FXUS66 KSTO 142109
AFDSTO
Area Forecast Discussion
National Weather Service Sacramento CA
209 PM PDT Sat Jun 14 2025
SYNOPSIS...
Dry weather continues into next week. Slight cooldown expected
through the weekend with periods on breezy onshore flow. Warming
trend by Tuesday, followed by areas of Moderate HeatRisk in the
Valley and foothills on Wednesday. Cooling trend expected late
next week with stronger onshore flow.
.KEY MESSAGES...
* Today-Monday:
-Seasonable temperatures are expected through early next week.
-Probability of Valley High Temperatures > 90F:
--Northern/Central Sacramento Valley: 50-90% Sun- Mon
--Delta, S. Sac Valley, N. San Joaquin Valley: 35-70% Sun- Mon
-Onshore flow expected to persist with periods of breezy winds,
mainly in the afternoons and evenings and strongest across the
Delta and vicinity. Breezy westerlies over the Sierra.
* Tuesday-Thursday:
- Above normal temperatures with areas of Moderate HeatRisk in
the Valley and foothills by Wednesday as ridging develops.
Potential for triple digit heat in the northern Sacramento
Valley (40-70% probability); low to upper 90s in other Valley
locations.
-Probability of Valley High Temperatures > 95F:
--Northern/Central Sacramento Valley: 50-90% Tue & Thu, 70-100%
Wed
--Delta, S. Sacramento Valley, N. San Joaquin Valley: 10-35%
Tue & Thu, 50-80% Wed
-Warming and drying trend by mid-week may bring a brief period of
elevated fire weather conditions, mainly across the northern
Sacramento Valley.
*Late Next Week:
-Cooling trend expected late next week with stronger onshore
flow. Strongest winds expected through the Delta and over the
Sierra.
.Changes from previous forecast...
-No notable forecast changes since last update.
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