908
FXUS66 KSTO 022054
AFDSTO
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
154 PM PDT TUE SEP 2 2025
FOR ADDITIONAL DETAILS ON WEATHER AND EXPECTED IMPACTS OVER THE
NEXT 7 DAYS, PLEASE VISIT WEATHER.GOV/STO/BRIEFING.
DISCUSSION
SYNOPSIS
A PROGRESSIVE WEATHER SYSTEM BRINGS THUNDERSTORM CHANCES TODAY
THROUGH THURSDAY, AS TEMPERATURES TREND MORE SEASONABLE FROM
MIDWEEK ONWARD.
KEY MESSAGES
* TODAY - THURSDAY:
- WEATHER SYSTEM CONTINUES TO TRACK NORTHWARD ALONG THE
CALIFORNIA COAST TODAY AND WEDNESDAY, BRINGING A GRADUAL COOL
DOWN AND THE RETURN OF PERIODICALLY BREEZY ONSHORE WINDS.
- SLIGHT (10-30%) CHANCE OF AFTERNOON/EVENING ISOLATED
THUNDERSTORMS AS THE SYSTEM MOVES THROUGH.
- LINGERING CHANCES (10-25%) FOR AFTERNOON/EVENING ISOLATED
THUNDERSTORMS ON THURSDAY
- HIGHEST CHANCES FOR THUNDERSTORMS OCCUR TODAY ACROSS THE
SIERRA AND SOUTHERN CASCADES.
* FRIDAY - MONDAY:
- BROAD TROUGHING ALOFT EXPECTED TO REMAIN IN PLACE THROUGH EARLY
NEXT WEEK WITH SLIGHT VARIATIONS IN LOCATION AND ORIENTATION.
- SEASONABLE TO SLIGHTLY BELOW NORMAL TEMPERATURES FORECAST ACROSS
INTERIOR NORCAL BY NEXT WEEKEND AS BREEZY ONSHORE FLOW
PERSISTS.
CHANGES FROM PREVIOUS FORECAST
- SLIGHT INCREASE IN THUNDERSTORM POTENTIAL FOR THURSDAY
AFTERNOON AND EVENING
AVIATION
VFR CONDITIONS ARE EXPECTED OVER THE NEXT 24 HOURS. WINDS WILL BE
GENERALLY 10KT OR LESS, EXCEPT NEAR THE DELTA WITH WINDS UP TO 12
KT AND GUSTS UP TO 15-25 KT INTO 18Z WED. HIGH CLOUDS WILL
CONTINUE TO LIFT NORTH AND EAST TODAY WITH RELATIVELY CLEAR SKIES
RETURNING BY 14Z WED. CHANCES FOR LOCAL MVFR/IFR CONDITIONS FROM
THUNDERSTORMS OVER THE SIERRA AND SOUTHERN CASCADES IN THE
AFTERNOON AND EVENING UNTIL 09Z WED.
STO WATCHES/WARNINGS/ADVISORIES
NONE.
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