FNUS75 KCYS 242233
FWSCYS

SPOT FORECAST FOR DEEP CREEK RX...BLM
NATIONAL WEATHER SERVICE CHEYENNE WY
433 PM MDT THU SEP 24 2009

FORECAST IS BASED ON IGNITION TIME OF 1200 MDT ON SEPTEMBER 25.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...AN UPPER LOW PRESSURE SYSTEM WILL REMAIN OVER THE
REGION TONIGHT THROUGH LATE MORNING ON FRIDAY. THIS SYSTEM WILL
BRING COOL OVERNIGHT TEMPERATURES TONIGHT WITH EXCELLENT HUMIDITY
RECOVERIES OVER THE BURN SITE. NO PRECIPITATION IS EXPECTED AT THE
BURN SITE WITH THIS SYSTEM. BREEZY NORTH WINDS WILL DIMINISH
THROUGH THE EVENING...AND WILL INCREASE AGAIN DURING THE AFTERNOON
ON FRIDAY. THE UPPER LOW WILL BEGIN TO MOVE EAST FRIDAY AFTERNOON
WHICH WILL ALLOW TEMPERATURES TO INCREASE AND DRIER AIR WILL BEGIN
TO FILTER INTO THE REGION. EXPECT RHS AT THE BURN SITE TO DECREASE
TO THE LOWER 20 PERCENTS IN THE LATE AFTERNOON. FRIDAY NIGHT WILL
NOT BE AS COOL ALTHOUGH HUMIDITY RECOVERIES WILL CONTINUE TO BE
GOOD. SATURDAY WILL BE EVEN WARMER AND DRIER WITH STRONGER WINDS
AS A WEAK WEATHER SYSTEM PASSES OVERHEAD. COULD SEE WINDS GUSTING
20 TO 30 MPH OVER THE BURN SITE BY SATURDAY AFTERNOON WITH RH
VALUES IN THE UPPER TEENS. SUNDAY WILL BE SIMILAR...WITH A DRY COLD
FRONT MOVING ACROSS THE SITE LATER IN THE EVENING. GUSTY WEST
WINDS AHEAD OF THE FRONT WILL SWITCH TO THE NORTH...AND SLIGHTLY
COOLER AIR WILL FILTER IN FOR MONDAY.

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT).
MIN TEMPERATURE.....AROUND 35 TO 38.
MAX HUMIDITY........65 TO 70 PERCENT.
WIND (20 FT)........NORTH WINDS 10 TO 12 MPH EARLY IN THE EVENING
                    BECOMING DOWNSLOPE/DOWNVALLEY 4-7 MPH. GUSTS UP
                    TO 18 MPH IN THE EARLY EVENING.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3200 FT AGL DECREASING TO 200 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....NORTH 12 TO 15 MPH.
SMOKE DISPERSAL.....POOR TO GOOD (1000-35500 KNOT-FT).

.FRIDAY...

SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT).
MAX TEMPERATURE.....62 TO 65.
MIN HUMIDITY........20 TO 23 PERCENT.
WIND (20 FT)........NORTH WINDS 12 TO 15 MPH WITH GUSTS TO 23 MPH
                    IN THE AFTERNOON.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......500 FT AGL INCREASING TO 6700 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....NORTH 18 TO 22 MPH.
SMOKE DISPERSAL.....FAIR TO EXCELLENT (13800-80300 KNOT-FT).

.FRIDAY NIGHT...

SKY/WEATHER.........CLEAR (5-15 PERCENT).
MIN TEMPERATURE.....AROUND 40.
MAX HUMIDITY........48 TO 52 PERCENT.
WIND (20 FT)........NORTH WINDS AROUND 10 MPH EARLY IN THE EVENING
                    BECOMING DOWNSLOPE/DOWNVALLEY 4-7 MPH.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......3400 FT AGL DECREASING TO 200 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....NORTH 10 TO 14 MPH.
SMOKE DISPERSAL.....POOR TO GOOD (800-37000 KNOT-FT).

.SATURDAY...MOSTLY SUNNY WITH MAX TEMPERATURE 65 TO 68. 20 FOOT
            WINDS OUT OF THE WEST 17 TO 20 MPH WITH GUSTS UP
            TO 30 MPH IN THE AFTERNOON...EASING OVERNIGHT.
            MIN HUMIDITY 17 TO 19 PERCENT. MAX HUMIDITY 45 TO
            50 PERCENT OVERNIGHT.

.SUNDAY...PARTLY CLOUDY WITH MAX TEMPERATURE 67 TO 71. 20 FOOT
          WINDS OUT OF THE WEST 15 TO 18 MPH WITH GUSTS UP
          TO 30 MPH IN THE AFTERNOON...BECOMING NORTH 8 TO 12 MPH
          IN THE LATE EVENING AND FURTHER DECREASING AFTER MIDNIGHT.
          MIN HUMIDITY 15 TO 18 PERCENT. MAX HUMIDITY 48 TO 52
          PERCENT OVERNIGHT.

.MONDAY...PARTLY CLOUDY WITH MAX TEMPERATURE 63 TO 65. 20 FOOT
          WINDS OUT OF THE SOUTHWEST 7 TO 13 MPH. MIN HUMIDITY 19
          TO 21 PERCENT. MAX HUMIDITY 55 TO 60 PERCENT OVERNIGHT.

$$
FORECASTER...MAZUR
REQUESTED BY...MEIR
TYPE OF REQUEST...PRESCRIBED
.TAG 20090925.DEEPC.01/CYS