852
FXUS66 KSTO 282219
AFDSTO
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
219 PM PST FRI NOV 28 2025
KEY MESSAGES
- DRY CONDITIONS AND POSSIBLE PERIODS OF MORNING VALLEY AND
ADJACENT FOOTHILLS FOG AND MIST CONTINUE THROUGH THE
WEEKEND
- BELOW NORMAL TEMPERATURES AND LOW CLOUDS CONTINUE IN THE
VALLEY, DELTA AND LOWER FOOTHILLS THROUGH THE WEEKEND, WITH
SUNNY SKIES AND ABOVE NORMAL TEMPERATURES IN THE UPPER
FOOTHILLS AND MOUNTAINS
- DECREASING CHANCES FOR PRECIPITATION WITH JUST A SLIGHT CHANCE
OF SHOWERS SOUTH OF I-80 MID WEEK.
- PERIODICALLY BREEZY NORTH TO EAST WINDS EXPECTED LATE SUNDAY
AND AGAIN WEDNESDAY
DISCUSSION
..TODAY - THIS WEEKEND
CURRENT GOES-WEST IMAGERY SHOWS A
BROAD STRATUS DECK CONTINUING TO COVER THE DELTA, VALLEY, AND
ADJACENT LOWER FOOTHILLS THIS AFTERNOON. THIS CLOUD COVERAGE HAS
KEPT TEMPERATURES QUITE COOL IN THOSE AREAS TODAY, 10-15 DEGREES
BELOW NORMAL FOR THIS TIME OF YEAR, WHILE HIGHER ELEVATIONS HAVE
BEEN SUNNY AND MILD. THE LOW CLOUDS ALSO GREATLY LIMITED THE
DEVELOPMENT OF FOG LAST NIGHT INTO THIS MORNING. THE PATCHY FOG
THAT DEVELOPED OVER THE LOWER MOTHERLODE FOOTHILLS AND FOR
PORTIONS OF THE NORTHERN SACRAMENTO VALLEY DIMINISHED BY MID-
MORNING, WITH SOME MIST AND HAZE PERSISTING INTO THE AFTERNOON.
DENSE FOG MAY RETURN TO SOME PORTIONS OF THE AREA THIS EVENING
INTO SATURDAY MORNING, BUT THE PERSISTENT LOW CLOUD COVER WILL
LIKELY BE A LIMITING FACTOR AGAIN FOR FOG DEVELOPMENT.
PROBABILITIES OF FOG (VISIBILITIES LESS THAN A HALF-MILE)
CURRENTLY SIT AROUND 50 TO 70 PERCENT FOR THE NORTHERN AND
CENTRAL SACRAMENTO VALLEY AND THE LOWER FOOTHILLS, WHILE THE
DELTA, SOUTHERN SACRAMENTO VALLEY, NORTHERN SAN JOAQUIN HAVE
PROBABILITIES AROUND 30 TO 40 PERCENT. ASIDE FROM PERIODIC FOG
DEVELOPMENT AND LOW CLOUDS, COOL VALLEY/DELTA TEMPERATURES AND DRY
WEATHER ARE EXPECTED TO PERSIST THROUGH THE WEEKEND.
..NEXT WEEK
BREEZY NORTH TO EAST WINDS WILL BE POSSIBLE
LATE SUNDAY INTO MONDAY, AROUND 20 MPH IN THE VALLEY, WITH THE
STRONGEST WIND GUSTS UP TO 35 MPH EXPECTED ALONG THE SIERRA. WITH
A MORE PERSISTENT OFFSHORE(NORTH-EAST) WIND PATTERN SETTING UP
LATE WEEKEND INTO NEXT WEEK, FOG DEVELOPMENT IS EXPECTED TO BE
LESS RELATIVE TO THIS PAST WEEK. MORE NORMAL TEMPERATURES ARE
EXPECTED WITH LESS LOW CLOUD COVERAGE OVER THE VALLEY. ENSEMBLE
GUIDANCE THEN INDICATES SOME POTENTIAL FOR AN INSIDE SLIDER TYPE
SYSTEM DROPPING INTO THE GREAT BASIN, BRINGING THE POTENTIAL FOR
BREEZIER NORTH TO EAST WINDS AND ANOTHER SLIGHT CHANCE FOR
MOUNTAIN SHOWERS WILL BE POSSIBLE. CURRENTLY THESE SHOWERS LOOK
LIGHT AND LIMITED TO THE SIERRA SOUTH OF I-80.
AVIATION
MVFR CONDITIONS LINGER AT TAF SITES IN BR/LOW STRATUS THROUGH THE
AFTERNOON AND EARLY EVENING, WITH IFR/LIFR CONDITIONS RETURNING
IN AREAS OF FG/BR AND LOW STRATUS CIGS AFTER 06Z. LIGHT AND
VARIABLE WINDS EXPECTED TO PERSIST AT LOW ELEVATIONS NEXT 24
HOURS, WITH BREEZY, DOWNSLOPING EAST WINDS ALONG THE SIERRA AFTER
06Z.
STO WATCHES/WARNINGS/ADVISORIES
NONE.
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