Suppression Forecast
Issued by NWS Riverton, WY

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000
FNUS75 KRIW 231531
FWSRIW

Spot Forecast for Canyon Pile Burning...NPS YNP
National Weather Service Riverton WY
931 AM MDT Mon Oct 23 2017

Forecast is based on ignition time of 1000 MDT on October 23.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...

High pressure will dominate the weather for the next few days and
bring dry weather. Winds will be largely diurnal day with a bit of
a west component later this afternoon with a few gusts to 20 mph
at times. Wind should be largely diurnal tonight and Tuesday before
somewhat stronger winds move in Wednesday ahead of a cold front.

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

FORECASTER...Hattings

.REST OF TODAY...

Sky/weather.........Partly cloudy (25-35 percent).
Max temperature.....38-42.
Min humidity........45-50 percent.
20-foot winds.......Upslope/upvalley 7 to 14 mph.
Ridge top winds.....West 10 to 20 mph.
LAL.................No Tstms.
Chc of wetting rain.Zero percent.
Haines Index........2 or very low potential for large plume
                    dominated fire growth.
Mixing height.......2000 ft AGL until 1200, then 4100 ft AGL.
Transport winds.....Northwest 10 to 20 mph.
Smoke dispersal.....Fair to good.

.TONIGHT...

Sky/weather.........Mostly clear (20-30 percent).
Min temperature.....20-24.
Max humidity........85-90 percent.
20-foot winds.......Downslope/downvalley 5 to 10 mph. Gusts up to 15
                    mph in the evening.
Ridge top winds.....West 10 to 15 mph.
LAL.................No Tstms.
Chc of wetting rain.Zero percent.
Haines Index........2 or very low potential for large plume
                    dominated fire growth.
Mixing height.......500-1500 ft AGL.
Transport winds.....West 9 to 14 mph.
Smoke dispersal.....Poor to fair.

.TUESDAY...

Sky/weather.........Sunny (5-15 percent).
Max temperature.....Around 50.
Min humidity........35 to 40 percent.
20-foot winds.......Upslope/upvalley 5 to 10 mph.
Ridge top winds.....Southwest 7 to 14 mph.
LAL.................No Tstms.
Chc of wetting rain.Zero percent.
Haines Index........3 or very low potential for large plume
                    dominated fire growth.
Mixing height.......500 FT AGL until 1200, then 3300 ft AGL.
Transport winds.....South 8 to 9 mph shifting to the northwest 12
                    to 13 mph in the afternoon.
Smoke dispersal.....Poor to good.

.FORECAST DAYS 3 THROUGH 5...
.TUESDAY NIGHT...
Clear. Lows in the lower 20s. Winds generally less than 10 mph.
.WEDNESDAY...
Partly cloudy. Lows in the lower 20s. Highs in the upper 40s.
Winds generally less than 10 mph.
.THURSDAY...
Colder. Partly cloudy with chance of snow showers. Lows in the
mid 20s. Highs in the lower 30s. Winds generally less than
10 mph.
.FRIDAY...
Mostly clear. Lows around 17. Highs in the lower 40s. Winds
generally less than 10 mph.

$$
Forecaster...Hattings
Requested by...Bill Mayer
Type of request...PRESCRIBED
.TAG 1717720.0/RIW
.EMAIL bill_mayer@nps.gov



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