FNUS75 KRIW 171640
FWSRIW

SPOT FORECAST FOR CHALL CREEK FIRE...SUBLETTE COUNTY EMERGENCY MANAGEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
1040 AM MDT MON SEP 17 2012

FORECAST IS BASED ON REQUEST TIME OF 1015 MDT ON SEPTEMBER 17.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
HIGH PRESSURE BUILDS INTO WESTERN WYOMING OVER THE NEXT FEW DAYS.
BREEZY NORTH TO NORTHWEST WINDS WILL OCCUR THIS AFTERNOON AND EARLY
EVENING...BEFORE SUBSIDING LATER THIS EVENING. OTHERWISE...THE RESULT
OF THIS HIGH PRESSURE WILL BE LIGHT WINDS AND VERY COOL NIGHTS.
OTHER THAN AREAS OF SMOKE WITH POOR SMOKE DISPERSAL...THE SKY WILL
BE GENERALLY CLEAR THE NEXT FEW DAYS.


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

FORECASTER...LYNOTT

.TODAY...
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT). AREAS OF SMOKE.
MAX TEMPERATURE.....58-62.
MIN HUMIDITY........18-21 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING NORTHWEST
                    AROUND 17 MPH WITH HIGHER GUSTS LATE IN THE
                    AFTERNOON.
RIDGE TOP WINDS.....NORTH 10 TO 15 MPH IN THE LATE MORNING AND EARLY
                    AFTERNOON...THEN SHIFTING TO THE NORTHWEST
                    AROUND 25 MPH BY MID AFTERNOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2500-3500 FT AGL INCREASING TO 5800-6800 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST AROUND 10 MPH SHIFTING TO THE NORTH
                    13 TO 18 MPH IN THE LATE MORNING AND EARLY
                    AFTERNOON...THEN SHIFTING TO THE NORTHWEST
                    AROUND 25 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (39100 KNOT-FT) INCREASING TO VERY GOOD
                    (111500 KNOT-FT) BY MID AFTERNOON.

.TONIGHT...
SKY/WEATHER.........CLEAR (0-10 PERCENT). AREAS OF SMOKE.
MIN TEMPERATURE.....40-44.
MAX HUMIDITY........58-61 PERCENT.
20 FOOT WINDS.......NORTHWEST WINDS 10 TO 15 MPH AND GUSTY UNTIL
                    EARLY MORNING BECOMING DOWNSLOPE/DOWNVALLEY 4-7
                    MPH.
RIDGE TOP WINDS.....NORTHWEST 15 TO 20 MPH EARLY.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......4300-5300 FT AGL DECREASING TO 1000-1800 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....NORTHWEST 17 TO 24 MPH.
SMOKE DISPERSAL.....GOOD THIS EVENING (94700 KNOT-FT) DECREASING TO
                    POOR (23500 KNOT-FT) AFTER MIDNIGHT.

.TUESDAY...
SKY/WEATHER.........SUNNY (0-10 PERCENT). AREAS OF SMOKE.
MAX TEMPERATURE.....63-67.
MIN HUMIDITY........16-20 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING NORTHWEST
                    AROUND 12 MPH WITH HIGHER GUSTS LATE IN THE
                    AFTERNOON.
RIDGE TOP WINDS.....NORTHWEST 10 TO 20 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2000-3000 FT AGL INCREASING TO 4800-5800 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....NORTHWEST 16 TO 22 MPH.
SMOKE DISPERSAL.....POOR (38100 KNOT-FT) INCREASING TO GOOD (93500
                    KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.TUESDAY NIGHT...CLEAR. AREAS OF SMOKE. LOWS IN THE MID 40S.
WINDS GENERALLY LESS THAN 10 MPH.
.WEDNESDAY...CLEAR. AREAS OF SMOKE. LOWS IN THE UPPER 40S. HIGHS
IN THE MID 60S. WINDS GENERALLY LESS THAN 10 MPH.
.THURSDAY...CLEAR. LOWS IN THE MID 40S. HIGHS IN THE UPPER 60S.
WINDS GENERALLY LESS THAN 10 MPH.
.FRIDAY...CLEAR. LOWS IN THE MID 40S. HIGHS IN THE UPPER 60S.
WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...LYNOTT
REQUESTED BY...JIM MITCHELL
REASON FOR REQUEST...WILDFIRE
.TAG 20120917.CHALL.01/RIW