FNUS73 KDMX 211251 FWSDMX SPOT FORECAST FOR MIAMI LAKE...IA DNR NATIONAL WEATHER SERVICE DES MOINES IA 751 AM CDT TUE APR 21 2009 FORECAST IS BASED ON IGNITION TIME OF 1030 CDT ON APRIL 21. 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... A FAIRLY TIGHT PRESSURE GRADIENT WILL PERSIST OVER IOWA YET TODAY. THIS WILL PRODUCE A NORTHWEST WIND AT 15 TO 25 MPH WITH GUSTS TO 35 MPH POSSIBLE AT TIMES. HIGH PRESSURE WILL PUSH INTO CENTRAL IOWA TONIGHT AND WEDNESDAY. WIND SPEEDS WILL DIMINISH LATER THIS EVENING AND REMAIN LIGHT FOR WEDNESDAY. PLEASE REMEMBER TO SUBMIT SPOT FORECAST REQUESTS THE NIGHT BEFORE AN INTENDED BURN. .TODAY... SKY/WEATHER.........MOSTLY SUNNY (45-55 PERCENT). MAX TEMPERATURE.....AROUND 60. MIN HUMIDITY........32 PERCENT. EYE LEVEL WINDS.....NORTHWEST WINDS 12 TO 19 MPH. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......1300 FT AGL INCREASING TO 8900 FT AGL. MIXING WINDS........NORTHWEST 21 TO 25 MPH INCREASING TO 28 TO 37 MPH EARLY IN THE MORNING...THEN DECREASING TO AROUND 25 MPH LATE IN THE AFTERNOON. SMOKE DISPERSAL.....EXCELLENT (63700 KNOT-FT) INCREASING TO EXCELLENT (222700 KNOT-FT). TIME (CDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........51 48 47 47 47 48 49 50 52 WEATHER COV..... WEATHER TYPE.... TEMP............43 46 49 52 54 57 60 59 57 RH..............57 51 48 43 40 35 32 33 35 EYE LVL WND DIR.NW NW NW NW NW NW NW NW NW EYE LVL WND SPD.14 15 15 15 15 14 14 13 10 EYE LVL WND GST.30 35 35 35 35 35 30 30 25 MIX HGT (KFT)...3.4 4.0 4.7 5.3 6.5 7.7 8.9 8.3 7.8 MIXNG WIND DIR..NW NW NW NW NW NW NW NW NW MIXNG WIND SPD..36 37 37 36 33 31 29 28 25 HAINES INDEX....5 5 5 5 5 5 5 5 5 .TONIGHT... SKY/WEATHER.........MOSTLY CLOUDY (45-55 PERCENT) THEN BECOMING PARTLY CLOUDY (45-55 PERCENT) THEN BECOMING MOSTLY CLOUDY (50-60 PERCENT) THEN BECOMING PARTLY CLOUDY (40-50 PERCENT). MIN TEMPERATURE.....AROUND 41. MAX HUMIDITY........70 PERCENT. EYE LEVEL WINDS.....WEST WINDS 6 TO 10 MPH. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......7200 FT AGL DECREASING TO 300 FT AGL. MIXING WINDS........NORTHWEST 17 TO 23 MPH BECOMING SOUTHWEST 5 TO 10 MPH EARLY IN THE EVENING. SMOKE DISPERSAL.....EXCELLENT (143700 KNOT-FT) DECREASING TO POOR (2300 KNOT-FT) IN THE LATE EVENING AND OVERNIGHT. TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM SKY (%).........52 49 53 57 51 42 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............56 51 49 47 45 43 RH..............35 50 54 60 65 70 EYE LEVEL WIND..NW 8 W 6 W 5 SW 5 W 5 W 6 EYE LEVEL WIND..20 15 10 10 MIX HGT (FT)....7200 2600 300 300 300 300 MIXNG WIND......NW 23 W 9 W 5 SW 8 SW 10 SW 10 HAINES INDEX....5 5 5 5 4 4 .WEDNESDAY... SKY/WEATHER.........SUNNY (20-30 PERCENT). MAX TEMPERATURE.....AROUND 69. MIN HUMIDITY........32 PERCENT. EYE LEVEL WINDS.....NORTHWEST WINDS AROUND 6 MPH UNTIL LATE AFTERNOON BECOMING LIGHT. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......2000 FT AGL INCREASING TO 6500 FT AGL. MIXING WINDS........WEST 10 TO 17 MPH SHIFTING TO THE NORTHWEST 13 TO 20 MPH LATE IN THE MORNING...THEN BECOMING WEST 3 TO 10 MPH IN THE AFTERNOON. SMOKE DISPERSAL.....EXCELLENT (71100 KNOT-FT). TIME (CDT) 7 AM 10 AM 1 PM 4 PM SKY (%).........36 34 32 22 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE TEMP............43 55 64 68 RH..............67 47 35 32 EYE LEVEL WIND..W 5G10 N 5 NW 5G10 NW 5 MIX HGT (FT)....300 2000 6500 6500 MIXNG WIND......W 10 NW 20 NW 13 NW 7 HAINES INDEX....4 3 4 4 $$ FORECASTER...BOKSA REQUESTED BY...DAVID KUTZ TYPE OF REQUEST...PRESCRIBED .TAG 20090421.MIAMI.01/DMX