FNUS73 KUNR 242348
FWSUNR

SPOT FORECAST FOR FORTIFICATION...CAMPBELL COUNTY FIRE
NATIONAL WEATHER SERVICE RAPID CITY SD
548 PM MDT FRI AUG 24 2012

FORECAST IS BASED ON REQUEST TIME OF 1735 MDT ON AUGUST 24.
IF CONDITIONS BECOME UNREPRESENTATIVE CONTACT THE
NATIONAL WEATHER SERVICE OFFICE IN RAPID CITY.

...RED FLAG WARNING IN EFFECT UNTIL MIDNIGHT MDT TONIGHT...

.DISCUSSION...
A COLD FRONT HAS PASSED THROUGH THE AREA AND WINDS WILL CONTINUE
FROM THE NORTHWEST AT 10 TO 20 MPH WITH GUSTS TO AROUND 25 MPH
THIS EVENING. WINDS WILL THEN BECOME LIGHT AND VARIABLE AROUND
MIDNIGHT. ANY THUNDERSTORM ACTIVITY WILL REMAIN WELL SOUTHEAST OF
THE BURN AREA. THE COMBINATION OF DRY FUELS...LOW RELATIVE
HUMIDITY...AND GUSTY WINDS WILL MAINTAIN EXTREME FIRE WEATHER
CONDITIONS THROUGH MUCH OF THE EVENING.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR.
TEMPERATURE.........89 AT REQUEST...MIN 50.
RH..................14 PERCENT AT REQUEST...MAX 46 PERCENT.
WIND (20 FT)........WINDS NORTHWEST 10 TO 20 MPH WITH GUSTS TO 25
                    MPH...BECOMING LIGHT AND VARIABLE AROUND
                    MIDNIGHT.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH EARLY THIS EVENING...DECREASING TO
                    2 BY MIDNIGHT.
MIXING HEIGHT.......10000 FT AGL EARLY THIS EVENING...DECREASING TO
                    1000 TO 1500 FT AGL AROUND 900 PM MDT.
TRANSPORT WINDS.....NORTHWEST 15 TO 25 MPH.
SMOKE DISPERSAL.....EXCELLENT DECREASING TO POOR IN THE LATE EVENING
                    AND OVERNIGHT.

.SATURDAY...

SKY/WEATHER.........SUNNY.
TEMPERATURE.........MAX 82.
RH..................MIN 14 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTHEAST 5 TO 9 MPH IN
                    THE LATE MORNING.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......6800 TO 7800 FT AGL.
TRANSPORT WINDS.....NORTHWEST 5 TO 6 MPH SHIFTING TO THE SOUTH 6 TO
                    9 MPH IN THE LATE MORNING.
SMOKE DISPERSAL.....FAIR.

$$
FORECASTER...MB
REQUESTED BY...J R  FOX
TYPE OF REQUEST...WILDFIRE
.TAG 20120824.FORTI.01/UNR