FNUS73 KDMX 281015 FWSDMX SPOT FORECAST FOR GRASS LAKE...IOWA DNR NATIONAL WEATHER SERVICE DES MOINES IA 515 AM CDT WED MAR 28 2012 FORECAST IS BASED ON IGNITION TIME OF 1000 CDT ON MARCH 28. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. AN INITIAL OBSERVATION AT IGNITION AND A MID BURN OBSERVATION ARE REQUIRED... PLEASE RELAY THEM TO THE NATIONAL WEATHER SERVICE FOR EACH PRESCRIBED BURN. .DISCUSSION... HIGH PRESSURE WILL BUILD INTO THE STATE TODAY WITH GENERALLY SUNNY SKIES AND WINDS MUCH LIGHTER THAN TUESDAY. STILL ANTICIPATE NORTHWEST SURFACE WINDS BUT DIMINISHING INTO THE LATER PART OF THE AFTERNOON AS THE HIGH PRESSURE APPROACHES. .TODAY... SKY/WEATHER.........SUNNY (5-15 PERCENT). TEMPERATURE.........49 AT IGNITION...MAX 62. RH..................63 PERCENT AT IGNITION...MIN 36 PERCENT. EYE LEVEL WINDS.....NORTH WINDS 7 TO 13 MPH. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......2000 FT AGL INCREASING TO 4600 FT AGL. MIXING WINDS........NORTHWEST 7 TO 16 MPH SHIFTING TO THE NORTH AROUND 9 MPH LATE IN THE AFTERNOON. SMOKE DISPERSAL.....POOR THIS MORNING (5500 KNOT-FT) INCREASING TO GOOD (45000 KNOT-FT) IN THE AFTERNOON. WIND (20 FT)........WINDS NORTHWEST AT 13 MPH AT IGNITION... OTHERWISE NORTH WINDS 7 TO 13 MPH. TIME (CDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........10 11 11 11 11 10 10 10 9 WEATHER COV..... WEATHER TYPE.... TSTM COV........ TEMP............49 52 55 58 60 61 62 61 60 RH..............63 56 51 45 41 39 36 38 41 20 FT WIND DIR..NW NW NW NW NW N N N N 20 FT WIND SPD..13 13 13 13 12 10 9 8 7 20 FT WIND GUST.15 15 15 15 15 15 10 10 EYE LVL WND DIR.NW NW NW NW NW N N N N EYE LVL WND SPD.9 9 9 9 9 7 6 6 5 EYE LVL WND GST.15 15 15 15 15 15 10 10 MIX HGT (KFT)...2.0 2.6 3.3 3.9 4.1 4.4 4.6 4.3 4.0 MIXNG WIND DIR..NW NW NW NW NW NW NW NW N MIXNG WIND SPD..20 21 21 20 18 17 15 13 9 HAINES INDEX....3 3 4 4 4 3 3 3 4 .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT). TEMPERATURE.........MIN 40. RH..................MAX 0 PERCENT. EYE LEVEL WINDS.....SOUTHEAST WINDS 7 TO 12 MPH. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......3600 FT AGL DECREASING TO 1400 FT AGL EARLY IN THE EVENING. MIXING WINDS........SOUTHEAST 6 TO 10 MPH. SMOKE DISPERSAL.....POOR TO FAIR (1500-21800 KNOT-FT). WIND (20 FT)........SOUTHEAST WINDS 7 TO 12 MPH. TIME (CDT) 7 PM 10 PM 1 AM 4 AM SKY (%).........9 18 27 37 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE TSTM COV........ TEMP............59 48 43 41 RH..............42 65 79 85 20 FT WIND......NE 7 E 8G10 E 9G10 E 10G15 EYE LEVEL WIND..NE 5 E 6G10 E 6G10 E 7G15 MIX HGT (FT)....3600 300 300 300 MIXNG WIND......N 7 NE 7 E 8 SE 9 HAINES INDEX....4 5 4 5 $$ FORECASTER...COGIL REQUESTED BY...DAVE WHITE TYPE OF REQUEST...PRESCRIBED .TAG 20120328.GRASS.01/DMX