FNUS73 KDMX 131312 FWSDMX SPOT FORECAST FOR BIG MARSH...IOWA DNR NATIONAL WEATHER SERVICE DES MOINES IA 812 AM CDT TUE APR 13 2010 FORECAST IS BASED ON IGNITION TIME OF 0820 CDT ON APRIL 13. 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... EXPECT WINDS INITIALLY FROM THE SOUTH SOUTHEAST TO BECOME SOUTH AND INCREASE THROUGH THE DAY. LITTLE THREAT FOR PRECIPITATION THROUGH TONIGHT. .TODAY... SKY/WEATHER.........SUNNY (20-30 PERCENT). TEMPERATURE.........59 AT IGNITION...MAX 81. MIN HUMIDITY........80 PERCENT AT IGNITION...MIN 39 PERCENT. WIND (EYE LEVEL)....SOUTH WINDS 7 TO 16 MPH. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......1100 FT AGL INCREASING TO 7100 FT AGL. MIXING WINDS........SOUTH 7 TO 14 MPH INCREASING TO AROUND 28 MPH. SMOKE DISPERSAL.....FAIR (41600 KNOT-FT) INCREASING TO EXCELLENT (151800 KNOT-FT). TIME (CDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........32 27 23 19 14 12 12 12 13 13 13 WEATHER COV..... WEATHER TYPE.... TEMP............55 59 64 68 71 74 76 78 80 79 78 RH..............80 72 63 54 51 48 45 42 39 41 42 EYE LVL WND DIR.E SE SE SE SE S S S S S S EYE LVL WND SPD.6 6 7 9 10 11 12 13 13 12 11 EYE LVL WND GST.15 15 15 20 20 25 25 30 30 25 25 MIX HGT (KFT)...0.5 0.8 1.1 2.6 4.1 5.6 6.1 6.6 7.1 6.7 6.3 MIXNG WIND DIR..SE SE SE SE S S S S S S S MIXNG WIND SPD..7 8 9 10 12 14 17 20 23 26 28 HAINES INDEX....3 4 4 4 5 5 5 4 4 4 4 .TONIGHT... SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT). MIN TEMPERATURE.....56. MAX HUMIDITY........75 PERCENT. WIND (EYE LEVEL)....SOUTHEAST WINDS 9 TO 13 MPH. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......5900 FT AGL DECREASING TO 500 FT AGL. MIXING WINDS........SOUTH 24 TO 28 MPH DECREASING TO 12 TO 18 MPH EARLY IN THE EVENING. SMOKE DISPERSAL.....EXCELLENT (140900 KNOT-FT) DECREASING TO POOR (12700 KNOT-FT) IN THE LATE EVENING AND OVERNIGHT. TIME (CDT) 7 PM 10 PM 1 AM 4 AM SKY (%).........20 21 23 27 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE TEMP............75 67 63 60 RH..............43 56 62 67 EYE LEVEL WIND..S 10G25 SE 10G20 SE 9G20 SE 8G15 MIX HGT (FT)....5900 1100 300 300 MIXNG WIND......S 28 SE 14 SE 13 S 12 HAINES INDEX....4 4 4 4 .WEDNESDAY... SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT) THEN BECOMING MOSTLY CLOUDY (70-80 PERCENT). CHANCE OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. MAX TEMPERATURE.....77. MIN HUMIDITY........45 PERCENT. WIND (EYE LEVEL)....SOUTH WINDS 10 TO 17 MPH. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......1600 FT AGL INCREASING TO 7000 FT AGL. MIXING WINDS........SOUTH 13 TO 21 MPH INCREASING TO SOUTHWEST 25 TO 32 MPH IN THE LATE MORNING AND AFTERNOON. SMOKE DISPERSAL.....POOR (21600 KNOT-FT) INCREASING TO EXCELLENT (189500 KNOT-FT). TIME (CDT) 7 AM 10 AM 1 PM 4 PM SKY (%).........30 53 76 78 WEATHER COV..... CHANCE CHANCE WEATHER TYPE....NONE NONE RNSHWR RNSHWR TEMP............57 66 73 76 RH..............75 58 49 45 EYE LEVEL WIND..S 8G15 S 11G25 S 14G30 S 12G25 MIX HGT (FT)....300 1600 5800 7000 MIXNG WIND......S 13 S 25 SW 30 S 31 HAINES INDEX....4 4 4 4 $$ FORECASTER...COGIL REQUESTED BY...JUSTIN CLARK TYPE OF REQUEST...PRESCRIBED .TAG 20100413.BIGMA.01/DMX