Suppression Forecast
Issued by NWS Rapid City, SD

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605
FNUS73 KUNR 192038
FWSUNR

Spot Forecast for Hell Canyon...GPC
National Weather Service Rapid City SD
238 PM MDT Wed Jul 19 2017

Forecast is based on request time of 1500 MDT on July 19.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...Isolated thunderstorms are expected to develop over
the next few hours across southwest South Dakota and may affect
the burn site. Winds will be light and variable this
afternoon...then becoming northeast at 5 to 10 mph early this
evening. Storms will redevelop late Thursday. A few storms may be
strong or severe.

.REST OF TODAY...

Sky/weather.........Partly sunny. Isolated showers and
                    thunderstorms.
Max temperature.....Around 92.
Min humidity........18-24 percent.
Wind (20 ft)........Variable at 5 mph. Gusty and erratic
                    winds expected near thunderstorms.
CWR.................5 percent.
LAL.................2.
Haines Index........6 or high potential for large plume dominated
                    fire growth.
Mixing height.......13900 to 14400 ft agl.
Transport winds.....Northwest around 20 mph.
Smoke dispersal.....Excellent.

.TONIGHT...

Sky/weather.........Mostly cloudy. Slight chance of showers and
                    thunderstorms in the evening, then chance of
                    showers and thunderstorms after midnight.
Min temperature.....Around 66.
Max humidity........60-65 percent.
Wind (20 ft)........Northeast winds 5 to 10 mph. Gusty and erratic
                    winds expected near thunderstorms.
CWR.................15 percent.
LAL.................3.
Haines Index........5 or moderate potential for large plume
                    dominated fire growth.
Mixing height.......300 to 800 ft agl.
Transport winds.....Northeast around 15 mph.
Smoke dispersal.....Poor.

.THURSDAY...

Sky/weather.........Mostly cloudy. Chance of showers and
                    thunderstorms in the afternoon.
Max temperature.....Around 84.
Min humidity........30-35 percent.
Wind (20 ft)........Southeast winds 5 to 15 mph. Gusty and erratic
                    winds expected near thunderstorms in the
                    afternoon.
CWR.................15 percent.
LAL.................3.
Haines Index........3 or very low potential for large plume
                    dominated fire growth.
Mixing height.......5300 to 5800 ft agl.
Transport winds.....Southeast around 20 mph.
Smoke dispersal.....Very good.

$$
Forecaster...Calderon
Requested by...Lisa Ryckman
Type of request...WILDFIRE
.TAG 1713007.0/UNR
.EMAIL lryckman@fs.fed.us



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