Area Forecast Discussion
Issued by The National Weather Service
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FXUS66 KSTO 242116

Area Forecast Discussion
National Weather Service Sacramento CA
216 PM PDT Sat Mar 24 2018

Mountain and even some foothill snow showers are expected through
early Sunday. Snow levels will lower with snowfall accumulation
at low levels. Slippery roads with some travel delays and chain
controls are possible. Dry and warmer weather is expected for next


Showers still moving through the southern part of the region ahead
of the next wave of precipitation that will move through the
area. Snow levels will lower significantly between late evening
and the early morning hours down to around 1500 feet throughout
the interior. Not much snow is expected down at that level other
than a light dusting and in general any accumulating snow above
2000 to 2500 feet.

In the shorter term there is a slight chance for some
thunderstorms to develop later this afternoon into the evening
hours over mainly the northern two thirds of the Sacramento
Valley and surrounding foothills and mountains.

The system will taper off Sunday morning with some lingering
light showers over the mountains for the afternoon. I have
downgraded the winter storm warning to an advisory since amounts
between last night and what is expected tonight are not that
substantial and currently there are no chain controls.

A ridge of high pressure will gradually build over the region each
day through the first half of the week with warmer temperatures
each day getting well into the 70s by Tuesday. Northerly winds
will also develop for Monday and Tuesday but they are not looking
that strong at this time probably peaking in the 10 to 20 mph
range during the daytime.


A ridge of high pressure will be set up over NorCA for the
extended period and that is going to bring quiet weather along
with above average temperatures. Generally highs will run 10-15
above normal with the warmest day Thursday where highs in the
Valley are expected to reach the upper 70s to lower 80s. A weak
short wave will bring slightly cooler temperatures on Saturday but
they will still be mild for this time of year. No rain is
expected with this short wave.



Generally we will see VFR conditions at the TAF sites the next 24
hours. Scattered showers will be possible in the Valley through
10z and MVFR conditions are expected in the vicinity of any
showers. Winds this afternoon and evening will be southerly 10-15
knots gusting to 20 knots at times and will diminish to 5-10
knots overnight. Areas of IFR/LIFR over the mountains through 15z
Sunday due to snow showers.


Winter Weather Advisory until 9 AM PDT Sunday for Burney Basin /
Eastern Shasta County-Clear Lake/Southern Lake County-Mountains
Southwestern Shasta County to Northern Lake County-Western
Plumas County/Lassen Park.

Winter Weather Advisory until 9 AM PDT Sunday for West Slope
Northern Sierra Nevada.

Winter Weather Advisory until 9 AM PDT Sunday for Shasta Lake
Area / Northern Shasta County.


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