Suppression Forecast
Issued by NWS Billings, MT

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000
FNUS75 KBYZ 181139
FWSBYZ

Spot Forecast for Porcupine Rx...USFS
National Weather Service Billings MT
539 AM MDT Wed Oct 18 2017

Forecast is based on ignition time of 0900 MDT on October 18.
If conditions become unrepresentative...contact the National Weather
Service.

Please contact our office if you have questions
or concerns with this forecast.

.DISCUSSION...

Expect mostly clear conditions at the burn site today and
Thursday, with highs in the 50s each day. Expect to see mainly
terrain driven local winds each day, with much stronger ridgetop
winds. Peak diurnal heating may allow southwest winds with gusts
approaching 20 mph in the late afternoon. A wetter and more
unsettled weather pattern is expected into the burn site
beginning Friday morning.

.REST OF TODAY...

Sky/weather.........Mostly sunny.
LAL.................1...no thunderstorms.
Max temperature.....54-59.
Min humidity........32-37 percent.
Wind (20 ft)........
 Slope/valley.......Mainly Light and Terrain Driven Winds 5 to 10 mph,
                    becoming Southwest winds 5 to 15 mph with higher
                    gusts at peak heating.
 Ridgetop...........West 20 to 35 mph.
Mixing height.......900 ft AGL late in the morning...increasing to
                    5500 ft AGL in the afternoon.
Transport winds.....Southwest 25 to 35 mph.
Haines index........3.
CWR.................0 percent.

.TONIGHT...

Sky/weather.........Partly cloudy.
LAL.................1...no thunderstorms.
Min temperature.....32-37.
Max humidity........70-75 percent.
Wind (20 ft)........
 Slope/valley.......Light and Terrain Driven Winds  5 to 10 mph.
 Ridgetop...........Southwest 30 to 45 mph.
Mixing height.......5500 ft AGL in the evening...decreasing to 1000
                    ft AGL overnight.
Transport winds.....Southwest 15 to 25 mph.
CWR.................0 percent.

.THURSDAY...

Sky/weather.........Sunny.
LAL.................1...no thunderstorms.
Max temperature.....59-64.
Min humidity........25-30 percent.
Wind (20 ft)........
 Slope/valley.......Mainly Light and Terrain Driven Winds 5 to 10 mph,
                    becoming Southwest winds 5 to 15 mph with higher
                    gusts at peak heating.
 Ridgetop...........Southwest 25 to 40 mph.
Mixing height.......1000 ft AGL in the morning...increasing to 4600
                    ft AGL in the afternoon.
Transport winds.....South 15 to 25 mph.
Haines index........4.
CWR.................0 percent.

$$
Forecaster...Gilstad
Requested by...Sarah Pelkey
Type of request...PRESCRIBED
.TAG 1717411.0/BYZ
.EMAIL pelkeysa@gmail.com



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