FNUS73 KFSD 230140
FWSFSD

SPOT FORECAST FOR SIEH WMA...IOWA DNR
NATIONAL WEATHER SERVICE SIOUX FALLS SD
840 PM CDT WED APR 22 2009

IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
EXTREME GRASSLAND FIRE DANGER ACROSS THE AREA THURSDAY. STRONG PRESSURE
GRADIENT AND A WELL MIXED ATMOSPHERE WILL PRODUCE SOUTH TO SOUTH WEST
WINDS OF 20 TO 25 MPH WITH GUSTS TO AROUND 35 MPH. STRONGEST WINDS WILL
BE IN THE AFTERNOON. FORECAST RELATIVE HUMIDITY VALUES ARE A BEST CASE
SCENARIO FOR THURSDAY AFTERNOON...VERY WELL COULD SEE RELATIVE HUMIDITY
DROP TO AROUND 20 PERCENT.

.TODAY...

MAX TEMPERATURE.....70-75.
MIN HUMIDITY........22 PERCENT.

TIME (CDT)      8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY.............MCR MCR MCR MCR MCR MCR MCR MCR PC  PC
WEATHER TYPE....
TEMP (F)........66  61  56  54  54  55  54  53  53  52
RH (%)..........30  37  45  52  54  55  59  64  66  69
DEWPOINT (F)....34  35  35  37  38  39  40  41  42  42
20 FT WIND DIR..E   SE  SE  SE  SSE SSE SSE S   S   S
20 FT WIND SPD..9   12  13  14  15  15  16  16  16  15
20 FT WIND GUST.10  13  15  17  17  20  22  23  23  23
DISPERSAL INDEX.GD  FR  PR  PR  PR  PR  PR  PR  PR  PR

.TONIGHT...

MIN TEMPERATURE.....47-52.
MAX HUMIDITY........74 PERCENT.

TIME (CDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
SKY.............PCLDY  PCLDY  PCLDY  MCLEAR MCLEAR MCLEAR
WEATHER TYPE....NONE   NONE   NONE   NONE   NONE   NONE
TEMP (F)........51     54     65     74     80     82
RH (%)..........74     69     50     40     35     34
DEWPOINT (F)....43     44     46     48     50     51
20 FT WIND......S 14   S 16   SSW 22 S 25   SSW 25 SSW 25
20 FT WIND GUST.19     21     27     32     35     35
DISPERSAL INDEX.POOR   POOR   GOOD   EXCEL  EXCEL  EXCEL


$$
FORECASTER...LIEBL
REQUESTED BY...STEVEN WOODRUFF
TYPE OF REQUEST...PRESCRIBED
.TAG 20090423.SIEHW.01/FSD