FNUS73 KUNR 262134
FWSUNR

SPOT FORECAST FOR MYRTLE...USFS
NATIONAL WEATHER SERVICE RAPID CITY SD
334 PM MDT THU JUL 26 2012

FORECAST IS BASED ON REQUEST TIME OF 1524 MDT ON JULY 26.
IF CONDITIONS BECOME UNREPRESENTATIVE CONTACT THE
NATIONAL WEATHER SERVICE OFFICE IN RAPID CITY.

.DISCUSSION...HIGH PRESSURE WILL MOVE SOUTHEAST ACROSS THE DAKOTAS
TONIGHT. THIS WILL BRING SEASONAL TEMPERATURES AND RELATIVELY DRY
AIR. HOWEVER...A THUNDERSTORM MAY DEVELOP OVER THE BLACK HILLS
LATE THIS AFTERNOON OR EARLY EVENING...AND COULD AFFECT THE FIRE
WITH ERRATIC WINDS. OTHERWISE...THE HIGH WILL MOVE SLOWLY EAST
FRIDAY AS A STORM SYSTEM OVER THE ROCKIES MOVES TOWARD THE BLACK
HILLS. THIS WILL BRING A RETURN OF SOUTHEAST WINDS AND A GRADUAL
INCREASE IN MOISTURE. SOUTH WINDS MAY BE QUITE GUSTY ON FRIDAY.
SCATTERED AFTERNOON THUNDERSTORMS WILL DEVELOP OVER PARTS OF
NORTHEASTERN WYOMING AND FAR WESTERN SOUTH DAKOTA. THE STORMS WILL
SPREAD EASTWARD OVERNIGHT...WITH SOME OF THEM BEING SEVERE. WE
WILL SEE A LULL IN THUNDERSTORM ACTIVITY ON SATURDAY...BUT THE
CHANCE OF THUNDERSTORMS WILL RETURN AGAIN LATE SATURDAY NIGHT AND
SUNDAY. WARMER AIR WILL ALSO SPREAD BACK INTO THE REGION FRIDAY
THROUGH THE WEEKEND. AT LEAST A SLIGHT CHANCE OF THUNDERSTORMS
WILL PERSIST THROUGH MOST OF NEXT WEEK...AND TEMPERATURES WILL BE
ABOVE AVERAGE.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS AND
                    THUNDERSTORMS EARLY IN THE EVENING.
TEMPERATURE.........MIN 56.
RH..................MAX 74 PERCENT.
WIND (20 FT)........NORTHEAST WINDS 5 TO 9 MPH BECOMING LIGHT.
CWR.................0 PERCENT.
LAL.................2 UNTIL 1900...THEN 1.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......200 TO 700 FT AGL.
TRANSPORT WINDS.....NORTHWEST AROUND 10 MPH SHIFTING TO THE EAST 2
                    TO 9 MPH EARLY IN THE EVENING.
SMOKE DISPERSAL.....FAIR DECREASING TO POOR EARLY IN THE EVENING.

.FRIDAY...

SKY/WEATHER.........MOSTLY SUNNY THEN BECOMING MOSTLY CLOUDY.
                    CHANCE OF THUNDERSTORMS AND RAIN SHOWERS IN THE
                    AFTERNOON.
TEMPERATURE.........MAX 86.
RH..................MIN 31 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTHEAST 5 TO 13 MPH
                    EARLY IN THE MORNING...THEN INCREASING TO 9 TO
                    16 MPH IN THE AFTERNOON.
CWR.................0 PERCENT INCREASING TO 25 PERCENT IN THE
                    AFTERNOON.
LAL.................1 UNTIL 1200...THEN 3.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......6200 TO 7200 FT AGL.
TRANSPORT WINDS.....SOUTH 2 TO 10 MPH INCREASING TO 10 TO 15 MPH IN
                    THE LATE MORNING AND AFTERNOON.
SMOKE DISPERSAL.....FAIR INCREASING TO GOOD IN THE AFTERNOON.

$$
FORECASTER...MB
REQUESTED BY...REBECCA BULLS
TYPE OF REQUEST...WILDFIRE
.TAG 20120726.MYRTL.01/UNR