FNUS75 KRIW 121519
FWSRIW

SPOT FORECAST FOR CANYON...BLM
NATIONAL WEATHER SERVICE RIVERTON WY
ISSUED BY NATIONAL WEATHER SERVICE CHEYENNE WY
917 AM MDT WED AUG 12 2009

FORECAST IS BASED ON REQUEST TIME OF 0726 MDT ON AUGUST 12.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...VERY WARM AND DRY CONDITIONS OVER THE BURN AREA.
CURRENT OBSERVATIONS AND SATELLITE IMAGERY SHOWING CLEAR SKIES
OVERHEAD. RELATIVE HUMIDITIES CURRENTLY IN THE 30 PERCENT RANGE
BUT WILL DROP INTO THE 10 TO 15 PERCENT LATER TODAY. WEST TO
SOUTHWEST WINDS 10 TO 15 MPH THIS AFTERNOON. LITTLE IF ANY
THUNDERSTORM ACTIVITY IS EXPECTED TODAY.

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

FORECASTER...GRIFFITH

.TODAY...

SKY/WEATHER.........SUNNY (0-10 PERCENT).
MAX TEMPERATURE.....AROUND 83.
MIN HUMIDITY........11 PERCENT.
WIND (20 FT)........UPSLOPE/UPVALLEY 5-9 MPH BECOMING SOUTHWEST
                    AROUND 10 MPH IN THE LATE MORNING AND
                    AFTERNOON.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......8300 FT AGL INCREASING TO 13600 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST AROUND 13 MPH.
SMOKE DISPERSAL.....GOOD TO EXCELLENT (49900-176500 KNOT-FT).

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR (5-15 PERCENT).
MIN TEMPERATURE.....AROUND 61.
MAX HUMIDITY........33 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 9 TO 11 MPH SHIFTING TO THE
                    WEST 8 TO 12 MPH AFTER MIDNIGHT. GUSTS UP TO 20
                    MPH.
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......10600 FT AGL DECREASING TO 600 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....WEST AROUND 14 MPH.
SMOKE DISPERSAL.....POOR TO EXCELLENT (3500-148300 KNOT-FT).

.THURSDAY...

SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT).
MAX TEMPERATURE.....AROUND 81.
MIN HUMIDITY........12 PERCENT.
WIND (20 FT)........UPSLOPE/UPVALLEY 5-9 MPH BECOMING SOUTH 10 TO
                    14 MPH WITH HIGHER GUSTS IN THE AFTERNOON.
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......10900 FT AGL INCREASING TO 13700 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST AROUND 12 MPH.
SMOKE DISPERSAL.....GOOD TO EXCELLENT (54300-232400 KNOT-FT).

$$

FORECASTER...GRIFFITH
REQUESTED BY...VOLIN
TYPE OF REQUEST...WILDFIRE
.TAG 20090812.CANYO.01/RIW