Suppression Forecast
Issued by NWS Riverton, WY

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FNUS75 KRIW 192104
FWSRIW

Spot Forecast for Hays Trail...BLM WOD
National Weather Service Riverton WY
304 PM MDT Thu Apr 19 2018

Forecast is based on ignition time of 0800 MDT on April 20.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...

Mostly cloudy to overcast skies will continue for much of the day
Friday. No precipitation is expected. Winds will be northeast
through the day. Clouds will begin to clear from the northwest
late in the afternoon and clear through the overnight hours. Winds
will stay light overnight Friday and gradually switch to the
southwest by midday Saturday. Skies will stay partly cloudy with
dry conditions.

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

FORECASTER...LaVoie

.FRIDAY...

Sky/weather.........Mostly cloudy (60-70 percent) then becoming
                    partly cloudy (45-55 percent) by mid to late
                    afternoon.
Max temperature.....54-57.
Min humidity........49-52 percent.
20-foot winds.......Northeast winds 10 to 15 mph with gusts up
                    to 20 mph, increasing to 25 mph late in the
                    afternoon.
Ridge top winds.....East-Northeast 15 to 25 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.......1300 ft AGL until 1200, then 3800 ft AGL.
Transport winds.....Northeast 15 to 20 mph.
Smoke dispersal.....Fair to good.

.FRIDAY NIGHT...

Sky/weather.........Partly cloudy (40-50 percent) becoming mostly
                    clear (20-30 percent) after midnight.
Min temperature.....35-38.
Max humidity........75-78 percent.
20-foot winds.......East-Northeast winds 8 to 10 mph.
Ridge top winds.....Northeast 10 to 15 mph shifting to the
                    east early in the morning.
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.
Transport winds.....Northeast 10 to 17 mph shifting to the
                    North-Northwest 5 to 10 mph early in the
                    morning.
Smoke dispersal.....Poor.

.SATURDAY...

Sky/weather.........Mostly sunny (15-25 percent) becoming partly
                    cloudy (20-30 percent) by late afternoon.
Max temperature.....59-62.
Min humidity........32-35 percent.
20-foot winds.......East 5-10 mph early in the morning, shifting
                    Southwest by 1200.
Ridge top winds.....North 5-10 mph early in the morning, shifting
                    West-Southwest 10 to 15 mph by 1200.
LAL.................No Tstms.
Chc of wetting rain.Zero percent.
Haines Index........3 or very low potential for large plume
                    dominated fire growth.
Mixing height.......2200-3200 ft AGL.
Transport winds.....Northeast around 10 mph shifting to the west 10 to
                    15 mph in the late morning and afternoon.
Smoke dispersal.....Poor to good.

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

$$
Forecaster...LaVoie
Requested by...307-272-0155
Type of request...PRESCRIBED
.TAG 1807100.0/RIW
.EMAIL ftucker@blm.gov,tjhaas@blm.gov



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