Biggs, California Weather Forecast Discussion

059
FXUS66 KSTO 282038
AFDSTO
Area Forecast Discussion
National Weather Service Sacramento CA
138 PM PDT Sun Sep 28 2025
For additional details on weather and expected impacts over the
next 7 days, please visit weather.gov/sto/briefing.
.SYNOPSIS...
Cooler temperatures with widespread wetting rain early through the
middle of this week across interior NorCal, with the highest
chances within the Coastal Range, southern Cascades, and northern
Sierra. Drier and warmer conditions heading into next weekend.
&&
.KEY MESSAGES...
*  TODAY THROUGH WEDNESDAY:
- Moisture and instability ahead of the low pressure system will
   bring thunderstorm chances south of I-80 this afternoon
   (generally 15-30%, highest south of HWY 50).
- Low pressure moves into the area starting Monday, bringing
   chances for widespread wetting rain through Wednesday. Highest
   totals will be over the mountains.
- Monday also sees a 10-40% chance for thunderstorms across
   interior NorCal, with highest chances in the foothills and
   along the Sierra Crest. Non-zero chance for convection to
   continue into the overnight hours.
- The overall trend in precipitation totals has trended down
   again slightly, with most of the Valley looking at less than
   half an inch of rain over the 72 hr period.
- 20-50% chance of a half inch of rain or more in the central and
      southern Sacramento Valley, and northern San Joaquin Valley
- 60-80% chance in the northern Sacramento Valley
- 50-80% chance of 1 inch or more of rain in the mountains
* THURSDAY THROUGH SATURDAY:
- Lingering showers are possible Thursday morning, though there
   is still some uncertainty in the timing of the end of this
   system and any totals for Thursday.
- Friday sees a return to dry weather and a slight warming trend
   into the weekend, with daytime highs reaching closer to
   normal.
.AVIATION...
MVFR conditions in the northern and southern Sacramento Valley
from overcast to broken clouds with 1000 to 2000 ft ceilings
through 21z before decreasing througout the eveninig. VFR
conditions otherwise with onshore flow and gusts 15-20 kts over
the Valley and mountains until 06z Monday.
&&
.STO WATCHES/WARNINGS/ADVISORIES...
None.
&&
$$

NWS STO Office Area Forecast Discussion