FNUS73 KDMX 221248 FWSDMX SPOT FORECAST FOR CHAPMAN WMA...IOWA DNR NATIONAL WEATHER SERVICE DES MOINES IA 748 AM CDT THU APR 22 2010 FORECAST IS BASED ON IGNITION TIME OF 1030 CDT ON APRIL 22. 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... HIGH PRESSURE WILL SHIFT EASTWARD TODAY...ALLOWING LIGHT AND VARIABLE WINDS TO BECOME MORE SOUTHERLY BY THIS AFTERNOON AND INCREASE TO AROUND 10 TO 20 MPH. MEANWHILE A DEVELOPING LOW PRESSURE CENTER WILL MOVE TOWARD THE AREA...BRINGING INCREASING CHANCES FOR SHOWERS AND THUNDERSTORMS FROM LATE TODAY THROUGH TONIGHT AND INTO THE WEEKEND. .TODAY... SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT). TEMPERATURE.........60 AT IGNITION...MAX 72. MIN HUMIDITY........43 PERCENT AT IGNITION...MIN 30 PERCENT. WIND (EYE LEVEL)....LIGHT WINDS BECOMING SOUTH 5 TO 8 MPH EARLY IN THE MORNING. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......1000 FT AGL INCREASING TO 9200 FT AGL. MIXING WINDS........SOUTH 7 TO 13 MPH. SMOKE DISPERSAL.....GOOD (55000 KNOT-FT) INCREASING TO GOOD (81200 KNOT-FT) LATE IN THE AFTERNOON. TIME (CDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........34 33 33 32 32 31 30 31 31 WEATHER COV..... WEATHER TYPE.... TEMP............55 60 63 66 68 70 71 70 70 RH..............43 36 34 32 31 30 30 31 31 EYE LVL WND DIR.SE SE S S S S S S S EYE LVL WND SPD.4 5 5 5 6 6 6 6 6 EYE LVL WND GST.5 10 10 10 15 15 15 MIX HGT (KFT)...1.0 3.0 5.1 7.1 7.8 8.5 9.2 8.3 7.5 MIXNG WIND DIR..SE SE SE SE SE S S S S MIXNG WIND SPD..10 10 9 8 8 7 8 10 13 HAINES INDEX....4 4 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 (60-70 PERCENT). CHANCE OF SHOWERS AND THUNDERSTORMS EARLY IN THE MORNING. MIN TEMPERATURE.....49. MAX HUMIDITY........80 PERCENT. WIND (EYE LEVEL)....EAST WINDS 6 TO 11 MPH. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......6700 FT AGL DECREASING TO 300 FT AGL. MIXING WINDS........SOUTHEAST 8 TO 14 MPH. SMOKE DISPERSAL.....GOOD (79800 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 (%).........52 50 48 47 56 64 WEATHER COV..... CHANCE WEATHER TYPE....NONE NONE NONE NONE NONE RNSHWR TEMP............68 62 59 56 54 52 RH..............34 46 55 66 71 77 EYE LEVEL WIND..SE 6 SE 6 SE 6 E 5 E 6 E 7 EYE LEVEL WIND..15 15 10 10 10 15 MIX HGT (FT)....6700 2400 300 300 300 300 MIXNG WIND......S 14 SE 10 SE 8 SE 8 SE 8 SE 8 HAINES INDEX....5 4 4 3 2 2 .FRIDAY... SKY/WEATHER.........MOSTLY CLOUDY (80-90 PERCENT). RAIN SHOWERS LIKELY THROUGH THE DAY. THUNDERSTORMS LIKELY IN THE AFTERNOON. MAX TEMPERATURE.....64. MIN HUMIDITY........60 PERCENT. WIND (EYE LEVEL)....EAST WINDS 12 TO 15 MPH. HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......2100 FT AGL INCREASING TO 4000 FT AGL LATE IN THE MORNING. MIXING WINDS........SOUTHEAST 12 TO 21 MPH INCREASING TO 25 TO 32 MPH IN THE LATE MORNING AND AFTERNOON. SMOKE DISPERSAL.....POOR (18800 KNOT-FT) INCREASING TO EXCELLENT (109700 KNOT-FT). TIME (CDT) 7 AM 10 AM 1 PM 4 PM SKY (%).........73 82 91 95 WEATHER COV.....LIKELY LIKELY LIKELY LIKELY WEATHER TYPE....RNSHWR RNSHWR RNSHWR RNSHWR TEMP............51 56 61 63 RH..............80 72 62 62 EYE LEVEL WIND..E 10G20 E 11G25 E 12G25 E 11G25 MIX HGT (FT)....300 1400 3400 4000 MIXNG WIND......E 12 SE 25 E 30 SE 31 HAINES INDEX....2 3 3 3 $$ FORECASTER...LEE REQUESTED BY...STEVEN WOODRUFF TYPE OF REQUEST...PRESCRIBED .TAG 20100422.CHAPM.01/DMX