FNUS75 KBYZ 212200
FWSBYZ

SPOT FORECAST FOR ROUGH CREEK...NORTHERN CHEYENNE AGENCY BIA
NATIONAL WEATHER SERVICE BILLINGS MT
400 PM MDT FRI SEP 21 2012

FORECAST IS BASED ON IGNITION TIME OF 1605 MDT ON SEPTEMBER 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
NORTHWEST WINDS WILL DIMINISH QUICKLY LATE THIS AFTERNOON INTO
EARLY THIS EVENING. EXPECT GUSTS TO 25 MPH UNTIL ABOUT 5 PM.
NORTHWEST WINDS WILL BECOME LIGHT OVERNIGHT AND TURN SOUTHEASTERLY
AROUND SUNRISE. EXPECT MODERATE RH RECOVERY TONIGHT. SATURDAY WILL
BE A BIT WARMER WITH RH VALUES IN THE MID TO UPPER TEENS. WINDS
WILL BE MUCH LIGHTER OUT OF THE EAST TO SOUTHEAST SATURDAY
AFTERNOON. CHAMBERS

.REST OF TODAY...

SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....73-78.
MIN HUMIDITY........18-22 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTHWEST WINDS 5 TO 15 MPH WITH GUSTS TO 25 MPH
                    UNTIL 5 PM...THEN DIMINISHING TO 5 TO 12 MPH.
 RIDGETOP...........NORTHWEST 15 TO 25 MPH...DIMINISHING TO 10 TO 15 MPH
                    AFTER 5 PM.
MIXING HEIGHT.......4300 FT AGL.
MIXING WINDS........NORTHWEST 15 TO 25 MPH.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MIN TEMPERATURE.....44-49.
MAX HUMIDITY........50-60 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTH WINDS 5 TO 10 MPH IN THE EVENING BECOMING
                    LIGHT OVERNIGHT.
 RIDGETOP...........NORTH 5 TO 15 MPH.
MIXING HEIGHT.......400 FT AGL.
MIXING WINDS........NORTHEAST 5 TO 15 MPH.

.SATURDAY...

SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....75-80.
MIN HUMIDITY........15-20 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTHEAST WINDS 8 TO 16 MPH.
 RIDGETOP...........EAST 10 TO 15 MPH.
MIXING HEIGHT.......4200 FT AGL.
MIXING WINDS........EAST 10 TO 15 MPH.

$$
FORECASTER...CHAMBERS
REQUESTED BY...MERLIN SIOUX
TYPE OF REQUEST...PRESCRIBED
.TAG 20120921.ROUGH.01/BYZ