695
FNUS75 KBOI 211805
FWSBOI

Spot Forecast for CROOKED...USFS
National Weather Service Boise ID
1205 PM MDT Fri Aug 21 2026

Forecast is based on forecast start time of 1200 MDT on August 21.
If conditions become unrepresentative...contact the National Weather
Service.

Please contact our office at (208)334-9060, if you have questions
or concerns with this forecast.

...HOT AND DRY TODAY...
...POSSIBLE STRONG OUTFLOW GUSTS THIS EVENING...
...SLIGHT CHANCE OF STORMS TOMORROW EVENING...

.DISCUSSION...
Temperatures climb to near triple digits this afternoon as
prevailing winds remain a steady 10 mph out of the southwest. This
evening and early tonight showers moving from south to north
across the region could produce strong outflow gusts near 35 to 55
mph. Strongest winds will occur along ridges and N-S facing
valleys. Winds, if they form, would move through the fire location
around 7 to 10PM LT. Winds mostly calm overnight, but isolated
showers could continue to form and produce locally strong wind
gusts. A cold front tomorrow drops temperatures about 10 degrees
from today and brings an increased chance of thunderstorms.
Thunderstorms Saturday evening could produce heavy rainfall,
abundant lightning, and outflow winds 35 to 45 mph. Following the
front on Sunday, sustained winds increase to 15 mph with gusts up
to 25 mph.

.REST OF TODAY...

Sky/weather.........Partly sunny.
Max temperature.....93 to 100.
Min humidity........9 to 14 percent.
CWR.................0 percent.
Wind - 20 foot......Southwest 3 to 7 mph.
Mixing height.......12500 ft AGL.
Transport winds.....Southwest around 10 mph.
Ventilation Index...1250 excellent.

.TONIGHT...

Sky/weather.........Cloudy with scattered showers in the evening
                    becoming isolated overnight.
Min temperature.....62 to 67.
Max humidity........47 to 52 percent.
CWR.................10 percent.
Wind - 20 foot......Southwest 3 to 9 mph becoming downslope 4 to 10
                    mph after midnight. Winds near showers could
                    be as high as 18 to 26 mph sustained with gusts
                    35 to 55 mph.
Mixing height.......200 ft AGL.
Transport winds.....East around 10 mph.
Ventilation Index...20 poor.

.SATURDAY...

Sky/weather.........Partly sunny with isolated thunderstorms.
Max temperature.....85 to 91.
Min humidity........18 to 23 percent.
CWR.................5 percent.
Wind - 20 foot......East around 5 mph in the morning shifting to
                    the southwest around 6 mph in the afternoon.
                    Erratic outflow gusts near storms up to 45 mph.
Mixing height.......10500 ft AGL.
Transport winds.....Southwest around 15 mph.
Ventilation Index...1575 excellent.

$$
Forecaster...Macfarlane
Requested by...BOISE DISPATCH
Type of request...WILDFIRE
.TAG 2620056.1/BOI
.DELDT 08/21/26
.FormatterVersion 2.0.0
.EMAIL JOY.ABNER@USDA.GOV,IDBDC@FIRENET.GOV