Spot Forecast
Issued by NWS Sacramento, CA
Issued by NWS Sacramento, CA
229
FNUS76 KSTO 280416
FWSSTO
Spot Forecast for 5-4...CAL FIRE - Shasta Trinity Unit
National Weather Service Sacramento CA
916 PM PDT Wed Aug 27 2025
Forecast is based on forecast start time of 2100 PDT on August 27.
If conditions become unrepresentative...contact the National Weather
Service.
.DISCUSSION...
Showers and thunderstorm potential has trended down for the
evening with thunderstorms not expected for Thursday and Friday
near the fire. Conditions trend drier heading into the weekend
with daytime humidities in the upper teens to low 20s. Light
winds expected through tomorrow morning before south winds return
in the afternoon with gusts up to 15-20 mph.
.REST OF TONIGHT...
Sky/weather.........Clear.
Min temperature.....58-62.
Max humidity........50-54 percent.
Wind (20 ft)........
Slope/valley.......Light winds shifting to the northeast early
in the morning.
Mixing height.......0 ft AGL.
Transport winds.....Southeast 6 to 7 mph shifting to the northeast
around 6 mph overnight.
CWR.................1 percent.
Chance of thunder...2 percent.
TIME (PDT) 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky cover.......MCR CLR CLR CLR CLR CLR CLR CLR CLR
CWR.............0 0 0 0 0 0 0 0 0
Chc of thdr (%).0 0 0 0 0 0 0 0 0
Temp............72 71 69 68 66 64 63 62 62
RH..............40 41 43 46 48 49 49 50 46
SL/VL wind dir..S SE SE E E NE NE NE E
SL/VL wind spd..3 3 3 3 3 5 5 5 5
SL/VL wind gust.7 7 7 7 6 6 6 6 7
Mix hgt (kft)...0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
Transp wind dir.S S SE E E E E E E
Transp wind spd.7 7 6 6 6 6 6 6 6
.THURSDAY...
Sky/weather.........Sunny.
Max temperature.....78-82.
Min humidity........18-22 percent.
Wind (20 ft)........
Slope/valley.......Northeast winds up to 5 mph early in the
morning becoming light, then becoming south
up to 7 mph in the afternoon with gusts up to
15 mph.
Mixing height.......4500 ft AGL.
Transport winds.....East around 6 mph shifting to the south 8 to 9
mph late in the morning.
CWR.................0 percent.
Chance of thunder...0 percent.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky cover.......MCR MCR CLR CLR CLR CLR CLR CLR CLR CLR CLR CLR
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0
Temp............62 62 61 63 68 71 74 76 77 79 79 80
RH..............46 46 46 43 36 31 30 25 23 21 21 20
SL/VL wind dir..NE N NE E E SE SE S S S S S
SL/VL wind spd..5 5 5 3 3 3 5 6 6 6 6 5
SL/VL wind gust.7 7 7 7 8 9 9 10 12 12 12 10
Mix hgt (kft)...0.1 0.1 0.7 0.7 0.7 2.6 2.6 2.6 4.5 4.5 4.5 2.8
Transp wind dir.E E SE SE SE S S S S S S S
Transp wind spd.6 6 6 6 6 9 9 9 9 9 9 8
.THURSDAY NIGHT...
Sky/weather.........Clear.
Min temperature.....59-63.
Max humidity........40-44 percent.
Wind (20 ft)........
Slope/valley.......Southeast winds up to 5 mph early in the
evening becoming light and north
up to 6 mph by late in the evening.
Mixing height.......0 ft AGL.
Transport winds.....South 5 to 10 mph shifting to the north 5 to
8 mph late in the evening and through the
early morning.
CWR.................0 percent.
Chance of thunder...0 percent.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky cover.......CLR CLR MCR MCR MCR CLR CLR CLR CLR CLR CLR MCR
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0
Temp............78 78 75 72 70 69 67 66 64 63 62 62
RH..............22 24 26 30 32 33 34 35 36 36 36 36
SL/VL wind dir..SE SE SE SE SE NW N N N N N N
SL/VL wind spd..5 5 2 2 2 5 5 5 6 6 6 6
SL/VL wind gust.10 10 6 6 6 7 7 7 8 8 8 8
Mix hgt (kft)...2.8 2.8 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
Transp wind dir.S S S S S NW N N N N N N
Transp wind spd.8 8 5 5 5 5 5 5 6 6 6 6
.FRIDAY...
Sky/weather.........Sunny.
Max temperature.....79-83.
Min humidity........19-23 percent.
Wind (20 ft)........
Slope/valley.......North winds 4 to 7 mph in the morning becoming
light, then becoming south 5 to 8 mph late in
the afternoon with gusts up to 15 mph.
Mixing height.......8500 ft AGL.
Transport winds.....North around 6 mph shifting to the south 7 to
8 mph late in the morning.
CWR.................0 percent.
Chance of thunder...0 percent.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky cover.......MCR MCR MCR MCR MCR MCR MCR MCR MCR MCR MCR MCR
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0
Temp............61 61 63 65 69 72 75 77 79 80 81 80
RH..............38 40 41 38 34 30 27 24 22 21 20 21
SL/VL wind dir..N N N N N SE SE SE S S S S
SL/VL wind spd..6 6 6 6 6 3 3 3 6 6 6 6
SL/VL wind gust.8 8 8 8 8 8 8 8 13 13 13 12
Mix hgt (kft)...0.1 0.1 0.1 0.1 0.1 3.2 3.2 3.2 6.7 6.7 6.7 8.5
Transp wind dir.N N NE NE NE S S S S S S S
Transp wind spd.6 6 6 6 6 7 7 7 8 8 8 8
.FORECAST DAYS 3 THROUGH 5...
.SATURDAY...
Mostly clear. Lows in the upper 50s. Highs in the lower 80s. West
winds around 5 mph.
.SUNDAY...
Mostly clear. Lows around 60. Highs in the lower 80s. West winds
around 6 mph.
.LABOR DAY...
Mostly clear. Lows in the lower 60s. Highs in the lower 80s. West
winds around 5 mph.
$$
Forecaster...DA
Requested by...Aaron Williams
Type of request...WILDFIRE
.TAG 2520875.0/STO
.DELDT 08/27/25
.FormatterVersion 2.0.0
.EMAIL SHUECCStaff