Spot Forecast
Issued by NWS Sacramento, CA
Issued by NWS Sacramento, CA
445
FNUS76 KSTO 290103
FWSSTO
Spot Forecast for Big Hill 69...USFS
National Weather Service Sacramento CA
603 PM PDT Sun Sep 28 2025
Forecast is based on ignition time of 0700 PDT on September 30.
If conditions become unrepresentative...contact the National Weather
Service.
...Isolated Thunderstorms on Tuesday...
.DISCUSSION...
A pattern change will bring chances for showers and thunderstorms,
breezy winds, increased humidity, and cooler temperatures to the
prescribed burn area early to mid-week. Current forecast show a
50-70% chance of 0.50" inches or greater Monday into Wednesday
night. Thunderstorm chances will be around 10% on Tuesday.
Lingering showers are possible Thursday morning, otherwise drier
conditions return late week. Periods of gusty southwest winds are
expected through the middle of the week, with gusts up to 20-25
mph. Strongest winds are anticipated on Tuesday.
.TUESDAY...
Sky/weather.........Partly sunny. Chance of rain showers.
Max temperature.....44-48.
Min humidity........82-86 percent.
Wind (20 ft)........
Slope/valley.......South to southwest winds 10 to 15 mph with gusts
up to around 20 mph.
Ridgetop...........South 14 to 20 mph shifting to the southwest
in the afternoon. Gusts up to 25 mph.
Mixing height.......Rising to around 2300 ft AGL by the afternoon.
Transport winds.....South 15 to 20 mph shifting to the southwest
around 25 mph in the afternoon.
CWR.................23 percent decreasing to 12 percent late in the
morning.
Chance of thunder...11 percent.
TIME (PDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky cover.......MC MC MC MC MC MC MC MC MC MC MC
CWR.............20 20 20 20 10 10 10 10 10 10 10
Chc of thdr (%).0 10 10 10 10 10 10 10 10 10 0
Temp............45 44 44 44 44 44 45 45 45 44 43
RH..............86 87 90 93 94 92 89 87 89 91 94
SL/VL wind dir..S S S S SW SW SW SW SW SW SW
SL/VL wind spd..14 14 14 14 14 14 14 12 12 12 10
SL/VL wind gust.18 20 20 20 23 23 23 23 23 23 21
Ridge wind dir..S S S S S S S SW SW SW SW
Ridge wind spd..14 14 14 14 21 21 21 25 25 25 24
Mix hgt (kft)...0.1 0.8 0.8 0.8 1.6 1.6 1.6 2.3 2.3 2.3 1.6
Transp wind dir.S S S S S S S SW SW SW SW
Transp wind spd.14 14 14 14 21 21 21 25 25 25 24
.TUESDAY NIGHT...
Sky/weather.........Mostly cloudy. Chance of rain showers in the
evening, then slight chance of rain showers
late in the evening. Chance of rain showers
early in the morning.
Min temperature.....40-44.
Max humidity........92-97 percent.
Wind (20 ft)........
Slope/valley.......Southwest winds 5 to 15 mph with gusts
up to around 20 mph.
Ridgetop...........Southwest 14 to 20 mph with gusts around 25 mph
decreasing to 13 to 16 mph early in the evening.
Mixing height.......0 ft AGL.
Transport winds.....Southwest 15 to 25 mph shifting to the south
around 15 mph early in the morning.
CWR.................7 percent increasing to 19 percent early in the
morning.
Chance of thunder...4 percent.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky cover.......MC MC MC MC MC MC MC MC MC MC MC MC
CWR.............10 10 10 10 10 10 10 10 10 10 10 20
Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0
Temp............43 42 42 43 44 45 46 47 47 47 47 47
RH..............95 95 94 92 88 85 82 79 77 78 80 82
SL/VL wind dir..SW SW SW SW SW SW SW SW S S S S
SL/VL wind spd..10 10 12 12 12 15 15 15 14 14 14 13
SL/VL wind gust.21 21 20 20 20 23 23 23 20 20 20 16
Ridge wind dir..SW SW SW SW SW SW SW SW S S S S
Ridge wind spd..24 24 13 13 13 16 16 16 15 15 15 14
Mix hgt (kft)...1.6 1.6 1.0 1.0 1.0 0.1 0.1 0.1 0.1 0.1 0.1 0.1
Transp wind dir.SW SW SW SW SW SW SW SW S S S S
Transp wind spd.24 24 13 13 13 16 16 16 15 15 15 14
.WEDNESDAY...
Sky/weather.........Mostly cloudy. Chance of rain showers.
Max temperature.....46-50.
Min humidity........80-84 percent.
Wind (20 ft)........
Slope/valley.......South winds 5 to 13 mph with gusts up to 20 mph.
Ridgetop...........South 13 to 17 mph.
Mixing height.......1000 ft AGL.
Transport winds.....South 13 to 17 mph.
CWR.................23 percent increasing to 29 percent late in the
afternoon.
Chance of thunder...6 percent.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky cover.......MC MC MC MC MC MC MC MC MC MC MC MC
CWR.............20 20 20 20 20 20 20 20 20 20 20 30
Chc of thdr (%).0 0 0 0 0 10 10 10 10 10 10 0
Temp............46 45 44 44 44 44 45 45 46 45 44 44
RH..............82 83 84 88 93 97 97 95 93 92 92 92
SL/VL wind dir..S S S S S S S S SW SW SW SW
SL/VL wind spd..13 13 13 13 13 12 12 12 9 9 9 8
SL/VL wind gust.16 16 17 17 17 20 20 20 18 18 18 16
Ridge wind dir..S S S S S S S S S S S SW
Ridge wind spd..14 14 13 13 13 15 15 15 15 15 15 17
Mix hgt (kft)...0.1 0.1 0.4 0.4 0.4 1.0 1.0 1.0 1.0 1.0 1.0 1.0
Transp wind dir.S S S S S S S S S S S SW
Transp wind spd.14 14 13 13 13 15 15 15 15 15 15 17
.FORECAST DAYS 3 THROUGH 7...
.THURSDAY...
Mostly cloudy. Chance of showers. Lows in the lower 40s. Highs in
the upper 40s. South winds around 10 mph.
.FRIDAY...
Partly cloudy. Lows in the upper 30s. Highs in the mid 50s. South
winds around 7 mph.
.SATURDAY...
Mostly clear. Lows in the lower 40s. Highs in the upper 50s.
Northeast winds around 10 mph.
.SUNDAY...
Mostly clear. Lows in the lower 40s. Highs in the upper 50s.
.MONDAY...
Lows in the lower 40s.
.OUTLOOK FOR TUESDAY OCTOBER 07 THROUGH MONDAY OCTOBER 13...
The Climate Prediction Center`s 8-14 Day outlook favors near
normal temperatures and near normal precipitation for early
October.
$$
Forecaster...IDS
Requested by...Chris Enriquez
Type of request...PRESCRIBED
.TAG 2522031.6/STO
.DELDT 09/29/25
.FormatterVersion 2.0.0
.EMAIL Christian.enriquez@usda.gov