FNUS73 KDMX 031532 FWSDMX SPOT FORECAST FOR BIG MARSH...IOWA DNR NATIONAL WEATHER SERVICE DES MOINES IA 1032 AM CDT FRI APR 3 2009 FORECAST IS BASED ON IGNITION TIME OF 1010 CDT ON APRIL 03. 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 HIGH PRESSURE RIDGE WILL SHIFT EAST ACROSS THE AREA THROUGH TONIGHT. THE WIND WILL GRADUALLY SHIFT FROM THE NORTH OR NORTHEAST TO THE SOUTHEAST BUT WIND SPEEDS ARE EXPECTED TO BE LIGHT. LATE TONIGHT A DEVELOPING LOW PRESSURE SYSTEM WILL AFFECT THE WEST BY INCREASING WIND SPEEDS AND CLOUD COVER. .TODAY... SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT). MAX TEMPERATURE.....AROUND 52. MIN HUMIDITY........38 PERCENT. EYE LEVEL WINDS.....LIGHT WINDS BECOMING NORTHWEST AROUND 5 MPH EARLY IN THE MORNING...THEN BECOMING LIGHT EARLY IN THE MORNING BECOMING NORTH 6 TO 9 MPH IN THE LATE MORNING AND AFTERNOON. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......1500 FT AGL INCREASING TO 5100 FT AGL. MIXING WINDS........NORTH 7 TO 14 MPH. SMOKE DISPERSAL.....GOOD (47000 KNOT-FT). TIME (CDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........6 7 8 8 9 20 26 34 47 WEATHER COV..... WEATHER TYPE.... TEMP............33 36 38 41 44 47 49 52 50 RH..............82 72 64 57 51 45 42 38 41 EYE LVL WND DIR.N N N N N N N N N EYE LVL WND SPD.2 5 6 6 7 6 6 5 5 EYE LVL WND GST.5 10 15 15 15 15 15 10 10 MIX HGT (KFT)...0.4 1.5 2.6 3.7 4.1 4.6 5.1 4.6 4.2 MIXNG WIND DIR..N N N N N N N N N MIXNG WIND SPD..13 14 14 14 13 12 10 9 8 HAINES INDEX....4 4 4 4 4 4 4 4 4 .TONIGHT... SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT). MIN TEMPERATURE.....AROUND 29. MAX HUMIDITY........81 PERCENT. EYE LEVEL WINDS.....EAST WINDS 5 TO 7 MPH. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......3700 FT AGL DECREASING TO 1400 FT AGL EARLY IN THE EVENING. MIXING WINDS........EAST 6 TO 13 MPH. SMOKE DISPERSAL.....FAIR (22300 KNOT-FT). TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM SKY (%).........54 57 62 65 68 73 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............47 42 39 36 34 32 RH..............43 50 59 67 72 78 EYE LEVEL WIND..N 4 NE 4 E 4 E 4 E 5 E 5 EYE LEVEL WIND..10 5 5 5 10 MIX HGT (FT)....3700 1400 300 300 300 300 MIXNG WIND......N 7 NE 6 NE 6 NE 7 E 7 E 10 HAINES INDEX....4 4 4 4 3 3 .SATURDAY... SKY/WEATHER.........MOSTLY CLOUDY (80-90 PERCENT). CHANCE OF RAIN. MAX TEMPERATURE.....AROUND 45. MIN HUMIDITY........57 PERCENT. EYE LEVEL WINDS.....EAST WINDS 7 TO 15 MPH. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......2200 FT AGL INCREASING TO 2800 FT AGL IN THE AFTERNOON. MIXING WINDS........EAST 13 TO 20 MPH INCREASING TO 23 TO 31 MPH IN THE AFTERNOON. SMOKE DISPERSAL.....EXCELLENT (67400 KNOT-FT) INCREASING TO EXCELLENT (76700 KNOT-FT) LATE IN THE AFTERNOON. TIME (CDT) 7 AM 10 AM 1 PM 4 PM SKY (%).........77 85 92 94 WEATHER COV.....CHANCE CHANCE CHANCE CHANCE WEATHER TYPE....RAIN RAIN RAIN RAIN TEMP............32 36 42 44 RH..............78 72 62 57 EYE LEVEL WIND..E 6G10 E 8G15 E 10G25 E 11G25 MIX HGT (FT)....300 700 2200 2800 MIXNG WIND......E 15 E 13 E 23 E 31 HAINES INDEX....3 3 2 4 $$ FORECASTER...BOKSA REQUESTED BY...JUSTIN CLARK TYPE OF REQUEST...PRESCRIBED .TAG 20090403.BIGMA.01/DMX