FNUS73 KDMX 291318 FWSDMX SPOT FORECAST FOR BISON PLC...USFWS NATIONAL WEATHER SERVICE DES MOINES IA 818 AM CDT WED APR 29 2009 FORECAST IS BASED ON IGNITION TIME OF 1000 CDT ON APRIL 29. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. PLEASE REMEMBER TO SUBMIT A MID BURN OBSERVATION TO THE NATIONAL WEATHER SERVICE FOR EACH PRESCRIBED BURN. .DISCUSSION... THE COVERAGE OF SCATTERED SHOWERS AND THUNDERSTORMS WILL GRADUALLY INCREASE FROM WEST TO EAST ACROSS IOWA TODAY AND TONIGHT. EXPECT A SOUTHEAST WIND BECOMING MORE SOUTHERLY THIS AFTERNOON AND INCREASING. SMOKE DISPERSION WILL BE FAVORABLE WITH A BRISK SE MIXING WIND. .TODAY... SKY/WEATHER.........CLOUDY (90-100 PERCENT). SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. MAX TEMPERATURE.....AROUND 67. MIN HUMIDITY........67 PERCENT. EYE LEVEL WINDS.....SOUTH WINDS 6 TO 13 MPH. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......2500 FT AGL. MIXING WINDS........SOUTHEAST 16 TO 20 MPH. SMOKE DISPERSAL.....GOOD (43000 KNOT-FT). TIME (CDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........100 100 100 100 97 91 88 90 94 WEATHER COV..... SCH SCH SCH SCH SCH SCH WEATHER TYPE.... RW RW RW RW RW RW TEMP............55 57 60 63 64 64 65 66 65 RH..............83 80 75 70 67 70 68 68 70 EYE LVL WND DIR.SE SE SE SE SE S S S S EYE LVL WND SPD.7 8 9 10 10 10 10 10 10 EYE LVL WND GST.15 15 20 20 20 25 25 20 20 MIX HGT (KFT)...1.2 1.6 2.0 2.4 2.4 2.5 2.5 1.8 1.0 MIXNG WIND DIR..SE SE SE SE SE SE SE SE SE MIXNG WIND SPD..18 18 18 18 18 20 20 18 17 HAINES INDEX....2 2 2 2 2 2 2 2 3 .TONIGHT... SKY/WEATHER.........CLOUDY (90-100 PERCENT). SHOWERS AND THUNDERSTORMS IN THE EVENING...THEN SHOWERS AND THUNDERSTORMS LIKELY AFTER MIDNIGHT. MIN TEMPERATURE.....AROUND 58. MAX HUMIDITY........87 PERCENT. EYE LEVEL WINDS.....NORTHEAST WINDS 7 TO 11 MPH. HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......1000 FT AGL. MIXING WINDS........SOUTHEAST 8 TO 16 MPH DECREASING TO AROUND 6 MPH EARLY IN THE MORNING. SMOKE DISPERSAL.....FAIR (13500 KNOT-FT). TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM SKY (%).........96 96 95 95 94 92 WEATHER COV.....DEFNTE DEFNTE DEFNTE LIKELY LIKELY LIKELY WEATHER TYPE....RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR TEMP............66 63 62 61 60 59 RH..............70 78 81 84 84 87 EYE LEVEL WIND..S 9 SE 8 SE 8 E 8 E 7 NE 6 EYE LEVEL WIND..20 15 15 15 15 10 MIX HGT (FT)....300 300 500 1000 900 900 MIXNG WIND......SE 16 SE 15 SE 16 SE 16 SE 13 SE 8 HAINES INDEX....3 3 3 3 3 3 .THURSDAY... SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT). CHANCE OF SHOWERS AND THUNDERSTORMS. MAX TEMPERATURE.....AROUND 67. MIN HUMIDITY........61 PERCENT. EYE LEVEL WINDS.....NORTHWEST WINDS 6 TO 10 MPH. HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......2500 FT AGL. MIXING WINDS........SOUTHEAST 3 TO 5 MPH SHIFTING TO THE WEST 3 TO 12 MPH EARLY IN THE MORNING...THEN SHIFTING TO THE NORTHWEST 13 TO 16 MPH IN THE AFTERNOON. SMOKE DISPERSAL.....GOOD (33100 KNOT-FT). TIME (CDT) 7 AM 10 AM 1 PM 4 PM SKY (%).........91 80 68 73 WEATHER COV.....CHANCE CHANCE CHANCE CHANCE WEATHER TYPE....RNSHWR RNSHWR RNSHWR RNSHWR TEMP............59 63 65 66 RH..............87 75 70 63 EYE LEVEL WIND..NE 5G10 NW 5G10 W 8G15 NW 7G15 MIX HGT (FT)....800 1600 2500 2500 MIXNG WIND......SE 5 SW 5 W 12 NW 15 HAINES INDEX....3 3 3 3 $$ FORECASTER...KINNEY REQUESTED BY...JAMES KRIZMAN TYPE OF REQUEST...PRESCRIBED .TAG 20090429.BISON.01/DMX