FNUS73 KFSD 221314 FWSFSD SPOT FORECAST FOR EVANS WMA...IOWA DNR NATIONAL WEATHER SERVICE SIOUX FALLS SD 814 AM CDT WED APR 22 2009 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...MAIN FEATURE TODAY IS A SURFACE RIDGE OF HIGH PRESSURE WHICH IS CURRENTLY LOCATED JUST EAST OF I 29. THIS RIDGE OF HIGH PRESSURE WILL NUDGE SLOWLY EASTWARD TODAY ACROSS SOUTHWEST MINNESOTA AND NORTHWEST IOWA. SO THE LIGHT WEST TO NORTHWEST WINDS EARLY THIS MORNING WILL GO MORE DUE NORTH BY LATE MORNING. THEN IN THE EARLY AFTERNOON...THE WINDS WILL BECOME LIGHT AND VARIABLE AS THEY SHIFT FROM THE NORTH TO AN EASTERLY DIRECTION. FINALLY BY 3 PM...THEY WILL SETTLE ON A SOUTHEAST DIRECTION LESS THAN 10 MPH. SO LOOK FOR VARIABLE WIND DIRECTION RIGHT IN THE MIDDLE OF THE DAY. OTHERWISE... AFTERNOON TEMPERATURES IN THE 60S WILL BE COMMON WITH MINIMUM RH VALUES DROPPING TO NEAR 25 PERCENT. THE OUTLOOK FOR THURSDAY IS QUITE POOR. WINDS WILL FAVOR SOUTH TO SOUTHWEST AND WILL BE STRONG AT 25 TO 35 MPH BY LATE MORNING. MAYBE EVEN SOME GUSTS APPROACHING 40 MPH IN THE AFTERNOON. IT IS ANTICIPATED THAT THE RH VALUES ON THURSDAY WILL STAY A BIT TOO HIGH FOR RED FLAG CONDITIONS... BUT AN EXTREME FIRE DANGER IS LIKELY IN THE OFFING NONETHELESS. DUE TO THE LIGHT WINDS...SMOKE DISPERSION CONDITIONS WILL ONLY BE FAIR BY AROUND NOON TODAY. .TODAY... MAX TEMPERATURE.....66-71. MIN HUMIDITY........26 PERCENT. TIME (CDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM SKY.............PC PC PC PC PC PC PC MCR MCR MCR WEATHER TYPE.... TEMP (F)........41 45 50 54 58 62 64 66 68 67 RH (%)..........72 62 51 43 37 32 30 28 27 28 DEWPOINT (F)....33 33 32 32 32 32 32 32 32 33 20 FT WIND DIR..NW NNW N N N NNE NE ESE SE SSE 20 FT WIND SPD..7 7 7 6 5 3 2 2 2 3 20 FT WIND GUST. 5 5 DISPERSAL INDEX.PR PR PR PR FR FR FR FR FR FR CHC OF PCPN (%).10 10 10 10 10 10 10 10 10 10 MIX HGT (KFT)...0.3 0.3 0.4 1.3 2.2 3.1 3.3 3.6 3.8 2.6 TRANSP WIND DIR.NNW NNE NE NNE N NNW NW WNW W WSW TRANSP WIND SPD.9 12 14 14 12 10 8 7 7 8 HAINES INDEX....5 4 4 4 4 4 4 4 4 4 .TONIGHT... MIN TEMPERATURE.....45-50. MAX HUMIDITY........80 PERCENT. TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM SKY.............MCLEAR MCLEAR MCLEAR MCLEAR PCLDY PCLDY WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP (F)........67 63 58 55 52 51 RH (%)..........28 34 44 53 63 68 DEWPOINT (F)....33 34 36 38 40 41 20 FT WIND......SSE 6 SSE 9 SSE 13 SSE 16 SSE 18 SSE 17 20 FT WIND GUST. 10 15 25 30 25 DISPERSAL INDEX.POOR POOR POOR POOR POOR POOR CHC OF PCPN (%).10 0 0 0 0 0 .THURSDAY... MAX TEMPERATURE.....79-84. MIN HUMIDITY........35 PERCENT. TIME (CDT) 6 AM 9 AM NOON 3 PM SKY.............PCLDY PCLDY MCLEAR MCLEAR WEATHER TYPE....NONE NONE NONE NONE TEMP (F)........49 58 71 79 RH (%)..........77 64 44 37 DEWPOINT (F)....42 46 48 50 20 FT WIND......SSE 16G25 S 20G30 S 28G40 S 28G35 DISPERSAL INDEX.POOR POOR GOOD EXCEL CHC OF PCPN (%).0 0 0 0 MIX HGT (FT)....300 500 1900 4400 TRANSPORT WIND..SSE 18 S 22 SSW 33 SSW 32 HAINES INDEX....5 5 5 5 $$ FORECASTER...MJF REQUESTED BY...TJ HERRICK TYPE OF REQUEST...PRESCRIBED .TAG 20090422.EVANS.01/FSD