currently draped near the Oregon-California-Nevada
border. Ahead of the front, gusts of 25-30 kt will occur for
terminals (with some decrease tonight/early Wednesday) across
northeast CA, the Sierra, and western Nevada...with local gusts up
to around 35 kts. Sierra ridge gusts to around 60-65 kt through
Wednesday will contribute to mountain wave turbulence.

A few showers are possible well north of I-80 through Wednesday
morning as the cold front begins to drive south, with MVFR CIGS/VIS
and higher terrain obscuration possible. Otherwise, VFR conditions
will prevail for the next few days with gusty surface winds again
Wednesday diminishing by Wednesday night and Thursday as surface
high pressure builds into the region.

The next storm system may bring some increase in winds Friday,
with periods of gusty winds and increased chances for rain and
snow for the upcoming weekend. -Snyder


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

     Lake Wind Advisory from 11 AM to 8 PM PDT Wednesday for Pyramid
     Lake in NVZ004.

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

     Lake Wind Advisory from 11 AM to 8 PM PDT Wednesday for Lake
     Tahoe in NVZ002.

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

     Lake Wind Advisory from 11 AM to 8 PM PDT Wednesday for Lake
     Tahoe in CAZ072.



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