FNUS75 KCYS 250249
FWSCYS

SPOT FORECAST FOR SANDSTONE...BLM CAD
NATIONAL WEATHER SERVICE CHEYENNE WY
849 PM MDT FRI AUG 24 2012

FORECAST IS BASED ON REQUEST TIME OF 2030 MDT ON AUGUST 24.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
A DRY AIR MASS WILL CONTINUE AT THE FIRE SITE FOR THE REMAINDER OF
TONIGHT AND SATURDAY. WINDS WILL REMAIN LIGHT AND SHOULD TURN
DOWNSLOPE/DOWNVALLEY AFTER MIDNIGHT. HUMIDITIES WILL NOT RECOVER
ALL THAT MUCH FROM THEIR CURRENT READINGS EVEN AS TEMPERATURES
COOL DUE TO DRIER CONDITIONS WORKING IN AT THE SAME TIME. MINIMUM
HUMIDITIES WILL DIP BACK TO BELOW 15 PERCENT ON SATURDAY WITH AS
LITTLE IN THE WAY OF CLOUD COVER PUSHES TEMPERATURES ABOVE 75
DEGREES. FORTUNATELY WEST WINDS WILL NOT BE ALL THAT STRONG WITH
GUSTS OF 15 TO 20 MPH POSSIBLE DURING THE AFTERNOON HOURS.

.REST OF TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT) UNTIL MIDNIGHT...
                    THEN BECOMING CLEAR (ZERO PERCENT).
MIN TEMPERATURE.....45 TO 50.
MAX HUMIDITY........50 TO 60 PERCENT.
WIND (20 FT)........LIGHT AND VARIABLE AT AROUND 5 MPH UNTIL
                    MIDNIGHT...THEN BECOMING DOWNSLOPE/DOWNVALLEY
                    AT AROUND 5 MPH.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......5600 FT AGL DECREASING TO 300 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....NORTH/NORTHWEST AT AROUND 5 MPH.
SMOKE DISPERSAL.....BECOMING POOR (1100-81900 KNOT-FT) AFTER
                    MIDNIGHT.

.SATURDAY...

SKY/WEATHER.........SUNNY (0-10 PERCENT).
MAX TEMPERATURE.....75 TO 80.
MIN HUMIDITY........12 TO 15 PERCENT.
WIND (20 FT)........LIGHT AND VARIABLE AT LESS THAN 5 MPH UNTIL
                    1000...THEN BECOMING WEST AND UPSLOPE/UPVALLEY
                    AT 8 TO 12 MPH WITH GUSTS TO 17 MPH.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......6600 FT AGL INCREASING TO 9500 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....WEST AROUND 10 MPH.
SMOKE DISPERSAL.....FAIR BECOMING EXCELLENT (24700-130000 KNOT-FT).

$$
FORECASTER...HAHN
REQUESTED BY...IC
TYPE OF REQUEST...WILDFIRE
.TAG 20120824.SANDS.01/CYS