Scientific Forecaster Discussion
fxus66 ksto 250417
Area forecast discussion
National Weather Service Sacramento California
917 PM PDT Mon Apr 24 2017
weak weather systems will bring light precipitation through
Wednesday. Gusty north winds likely to develop Thursday through
scattered showers continue over the western slopes this evening.
The hrrr indicates showers persisting past midnight before
ending. Snow levels remain in the 6500 to 7000 ft range.
Moist zonal flow will continue to stream clouds over the region
through Wednesday. A weaker disturbance on Tuesday may bring some
more light amounts of precipitation to the interior. Most of the
precipitation will be over the mountains. Any showers that occur
would be over the coastal range. A third weak disturbance will
move through late Tuesday night and Wednesday and bring a chance
at getting showers down to the Sacramento region within the
valley. Snow levels will be high and snow will be a non factor
Today was the coolest day this week with gradual warming through
midweek back to near normal by Thursday. Breezy north winds are
likely to develop on Thursday as high pressure starts to build
into the region.
Extended discussion (friday through monday)
Dry northerly flow expected over the weekend as an upper ridge
builds inland over interior norcal. This will lead to dry
conditions and temperatures trending upward across the forecast
area. Daytime highs could be around 5-8 degrees above normal this
weekend, with valley temperatures reaching the lower 80s. Periods
of gusty northerly winds are expected Friday into Saturday as
pressure gradient tightens, with 35-45 mph gusts in the valley.
Areas MVFR/IFR conditions possible in mountains with isolated LIFR in
shower activity this evening. Improving conditions expected
overnight as shower activity ends. Gusty winds with gusts up to 20
kts mainly south of ksac after 18z Tuesday.