Suppression Forecast
Issued by NWS Riverton, WY

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000
FNUS75 KRIW 232144
FWSRIW

SPOT FORECAST FOR COTTONWOOD II RX...IA TDC
NATIONAL WEATHER SERVICE RIVERTON WY
344 PM MDT THU APR 23 2015

FORECAST IS BASED ON IGNITION TIME OF 1000 MDT ON APRIL 24.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

AN INCLEMENT AND COOL PATTERN WILL CONTINUE THROUGH THE WEEKEND.
ONE SYSTEM WITH RAIN AND SNOW SHOWERS WILL IMPACT THE FIRE AREA THIS
EVENING...WITH DRY CONDITIONS THEN FROM MIDNIGHT TO ABOUT
NOON...BEFORE ANOTHER SYSTEM BRINGS ANOTHER ROUND OF RAIN AND SNOW
SHOWERS FRIDAY AFTERNOON AND EVENING. AN ISOLATED THUNDERSTORM
CANNOT BE RULED OUT THIS EVENING OR FRIDAY AFTERNOON AND EVENING.
A DRIER AND WARMER CONDITIONS ARE EXPECTED MONDAY AND TUESDAY.

...THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS...
...HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT...

FORECASTER...MURRELL

.TONIGHT...
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT) WITH SCATTERED
                    RAIN AND SNOW SHOWERS THROUGH MIDNIGHT. AN
                    ISOLATED THUNDERSTORM POSSIBLE THROUGH 9 PM.
                    PARTLY CLOUDY (30-40 PERCENT) AFTER MIDNIGHT.
MIN TEMPERATURE.....28.
MAX HUMIDITY........95-100 PERCENT.
20 FOOT WINDS.......VARIABLE 5-10 MPH WITH GUSTS TO AROUND 25
                    MPH IN THE EVENING...BECOMING DOWNSLOPE/DOWNVALLEY
                    4-8 MPH BETWEEN 10 PM AND MIDNIGHT. GUSTY AND
                    ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS IN
                    THE EVENING.
RIDGE TOP WINDS.....WEST 10-15 MPH...BECOMING SOUTHWEST AROUND 10
                    MPH BY MIDNIGHT. GUSTY AND ERRATIC FROM SHOWERS
                    AND THUNDERSTORMS.
LAL.................2 UNTIL 9 PM...THEN 1.
CHC OF WETTING RAIN.10 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......DECREASING TO 1500 FT AGL.
TRANSPORT WINDS.....WEST 10-15 MPH...BECOMING SOUTHWEST AROUND 10
                    MPH BY MIDNIGHT.
SMOKE DISPERSAL.....POOR.

.FRIDAY...
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT) IN THE MORNING.
                    MOSTLY CLOUDY (75-85 PERCENT) WITH SCATTERED
                    RAIN AND SNOW SHOWERS WITH ISOLATED
                    THUNDERSTORMS IN THE AFTERNOON.
MAX TEMPERATURE.....52.
MIN HUMIDITY........40 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 4-8 MPH BY 10 AM...THEN
                    BECOMING WEST AROUND 10 MPH AROUND 2 PM.
                    GUSTS TO AROUND 20 MPH IN THE AFTERNOON.
                    HOWEVER...GUSTIER AND ERRATIC WINDS NEAR
                    ANY THUNDERSTORMS.
RIDGE TOP WINDS.....SOUTHWEST AROUND 10 MPH...BECOMING WEST
                    SOUTHWEST 10-15 MPH IN THE AFTERNOON.
LAL.................1 UNTIL 1200...THEN 2.
CHC OF WETTING RAIN.10 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......4000-5000 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 10-15 MPH...BECOMING WEST
                    SOUTHWEST 15-20 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....FAIR TO GOOD (55500-81000 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...

.FRIDAY NIGHT...MOSTLY CLOUDY. RAIN AND SNOW SHOWERS LIKELY AND
ISOLATED THUNDERSTORMS IN THE EVENING...THEN CHANCE OF SNOW
SHOWERS AFTER MIDNIGHT. LOWS IN THE MID 20S. WEST WINDS AROUND
12 MPH.

.SATURDAY...MOSTLY CLOUDY WITH NUMEROUS SNOW SHOWERS WITH
POSSIBLE SHOWERS AND THUNDERSTORMS. HIGHS IN THE UPPER 40S.
WINDS GENERALLY LESS THAN 10 MPH.

.SUNDAY...MOSTLY CLOUDY WITH SNOW SHOWERS LIKELY AND CHANCE OF
SHOWERS. LOWS IN THE MID 20S. HIGHS IN THE MID 40S. WINDS
GENERALLY LESS THAN 10 MPH.

.MONDAY...PARTLY CLOUDY. LOWS IN THE MID 20S. HIGHS IN THE LOWER
50S. WINDS GENERALLY LESS THAN 10 MPH.

.TUESDAY...MOSTLY CLEAR. LOWS IN THE UPPER 20S. HIGHS IN THE
UPPER 50S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...MURRELL
REQUESTED BY...PAUL SWENSON
REASON FOR REQUEST...PRESCRIBED
.TAG 20150424.COTTO.01/RIW





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