Suppression Forecast
Issued by NWS Riverton, WY

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000
FNUS75 KRIW 202015
FWSRIW

Spot Forecast for West Slope RX...BLM WOD
National Weather Service Riverton WY
215 PM MDT Fri Apr 20 2018

Forecast is based on ignition time of 1000 MDT on April 21.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...

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

FORECASTER...Lipson

.SATURDAY...

Sky/weather.........Mostly sunny (10-20 percent).
Max temperature.....57-60.
Min humidity........32-35 Percent.
20-foot winds.......Northeast downslope 3 to 5 mph until 0900.
                    Then south upvalley 4-7 mph. isolated gusts up to 10 mph
                    late in the afternoon after 1600.
Ridge top winds.....Southwest around 10 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.......6000 ft AGL.
Transport winds.....Southwest 9 to 12 mph.
Smoke dispersal.....Fair to good.

.SATURDAY NIGHT...

Sky/weather.........Partly cloudy (30-40 percent).
Min temperature.....Around 40.
Max humidity........67-70 percent.
20-foot winds.......Northeast downslope 4-7 mph.
Ridge top winds.....West around 10 mph shifting to the north after
                    midnight.
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 FT AGL until 2400, then 700 ft AGL.
Transport winds.....West around 10 mph shifting to the south late
                    in the evening, then shifting to the north
                    around 14 mph after midnight shifting to the
                    northeast early in the morning.
Smoke dispersal.....Poor.

.SUNDAY...

Sky/weather.........Partly cloudy (30-40 percent) with high and mid clouds. then becoming
                    mostly sunny (25-35 percent).
Max temperature.....55 to 58.
Min humidity........33-36 percent.
20-foot winds.......Southerly upvalley 5-9 mph.
Ridge top winds.....North around 10 mph shifting to the west late
                    in the morning, then shifting to the southwest
                    in the afternoon.
LAL.................No Tstms.
Chc of wetting rain.Zero percent.
Haines Index........2 or very low potential for large plume
                    dominated fire growth.
Mixing height.......6000 ft AGL until 1200, then 6000 ft AGL.
Transport winds.....Northeast around 10 mph shifting to the south
                    10 to 13 mph in the late morning and afternoon.
Smoke dispersal.....Fair to good.

.FORECAST DAYS 3 THROUGH 5...
.SUNDAY NIGHT...
Partly cloudy. Slight chance of showers after midnight. Lows in
the upper 30s. Winds generally less than 10 mph.
.MONDAY...
Colder. Cloudy with showers likely and chance of snow showers.
Lows in the upper 30s. Highs in the mid 40s. Winds generally less
than 10 mph.
.TUESDAY...
Mostly clear. Lows in the upper 20s. Highs in the upper 40s.
Winds generally less than 10 mph.
.WEDNESDAY...
Partly cloudy with slight chance of showers. Lows in the lower
30s. Highs in the mid 50s. Winds generally less than 10 mph.

$$
Forecaster...Lipson
Requested by...Fred Tucker
Type of request...PRESCRIBED
.TAG 1806652.1/RIW
.EMAIL ftucker@blm.gov,tjhaas@blm.gov


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