804
FNUS76 KSTO 201308
FWSSTO
SPOT FORECAST FOR CONCOW RX...USFS
NATIONAL WEATHER SERVICE SACRAMENTO CA
508 AM PST SAT DEC 20 2025
FORECAST IS BASED ON IGNITION TIME OF 0700 PST ON DECEMBER 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
ACTIVE WEATHER IS EXPECTED OVER THE WEEKEND AND THROUGH THE
UPCOMING HOLIDAY PERIOD. A BRIEF LULL IN PRECIPITATION IS
ANTICIPATED EARLY THIS MORNING, WITH MODERATE TO HEAVY RAINFALL
BECOMING MORE WIDESPREAD BY THE AFTERNOON. WHILE ADDITIONAL MINOR
BREAKS BETWEEN SYSTEMS WILL BE POSSIBLE AT TIMES NEXT WEEK,
PERSISTENT PERIODS OF MODERATE TO HEAVY RAIN ARE GENERALLY
EXPECTED THROUGH AT LEAST THURSDAY AS STRONGER AND COLDER SYSTEMS
IMPACT THE REGION FROM TUESDAY ONWARD.
FORECAST PRECIPITATION TOTALS OF 3-5 INCHES ARE CURRENTLY
EXPECTED THROUGH SUNDAY EVENING WITH PROBABILITIES OF AN
ADDITIONAL 6 INCHES OF RAINFALL MONDAY-WEDNESDAY SITTING AROUND
60-80% AT THIS TIME. SOUTH WINDS WILL BEGIN BREEZY WITH GUSTS UP
TO 25 MPH AT TIMES THROUGH THIS EVENING BEFORE INCREASING
OVERNIGHT INTO SUNDAY WITH GUSTS 35 TO 45 MPH AT TIMES. ADDITIONAL
PERIODS OF GUSTY SOUTH WINDS ARE ANTICIPATED THROUGH NEXT WEEK AS
WELL, WITH A 30-60% PROBABILITY OF GUSTS GREATER THAN 40 MPH
TUESDAY INTO WEDNESDAY.
TODAY
SKY/WEATHER.........CLOUDY. RAIN LIKELY IN THE MORNING, THEN RAIN
IN THE AFTERNOON.
MAX TEMPERATURE.....50-54.
MIN HUMIDITY........94-98 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTH WINDS 5 TO 14 MPH. GUSTS UP TO 25 MPH IN
THE MORNING.
RIDGETOP...........SOUTH 6 TO 14 MPH.
MIXING HEIGHT.......1300 FT AGL.
TRANSPORT WINDS.....SOUTH 6 TO 14 MPH.
CWR.................12 PERCENT INCREASING TO 99 PERCENT LATE IN THE
AFTERNOON.
CHANCE OF THUNDER...5 PERCENT.
TIME (PST) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY COVER.......CDY CDY CDY CDY CDY CDY CDY MC CDY CDY CDY
CWR.............10 10 10 10 10 10 10 10 10 100 100
CHC OF THDR (%).10 10 10 0 0 0 0 0 0 0 0
TEMP............49 49 48 48 48 49 50 50 51 50 52
RH..............96 100 99 99 100 100 100 99 98 98 91
SL/VL WIND DIR..S S S S S S S S S S S
SL/VL WIND SPD..14 14 14 12 10 8 7 7 6 6 6
SL/VL WIND GUST.24 25 23 21 20 18 16 15 14 12 12
RIDGE WIND DIR..S S S S S S S S S S S
RIDGE WIND SPD..14 14 14 13 13 13 9 9 9 6 6
MIX HGT (KFT)...0.9 0.9 0.9 1.3 1.3 1.3 1.1 1.1 1.1 0.7 0.7
TRANSP WIND DIR.S S S S S S S S S S S
TRANSP WIND SPD.14 14 14 13 13 13 9 9 9 6 6
TONIGHT
SKY/WEATHER.........CLOUDY. RAIN.
MIN TEMPERATURE.....48-52.
MAX HUMIDITY........98-100 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......BREEZY. SOUTH WINDS 5 TO 17 MPH WITH GUSTS TO
AROUND 32 MPH INCREASING TO 16 TO 25 MPH WITH
GUSTS TO AROUND 44 MPH OVERNIGHT.
RIDGETOP...........SOUTH 6 TO 15 MPH INCREASING TO 22 TO 25 MPH
OVERNIGHT.
MIXING HEIGHT.......200 FT AGL.
TRANSPORT WINDS.....SOUTH 9 TO 25 MPH INCREASING TO AROUND 25 MPH
AFTER 3 AM.
CWR.................100 PERCENT.
