FNUS73 KUNR 231536
FWSUNR

SPOT FORECAST FOR MARTIN RX...US FOREST SERVICE
NATIONAL WEATHER SERVICE RAPID CITY SD
936 AM MDT SAT OCT 23 2010

FORECAST IS BASED ON IGNITION TIME OF 0935 MDT ON OCTOBER 23.
IF CONDITIONS BECOME UNREPRESENTATIVE CONTACT THE
NATIONAL WEATHER SERVICE OFFICE IN RAPID CITY.

.DISCUSSION...
A SLOW MOVING TROUGH WILL CROSS THE CENTRAL AND NORTHERN PLAINS
TODAY PRODUCING WIDESPREAD SHOWERS AND A FEW THUNDERSTORMS OVER
WESTERN SOUTH DAKOTA.  TEMPERATURES WILL BE 15 TO 20 DEGREES COOLER
THAN FRIDAY AND RELATIVE HUMIDITIES ABOVE 70 PERCENT. SMOKE
DISPERSAL IS EXPECTED TO BE POOR OUTSIDE OF THE PRECIPITATION DUE
TO A NEUTRAL STABILITY PROFILE.  THE MOIST UNSETTLED CONDITIONS
ARE EXPECTED TO CONTINUE THROUGH THIS EVENING AS THE WEATHER SYSTEM
MAKES ITS WAY EASTWARD.  WEAK HIGH PRESSURE WILL MOVE INTO THE
NORTHERN PLAINS SUNDAY RESULTING IN A FEW DEGREES OF WARMING AND
SLIGHTLY BETTER SMOKE DISPERSAL.

.TODAY...

SKY/WEATHER.........CLOUDY. NUMEROUS RAIN SHOWERS AND ISOLATED
                    THUNDERSTORMS.
TEMPERATURE.........47 AT IGNITION...MAX 52.
RH..................100 PERCENT AT IGNITION...MIN 74 PERCENT.
WIND (20 FT)........WINDS NORTHEAST AT 7 MPH AT
                    IGNITION...OTHERWISE LIGHT WINDS BECOMING
                    NORTHEAST 5 TO 9 MPH.
CWR.................64 PERCENT.
LAL.................2.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......1800 TO 2800 FT AGL.
TRANSPORT WINDS.....NORTHEAST 10 TO 15 MPH.
SMOKE DISPERSAL.....POOR.

.TONIGHT...

SKY/WEATHER.........CLOUDY. CHANCE OF RAIN SHOWERS IN THE EVENING.
TEMPERATURE.........MIN 37.
RH..................MAX 100 PERCENT.
WIND (20 FT)........NORTHEAST WINDS 5 TO 9 MPH EARLY IN THE EVENING
                    BECOMING LIGHT.
CWR.................20 PERCENT DECREASING TO 0 PERCENT AFTER
                    MIDNIGHT.
LAL.................1.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......100 TO 600 FT AGL.
TRANSPORT WINDS.....NORTHWEST 8 TO 12 MPH.
SMOKE DISPERSAL.....POOR.

.SUNDAY...

SKY/WEATHER.........PARTLY SUNNY.
TEMPERATURE.........MAX 58.
RH..................MIN 45 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTHWEST 6 TO 14 MPH IN
                    THE LATE MORNING AND AFTERNOON.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......4600 TO 5600 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 9 TO 18 MPH INCREASING TO 21 TO 22
                    MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR INCREASING TO GOOD IN THE AFTERNOON...THEN
                    DECREASING TO POOR LATE IN THE AFTERNOON.

$$
FORECASTER...DC
REQUESTED BY...JAY MILLER
TYPE OF REQUEST...PRESCRIBED
.TAG 20101023.MARTI.01/UNR