FNUS73 KFSD 211651 FWSFSD SPOT FORECAST FOR ANN 25 PB...MN DNR NATIONAL WEATHER SERVICE SIOUX FALLS SD 1151 AM CDT TUE APR 21 2009 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...SOME MID LEVEL CLOUDINESS WILL BE FOUND IN YOUR AREA THIS AFTERNOON...PRIMARILY DUE TO A FRONT ALOFT MOVING SLOWLY EASTWARD ACROSS THIS AREA. WIND WISE...WINDS WILL BE STEADY STATE FROM THE NORTHWEST OR NORTH TO NORTHWEST WITH NO WIND SHIFTS. HOWEVER DUE TO STRONG MIXING THIS AFTERNOON...SPEEDS WILL BE BRISK...IN THE BREEZY CATEGORY FROM 15 TO 25 MPH. IT APPEARS NOW THAT GUSTS TO 30 MPH OR GREATER WILL BE TOUGH TO COME BY...BUT 25 MPH GUSTS ARE CERTAINLY A STRONG POSSIBILITY. IT LOOKS LIKE WE ARE STILL ON TARGET FOR MINIMUM RH VALUES TO FALL JUST BELOW 30 PERCENT IN THE LATE AFTERNOON. ON WEDNESDAY...WINDS WILL BE LIGHT...AND MORE VARIABLE IN DIRECTION AS A SURFACE RIDGE OF HIGH PRESSURE MOVES RIGHT ACROSS THIS AREA...CAUSING A WIND SHIFT IN THE MIDDAY HOURS. BY MID AFTERNOON...THE SURFACE WINDS SHOULD FINALLY SETTLE ON A SOUTH TO SOUTHEAST DIRECTION AT 5 TO 10 MPH. .TODAY... MAX TEMPERATURE.....58-63. MIN HUMIDITY........26 PERCENT. TIME (CDT) 12P 1PM 2PM 3PM 4PM 5PM SKY.............PC PC PC PC PC PC TEMP (F)........49 51 53 56 58 61 RH (%)..........44 41 38 34 32 28 DEWPOINT (F)....28 28 28 28 28 28 20 FT WIND DIR..NNW NNW NNW NNW NNW NNW 20 FT WIND SPD..18 18 18 18 17 16 20 FT WIND GUST.26 26 26 26 25 23 DISPERSAL INDEX.EX EX EX EX EX EX CHC OF PCPN (%).10 10 10 10 10 10 MIX HGT (KFT)...5.2 6.9 7.4 7.9 8.3 7.8 TRANSP WIND DIR.NNW NNW NNW NNW NNW NW TRANSP WIND SPD.28 28 26 25 23 23 HAINES INDEX....4 4 4 5 5 5 .TONIGHT... MAX HUMIDITY........82 PERCENT. TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM RH (%)..........29 36 49 59 70 76 20 FT WIND......NW 15 NW 12 WNW 7 NW 7 NW 7 WNW 6 20 FT WIND GUST.20 15 CHC OF PCPN (%).10 10 10 10 10 10 .WEDNESDAY... MAX TEMPERATURE.....67-72. MIN HUMIDITY........27 PERCENT. TIME (CDT) 6 AM 9 AM NOON 3 PM SKY.............PCLDY PCLDY MCLEAR MCLEAR WEATHER TYPE....NONE NONE NONE NONE TEMP (F)........36 45 59 67 RH (%)..........82 58 36 29 20 FT WIND......WNW 6 N 5 N 3G5 SSE 3G8 DISPERSAL INDEX.POOR POOR GOOD GOOD CHC OF PCPN (%).10 10 10 10 MIX HGT (FT)....300 1200 4500 6300 TRANSPORT WIND..WNW 7 NNW 7 NW 9 W 8 HAINES INDEX....4 4 4 4 $$ FORECASTER...MJF REQUESTED BY...BRAD BOLDUAN TYPE OF REQUEST...PRESCRIBED .TAG 20090421.ANN25.01/FSD