FNUS73 KDMX 031531 FWSDMX SPOT FORECAST FOR BIG CREEK WMA...IOWA DNR NATIONAL WEATHER SERVICE DES MOINES IA 1031 AM CDT FRI APR 3 2009 FORECAST IS BASED ON IGNITION TIME OF 1200 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 (30-40 PERCENT). MAX TEMPERATURE.....AROUND 56. MIN HUMIDITY........32 PERCENT. EYE LEVEL WINDS.....LIGHT WINDS BECOMING NORTHWEST AROUND 5 MPH EARLY IN THE AFTERNOON...THEN SHIFTING TO THE EAST EARLY IN THE AFTERNOON. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......2100 FT AGL INCREASING TO 4400 FT AGL IN THE AFTERNOON. MIXING WINDS........NORTH 3 TO 10 MPH SHIFTING TO THE EAST AROUND 3 MPH LATE IN THE AFTERNOON. SMOKE DISPERSAL.....FAIR (27400 KNOT-FT). TIME (CDT) 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........15 17 23 32 35 41 56 WEATHER COV..... WEATHER TYPE.... TEMP............40 43 46 49 52 56 53 RH..............55 49 43 40 36 32 36 EYE LVL WND DIR.N NW N NE E E E EYE LVL WND SPD.3 4 4 4 4 4 4 EYE LVL WND GST.5 10 10 10 10 10 10 MIX HGT (KFT)...2.1 3.0 3.5 4.0 4.4 4.2 3.9 MIXNG WIND DIR..N NW NW N N N E MIXNG WIND SPD..10 10 8 6 3 3 3 HAINES INDEX....4 4 4 4 4 4 4 .TONIGHT... SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT). MIN TEMPERATURE.....AROUND 33. MAX HUMIDITY........75 PERCENT. EYE LEVEL WINDS.....EAST WINDS 5 TO 7 MPH. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......3600 FT AGL DECREASING TO 1400 FT AGL EARLY IN THE EVENING. MIXING WINDS........EAST 5 TO 14 MPH INCREASING TO AROUND 17 MPH EARLY IN THE MORNING. SMOKE DISPERSAL.....FAIR (14600 KNOT-FT). TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM SKY (%).........62 60 57 55 62 71 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............50 45 42 40 38 36 RH..............42 49 57 62 67 72 EYE LEVEL WIND..E 4 SE 4 SE 4 SE 5 E 5 E 6 EYE LEVEL WIND..10 5 5 10 10 MIX HGT (FT)....3600 1400 300 300 300 300 MIXNG WIND......E 5 SE 6 E 6 E 7 E 8 E 14 HAINES INDEX....4 4 4 4 4 4 $$ FORECASTER...BOKSA REQUESTED BY...IOWA DNR TYPE OF REQUEST...PRESCRIBED .TAG 20090403.BIGCR.01/DMX