FNUS73 KDMX 271610 FWSDMX SPOT FORECAST FOR PILE BURN...IOWA DNR FIRE NATIONAL WEATHER SERVICE DES MOINES IA 1110 AM CDT WED JUL 27 2011 FORECAST IS BASED ON IGNITION TIME OF 1130 CDT ON JULY 27. 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. ...HEAT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING... .DISCUSSION... LIGHT SOUTHERLY WINDS OF AROUND 10 MPH ARE EXPECTED THIS AFTERNOON. THUNDERSTORMS ARE POSSIBLE MAINLY THIS EVENING AND TONIGHT. .TODAY... SKY/WEATHER.........PARTLY SUNNY (55-65 PERCENT). ISOLATED SHOWERS AND THUNDERSTORMS IN THE MORNING...THEN SHOWERS AND THUNDERSTORMS LIKELY EARLY IN THE AFTERNOON. SHOWERS AND THUNDERSTORMS LATE IN THE AFTERNOON. TEMPERATURE.........86 AT IGNITION...MAX 92. RH..................72 PERCENT AT IGNITION...MIN 66 PERCENT. EYE LEVEL WINDS.....SOUTHWEST WINDS 7 TO 12 MPH. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......2200 FT AGL INCREASING TO 5000 FT AGL LATE IN THE MORNING...THEN INCREASING TO 5400 FT AGL LATE IN THE AFTERNOON DECREASING TO 2800 FT AGL LATE IN THE AFTERNOON. MIXING WINDS........SOUTH 5 TO 14 MPH SHIFTING TO THE EAST 3 TO 8 MPH IN THE AFTERNOON. SMOKE DISPERSAL.....POOR (22500 KNOT-FT). WIND (20 FT)........WINDS SOUTH AT 10 MPH AT IGNITION...OTHERWISE SOUTHWEST WINDS 7 TO 12 MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS. TIME (CDT) 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........66 59 55 57 63 66 67 69 WEATHER COV.....ISO ISO LKY LKY LKY DEF DEF DEF WEATHER TYPE....RW RW RW RW RW RW RW RW TSTM COV........ISO ISO LKY LKY LKY DEF DEF DEF TEMP............84 86 88 89 90 90 89 88 RH..............72 70 66 66 66 68 70 72 20 FT WIND DIR..S S S S S S SW SW 20 FT WIND SPD..9 10 12 12 12 10 9 7 20 FT WIND GUST.10 15 15 15 15 15 10 EYE LVL WND DIR.S S S S S S SW SW EYE LVL WND SPD.6 7 9 9 9 7 6 5 EYE LVL WND GST.10 15 15 15 15 15 10 MIX HGT (KFT)...2.2 3.2 4.1 4.5 5.0 5.4 4.1 2.8 MIXNG WIND DIR..S S S SE SE E E E MIXNG WIND SPD..12 8 5 3 3 5 6 8 HAINES INDEX....4 4 4 4 3 3 3 4 .TONIGHT... SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT). SHOWERS AND THUNDERSTORMS LIKELY IN THE EVENING...THEN CHANCE OF SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT. TEMPERATURE.........MIN 73. RH..................MAX 90 PERCENT. EYE LEVEL WINDS.....WEST WINDS AROUND 5 MPH EARLY IN THE EVENING BECOMING LIGHT. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......1500 FT AGL. MIXING WINDS........NORTHEAST 6 TO 14 MPH. SMOKE DISPERSAL.....POOR (12300 KNOT-FT). WIND (20 FT)........WEST WINDS AROUND 5 MPH EARLY IN THE EVENING BECOMING LIGHT. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS. TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM SKY (%).........71 69 66 64 64 63 WEATHER COV.....LIKELY LIKELY LIKELY CHANCE CHANCE CHANCE WEATHER TYPE....RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR TSTM COV........LIKELY LIKELY LIKELY CHANCE CHANCE CHANCE TEMP............89 83 80 78 76 75 RH..............70 82 85 85 87 90 20 FT WIND......W 5 SW 1 W 1 NW 2 W 2 NW 2 20 FT WIND GUST. EYE LEVEL WIND..W 4 SW 1 W 1 NW 1 W 1 NW 1 EYE LVL WND GST. MIX HGT (FT)....1500 700 400 700 700 800 MIXNG WIND......NE 9 E 7 NE 7 N 12 NE 14 E 12 HAINES INDEX....4 4 4 3 3 3 $$ FORECASTER...LEE REQUESTED BY...RYAN TYPE OF REQUEST...PRESCRIBED .TAG 20110727.PILEB.01/DMX