Suppression Forecast
Issued by NWS Riverton, WY

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000
FNUS75 KRIW 121100
FWSRIW

Spot Forecast for South Pass Aspen Pile Burn...BLM CAD
National Weather Service Riverton WY
400 AM MST Tue Dec 12 2017

Forecast is based on ignition time of 0800 MST on December 12.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...

Smoke dispersal is expected to remain poor today and Wednesday.
Mild for middle of December along with low RH and sunny skies are
expected today. High temperatures on Wednesday are expected to be
10 to 15 degrees cooler in wake of cold front late tonight into
Wednesday morning along with increasing surface RH. There will be
a chance of snow Wednesday into Wednesday night, but little or no
snow accumulation is expected at this time. A better shot of
snowfall will occur Friday night into the day Saturday.

...Thunderstorms imply strong gusty and erratic winds...
...Haines index is high level haines both day and night...

FORECASTER...Murrell

.TODAY...

Sky/weather.........Sunny (0-5 percent).
Max temperature.....45-50.
Min humidity........20 percent.
20-foot winds.......Light and Variable 3-6 mph becoming west
                    to northwest around 5 mph in the afternoon.
Ridge top winds.....West northwest 5-10 mph becoming
                    Northwest 10-15 mph by noon.
Mixing height.......1500-2000 ft AGL.
Transport winds.....Northwest 10-15 mph.
Smoke dispersal.....Poor.

.TONIGHT...

Sky/weather.........Clear (0-5 percent) then becoming partly cloudy
                    (40-50 percent).
Min temperature.....30.
Max humidity........40 percent.
20-foot winds.......Downslope/downvalley 4-7 mph.
Ridge top winds.....Northwest 10-15 mph shifting to the north
                    around 10 mph after midnight.
Mixing height.......500 ft AGL.
Transport winds.....Northwest to north 5-10 mph.
Smoke dispersal.....Poor.

.WEDNESDAY...

Sky/weather.........Mostly cloudy (65-80 percent) with a slight
                    chance of snow.
Max temperature.....30-35.
Min humidity........25-30 percent early then increasing to
                    50+ percent in the afternoon.
20-foot winds.......North to Northwest 5-10 mph.
Ridge top winds.....North around 10 mph.
Mixing height.......1800 ft AGL.
Transport winds.....North 5-10 mph.
Smoke dispersal.....Poor.


.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY NIGHT...
Mostly cloudy with a slight chance of snow. Lows around 20. Winds
generally less than 10 mph.

.THURSDAY...
Clear. Highs in the lower 30s. Winds generally less than 10 mph.

.FRIDAY...
Partly cloudy. Lows in the lower 20s. Highs in the lower 40s.
West winds around 15 mph.

.SATURDAY...
Colder. Mostly cloudy with a chance of snow. Lows in the lower
20s. Highs in the upper 20s. Northwest winds around 15 mph.

$$
Forecaster...Murrell
Requested by...Orin Hutchinson
Type of request...PRESCRIBED
.TAG 1719607.2/RIW
.EMAIL ohutchinson@blm.gov



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