FNUS75 KRIW 221026
FWSRIW

SPOT FORECAST FOR DITCH CREEK...USFS BTF
NATIONAL WEATHER SERVICE RIVERTON WY
426 AM MDT TUE SEP 22 2009

FORECAST IS BASED ON REQUEST TIME OF 1858 MDT ON SEPTEMBER 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
UPPER LOW OVER EASTERN COLORADO AND THE WESTERN CENTRAL PLAINS WILL
DRIFT SLOWLY TO THE SOUTH TODAY AND TO THE WEST WEDNESDAY...WHILE A
LARGE UPPER LEVEL HIGH PRESSURE SYSTEM OVER THE PACIFIC NORTHWEST
WILL REMAIN NEARLY STATIONARY. THIS WILL KEEP THE FIRE AREA UNDER THE
INFLUENCE OF COOLER THAN NORMAL NORTHERLY FLOW ALOFT. EXPECT COOLER
THAN NORMAL DAYTIME TEMPERATURES TODAY AND WEDNESDAY WITH LOW AFTERNOON
RELATIVE HUMIDITIES. SURFACE HIGH PRESSURE WILL REMAIN IN PLACE TODAY
THROUGH WEDNESDAY WITH DRY WEATHER AND LIGHT WINDS PREDOMINATING.

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

FORECASTER...C.BAKER

.TODAY...
SKY/WEATHER.........SUNNY (5-15 PERCENT).
MAX TEMPERATURE.....59-63.
MIN HUMIDITY........20-23 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH.
RIDGE TOP WINDS.....NORTH 5 TO 10 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......4200 FT AGL INCREASING TO 6200 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....NORTH 8 TO 13 MPH.
SMOKE DISPERSAL.....BECOMING GOOD BY NOON (39500-72800 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........CLEAR (5-15 PERCENT).
MIN TEMPERATURE.....AROUND 37.
MAX HUMIDITY........60-63 PERCENT.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 4-7 MPH.
RIDGE TOP WINDS.....EAST 10 TO 15 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2400 FT AGL DECREASING TO 400 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....EAST 13 TO 14 MPH.
SMOKE DISPERSAL.....POOR (3900-25700 KNOT-FT).

.WEDNESDAY...
SKY/WEATHER.........SUNNY (5-15 PERCENT).
MAX TEMPERATURE.....AROUND 65.
MIN HUMIDITY........20-23 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH.
RIDGE TOP WINDS.....NORTHEAST AROUND 10 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......4100 FT AGL INCREASING TO 8000 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....NORTHEAST 10 TO 13 MPH.
SMOKE DISPERSAL.....BECOMING GOOD BY 11 AM(76000-86000 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY NIGHT...MOSTLY CLEAR. LOWS IN THE UPPER 30S. WINDS
GENERALLY LESS THAN 10 MPH.
.THURSDAY...MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS IN THE MID
60S. WINDS GENERALLY LESS THAN 10 MPH.
.FRIDAY...MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE MID
60S. WINDS GENERALLY LESS THAN 10 MPH.
.SATURDAY...MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE MID
60S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...C.BAKER
REQUESTED BY...ROJO
REASON FOR REQUEST...WILDFIRE
.TAG 20090921.DITCH.01/RIW