FNUS73 KABR 211455
FWSABR

SPOT FORECAST FOR LA PLANT RX...BIA-CHEYENNE RIVER AGENCY
NATIONAL WEATHER SERVICE ABERDEEN SD
955 AM CDT WED SEP 21 2011

FORECAST IS BASED ON IGNITION TIME OF 1400 MDT ON SEPTEMBER 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
SURFACE HIGH PRESSURE WILL CONTINUE TO BUILD INTO THE DISTRICT
FROM THE NORTH THIS MORNING. CLOUDS WILL CONTINUE TO GRADUALLY
DISSIPATE...AND MODERATE NORTH WINDS WILL SLOWLY SUBSIDE THROUGH
THE AFTERNOON. LIGHT WIND WITH CLEAR SKY WILL ALLOW FOR TEMPERATURES
TO DROP INTO THE MID 30S TONIGHT. HIGH PRESSURE AT THE SURFACE AND
ALOFT WILL BE THE DOMINANT WEATHER FEATURES THROUGH THE WEEKEND.

.TODAY...
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT CLOUD) UNTIL
                    1100...THEN MOSTLY SUNNY (25-35 PERCENT CLOUD).
MAX TEMPERATURE.....59-64.
MIN HUMIDITY........43-48 PERCENT.
WIND (20 FT)........NORTH WINDS 7 TO 12 MPH. GUSTS UP TO 18 MPH
                    UNTIL MID AFTERNOON.
HAINES INDEX........3 OR VERY LOW.
MIXING HEIGHT.......300 FT AGL UNTIL 1000. 4700-5000 FT AGL AFTER
                    1300.
TRANSPORT WINDS.....NORTH 20 TO 30 MPH UNTIL 1300...THEN 12 TO 18
                    MPH.
SMOKE DISPERSAL.....AROUND 6900 UNTIL 1000...THEN 68100-80500.
CWR.................ZERO.

TIME (MDT)      2 PM   4 PM
SKY (%).........26     10
WEATHER COV.....
WEATHER TYPE....NONE   NONE
TEMP............57     59
RH..............52     46
20 FT WIND......N 12   N 7
20 FT WIND GUST.20     13

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT CLOUD). PATCHY
                    FROST AFTER 0400.
MIN TEMPERATURE.....34-38.
MAX HUMIDITY........81-86 PERCENT.
WIND (20 FT)........NORTHEAST WINDS AROUND 10 MPH UNTIL 2200...THEN
                    LIGHT.
HAINES INDEX........4 OR LOW.
MIXING HEIGHT.......4200 FT AGL UNTIL 2200...THEN 300 FT AGL.
TRANSPORT WINDS.....NORTH 14 TO 19 MPH UNTIL 2200...THEN EAST 5 TO
                    12 MPH.
SMOKE DISPERSAL.....57400-57700 UNTIL 2200...THEN 1000-2000.
CWR.................ZERO.

TIME (MDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
SKY (%).........17     16     15     15     15     16
WEATHER COV.....                                   PATCHY
WEATHER TYPE....NONE   NONE   NONE   NONE   NONE   FROST
TEMP............56     49     45     43     42     40
RH..............50     63     71     77     80     83
20 FT WIND......N 9    N 7    NE 5   E 3    E 3    E 3
20 FT WIND GUST.15     10     10     5      5      5

.THURSDAY...
SKY/WEATHER.........SUNNY (10-20 PERCENT CLOUD). PATCHY FROST UNTIL
                    0900.
MAX TEMPERATURE.....64-69.
MIN HUMIDITY........34-39 PERCENT.
WIND (20 FT)........LIGHT WINDS UNTIL 0800...THEN SOUTHEAST 5 TO 7
                    MPH.
HAINES INDEX........4 OR LOW.
MIXING HEIGHT.......300 FT AGL UNTIL 1000. 5300-5400 FT AGL AFTER
                    1300.
TRANSPORT WINDS.....SOUTHEAST 5 TO 10 MPH UNTIL 1300...THEN WEST
                    UNTIL 1600...THEN SOUTH UP TO 4 MPH.
SMOKE DISPERSAL.....1500-8800.
CWR.................ZERO.

TIME (MDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
SKY (%).........16     16     16     15     15     14
WEATHER COV.....PATCHY
WEATHER TYPE....FROST  NONE   NONE   NONE   NONE   NONE
TEMP............39     45     53     60     64     64
RH..............86     70     54     43     38     37
20 FT WIND......E 4    SE 5   SE 5   S 6    S 6    SE 6
20 FT WIND GUST.5             10     10     10     10

$$
FORECASTER...CHURCH
REQUESTED BY...ANTHONY KENNEDY
TYPE OF REQUEST...PRESCRIBED
.TAG 20110921.LAPLA.01/ABR