FNUS73 KUNR 181320
FWSUNR

SPOT FORECAST FOR FOSSIL RX...US FOREST SERVICE
NATIONAL WEATHER SERVICE RAPID CITY SD
720 AM MDT MON OCT 18 2010

FORECAST IS BASED ON IGNITION TIME OF 1000 MDT ON OCTOBER 18.
IF CONDITIONS BECOME UNREPRESENTATIVE CONTACT THE
NATIONAL WEATHER SERVICE OFFICE IN RAPID CITY.

.DISCUSSION...HIGH PRESSURE WILL BRING SUNNY SKIES AND MILD
TEMPERATURES TO THE REGION FOR THE NEXT SEVERAL DAYS. HIGHS
TODAY WILL BE NEAR 60 WITH MINIMUM RELATIVE HUMIDITIES AROUND
25 PERCENT. WINDS WILL BE LIGHT AND VARIABLE. MIXING HEIGHTS
WILL INCREASE TO NEAR 4500 FT AGL BY THIS AFTERNOON. TONIGHT
WILL BE CLEAR AND COOL WITH FAIR RELATIVE HUMIDITY RECOVERY.

TUESDAY WILL SEE SLIGHTLY WARMER TEMPERATURES WITH NORTHWEST
WINDS INCREASING TO 10 TO 15 MPH IN THE AFTERNOON. MINIMUM
RELATIVE HUMIDITIES WILL AGAIN BE NEAR 25 PERCENT WITH MIXING
HEIGHTS INCREASING TO AROUND 5000 FT AGL.

.TODAY...

SKY/WEATHER.........MOSTLY SUNNY.
TEMPERATURE.........41 AT IGNITION...MAX 59.
RH..................50 PERCENT AT IGNITION...MIN 27 PERCENT.
WIND (20 FT)........WINDS SOUTH AT 6 MPH AT IGNITION...OTHERWISE
                    LIGHT WINDS BECOMING SOUTHEAST 5 TO 6 MPH EARLY
                    IN THE MORNING.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......4200 TO 5200 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 5 TO 12 MPH.
SMOKE DISPERSAL.....POOR INCREASING TO FAIR LATE IN THE AFTERNOON.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR.
TEMPERATURE.........MIN 31.
RH..................MAX 85 PERCENT.
WIND (20 FT)........SOUTHEAST WINDS AROUND 5 MPH EARLY IN THE
                    EVENING BECOMING LIGHT...THEN BECOMING WEST 5
                    TO 7 MPH AFTER MIDNIGHT.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......100 TO 600 FT AGL.
TRANSPORT WINDS.....WEST 7 TO 10 MPH.
SMOKE DISPERSAL.....POOR.

.TUESDAY...

SKY/WEATHER.........SUNNY.
TEMPERATURE.........MAX 63.
RH..................MIN 23 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 8 TO 13 MPH.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......4700 TO 5700 FT AGL.
TRANSPORT WINDS.....NORTHWEST 12 TO 18 MPH INCREASING TO 18 TO 25
                    MPH LATE IN THE MORNING...THEN DECREASING TO
                    AROUND 14 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR INCREASING TO GOOD LATE IN THE
                    MORNING...THEN INCREASING TO VERY GOOD EARLY IN
                    THE AFTERNOON DECREASING TO GOOD LATE IN THE
                    AFTERNOON.

$$
FORECASTER...LC
REQUESTED BY...JAY MILLER
TYPE OF REQUEST...PRESCRIBED
.TAG 20101018.FOSSI.01/UNR