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wwus85 krev 232121

special weather statement
national weather service reno nv
221 pm pdt wed apr 23 2014

surprise valley california-lassen-eastern plumas-
eastern sierra counties-greater lake tahoe area-mono-
mineral and southern lyon counties-greater reno-carson city-
minden area-western nevada basin and range including pyramid lake-
northern washoe county-
including the cities of...cedarville...eagleville...
fort bidwell...portola...susanville...westwood...sierraville...
loyalton...south lake tahoe...tahoe city...truckee...
markleeville...bridgeport...coleville...lee vining...
mammoth lakes...hawthorne...yerington...smith valley...mina...
schurz...glenbrook...incline village...sparks...verdi...
gardnerville...virginia city...fernley...fallon...lovelock...
silver springs...nixon...imlay...empire...gerlach
221 pm pdt wed apr 23 2014

...a brief return to winter for the sierra this week...

another strong cold front will drop through the region thursday
and friday. ahead of this front gusty winds will develop thursday
night. while not as strong as the most recent system, wind gusts
of up to 45 mph are possible in the lee of the sierra thursday
night and early friday morning.

more significantly, light rain and high elevation snow will
develop over northeast california thursday evening and spread
south through the sierra on friday. with the heaviest snow fall
moving through the tahoe basin during the day, combined with warm
ground temperatures, accumulations should be limited to areas
above 7000 feet friday in the tahoe basin. travel restrictions are
possible late thursday night and early friday morning.

farther south into mono county, the heaviest snow is likely from
late friday afternoon into friday evening. the later start to the
heaviest snow could lead to more widespread accumulating snow from
sonora pass to the south, especially above 7500 feet. this could
cause travel restrictions on highway 395 through central and
southern mono county friday night. 

in western nevada rain and snow showers will be less widespread
with this system, but snow levels could fall to near 5000 feet by
friday night.

due to uncertainties within the forecast, the exact amount and
timing of any precipitation could change before friday morning.
high elevation snow advisories may be needed for friday afternoon
and evening, but have not been issued as yet. continue to check
the forecast often as this late season winter weather develops.

wwus86 ksto 232125

special weather statement
national weather service sacramento ca
225 pm pdt wed apr 23 2014

shasta lake area / northern shasta county-
burney basin / eastern shasta county-northern sacramento valley-
central sacramento valley-southern sacramento valley-
carquinez strait and delta-northern san joaquin valley-
mountains southwestern shasta county to northern lake county-
clear lake/southern lake county-
northeast foothills/sacramento valley-motherlode-
western plumas county/lassen park-
west slope northern sierra nevada-
225 pm pdt wed apr 23 2014

...colder pacific storm late thursday into early saturday...

* impacts: chain requirements possible with accumulating snow over
  trans-sierra mountain passes late thursday through early
  saturday. thunderstorms possible friday with heavy rain, small
  hail, and gusty wind.

* confidence: high in timing. medium in precipitation amounts and
  thunderstorm potential.

* timing: light precipitation is possible over shasta county and
  the coastal mountains thursday. precipitation then increases and
  spreads over all of interior northern california late thursday
  into friday. best thunderstorm chances are friday into friday
  evening. decreasing showers saturday with lingering chances
  mainly over the mountains through the weekend.

* snow levels: initially around 6000 to 7000 feet thursday into
  thursday night...lowering to 4500 to 5500 feet friday then 3500
  to 4500 feet by early saturday.

* precipitation amounts: generally around half an inch or less in
  the central valley with higher amounts possible in the foothills
  and mountains and with thunderstorms. snow amounts from 6 to 12
  inches over the higher mountain terrain.


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