CHANCE OF THUNDER...6 PERCENT.
TIME (PST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY COVER.......CDY CDY CDY CDY CDY CDY CDY CDY CDY CDY CDY CDY
CWR.............100 100 100 100 100 100 100 100 100 100 100 100
CHC OF THDR (%).0 0 0 0 0 0 0 10 10 10 10 10
TEMP............51 52 52 52 52 52 51 52 52 52 53 53
RH..............95 95 97 97 97 94 94 96 96 96 97 97
SL/VL WIND DIR..SE SE S S S S S S S S S S
SL/VL WIND SPD..6 7 8 9 10 13 15 17 21 22 25 25
SL/VL WIND GUST.12 13 15 16 18 23 28 32 37 39 44 44
RIDGE WIND DIR..S S S S S S S S S S S S
RIDGE WIND SPD..6 9 9 9 15 15 15 22 22 22 25 25
MIX HGT (KFT)...0.7 0.2 0.2 0.2 0.2 0.2 0.2 0.5 0.5 0.5 0.7 0.7
TRANSP WIND DIR.S S S S S S S S S S S S
TRANSP WIND SPD.6 9 9 9 15 15 15 22 22 22 25 25
SUNDAY
SKY/WEATHER.........CLOUDY. RAIN.
MAX TEMPERATURE.....51-55.
MIN HUMIDITY........90-94 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......BREEZY. SOUTH WINDS 16 TO 26 MPH WITH GUSTS TO
AROUND 46 MPH DECREASING TO 9 TO 14 MPH WITH
GUSTS TO AROUND 28 MPH IN THE AFTERNOON.
RIDGETOP...........SOUTH 21 TO 29 MPH DECREASING TO 16 TO 17 MPH
IN THE AFTERNOON.
MIXING HEIGHT.......2900 FT AGL.
TRANSPORT WINDS.....SOUTH 16 TO 29 MPH DECREASING TO 16 TO 17 MPH
IN THE AFTERNOON.
CWR.................100 PERCENT.
CHANCE OF THUNDER...10 PERCENT.
TIME (PST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY COVER.......CDY CDY CDY CDY CDY CDY CDY CDY CDY CDY CDY CDY
CWR.............100 100 100 100 100 100 100 100 100 100 100 100
CHC OF THDR (%).10 10 10 10 10 10 10 10 10 10 10 10
TEMP............52 52 51 51 51 51 51 51 50 50 50 51
RH..............100 100 99 99 99 99 99 99 99 99 99 98
SL/VL WIND DIR..S S S S S S S S S S S S
SL/VL WIND SPD..25 26 26 26 21 21 21 14 14 14 14 14
SL/VL WIND GUST.44 46 46 46 37 37 37 28 28 28 28 28
RIDGE WIND DIR..S S S S S S S S S S S S
RIDGE WIND SPD..25 29 29 29 21 21 21 17 17 17 16 16
MIX HGT (KFT)...0.7 1.9 1.9 1.9 2.6 2.6 2.6 2.6 2.6 2.6 2.9 2.9
TRANSP WIND DIR.S S S S S S S S S S S S
TRANSP WIND SPD.25 29 29 29 21 21 21 17 17 17 16 16
FORECAST DAYS 3 THROUGH 5
MONDAY
SHOWERS. PERIODS OF MODERATE TO HEAVY RAINFALL. LOWS IN THE UPPER 40S. HIGHS AROUND 50. SOUTH WINDS AROUND
10 TO 15 MPH WITH GUSTS UP TO 20 MPH EARLY, DECREASING TO 5 TO 10 MPH.
TUESDAY
SHOWERS AND A SLIGHT (5-10%) CHANCE OF THUNDERSTORMS. LOWS IN THE MID 40S. HIGHS IN THE LOWER 50S. SOUTHEAST
WINDS AROUND 10 MPH.
WEDNESDAY
SHOWERS. PERIODS OF MODERATE TO HEAVY RAINFALL. 10-15% CHANCE OF THUNDERSTORMS. LOWS IN THE MID 40S. HIGHS IN THE UPPER 40S. SOUTHEAST
WINDS AROUND 18 TO 22 MPH WITH GUSTS 30 TO 40 MPH.
FORECASTER...KF
REQUESTED BY...JASON MILLER
TYPE OF REQUEST...PRESCRIBED
.TAG 2527616.5/STO
.DELDT 12/20/25
.FORMATTERVERSION 2.0.0
.EMAIL JASON.T.MILLER@USDA.GOV,MARK.CRESALIA@USDA.GOV,JAMES.LICO@USDA.GOV,JESSE.STEVENS@USDA.GOV
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