FNUS73 KDMX 211235 FWSDMX SPOT FORECAST FOR NORTH MIDDLE PART DEUX...USFWS NATIONAL WEATHER SERVICE DES MOINES IA 735 AM CDT TUE APR 21 2009 FORECAST IS BASED ON IGNITION TIME OF 0740 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 62. MIN HUMIDITY........30 PERCENT. EYE LEVEL WINDS.....NORTHWEST WINDS 12 TO 19 MPH. HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......1300 FT AGL INCREASING TO 9900 FT AGL. MIXING WINDS........NORTHWEST 20 TO 25 MPH INCREASING TO 30 TO 37 MPH EARLY IN THE MORNING...THEN DECREASING TO 23 TO 26 MPH LATE IN THE AFTERNOON. SMOKE DISPERSAL.....EXCELLENT (64400 KNOT-FT) INCREASING TO EXCELLENT (227500 KNOT-FT). TIME (CDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........46 46 47 48 49 50 50 51 51 52 53 53 WEATHER COV..... WEATHER TYPE.... TEMP............35 38 41 44 47 50 53 56 59 62 61 59 RH..............78 70 62 55 49 44 39 35 33 30 31 33 EYE LVL WND DIR.NW NW NW NW NW NW NW NW NW NW NW NW EYE LVL WND SPD.10 12 14 14 15 15 15 15 14 14 13 10 EYE LVL WND GST.20 25 30 35 35 35 35 35 35 30 30 25 MIX HGT (KFT)...0.3 1.3 2.4 3.4 4.1 4.8 5.5 7.0 8.4 9.9 9.4 8.9 MIXNG WIND DIR..NW NW NW NW NW NW NW NW NW NW NW NW MIXNG WIND SPD..20 25 31 36 37 37 35 32 30 26 25 23 HAINES INDEX....4 4 5 5 5 5 5 5 6 6 6 6 .TONIGHT... SKY/WEATHER.........MOSTLY CLOUDY (50-60 PERCENT) THEN BECOMING PARTLY CLOUDY (45-55 PERCENT) THEN BECOMING MOSTLY CLOUDY (50-60 PERCENT) THEN BECOMING PARTLY CLOUDY (35-45 PERCENT). MIN TEMPERATURE.....AROUND 42. MAX HUMIDITY........68 PERCENT. EYE LEVEL WINDS.....WEST WINDS 6 TO 11 MPH. HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......8400 FT AGL DECREASING TO 300 FT AGL. MIXING WINDS........NORTHWEST 15 TO 21 MPH BECOMING WEST 3 TO 9 MPH EARLY IN THE EVENING. SMOKE DISPERSAL.....EXCELLENT (150300 KNOT-FT) DECREASING TO POOR (2000 KNOT-FT) IN THE LATE EVENING AND OVERNIGHT. TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM SKY (%).........54 51 55 58 51 42 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............58 53 50 48 46 45 RH..............34 44 52 56 63 65 EYE LEVEL WIND..NW 9 W 5 W 5 SW 5 W 5 W 5 EYE LEVEL WIND..20 10 MIX HGT (FT)....8400 3000 300 300 300 300 MIXNG WIND......NW 21 NW 8 W 3 SW 8 SW 9 W 9 HAINES INDEX....6 5 5 4 4 4 .WEDNESDAY... SKY/WEATHER.........SUNNY (20-30 PERCENT). MAX TEMPERATURE.....AROUND 69. MIN HUMIDITY........32 PERCENT. EYE LEVEL WINDS.....NORTHWEST WINDS 5 TO 6 MPH UNTIL LATE AFTERNOON BECOMING LIGHT. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......2200 FT AGL INCREASING TO 7000 FT AGL. MIXING WINDS........NORTHWEST 7 TO 16 MPH SHIFTING TO THE WEST 3 TO 6 MPH LATE IN THE AFTERNOON. SMOKE DISPERSAL.....EXCELLENT (67900 KNOT-FT). TIME (CDT) 7 AM 10 AM 1 PM 4 PM SKY (%).........35 32 29 21 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE TEMP............44 55 64 68 RH..............68 47 35 32 EYE LEVEL WIND..W 5 N 4G5 NW 5G10 NW 4G5 MIX HGT (FT)....300 2200 6800 7000 MIXNG WIND......W 9 NW 16 NW 12 W 6 HAINES INDEX....4 3 4 4 $$ FORECASTER...BOKSA REQUESTED BY...JAMES KRIZMAN TYPE OF REQUEST...PRESCRIBED .TAG 20090421.NORTH.02/DMX