Suppression Forecast
Issued by NWS Riverton, WY

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FNUS75 KRIW 210942
FWSRIW

Spot Forecast for Hams Fork Rx...USFS
National Weather Service Riverton WY
342 AM MDT Wed Jun 21 2017

Forecast is based on ignition time of 0800 MDT on June 21.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...Surface low pressure deepening over south central
Wyoming will result in another round of gusty west wind this
afternoon. Overall, temperatures and wind will trend very similar
to Tuesday with slightly higher RH. Isolated afternoon
thunderstorms are expected to remain south and west of the area,
but some high-based showers or virga may cause some erratic wind
gusts in the late afternoon/early evening. A dry and cooler
northwest flow will prevail over the area Thursday with gusty west
northwest wind in the afternoon.

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

FORECASTER...Meunier

.TODAY...

Sky/weather.........Mostly sunny (10-20 percent) then becoming
                    partly cloudy (30-40 percent) after 2 pm.
Max temperature.....75-78.
Min humidity........26-29 percent.
20-foot winds.......Upslope/upvalley or south 5-9 mph in the morning,
                    becoming west 10 to 15 mph with gusts to
                    around 30 mph in the afternoon.
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........4 or low potential for large plume dominated
                    fire growth.
Mixing height.......4000 ft AGL until 0900, then 10500 ft AGL in the
                    afternoon.
Transport winds.....West around 15 mph increasing to 25 mph in the
                    afternoon.
Smoke dispersal.....Good increasing to excellent in the afternoon.

.TONIGHT...

Sky/weather.........Mostly clear (20-30 percent).
Min temperature.....46-49.
Max humidity........60-63 percent.
20-foot winds.......Northwest winds 10 to 15 mph with gusts to
                    around 30 mph early in the evening becoming
                    downslope/downvalley 4-7 mph.
Ridge top winds.....West northwest 20 to 25 mph, decreasing to 15 to 20 mph
                    in the late evening and overnight.
LAL.................No Tstms.
Chc of wetting rain.Zero percent.
Haines Index........5 or moderate potential for large plume
                    dominated fire growth.
Mixing height.......5800 ft AGL until 9 pm, then lowering to near
                    1000 FT AGL overnight.
Transport winds.....West 15 to 20 mph.
Smoke dispersal.....Excellent decreasing to poor after midnight.

.THURSDAY...

Sky/weather.........Mostly sunny (10-20 percent).
Max temperature.....66-69.
Min humidity........17-20 percent.
20-foot winds.......Upslope/upvalley 5-9 mph becoming west northwest 10 to 15 mph
                    mph with gusts to around 35 mph in the late
                    morning and afternoon.
Ridge top winds.....West around 10 to 15 mph in the morning,
                    increasing to around 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.......3300 ft AGL until 0900, then 5900 ft AGL in the
                    afternoon.
Transport winds.....West around 15 mph increasing to west 20 to 28
                    mph in the late morning and afternoon.
Smoke dispersal.....Good increasing to excellent in the afternoon.

.FORECAST DAYS 3 THROUGH 5...
.THURSDAY NIGHT...
Clear. Lows around 40. Winds generally less than 10 mph.

.FRIDAY...
Clear. Lows around 40. Highs in the mid 60s. West winds around
10 mph.

.SATURDAY...
Clear. Lows in the lower 40s. Highs in the mid 60s. Winds
generally less than 10 mph.

.SUNDAY...
Clear. Lows in the lower 40s. Highs in the mid 60s. Winds
generally less than 10 mph.

$$
Forecaster...Meunier
Requested by...Cody McFarland
Type of request...PRESCRIBED
.TAG 1711344.0/RIW
.EMAIL Cmcfarland@fs.fed.us


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