FNUS73 KFSD 051411 FWSFSD SPOT FORECAST FOR RUSH LAKE EAST...USFWS NATIONAL WEATHER SERVICE SIOUX FALLS SD 911 AM CDT MON APR 5 2010 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...WINDS WILL BE QUITE VARIABLE ACROSS THE BURN AREA AROUND EXPECTED IGNITION TIME AS A WEAK RIDGE OF HIGH PRESSURE SLIDES SLOWLY TO THE EAST. EVENTUALLY...WINDS WILL BEGIN TO FAVOR AN EASTERLY COMPONENT BY AFTERNOON...AND WILL INCREASE SIGNIFICANTLY BY MID TO LATE AFTERNOON. A WEAK DISTURBANCE ALOFT WILL MOVE ACROSS THE AREA LATER THIS AFTERNOON...AND WHILE FAIRLY DRY AIR IS IN PLACE AT LOW LEVELS...THERE WILL BE A CHANCE FOR LIGHT PRECIPITATION BY LATE AFTERNOON. WITH THE DRY AIR AT LOW LEVELS...THERE IS RISK FOR SOME ERRATIC AND GUSTY WINDS NEAR ANY OF THESE SHOWERS DURING THE LATE AFTERNOON. A MUCH BETTER CHANCE FOR RAINFALL IS EXPECTED BY LATE TONIGHT. .TODAY... MAX TEMPERATURE.....60-65. MIN HUMIDITY........36 PERCENT. TIME (CDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY COVER.......MC MC MC MC MC MC MC MC MC MC MC MC % SKY COVER.....65 67 69 71 73 75 78 78 79 80 79 79 WEATHER COV..... CHC CHC CHC WEATHER TYPE.... RW RW RW TEMP............36 39 45 49 53 55 57 59 61 62 62 61 RH..............81 83 65 61 55 48 42 39 37 38 38 41 DEWPOINT........31 34 34 36 37 36 34 34 35 36 36 37 20 FT WIND DIR..WSW WSW WSW SW VRB VRB ENE ENE E ESE ESE E 20 FT WIND SPD..3 5 6 5 3 3 3 5 7 12 14 16 20 FT WIND GUST.5 5 5 15 20 25 SMOKE DISPERSAL.PR PR PR PR PR PR FR FR GD GD EX EX CHC OF PCPN (%).0 0 0 0 0 0 10 10 10 30 40 40 MIX HGT (KFT)...0.3 0.3 0.5 0.9 1.5 2.4 3.0 3.4 3.8 4.2 4.4 4.7 TRANSP WIND DIR.WNW WNW WSW WSW WSW VRB ENE E ESE ESE ESE ESE TRANSP WIND SPD.7 6 5 5 5 3 6 8 11 14 20 23 HAINES INDEX....5 5 5 5 5 5 5 5 5 5 4 3 .TONIGHT... MIN TEMPERATURE.....41-46. MAX HUMIDITY........84 PERCENT. TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM SKY COVER.......MCLDY MCLDY MCLDY MCLDY MCLDY MCLDY % SKY COVER.....78 78 77 76 79 82 WEATHER COV.....CHANCE CHANCE CHANCE LIKELY LIKELY LIKELY WEATHER TYPE....RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR TEMP............60 56 52 49 47 46 RH..............43 53 65 76 81 82 DEWPOINT........38 39 41 42 41 41 20 FT WIND......E 17 ENE 16 ENE 16 NE 17 NE 16 NE 16 20 FT WIND GUST.25 25 25 25 25 25 SMOKE DISPERSAL.EXCEL EXCEL EXCEL GOOD GOOD GOOD CHC OF PCPN (%).40 40 50 60 60 60 $$ FORECASTER...CHAPMAN REQUESTED BY...ERIC EARHART TYPE OF REQUEST...PRESCRIBED .TAG 20100405.RUSHL.01/FSD