FNUS75 KCYS 141038
FWSCYS

SPOT FORECAST FOR IRON MOUNTAIN RX...BLM
NATIONAL WEATHER SERVICE CHEYENNE WY
438 AM MDT WED APR 14 2010

FORECAST IS BASED ON IGNITION TIME OF 0930 MDT ON APRIL 14.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
SOUTH-SOUTHWEST WINDS ARE EXPECTED ON THE EAST ASPECT OF THE BURN SITE
TODAY...WITH SPEEDS OF 8 TO 10 MPH AND GUSTS TO AROUND 13 MPH. WEST
WINDS ARE EXPECTED ON THE WEST ASPECT TODAY. WINDS ON THE WEST ASPECT
WILL INCREASE SLIGHTLY FROM 5 TO 8 MPH WITH GUSTS TO 10 MPH THROUGH
1100 TO 10 TO 14 MPH WITH GUSTS TO 18 MPH THIS AFTERNOON. RELATIVE
HUMIDITIES ARE EXPECTED TO DROP TO THE 20 TO 25 PERCENT RANGE TODAY
...WITH FAIR RECOVERIES EXPECTED TONIGHT. NO PRECIPITATION IS
EXPECTED AT THE BURN SITE THROUGH THURSDAY.

.TODAY...

SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT).
MAX TEMPERATURE.....53 TO 57 DEGREES.
MIN HUMIDITY........20 TO 25 PERCENT.
WIND (20 FT)........
                    EAST ASPECT....SOUTH-SOUTHWEST 8 TO 10 MPH GUSTS TO AROUND 13 MPH.
                    WEST ASPECT....WEST 5 TO 8 MPH GUSTS TO 10 MPH THROUGH 1100.
                                   WEST 10 TO 14 MPH GUSTS TO 18 MPH AFTER 1100.
CWR.................0 PERCENT.
MIXING HEIGHT.......5200 FT AGL INCREASING TO 7200 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST AROUND 20 MPH.
SMOKE DISPERSAL.....EXCELLENT (76500-143100 KNOT-FT).

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT).
MIN TEMPERATURE.....30 TO 35 DEGREES.
MAX HUMIDITY........60 TO 66 PERCENT.
WIND (20 FT)........
                    EAST ASPECT....DOWNSLOPE 4 TO 7 MPH.
                    WEST ASPECT....WEST WINDS 8 TO 12 MPH GUSTS TO 14 MPH...
                                   BECOMING DOWNSLOPE 4-7 MPH AFTER 2100.
CWR.................0 PERCENT.
MIXING HEIGHT.......3800 FT AGL DECREASING TO 200 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....WEST AROUND 10 MPH.
SMOKE DISPERSAL.....BECOMING POOR BY 2400 (1300-55700 KNOT-FT).

.THURSDAY...

SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (35-45 PERCENT).
MAX TEMPERATURE.....AROUND 55 DEGREES.
MIN HUMIDITY........25 TO 30 PERCENT.
WIND (20 FT)........UPSLOPE/UPVALLEY 5-9 MPH.
CWR.................0 PERCENT.
MIXING HEIGHT.......3200 FT AGL INCREASING TO 6300 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....NORTHEAST AROUND 8 MPH.
SMOKE DISPERSAL.....FAIR IN THE MORNING...BECOMING EXCELLENT
                    (18400-61700 KNOT-FT).

$$
FORECASTER...CARPENTER
REQUESTED BY...CHRIS OTTO
TYPE OF REQUEST...PRESCRIBED
.TAG 20100414.IRONM.01/CYS