Suppression Forecast
Issued by NWS Cheyenne, WY

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FNUS75 KCYS 201110
FWSCYS

Spot Forecast for North Fork Slash Pile...Centennial Valley VFD
National Weather Service Cheyenne WY
510 AM MDT Sun May 20 2018

Forecast is based on ignition time of 0600 MDT on May 20.
If conditions become unrepresentative...contact the National Weather
Service.

Please contact our office at (307) 772-2227, if you have questions
or concerns with this forecast.

.DISCUSSION...
Generally a mostly cloudy day ahead, although could see some
breaks in the clouds occurring between 0900 and 1500. As winds
turn easterly this afternoon, showers and thunderstorms will
become likely as moisture air mass moves upslope/upvalley.
Although warmer than yesterday, temperatures will stay relatively
cool today only topping out in the mid 50s. Shower and
thunderstorm activity will dissipate by 2100 this evening giving
way to decreasing clouds overnight. Temperatures will be warmer
for Monday reaching the mid 60s and the burn site. Although
coverage will be MUCH less compared to today, can`t rule out a
weak shower or thunderstorms after 1500 on Monday.

.TODAY...

Sky/weather.........Mostly cloudy until 0900, then becoming partly
                    cloudy until 1500...then once again becoming
                    mostly cloudy. Scattered showers and
                    thunderstorms likely after 1400.
CWR.................Zero percent until 1400...then 20 percent.
LAL.................3.
Max temperature.....Around 55.
Min humidity........40 to 45 percent.
WIND (20 FT)........Light and variable until 1300...then becoming
                    east and upslope/upvalley at around 10 mph.
                    Gusty and erratic winds expected near
                    thunderstorms after 1400.
Mixing height.......1900 ft AGL increasing to 9500 ft AGL in the
                    afternoon.
Transport winds.....Southeast at around 10 mph.
Smoke dispersal.....Poor to excellent (10400-75400 knot-ft).
Haines Index........4 or low potential for large plume dominated
                    fire growth.

.TONIGHT...

Sky/weather.........Mostly cloudy until 2400...then becoming
                    mostly clear. Chance of rain showers and
                    slight chance of thunderstorms until 2100.
CWR.................10 percent until 2100...then zero percent.
LAL.................2.
Min temperature.....Around 40.
Max humidity........82 to 87 percent.
WIND (20 FT)........East at 8 to 12 mph until 2400...then becoming
                    southwest and downslope/downvalley at 5 to 10
                    mph. Gusty and erratic winds expected near
                    thunderstorms in the early evening.
Mixing height.......1300-2300 ft AGL.
Transport winds.....Southwest 10-15 mph.
Smoke dispersal.....Fair becoming poor (12700-23600 knot-ft).
Haines Index........3 or very low potential for large plume
                    dominated fire growth.

.MONDAY...

Sky/weather.........Mostly sunny then becoming mostly cloudy.
                    Slight chance of showers and thunderstorms
                    after 1500.
CWR.................5 percent.
LAL.................3.
Max temperature.....Around 65.
Min humidity........27 percent.
WIND (20 FT)........Drainage wind in the morning becoming upslope/
                    upvalley at around 1000. Southwest winds of
                    10 to 15 mph developing after 1200. Gusty and
                    erratic winds expected near thunderstorms.
Mixing height.......6300 ft AGL increasing to 13600 ft AGL in the
                    afternoon.
Transport winds.....Southwest around 10 mph.
Smoke dispersal.....Excellent (66000-135600 knot-ft).
Haines Index........5 or moderate potential for large plume
                    dominated fire growth.

$$
Forecaster...Hahn
Requested by...Eric Gregory
Type of request...PRESCRIBED
.TAG 1810282.0/CYS
.EMAIL ericcpc@yahoo.com


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