Suppression Forecast
Issued by NWS Spokane, WA

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FNUS76 KOTX 240128
FWSOTX

Spot Forecast for DIRTY SHIRT...USFS
National Weather Service Spokane WA
628 PM PDT Sun Jul 23 2017

Forecast is based on request time of 1900 PDT on July 23.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...

...Dry cold front passage this evening...

Winds will shift to the northwest and increase near 9 pm as a dry
cold front passes. The winds will be their strongest from 9pm-11pm
tonight and the winds will shift towards the north overnight. The
winds will remain elevated through the overnight hours on ridgetops.
Humidity recovery will be poor tonight and the atmosphere will be
unstable as signified with the Haines Index of 5 which is moderate
for tonight. The winds will decrease towards Monday afternoon.
Smoke from fires in Central and Southern British Columbia may be
transported to the fire overnight and linger overhead tomorrow
morning. The rest of the week will be warm and dry.

.TONIGHT...

Sky/weather.........Mostly clear. Areas of smoke.
CWR.................0 percent.
LAL.................1.
Min temperature.....Around 54.
Max humidity........40 percent.
Wind (20 ft)........Southwest winds 7 to 11 mph in the evening
                    shifting to the north 9 to 13 mph. Wind gusts
                    to 30 mph between 9 pm and midnight.
Mixing height.......2900 ft AGL in the evening...becoming near
                    less than 1500 feet agl overnight.
Transport winds.....Northwest 14 to 18 mph.
Haines Index........5 moderate.

.MONDAY...

Sky/weather.........Sunny. Areas of smoke.
CWR.................0 percent.
LAL.................1.
Max temperature.....77.
Min humidity........20 percent.
Wind (20 ft)........Northwest winds 6 to 11 mph.
Mixing height.......less than 1500 feet AGL in the morning...becoming 5000 ft
                    AGL in the afternoon.
Transport winds.....Northwest 9 to 13 mph.
Haines Index........4 low.

.MONDAY NIGHT...

Sky/weather.........Mostly clear.
CWR.................0 percent.
LAL.................1.
Min temperature.....49.
Max humidity........65 percent.
Wind (20 ft)........Northwest winds 5 to 7 mph.
Mixing height.......2400 ft AGL in the evening...becoming near
                    surface overnight.
Transport winds.....Northwest 10 to 14 mph.
Haines Index........4 low.

.TUESDAY...

Sky/weather.........Sunny.
CWR.................0 percent.
LAL.................1.
Max temperature.....81.
Min humidity........20 percent.
Wind (20 ft)........North winds 4 to 8 mph in the morning becoming
                    upslope/upvalley 2 to 5 mph in the afternoon.
Mixing height.......Near surface in the morning...becoming 7000 ft
                    AGL in the afternoon.
Transport winds.....North 4 to 8 mph.
Haines Index........4 low.

$$
Forecaster...RP
Requested by...BLAKE LINDSAY
Type of request...WILDFIRE
.TAG 1713246.0/OTX



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