FNUS73 KDMX 211436 FWSDMX SPOT FORECAST FOR OTTOSEN POTHOLES...IOWA DNR NATIONAL WEATHER SERVICE DES MOINES IA 936 AM CDT MON MAY 21 2012 FORECAST IS BASED ON IGNITION TIME OF 1200 CDT ON MAY 21. 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 IS CENTERED OVER THE AREA THIS MORNING. LIGHT AND VARIABLE WINDS WILL REMAIN OVER THE FORECAST SITE THROUGH EARLY TO MID AFTERNOON. THE SWITCH TO LIGHT SOUTHEAST WINDS WILL OCCUR LATE THIS AFTERNOON INTO THE EARLY EVENING. RELATIVE HUMIDITY VALUES THIS AFTERNOON WILL BE IN THE 20S DUE TO TEMPERATURES IN THE MID 70S AND DEWPOINTS IN THE UPPER 30S. .TODAY... SKY/WEATHER.........SUNNY (10-20 PERCENT). MAX TEMPERATURE.....AROUND 76. MIN HUMIDITY........26 PERCENT. EYE LEVEL WINDS.....NORTH WINDS 5 TO 6 MPH SHIFTING TO THE EAST AROUND 5 MPH LATE IN THE AFTERNOON...THEN BECOMING LIGHT LATE IN THE AFTERNOON. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......1600 FT AGL INCREASING TO 8300 FT AGL. MIXING WINDS........NORTH 3 TO 12 MPH SHIFTING TO THE NORTHEAST AROUND 2 MPH LATE IN THE AFTERNOON...THEN SHIFTING TO THE SOUTHEAST AROUND 3 MPH LATE IN THE AFTERNOON. SMOKE DISPERSAL.....POOR TO GOOD (1500-48200 KNOT-FT). WIND (20 FT)........NORTH WINDS 5 TO 6 MPH SHIFTING TO THE EAST AROUND 5 MPH LATE IN THE AFTERNOON...THEN BECOMING LIGHT LATE IN THE AFTERNOON. TIME (CDT) 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........13 14 15 18 21 23 26 WEATHER COV..... WEATHER TYPE.... TSTM COV........ TEMP............67 70 72 74 75 74 74 RH..............34 31 29 27 26 26 26 20 FT WIND DIR..N N N NE E E SE 20 FT WIND SPD..6 6 6 5 5 3 3 20 FT WIND GUST. 5 5 EYE LVL WND DIR.N N N NE E E SE EYE LVL WND SPD.4 4 4 4 4 2 2 EYE LVL WND GST. 5 5 MIX HGT (KFT)...6.2 7.2 7.6 7.9 8.3 7.7 7.0 MIXNG WIND DIR..N N N N N NE SE MIXNG WIND SPD..9 7 5 3 2 2 3 HAINES INDEX....4 4 4 5 5 5 4 $$ FORECASTER...DONAVON REQUESTED BY...DAVE WHITE TYPE OF REQUEST...PRESCRIBED .TAG 20120521.OTTOS.01/DMX