NOAA's National Weather Service
Weather Alerts for West Slope Northern Sierra Nevada California   (CAZ069)

icn  WINTER STORM WATCH
WEST SLOPE SIERRA NEVADA   (CAZ069)

Effective: Wed, Jan 24, 2018 04:00pm PST Severity: Moderate
Updated: Mon, Jan 22, 2018 01:05pm PST Urgency: Future
Expires: Fri, Jan 26, 2018 10:00am PST Certainty: Possible

Areas Affected: West Slope Northern Sierra Nevada
 
Alert:
...Winter Storm Wednesday into Friday...
.Pacific storm will bring periods of moderate to heavy snow and
gusty wind to the mountains Wednesday afternoon into Friday.
Heaviest snow and strongest wind expected Wednesday night into
Thursday. Hazardous winter driving is possible during this period
with travel delays and chain controls likely. Drier weather
develops Friday into the weekend.
...WINTER STORM WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH
FRIDAY MORNING...
* WHAT...Heavy snow and strong wind combine to make mountain
travel very difficult to impossible, especially Wednesday night
into Thursday. Total snow accumulations around 1 foot, with
several feet possible over highest terrain.
* WHERE...West Slope Northern Sierra Nevada including Interstate
80 and highway 50.
* WHEN...From Wednesday afternoon through Friday morning.
* ADDITIONAL DETAILS...Significant reductions in visibility are
possible. Wind gusts 40 to 60 mph possible over higher terrain.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Winter Storm Watch means there is potential for significant
snow and gusty wind impacting travel. Continue to monitor the
latest forecasts.

 

icn  SPECIAL WEATHER STATEMENT
WEST SLOPE SIERRA NEVADA   (CAZ069)

Effective: Mon, Jan 22, 2018 12:20pm PST Severity: Minor
Updated: Mon, Jan 22, 2018 12:20pm PST Urgency: Expected
Expires: Tue, Jan 23, 2018 04:30am PST Certainty: Observed

Areas Affected: Burney Basin, Eastern Shasta County; Carquinez Strait and Delta; Central Sacramento Valley; Clear Lake, Southern Lake County; Motherlode; Mountains Southwestern Shasta County to Northern Lake County; Northeast Foothills, Sacramento Valley; Northern Sacramento Valley; Northern San Joaquin Valley; Shasta Lake Area, Northern Shasta County; Southern Sacramento Valley; West Slope Northern Sierra Nevada; Western Plumas County, Lassen Park
 
Alert:
...Stronger Pacific Storm Midweek...
A stronger Pacific storm will bring periods of moderate to heavy
precipitation and gusty wind Wednesday with unsettled weather
continuing Thursday into Friday. Heaviest precipitation and
strongest wind expected Wednesday into early Thursday. Snow levels
will initially be 4000 to 6000 feet Wednesday, but lower to 2000
to 3500 feet Thursday. Rainfall amounts of around a third to an
inch and a half forecast in the Central Valley, with 1 to 3
inches for the foothills and mountains. Several feet of snow
possible over the higher terrain with wind gusts at times of 40 to
60 mph. Decreasing showers Friday with drier weather forecast
over the weekend.
Impacts:
Hazardous driving conditions possible in the mountains with
travel delays and chain controls likely. Lower elevations will see
slick roads. Gusty wind Wednesday could impact high profile
vehicles.