039
FNUS76 KSTO 221957
FWSSTO

Spot Forecast for RUMSEY...CAL FIRE LNU
National Weather Service Sacramento CA
1257 PM PDT Wed Jul 22 2026

Forecast is based on forecast start time of 0600 PDT on July 23.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...
Mostly sunny and clear conditions expected at the Rumsey fire the next
several days. Wind gusts will be weaker Thursday, with an occasional
gust up to 15 to 20 mph in the afternoon and evening from the south.
High pressure is forecast to build in the desert southwest on Thursday
and Friday, with lower daytime humidity values in the teens on Friday and
Saturday. Seasonable high temperatures, along with no precipitation
chances are in the forecast for the next 7 days.

.THURSDAY...

Sky/weather.........Sunny.
Max temperature.....93-97.
Min humidity........25-29 percent.
Wind (20 ft)........
 Slope/valley.......Light winds becoming north up to 6 mph late in
                    the morning, then shifting to the east early in
                    the afternoon shifting to the south 5 to 7 mph
                    late in the afternoon shifting to the
                    southwest.
 Ridgetop...........Southwest 16 to 20 mph.
Mixing height.......5100 ft AGL.
Transport winds.....West around 9 mph shifting to the northwest 6
                    to 7 mph early in the morning, then shifting to
                    the southwest around 7 mph late in the
                    afternoon.
CWR.................0 percent.
Chance of thunder...0 percent.

TIME (PDT)      6 AM      9 AM      NOON      3 PM
Sky cover.......CLEAR     CLEAR     CLEAR     CLEAR
CWR.............0         0         0         0
Chc of thdr (%).0         0         0         0
Temp............61        71        84        93
RH..............87        62        44        30
SL/VL wind......W 3G8     N 5G9     NE 5G9    SE 6G13
Ridgetop wind...SW 16     S 16      S 18      SW 20
Mix hgt (ft)....400       1500      3100      5100
Transport wind..W 9       N 7       NW 6      S 7

.THURSDAY NIGHT...

Sky/weather.........Clear.
Min temperature.....61-65.
Max humidity........65-69 percent.
Wind (20 ft)........
 Slope/valley.......West winds up to 8 mph.
 Ridgetop...........Southwest 18 to 21 mph.
Mixing height.......400 ft AGL.
Transport winds.....West 7 to 10 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.......CLR CLR CLR CLR CLR 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............95  93  90  84  81  78  75  72  69  67  65  64
RH..............27  29  32  36  39  42  46  51  56  59  62  67
SL/VL wind dir..SW  SW  W   W   W   W   W   W   W   W   W   W
SL/VL wind spd..7   7   8   8   8   6   6   6   5   5   5   5
SL/VL wind gust.14  14  16  16  16  12  12  12  9   9   9   9
Ridge wind dir..SW  SW  SW  SW  SW  SW  SW  SW  SW  SW  SW  SW
Ridge wind spd..18  20  20  20  18  18  20  20  21  21  20  20
Mix hgt (kft)...4.5 4.5 0.5 0.5 0.5 0.4 0.4 0.4 0.5 0.5 0.5 0.5
Transp wind dir.W   W   W   W   W   W   W   W   W   W   W   W
Transp wind spd.7   7   10  10  10  10  10  10  10  10  10  9

.FRIDAY...

Sky/weather.........Sunny.
Max temperature.....96-100.
Min humidity........19-23 percent.
Wind (20 ft)........
 Slope/valley.......West winds up to 5 mph early in the morning
                    becoming light, then becoming east 5 to 6 mph
                    late in the morning shifting to the south 5 to
                    7 mph shifting to the southwest 5 to 9 mph late
                    in the afternoon.
 Ridgetop...........South 20 to 24 mph.
Mixing height.......6000 ft AGL.
Transport winds.....West 6 to 9 mph shifting to the southwest 8 to
                    10 mph late in 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.......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............63  65  69  73  79  84  88  92  95  97  98  98
RH..............70  66  58  51  44  37  32  27  24  22  20  20
SL/VL wind dir..W   W   NW  NW  NW  E   E   E   S   S   S   SW
SL/VL wind spd..5   5   3   3   3   6   6   6   7   7   7   9
SL/VL wind gust.9   9   7   7   7   10  10  10  14  14  14  17
Ridge wind dir..SW  S   S   S   S   S   S   S   S   S   S   S
Ridge wind spd..20  20  21  22  22  23  24  24  24  23  23  22
Mix hgt (kft)...0.5 0.5 0.6 0.6 0.6 2.6 2.6 2.6 5.2 5.2 5.2 6.0
Transp wind dir.W   W   NW  NW  NW  W   W   W   SW  SW  SW  SW
Transp wind spd.9   9   7   7   7   6   6   6   8   8   8   10

$$
Forecaster...JW
Requested by...FC IACOVIELLO
Type of request...WILDFIRE
.TAG 2617847.2/STO
.DELDT 07/22/26
.FormatterVersion 2.0.0
.EMAIL robert.wettstein@fire.ca.gov,christopher.taylor@fire.ca.gov,lnueccstaff@fire.ca.gov,tony.aston@fire.ca.gov