Lost Lakes, California Weather Forecast Discussion

948
FXUS66 KSTO 232019
AFDSTO
Area Forecast Discussion
National Weather Service Sacramento CA
119 PM PDT Tue Sep 23 2025
For additional details on weather and expected impacts over the
next 7 days, please visit weather.gov/sto/briefing.
.SYNOPSIS...
Two weather systems to impact the area over the next 7 days.
Confidence high in the first which will bring showers and possibly
a thunderstorm or two to valley and mountains south of I-80 late
Wednesday into Thursday. Second system looking more fall like but
confidence lower on that system early next week. At this time
overall impact from both is low.
&&
.KEY MESSAGES...
* WEDNESDAY - THURSDAY:
- Temperatures cool tomorrow through the next 7 days as pattern
   turns a bit more active.
- Weather system moves into the region from the south bringing
   chance for showers and thunderstorms mainly Wednesday night and
   lesser chance Thursday, with the highest chances along and
   south of I-80, including the valley from Sacramento southward.
- Confidence increasing in a more organized trough approaching
   the west coast early next week, most likely Monday/Tuesday.
   Solutions vary at this time with the traditional ECS showing
   pretty light accumulations. The EC AI model however much wetter
   but not beyond a low impact even with the heavier amounts.
.AVIATION...
VFR conditions are expected through the TAF period, with breezy
northerly winds affecting RDD and RBL through this evening.
Increasing winds out of the SW to S for SMF, SAC, MHR, and MCC
around 09-12z at 10-15kts. Otherwise, SKC is expected through the
TAF period, with increasing clouds out of the south around 17-18z
as a system moves into the region.
&&
.STO WATCHES/WARNINGS/ADVISORIES...
None.
&&
$$

NWS STO Office Area Forecast Discussion