Area Forecast Discussion
Issued by The National Weather Service
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000
FXUS66 KSTO 180930
AFDSTO
Area Forecast Discussion
National Weather Service Sacramento CA
230 AM PDT Thu Apr 18 2024
.Synopsis...
Warm and dry weather continues through the week. Locally breezy
at times.
&&
.Discussion...
Clear skies cover interior NorCal early this morning. Northerly
surface pressure gradient has relaxed since Wednesday, but east
gradient has tightened a bit. Still seeing some local north to
east wind gusts of 15-25 mph across the northern mountains and
northern Sierra, and northerly gusts of 10-20 mph over the
northern Sacramento Valley. Current temperatures are similar to 24
hours ago and range from the mid 30s to mid 40s over the mountains
to the 50s to mid 60s in the Central Valley.
Upper level ridging will continue dry and mild weather with above
average temperatures through the weekend. Valley highs will be in
the upper 70s to mid 80s, with 70s to near 80 in the foothills,
and 50s to 70s in the mountains. Occasional high clouds will be
possible, but the airmass will likely remain too stable to support
deeper convection and any showers.
&&
.EXTENDED DISCUSSION (Monday THROUGH Thursday)...
Upper ridge axis shifts through interior NorCal Monday continuing
dry conditions with above normal temperatures. Models then suggest
upper low will approach CA Tuesday, but differ significantly with
depth and position of it. EC keeps lower latitude cut-off low
offshore through Wednesday, then weakens it to trough as it moves
through SoCal Thursday. GFS progs deeper low farther north and off
the West Coast through Thursday, as secondary low injects into
main system. Model discrepancies lead to forecast uncertainty. NBM
introduces slight chance POPs over the northern and eastern
foothills/mountains Wednesday with higher POPs Thursday which also
include a threat of showers in the Northern and Central Sac
Valley. High temperatures expected to return to near normal
Tuesday, then below normal Wednesday and Thursday.
&&
.AVIATION...
VFR conditions over interior NorCal next 24 hrs with sfc wind
mainly at or below 12 kts.
&&
.STO WATCHES/WARNINGS/ADVISORIES...None.
&&
$$
Air Quality
