FNUS73 KDMX 311300 FWSDMX SPOT FORECAST FOR MT AYR...IOWA DNR NATIONAL WEATHER SERVICE DES MOINES IA 800 AM CDT WED MAR 31 2010 FORECAST IS BASED ON IGNITION TIME OF 0900 CDT ON MARCH 31. 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 WEAK COLD FRONT WILL MOVE THROUGH NORTHERN IOWA THIS MORNING. RELATIVE HUMIDITY VALUES WILL BE QUITE LOW AGAIN TODAY...ESPECIALLY DURING THE AFTERNOON HOURS. THURSDAY WILL BE WARMER AND MORE HUMID...BUT SOUTHERLY WINDS WILL BE GUSTY ONCE AGAIN. .TODAY... SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT). TEMPERATURE.........61 AT IGNITION...MAX 78. MIN HUMIDITY........49 PERCENT AT IGNITION...MIN 33 PERCENT. WIND (EYE LEVEL)....SOUTHWEST WINDS 6 TO 12 MPH IN THE MORNING BECOMING LIGHT. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......2700 FT AGL INCREASING TO 4200 FT AGL IN THE AFTERNOON. MIXING WINDS........SOUTHWEST 13 TO 22 MPH BECOMING SOUTH 2 TO 7 MPH IN THE AFTERNOON. SMOKE DISPERSAL.....FAIR (49400 KNOT-FT). TIME (CDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........32 32 31 27 26 26 27 27 26 23 WEATHER COV..... WEATHER TYPE.... TEMP............61 65 68 71 73 75 76 77 76 75 RH..............49 45 40 38 35 34 33 33 34 37 EYE LVL WND DIR.SW SW SW SW SW SW W W SW SE EYE LVL WND SPD.10 10 8 6 5 3 2 2 2 2 EYE LVL WND GST.20 20 15 15 5 5 MIX HGT (KFT)...2.1 2.6 2.6 2.7 2.7 3.1 3.4 3.8 4.0 4.2 MIXNG WIND DIR..SW SW SW SW W SW SW SW S SE MIXNG WIND SPD..21 22 18 13 7 5 2 2 2 2 HAINES INDEX....4 4 4 4 4 4 4 4 4 4 .TONIGHT... SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT). MIN TEMPERATURE.....55. MAX HUMIDITY........67 PERCENT. WIND (EYE LEVEL)....LIGHT WINDS BECOMING SOUTHEAST 5 TO 7 MPH IN THE LATE EVENING AND OVERNIGHT. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......4400 FT AGL DECREASING TO 1700 FT AGL EARLY IN THE EVENING. MIXING WINDS........SOUTHEAST 3 TO 9 MPH. SMOKE DISPERSAL.....POOR (13200 KNOT-FT). TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM SKY (%).........21 16 10 5 8 11 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............74 68 65 62 60 59 RH..............38 49 54 62 64 64 EYE LEVEL WIND..E 2 SE 3 SE 5 SE 5 SE 5 SE 5 EYE LEVEL WIND.. 5 10 10 MIX HGT (FT)....4400 1700 300 300 300 300 MIXNG WIND......SE 3 E 5 E 6 E 7 SE 8 SE 9 HAINES INDEX....4 4 4 3 3 3 .THURSDAY... SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT). MAX TEMPERATURE.....81. MIN HUMIDITY........42 PERCENT. WIND (EYE LEVEL)....SOUTH WINDS 8 TO 17 MPH INCREASING TO 17 TO 19 MPH IN THE AFTERNOON. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......2200 FT AGL INCREASING TO 2800 FT AGL LATE IN THE MORNING. MIXING WINDS........SOUTH 12 TO 18 MPH INCREASING TO 22 TO 26 MPH IN THE LATE MORNING AND AFTERNOON. SMOKE DISPERSAL.....GOOD (50300 KNOT-FT) INCREASING TO GOOD (62400 KNOT-FT) IN THE AFTERNOON. TIME (CDT) 7 AM 10 AM 1 PM 4 PM SKY (%).........30 25 36 35 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE TEMP............57 66 75 80 RH..............67 56 48 42 EYE LEVEL WIND..S 6G15 S 11G25 S 14G30 S 15G30 MIX HGT (FT)....300 2000 2800 2700 MIXNG WIND......S 12 S 22 S 23 S 24 HAINES INDEX....3 4 4 4 $$ FORECASTER...MOYER REQUESTED BY...NATURAL RESOURCE TECH TYPE OF REQUEST...PRESCRIBED .TAG 20100331.MTAYR.03/DMX