416
FXUS66 KSTO 231946
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
1246 PM PDT Wed Apr 23 2025

.Discussion...

.Synopsis...
Chances for afternoon and evening showers are in store into the
early weekend with Friday-Saturday as the best days for
widespread precipitation and thunderstorm development. A cooling
trend with light mountain snow showers on Saturday is expected
with minor travel impacts.

&&

.Key Messages...

* Today: Last day of warm temps and trending cooler through the
  rest of the week. Isolated showers and thunderstorms tonight,
  mainly over Shasta County.

-Probability of high temperatures 75 degrees F or higher: 50-85%

-10-25% chance of isolated showers or thunderstorms Wednesday and
  Thursday PM across northern Sacramento Valley and surrounding
  terrain.

* Thursday-Weekend:

-Cooling trend with breezy to gusty onshore winds Thursday and
     Friday PM

-Isolated to scattered showers and thunderstorms (10-30%)
  possible, primarily near the Coast Range & Shasta/Tehama
  County, becoming widespread Friday afternoon through Saturday

-High elevation snow showers possible late Friday & Saturday,
  with a 40-70% probability of 2 inch or more of snowfall above
  5500 feet along Sierra/southern Cascades, 25-55% of 4 inches or
  more

    -Lingering mountain showers Sunday, then trending warmer and
     drier

For additional details on weather and expected impacts
over the next 7 days, please visit weather.gov/sto/briefing

.Changes from previous forecast...

* Isolated thunderstorm potential increasing for Thursday-Friday
  PM

* High elevation snowfall potential continues to trend higher
  Friday afternoon through Saturday evening

&&
.AVIATION...

VFR conditions across interior NorCal next 24 hours. South to
west winds mostly below 12 kts expected, with gusts up to 15 to
20 kts for the Central Valley after 20Z Thu.

&&

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

$$