Area Forecast Discussion
Issued by NWS Sacramento, CA
FXUS66 KSTO 140500
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
1000 PM PDT Sun Apr 13 2014
High pressure and well above normal temperatures will continue into
Monday, followed by a series of weak troughs that move through
northern California throughout the week.
.Short Term Discussion...
Upper ridge axis along the West Coast will slowly progress through
Interior NorCal overnight into Monday morning. Gusty North winds
earlier have diminished and flow has turned onshore through the
Delta. Much of the Coastal stratus eroded earlier today under
increased Northerly flow, but with weaker gradients attm, Fog
product showing it starting to redevelop along the Coast. However
with a much weaker Delta flow compared to 24 hours ago, not
expecting any stratus intrusion into the Central Valley overnight.
Southern portions of weak Pacific frontal system, currently nearing
130W, will approach the CWA Monday and move through Monday night
into Tuesday morning. Some mostly thin baroclinic cirrus will move
over the area tomorrow night, but should have little impact of the
viewing of the Lunar eclipse. Another weak embedded wave moves
through Tuesday in Northwesterly flow aloft. Main impact will be a
slight downward trend of temps over the next several days.
Upper ridging begins to rebuild back into the area late Tuesday and
Wednesday as surface high pressure strengthens over Oregon resulting
in some breezy northerly winds. Little change in high temps expected
on Wednesday as northerly flow and low level cold air advection are
offset by downslope and minor synoptic warming.
.Extended Discussion (Thursday through Sunday)
The extended forecast starts with a warm day Thursday as a ridge
sits over the west coast. Valley highs will peak in the low 80s
while higher elevations warm up into the 60s and 70s.
Slight cooling on Friday and Saturday as a weak trough brushes
past far NorCal. This could bring a slight chance of rain to the
mountains over the weekend. By Sunday, the slight chance of
showers may spread into the Northern Sacramento valley, but
confidence is still low since the extended models continue to vary
in their solutions. Thus, a mostly dry forecast in the extended
for the Central Valley. JBB
Predominantly VFR conditions next 24 hours. Mountain ridges and
northeast Valleys may get local gusts to 30 kt overnight through
12z. Light and variable winds across much of the area for Monday