FNUS75 KCYS 210923
FWSCYS

SPOT FORECAST FOR DRY GULCH...BLM HDD
NATIONAL WEATHER SERVICE CHEYENNE WY
323 AM MDT TUE SEP 21 2010

FORECAST IS BASED ON REQUEST TIME OF 2157 MDT ON SEPTEMBER 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 7 PM MDT THIS
EVENING...

.DISCUSSION...
WEST TO EAST FLOW ALOFT WILL PREVAIL TODAY WITH WINDS TURNING SOUTH
AS SURFACE LOW PRESSURE DEVELOPS ACROSS UTAH AND WESTERN COLORADO.
NO PRECIPITATION WILL OCCUR TODAY DUE TO DRY LOW AND MID LEVELS OF
THE ATMOSPHERE. TONIGHT WILL BE DRY WITH SURFACE WINDS BECOMING
SOUTHWEST AS SURFACE LOW PRESSURE DEVELOPS ACROSS WESTERN NEBRASKA.
THE ATMOSPHERE WILL MOISTEN AND BECOME MORE SATURATED ON WEDNESDAY
WITH SHOWERS AND THUNDERSTORMS INCREASING IN COVERAGE WEDNESDAY
AFTERNOON.

.TODAY...

SKY/WEATHER.........SUNNY (5-15 PERCENT).
MAX TEMPERATURE.....AROUND 72.
MIN HUMIDITY........16 PERCENT.
WIND (20 FT)........UPSLOPE/UPVALLEY 5-9 MPH BECOMING WEST 10 TO 17
                    MPH WITH HIGHER GUSTS IN THE LATE MORNING AND
                    AFTERNOON.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......1700 FT AGL INCREASING TO 6800 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST AROUND 20 MPH.
SMOKE DISPERSAL.....FAIR TO EXCELLENT (13300-157200 KNOT-FT).

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT).
MIN TEMPERATURE.....AROUND 42.
MAX HUMIDITY........60 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 8 TO 15 MPH. GUSTS UP TO 30 MPH
                    DECREASING TO 20 MPH IN THE LATE EVENING AND
                    OVERNIGHT.
CWR.................10 PERCENT.
LAL.................1.
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......2200 FT AGL DECREASING TO 200 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....SOUTHWEST AROUND 18 MPH.
SMOKE DISPERSAL.....POOR TO GOOD (3100-47200 KNOT-FT).

.WEDNESDAY...

SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT) THEN BECOMING
                    MOSTLY CLOUDY (70-80 PERCENT). SCATTERED
                    SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
MAX TEMPERATURE.....AROUND 71.
MIN HUMIDITY........22 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 10 TO 12 MPH WITH HIGHER GUSTS.
CWR.................10 PERCENT INCREASING TO 30 PERCENT IN THE
                    AFTERNOON.
LAL.................3.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......1700 FT AGL INCREASING TO 7300 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST AROUND 19 MPH.
SMOKE DISPERSAL.....FAIR TO EXCELLENT (26900-131700 KNOT-FT).

$$
FORECASTER...RUBIN
REQUESTED BY...DENNIS STRANGE
TYPE OF REQUEST...WILDFIRE
.TAG 20100920.DRYGU.01/CYS