455
FNUS76 KSTO 210146
FWSSTO

Spot Forecast for RUMSEY...CAL FIRE LNU
National Weather Service Sacramento CA
646 PM PDT Mon Jul 20 2026

Forecast is based on forecast start time of 0600 PDT on July 21.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...
Light winds becoming breezy south to west winds in the afternoon
with gusts up to 15-20 mph. Wednesday will see slightly stronger
afternoon winds with gusts up to 20-25 mph. Chances for isolated
showers and virga throughout most of Tuesday with best chances to
see a shower developing Tuesday early afternoon with
thunderstorms not expected at this time and convective activity
forecasted further west than the burn area.

Afternoon highs are expected to warm to near triple digits with
mid 90s to slight over 100 expected throughout much of the week.
Slight uptick in afternoon humidities to mid 20s on Tuesday,
increasing to low 30s Wednesday-Thursday.

.TUESDAY...

Sky/weather.........Sunny.
Max temperature.....96-100.
Min humidity........24-28 percent.
Wind (20 ft)........
 Slope/valley.......Light winds becoming southwest 5 to 10 mph in
                    the afternoon.
 Ridgetop...........Northwest 4 to 7 mph shifting to the southwest
                    7 to 11 mph by the afternoon.
Mixing height.......5800 ft AGL.
Transport winds.....Northwest 4 to 7 mph shifting to the southwest
                    6 to 10 mph late in the morning.
CWR.................1 percent.
Chance of thunder...0 percent.

TIME (PDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky cover.......PC  MCR MCR CLR CLR MCR MCR MCR PC  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............72  74  78  81  85  87  89  92  94  96  98  97
RH..............49  47  42  37  33  31  30  29  27  27  26  26
SL/VL wind dir..NW  NW  N   N   N   SW  SW  SW  SW  SW  SW  W
SL/VL wind spd..3   3   3   3   5   6   5   5   6   6   6   7
SL/VL wind gust.6   6   6   7   8   9   10  10  12  12  13  14
Ridge wind dir..NW  NW  N   N   N   SW  SW  SW  SW  SW  SW  W
Ridge wind spd..7   7   6   6   6   6   6   6   6   7   8   10
Mix hgt (kft)...0.5 0.5 1.3 1.3 1.3 3.2 3.2 3.2 5.8 5.8 5.8 4.6
Transp wind dir.NW  NW  N   N   N   SW  SW  SW  SW  SW  SW  W
Transp wind spd.7   7   6   6   6   6   6   6   6   6   6   8

.TUESDAY NIGHT...

Sky/weather.........Mostly clear.
Min temperature.....71-75.
Max humidity........42-46 percent.
Wind (20 ft)........
 Slope/valley.......South to west winds 4 to 7 mph.
 Ridgetop...........South to west 8 to 12 mph.
Mixing height.......500 ft AGL.
Transport winds.....South to west 8 to 12 mph.
CWR.................0 percent.
Chance of thunder...0 percent.

TIME (PDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky cover.......MCR MCR MCR MCR MCR 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............97  96  93  90  88  86  84  82  80  77  76  75
RH..............26  26  27  29  29  30  31  34  36  39  41  44
SL/VL wind dir..SW  SW  SW  SW  SW  W   W   W   W   W   W   W
SL/VL wind spd..7   7   7   7   7   6   6   6   5   5   5   5
SL/VL wind gust.14  14  15  15  15  13  13  13  10  10  10  8
Ridge wind dir..SW  SW  SW  SW  SW  W   W   W   W   W   W   W
Ridge wind spd..8   8   12  12  12  12  12  12  10  10  10  9
Mix hgt (kft)...4.6 4.6 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
Transp wind dir.SW  SW  SW  SW  SW  W   W   W   W   W   W   W
Transp wind spd.8   8   12  12  12  12  12  12  10  10  10  9

.WEDNESDAY...

Sky/weather.........Sunny.
Max temperature.....94-98.
Min humidity........32-36 percent.
Wind (20 ft)........
 Slope/valley.......West winds up to 5 mph early in the morning
                    becoming light, then becoming southwest 7
                    to 12 mph by the early afternoon with gusts
                    up to 15-25 mph.
 Ridgetop...........West 5 to 10 mph shifting to the southwest
                    and increasing to 10 to 15 mph by the
                    afternoon.
Mixing height.......5900 ft AGL.
Transport winds.....West 5 to 10 mph shifting to the southwest
                    and increasing to 10 to 15 mph by the
                    afternoon.
CWR.................0 percent.
Chance of thunder...0 percent.

TIME (PDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky cover.......CLR CLR CLR CLR CLR CLR CLR CLR CLR CLR CLR CLR
Temp............73  75  79  82  86  90  92  94  94  95  95  94
RH..............47  46  42  39  37  35  34  34  34  34  34  35
SL/VL wind dir..W   W   SW  SW  SW  S   S   S   S   S   S   SW
SL/VL wind spd..5   5   3   3   3   7   7   7   12  12  12  12
SL/VL wind gust.8   8   6   6   6   12  12  12  21  21  21  22
Ridge wind dir..W   W   W   W   W   S   S   S   S   S   S   SW
Ridge wind spd..9   9   7   7   7   7   7   7   12  12  12  15
Mix hgt (kft)...0.5 0.5 0.8 0.8 0.8 3.9 3.9 3.9 5.9 5.9 5.9 4.5
Transp wind dir.W   W   W   W   W   S   S   S   S   S   S   SW
Transp wind spd.9   9   7   7   7   7   7   6   11  12  12  14

.FORECAST DAYS 3 THROUGH 5...
.THURSDAY...
Clear. Lows in the upper 60s. Highs in the mid 90s. Southwest
winds around 7 mph.
.FRIDAY...
Clear. Lows in the upper 60s. Highs in the upper 90s. West winds
around 6 mph.
.SATURDAY...
Clear. Lows in the upper 60s. Highs in the upper 90s. West winds
around 6 mph.

$$
Forecaster...DA
Requested by...FC IACOVIELLO
Type of request...WILDFIRE
.TAG 2617847.0/STO
.DELDT 07/20/26
.FormatterVersion 2.0.0
.EMAIL lnueccstaff@fire.ca.gov,tony.aston@fire.ca.gov,robert.wettstein@fire.ca.gov,christopher.taylor@fire.ca.gov