FNUS75 KCYS 150940
FWSCYS

SPOT FORECAST FOR IRON MOUNTAIN RX...BLM
NATIONAL WEATHER SERVICE CHEYENNE WY
340 AM MDT THU APR 15 2010

FORECAST IS BASED ON IGNITION TIME OF 0900 MDT ON APRIL 15.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...DRY CONDITIONS WILL OCCUR TODAY AND TONIGHT WITH
SCATTERED AFTERNOON SHOWERS AND THUNDERSTORM ON FRIDAY. WEST FLOW
ALOFT WILL PREVAIL TODAY WITH SURFACE HIGH PRESSURE TO THE NORTH
PRODUCING EAST WINDS THIS AFTERNOON IN THE WAKE OF A COLD FRONT.
WINDS WILL GRADUALLY TURN SOUTHEAST TONIGHT AS SURFACE HIGH PRESSURE
MOVES SOUTHEAST INTO NORTH DAKOTA. LOW LEVEL UPSLOPE SOUTHEAST WINDS
WILL INCREASE ON FRIDAY AS THE GRADIENT BETWEEN HIGH PRESSURE
ACROSS THE NORTHERN PLAINS INTERACTS WITH SURFACE LOW PRESSURE
ACROSS THE GREAT BASIN STATES. CHANCES FOR AFTERNOON SHOWERS
AND THUNDERSTORMS WILL INCREASE ON FRIDAY WITH INCREASED
LOW AND MID LEVEL MOISTURE.

.TODAY...

SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (35-45 PERCENT).
MAX TEMPERATURE.....AROUND 54.
MIN HUMIDITY........30 PERCENT.
WIND (20 FT)........UPSLOPE/UPVALLEY 5-9 MPH BECOMING EAST AROUND
                    10 MPH LATE IN THE AFTERNOON.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3700 FT AGL INCREASING TO 7200 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....NORTH AROUND 10 MPH.
SMOKE DISPERSAL.....FAIR TO EXCELLENT (29700-78900 KNOT-FT).

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT).
MIN TEMPERATURE.....AROUND 33.
MAX HUMIDITY........82 PERCENT.
WIND (20 FT)........SOUTHEAST WINDS 8 TO 10 MPH.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......4100 FT AGL DECREASING TO 300 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....EAST AROUND 11 MPH.
SMOKE DISPERSAL.....POOR TO GOOD (2100-44700 KNOT-FT).

.FRIDAY...

SKY/WEATHER.........PARTLY CLOUDY (55-65 PERCENT) THEN BECOMING
                    MOSTLY CLOUDY (60-70 PERCENT). SCATTERED
                    SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
MAX TEMPERATURE.....AROUND 53.
MIN HUMIDITY........54 PERCENT.
WIND (20 FT)........SOUTHEAST WINDS 10 TO 19 MPH. GUSTS UP TO 30
                    MPH INCREASING TO 35 MPH IN THE AFTERNOON.
CWR.................10 PERCENT INCREASING TO 40 PERCENT IN THE
                    AFTERNOON.
LAL.................3.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......1100-2600 FT AGL.
TRANSPORT WINDS.....SOUTHEAST AROUND 17 MPH.
SMOKE DISPERSAL.....POOR TO GOOD (9700-47200 KNOT-FT).

$$
FORECASTER...RUBIN
REQUESTED BY...CHRIS OTTO
TYPE OF REQUEST...PRESCRIBED
.TAG 20100415.IRONM.01/CYS