579
FXUS66 KSTO 022055
AFDSTO
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
1255 PM PST SUN NOV 2 2025
FOR ADDITIONAL DETAILS ON WEATHER AND EXPECTED IMPACTS OVER THE
NEXT 7 DAYS, PLEASE VISIT WEATHER.GOV/STO/BRIEFING.
KEY MESSAGES
- DRY AND WARM WEATHER PREVAILS THROUGH MONDAY
- ACTIVE WEATHER RETURNS FOR THE MIDDLE OF THIS WEEK WITH
SHOWERS, GUSTY SOUTHERLY WINDS, ISOLATED THUNDERSTORMS, HIGH
ELEVATION SNOW SHOWERS AND COOLER TEMPERATURES.
- HEAVIEST PRECIPITATION IS EXPECTED NORTH OF I-80
DISCUSSION
TODAY...DRY AND WARM WEATHER CONTINUE ACROSS INTERIOR NORCAL THIS
AFTERNOON, ALONG WITH LIGHT, DIURNAL AND TERRAIN DRIVEN WINDS
CONTINUING.
MONDAY - TUESDAY... DRY AND WARM WEATHER CONTINUES TO PREVAIL
THROUGH THE DAY MONDAY. LIGHT WINDS ARE GENERALLY EXPECTED. HIGH
TEMPERATURES ARE FORECAST TO BE IN THE 70S ACROSS THE VALLEY,
FOOTHILLS AND MOUNTAINS OF INTERIOR NORCAL. A RELATIVELY WEAK
SYSTEM WILL BEGIN BRING PRECIPITATION INTO SHASTA COUNTY BY MONDAY
EVENING, WITH CHANCES SPREADING INTO AREAS NORTH OF I-80
OVERNIGHT.
WEDNESDAY - FRIDAY...A DEEP TROUGH MOVES IN WEDNESDAY BRINGING
WIDESPREAD RAIN ACROSS THE REGION, WITH THE BEST POTENTIAL FOR
PERIODS OF MODERATE TO HEAVY RAIN NORTH OF I-80. MODELS CONTINUE
TO FOCUS THE GREATEST PRECIPITATION AMOUNTS OVER SHASTA COUNTY,
THE NORTHEAST FOOTHILLS, THE NORTHERN SIERRA, THE SOUTHERN
CASCADES, AND THE COASTAL RANGE RECEIVING THE HIGHEST RAIN
AMOUNTS. FORECAST RAINFALL AMOUNTS CONTINUE TO TREND HIGHEST OVER
THE MOUNTAINS OF SHASTA COUNTY. ISOLATED THUNDERSTORMS ARE ALSO
POSSIBLE WEDNESDAY AFTERNOON AND EVENING. THIS SYSTEM IS
RELATIVELY WARM SO WILL HAVE HIGHER SNOW LEVELS, GENERALLY ABOVE
7500 FEET WITH THIS SYSTEM. AS A RESULT THE BULK OF SNOWFALL WILL
BE AT HIGHER ELEVATIONS, SUCH AS AT LASSEN NATIONAL PARK AND THE
HIGHER PEAKS OF THE SIERRA AND SOUTHERN CASCADES, WHERE SEVERAL
INCHES OF WET SNOW ARE POSSIBLE. MINOR IMPACTS INCLUDE WET/SLICK
ROADS IN THE MOUNTAINS WEDNESDAY NIGHT AS SNOW LEVELS BRIEFLY FALL
TO 7000 FEET. GUSTY SOUTHERLY WINDS ARE EXPECTED OVER THE
SACRAMENTO VALLEY, THE DELTA, THE SIERRA AND THE SOUTHERN
CASCADES THROUGH THE DAY WEDNESDAY, WITH GUSTS TO AROUND 45 MPH.
LINGERING SCATTERED SHOWERS MAINLY NORTH OF I-80 CONTINUE THROUGH
THURSDAY, WITH ANOTHER SYSTEM FOCUSED OVER THE NORTHERN MOUNTAINS
AND NORTHERN SACRAMENTO VALLEY ON FRIDAY BRINGING ADDITIONAL
CHANCES OF SHOWERS. COOLER TEMPERATURES ARE ALSO EXPECTED MID TO
LATE WEEK. AS ALWAYS REMEMBER TO CHECK YOUR LOCAL WEATHER FORECAST
AT WEATHER.GOV FOR UPDATES.
AVIATION
VFR CONDITIONS PREVAIL ACROSS INTERIOR NORCAL NEXT 24 HOURS.
LIGHT, VARIABLE SURFACE WINDS BELOW 12 KNOTS. SLIGHT CHANCE OF
SHOWER AFTER 12Z MONDAY MAINLY FOR AREAS IN NORTHERN SACRAMENTO
VALLEY.
STO WATCHES/WARNINGS/ADVISORIES
NONE.
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