Suppression Forecast
Issued by NWS Riverton, WY

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855
FNUS75 KRIW 202203
FWSRIW

Spot Forecast for June Fire...USFS SHF
National Weather Service Riverton WY
403 PM MDT Thu Jul 20 2017

Forecast is based on request time of 0600 MDT on July 21.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...The combination of monsoonal moisture and a passing
cold front will continue to bring a few more scattered showers to
the area through this evening, but the majority of the thunderstorm
activity has already exited to the south and east. However, we still
can not rule out the possibility of an additional isolated thunderstorm
through early this evening. Dry weather will return for
Friday and Saturday.

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

FORECASTER...Lipson

.FRIDAY...

Sky/weather.........Mostly sunny (10-20 percent).
Max temperature.....76-79.
Min humidity........16-19 percent.
20-foot winds.......Upslope/upvalley 5-9 mph becoming north 8 to 10 mph
                    around 0800, then west, occasionally variable, at 10
                    to 20 mph after 1200. Some gusts to around 25 mph after
                    1200.
Ridge top winds.....West 10 to 15 mph increasing to 20 to 25 mph in
                    the afternoon.
LAL.................No Tstms.
Chc of wetting rain.Zero percent.
Haines Index........5 or moderate potential for large plume
                    dominated fire growth.
Mixing height.......1700 ft AGL until 1200, then 10000 ft AGL.
Transport winds.....West 16 to 23 mph.
Smoke dispersal.....Fair increasing to excellent in the afternoon.

.FRIDAY NIGHT...

Sky/weather.........Clear (0-10 percent).
Min temperature.....51-54.
Max humidity........43-46 percent.
20-foot winds.......West winds around 10 mph with gusts to around
                    15 mph early in the evening becoming
                    downslope/downvalley 4-7 mph.
Ridge top winds.....Southwest 10 to 15 mph.
LAL.................No Tstms.
Chc of wetting rain.Zero percent.
Haines Index........5 or moderate potential for large plume
                    dominated fire growth.
Mixing height.......8900 ft AGL until 2400, then 800 ft AGL.
Transport winds.....West 9 to 17 mph decreasing to around 7 mph
                    early in the morning.
Smoke dispersal.....Excellent decreasing to poor after midnight.

.SATURDAY...

Sky/weather.........Sunny (5-15 percent).
Max temperature.....76-79.
Min humidity........15-18 percent.
20-foot winds.......Upslope/upvalley 5-9 mph.
Ridge top winds.....West around 10 mph shifting to the south late
                    in the morning, then shifting to the west in
                    the afternoon.
LAL.................No Tstms.
Chc of wetting rain.Zero percent.
Haines Index........3 or very low potential for large plume
                    dominated fire growth.
Mixing height.......2300 ft AGL until 1200, then 9200 ft AGL.
Transport winds.....West 5 to 9 mph.
Smoke dispersal.....Fair to good.

.FORECAST DAYS 3 THROUGH 5...
.SATURDAY NIGHT...
Mostly clear. Lows in the lower 50s. Winds generally less than
10 mph.
.SUNDAY...
Mostly clear. Lows in the lower 50s. Highs in the lower 80s.
Winds generally less than 10 mph.
.MONDAY...
Partly cloudy. Slight chance of showers and thunderstorms. Lows
in the mid 50s. Highs around 80. Winds generally less than
10 mph.
.TUESDAY...
Mostly cloudy. Chance of showers and thunderstorms. Lows in the
mid 50s. Highs in the upper 70s. Winds generally less than
10 mph.

$$
Forecaster...Lipson
Requested by...Sid Hall
Type of request...WILDFIRE
.TAG 1713074.0/RIW
.EMAIL shall@fs.fed.us



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