FNUS75 KRIW 200934
FWSRIW

SPOT FORECAST FOR CHALL CREEK...USFS BTF
NATIONAL WEATHER SERVICE RIVERTON WY
334 AM MDT THU SEP 20 2012

FORECAST IS BASED ON REQUEST TIME OF 2123 MDT ON SEPTEMBER 19.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

EXPECT LITTLE CHANGE IN THE WEATHER THROUGH THE END OF THE WEEK
WITH WARM DAYS...COOL NIGHTS AND DRY CONDITIONS...WITH VERY SIMILAR
TEMPERATURES AND HUMIDITY EACH DAY. WINDS WILL CONTINUE TO BE
GENERALLY FROM THE NORTHWEST TODAY...BUT WILL BE LIGHTER AND
MAINLY TERRAIN DRIVEN ON FRIDAY. A WEAK STORM SYSTEM MIGHT BRING
SOME RAIN SHOWER ACTIVITY MONDAY AND/OR TUESDAY.

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

FORECASTER...MURRELL

.TODAY...
SKY/WEATHER.........SUNNY (10 PERCENT).
MAX TEMPERATURE.....70.
MIN HUMIDITY........15 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 3-6 MPH BY 9 AM...THEN BECOMING
                    NORTHWEST 5-10 MPH BY NOON. GUSTS TO 15 MPH
                    IN THE AFTERNOON.
RIDGE TOP WINDS.....NORTHWEST 5-10 MPH INCREASING TO AROUND 15 MPH
                    IN THE AFTERNOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......6700 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....NORTHWEST 10-15 MPH INCREASING TO 15-20 MPH
                    IN THE AFTERNOON.
SMOKE DISPERSAL.....GOOD BY AFTERNOON.

.TONIGHT...
SKY/WEATHER.........CLEAR (0-10 PERCENT).
MIN TEMPERATURE.....35-40.
MAX HUMIDITY........50-55 PERCENT.
20 FOOT WINDS.......NORTHWEST WINDS 5-10 MPH BECOMING
                    DOWNSLOPE/DOWNVALLEY 4-7 MPH BY 9 PM.
RIDGE TOP WINDS.....NORTHWEST 10-15 MPH DECREASING TO 5-10
                    MPH BY MIDNIGHT.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......800 FT AGL BY MID EVENING.
TRANSPORT WINDS.....NORTHWEST 10-15 MPH DECREASING TO 5-10 MPH
                    BY MIDNIGHT.
SMOKE DISPERSAL.....POOR BY 8 PM.

.FRIDAY...
SKY/WEATHER.........SUNNY (10 PERCENT).
MAX TEMPERATURE.....70.
MIN HUMIDITY........15 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY OR EASTERLY 3-7 MPH.
RIDGE TOP WINDS.....NORTHWEST 5-10 MPH...BECOMING LIGHT WEST TO
                    NORTHWEST IN THE AFTERNOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......7500 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....WEST TO NORTHWEST 5 TO 10 MPH.
SMOKE DISPERSAL.....FAIR IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...

.FRIDAY NIGHT...CLEAR. LOWS IN THE MID 40S. WINDS GENERALLY LESS
THAN 10 MPH.

.SATURDAY...CLEAR. HIGHS IN THE UPPER 60S. WINDS GENERALLY LESS
THAN 10 MPH.

.SUNDAY...MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE UPPER
60S. WINDS GENERALLY LESS THAN 10 MPH.

.MONDAY...PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE MID 60S. WINDS
GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...MURRELL
REQUESTED BY...ROD DYKEHOUSE
REASON FOR REQUEST...WILDFIRE
.TAG 20120919.CHALL.01/RIW