FNUS75 KRIW 161408
FWSRIW

SPOT FORECAST FOR DITCH CREEK...USFS BTF
NATIONAL WEATHER SERVICE RIVERTON WY
808 AM MDT WED SEP 16 2009

FORECAST IS BASED ON REQUEST TIME OF 2038 MDT ON SEPTEMBER 15.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
STRONG HIGH PRESSURE WILL REBUILD OVER WESTERN WYOMING TODAY.
ENOUGH RESIDUAL MOISTURE IN THE LOW LEVELS OF THE ATMOSPHERE
EXISTS FOR ISOLATED THUNDERSTORMS LATE THIS AFTERNOON AND EARLY
EVENING. MID AND UPPER LEVEL DRY AIR MOVING INTO THE AREA THIS
AFTERNOON WILL MAKE IT HARD FOR ANY THUNDERSTORM TO BE LONG LIVED
AND PRODUCE MUCH IN THE WAY OF WETTING RAIN. THE STRONG HIGH PRESSURE AND
MID AND UPPER LEVEL DRY AIR WILL DOMINATE THE WEATHER OVER WESTERN
WYOMING THURSDAY AND FRIDAY.

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

FORECASTER...CHURCH

.TODAY...
SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT). ISOLATED SHOWERS
                    AND THUNDERSTORMS IN THE AFTERNOON.
MAX TEMPERATURE.....67-70.
MIN HUMIDITY........27-31 PERCENT.
20 FOOT WINDS.......EAST-SOUTHEAST 3 TO 6 MPH. GUSTY AND ERRATIC
WINDS EXPECTED NEAR THUNDERSTORMS IN THE AFTERNOON.
RIDGE TOP WINDS.....SOUTHEAST 6 TO 12 MPH.
LAL.................1 UNTIL 1200...THEN 2.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......4300 FT AGL INCREASING TO 8100 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHEAST 10 TO 15 MPH.
SMOKE DISPERSAL.....POOR (34400 KNOT-FT) INCREASING TO GOOD (96600 KNOT-
                    FT) IN THE AFTERNOON.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT).
MIN TEMPERATURE.....44-47.
MAX HUMIDITY........49-54 PERCENT.
20 FOOT WINDS.......EAST-SOUTHEAST 2 TO 5 MPH.
RIDGE TOP WINDS.....SOUTHEAST 5 TO 10 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......4300 FT AGL DECREASING TO 600 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....SOUTHEAST 10 TO 15 MPH.
SMOKE DISPERSAL.....POOR (3100-25200 KNOT-FT).

.THURSDAY...
SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (25-35 PERCENT).
MAX TEMPERATURE.....70-73.
MIN HUMIDITY........21-26 PERCENT.
20 FOOT WINDS.......UPSLOPE (WEST) 3-7 MPH.
RIDGE TOP WINDS.....SOUTH 2 TO 5 MPH IN THE MORNING...THEN WEST
                    5 TO 9 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.......4900 FT AGL INCREASING TO 9300 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....SOUTH 4 TO 8 MPH IN THE MORNING...THEN WEST
                    5 TO 12 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR TO GOOD (25600-60500 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.THURSDAY NIGHT...PARTLY CLOUDY. LOWS IN THE MID 40S. WINDS
GENERALLY LESS THAN 10 MPH.
.FRIDAY...PARTLY CLOUDY. LOWS IN THE MID 40S. HIGHS IN THE UPPER
60S. WINDS GENERALLY LESS THAN 10 MPH.
.SATURDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
ISOLATED THUNDERSTORMS. LOWS IN THE MID 40S. HIGHS IN THE UPPER
60S. WEST WIND 10 TO 20 MPH.
.SUNDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
ISOLATED THUNDERSTORMS. LOWS IN THE UPPER 30S. HIGHS IN THE MID
60S. WEST WIND 15 TO 25 MPH.

$$

FORECASTER...CHURCH
REQUESTED BY...ABBENDROTH
REASON FOR REQUEST...WILDFIRE
.TAG 20090915.DITCH.01/RIW