NWS Area Weather Forecast Discussion
County Warning Area [CWA]: STO Regional NWS Weather Office: Sacramento, CA
FXUS66 KSTO 202128
Area Forecast Discussion
National Weather Service Sacramento CA
228 PM PDT Sat Oct 20 2018
Dry into next Wednesday, then a slight chance of light
precipitation mainly over the Coastal and Shasta mountains late
Wednesday night into Friday. Above normal temperatures trending
down to near normal by middle of next week.
High pressure will continue over the western states with a weak
dry upper level low pressure area over California. Above normal
temperatures will continue through Tuesday with only a minor
cooling trend for Monday and Tuesday as the low moves from
centered along the coast to over the Great Basin. Temperatures at
night will continue to cool into the 40s for most valley
locations with upper 20s to mid 30s for the mountain valleys.
.EXTENDED DISCUSSION (Wednesday THROUGH Saturday)
A couple of weak systems will move through the Pacific Northwest
to flatten out the ridge over California. The first one moves
through Tuesday night into Wednesday with precipitation staying
north of the forecast area. A slightly stronger one will have the
tail end moving through the Thursday night into Friday that may be
able to bring some showers over Shasta County. The main impact
from these two weak systems will be to cool temperatures closer to
seasonal normals. Some ridging will occur for Friday and Saturday
to bring a warming trend into next weekend.
VFR conditions will continue for interior northern California
over the next 24 hours. Winds will be light at all TAF sights.