National Weather Service Weather Forecast Office

• Home
• Site Map
• News
• Organization
• Search for: NWS All NOAA 

000
FXUS66 KSTO 201047
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
347 AM PDT Sat Apr 20 2024

.Synopsis...
Warm and dry weather continues into early next week. Locally
breezy winds at times through the Delta. Cooler, near-normal
temperatures return Tuesday through the end of the week with
onshore flow.

&&

.Discussion...
Upper level ridging will continue to be the dominating weather
feature through Monday with warm high temperatures in the low to
mid 80`s at Valley locations. Trough approaching the coast late
Monday will turn the flow to the southwest with Delta breeze
likely to set up Monday evening. Southwest wind gusts up to 25 mph
will be possible through the Delta. Trough will move closer
Tuesday with onshore flow providing a cool down back into the low
70`s for most Valley locations, which will be near normal for this
time of year. An isolated shower or thunderstorm may be possible
over the mountains with chances 10 percent or less Tuesday
afternoon and evening.

&&.

EXTENDED DISCUSSION (Wednesday THROUGH Saturday)...
Cut-off low phased with weaker trough near ORCA progged through
Wednesday with NBM advertising slight chance POPs over the
northern and eastern mountains. Next short wave progged to deepen
over the West Coast Thursday into Friday. Models differ with
progression of this wave with GFS dropping another vort max into
the CWA from the north Saturday, while EC begins to build upstream
EPAC ridging inland. NBM showing slight chance to chance POPs
mainly over the mountains Thursday into Saturday. Overall QPF
looks to be light with minimal travel impacts. Near normal high
temperatures forecast Wednesday into Friday, then possibly above
normal Saturday under building ridge model solution.

&&

.AVIATION...

VFR conditions over interior NorCal next 24 hrs. Surface wind
mainly below 12 kts except vicinity of Delta SWly sustained wind
up to 20 kts.


&&

.STO WATCHES/WARNINGS/ADVISORIES...
None.
&&

$$