312
FNUS76 KSTO 171751
FWSSTO

Spot Forecast for Twain Incident...US Forest Service
National Weather Service Sacramento CA
1051 AM PDT Fri Jul 17 2026

Forecast is based on forecast start time of 0700 PDT on July 18.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...
Mostly sunny with dry conditions continuing for the Twain Incident
next few days. General, terrain driven winds from the southwest in
the forecast, with occasional gusts up to around 15 mph today and
Sunday. Seasonable high temperatures remain in the forecast as well.
Monsoonal moisture will move into the region Sunday, raising
daytime humidity values, as well as increase overnight recoveries.
While moisture will move into the area, the best chances for
precipitation and thunderstorms still look to remain south of the
Twain Incident. Still, around a 5% chance of an afternoon rain shower
or thunderstorm will be in the forecast beginning Monday through
the middle of next week.

.SATURDAY...

Sky/weather.........Sunny.
Max temperature.....91-95.
Min humidity........17-21 percent.
Wind (20 ft)........
 Slope/valley.......Light winds becoming southwest up to 5 mph late
                    in the afternoon, then becoming light late in
                    the afternoon.
 Ridgetop...........South 15 to 22 mph.
Mixing height.......6500 ft AGL.
Transport winds.....East around 3 mph shifting to the south 5 to 14
                    mph early in the morning.
CWR.................0 percent.
Chance of thunder...0 percent.

TIME (PDT)      7 AM      10 AM     1 PM      4 PM
Sky cover.......MCLEAR    MCLEAR    CLEAR     CLEAR
CWR.............0         0         0         0
Chc of thdr (%).0         0         0         0
Temp............58        77        91        93
RH..............53        30        20        20
SL/VL wind......N 0G2     SE 1G5    S 3G12    SW 5G14
Ridgetop wind...S 22      S 17      S 16      SW 15
Mix hgt (ft)....400       1800      6100      6500
Transport wind..E 3       S 5       S 14      S 14

.SATURDAY NIGHT...

Sky/weather.........Clear then becoming partly cloudy.
Min temperature.....57-61.
Max humidity........59-63 percent.
Wind (20 ft)........
 Slope/valley.......Light winds.
 Ridgetop...........Southwest 15 to 18 mph.
Mixing height.......300 ft AGL.
Transport winds.....Southwest 3 to 12 mph shifting to the northeast
                    around 3 mph overnight.
CWR.................1 percent.
Chance of thunder...2 percent.

TIME (PDT)      6 PM      9 PM      MIDNGT    3 AM
Sky cover.......CLEAR     PCLDY     PCLDY     PCLDY
CWR.............0         0         0         0
Chc of thdr (%).0         0         0         0
Temp............90        77        67        62
RH..............22        37        51        58
SL/VL wind......SW 3G13   SW 1G5    N 0G2     N 0G1
Ridgetop wind...SW 16     SW 17     SW 15     SW 15
Mix hgt (ft)....4900      500       300       400
Transport wind..SW 12     SW 6      SW 3      NE 3

.SUNDAY...

Sky/weather.........Mostly sunny.
Max temperature.....93-97.
Min humidity........17-21 percent.
Wind (20 ft)........
 Slope/valley.......Light winds becoming southwest up to 5 mph late
                    in the afternoon.
 Ridgetop...........South 9 to 15 mph.
Mixing height.......7800 ft AGL.
Transport winds.....Northeast around 3 mph shifting to the
                    southwest 6 to 12 mph late in the morning.
CWR.................0 percent.
Chance of thunder...0 percent.

TIME (PDT)      6 AM      9 AM      NOON      3 PM
Sky cover.......PCLDY     PCLDY     PCLDY     PCLDY
CWR.............0         0         0         0
Chc of thdr (%).0         0         0         0
Temp............59        69        88        94
RH..............65        49        24        18
SL/VL wind......N 0G1     N 0G2     N 0G3     SW 2G9
Ridgetop wind...S 15      S 15      S 13      S 9
Mix hgt (ft)....400       500       4100      7800
Transport wind..N 3       NE 3      SW 6      SW 10

$$
Forecaster...JW
Requested by...E. Badalamenti
Type of request...WILDFIRE
.TAG 2617242.5/STO
.DELDT 07/17/26
.FormatterVersion 2.0.0
.EMAIL brett.loomis@usda.gov,isabella.giacomangeli@usda.gov,james.lico@usda.gov,Jordan.wade@usda.gov,edward.badalamenti@usda.gov,joseph.mcginn@usda.gov