FNUS73 KDMX 171359 FWSDMX SPOT FORECAST FOR OTTOSEN POTHOLES...IOWA DNR NATIONAL WEATHER SERVICE DES MOINES IA 859 AM CDT THU MAY 17 2012 FORECAST IS BASED ON IGNITION TIME OF 1100 CDT ON MAY 17. 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... A SHARP PRESSURE GRADIENT AND GOOD MIXING WILL LEAD TO GUSTY SOUTH WINDS LATE THIS MORNING AND INTO THE AFTERNOON HOURS. WINDS WILL DIMINISH SLIGHTLY BY AROUND SUNSET TONIGHT...BUT ARE LIKELY TO REMAIN STEADY OUT OF THE SOUTH OVERNIGHT INTO FRIDAY. THERE IS THE POTENTIAL FOR SOME GUSTS TO REACH 40 MPH AT TIMES DURING THE AFTERNOON. .TODAY... SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT). TEMPERATURE.........72 AT IGNITION...MAX 82. RH..................39 PERCENT AT IGNITION...MIN 30 PERCENT. EYE LEVEL WINDS.....SOUTH WINDS 15 TO 24 MPH. HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......2200 FT AGL INCREASING TO 3800 FT AGL IN THE LATE MORNING AND AFTERNOON. MIXING WINDS........SOUTH 16 TO 25 MPH INCREASING TO 30 TO 32 MPH IN THE LATE MORNING AND AFTERNOON. SMOKE DISPERSAL.....POOR TO GOOD (3500-35000 KNOT-FT) INCREASING TO GOOD TO EXCELLENT (57400-97900 KNOT-FT) IN THE LATE MORNING AND AFTERNOON. WIND (20 FT)........WINDS SOUTH AT 22 MPH AT IGNITION...OTHERWISE SOUTH WINDS 15 TO 24 MPH. GUSTS UP TO 40 MPH IN THE LATE MORNING AND AFTERNOON. TIME (CDT) 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........26 24 23 23 24 24 25 25 WEATHER COV..... WEATHER TYPE.... TSTM COV........ TEMP............72 74 77 79 80 81 80 80 RH..............39 38 35 32 31 30 31 31 20 FT WIND DIR..S S S S S S S S 20 FT WIND SPD..22 23 24 24 24 24 23 22 20 FT WIND GUST.30 30 30 30 30 35 30 30 EYE LVL WND DIR.S S S S S S S S EYE LVL WND SPD.16 16 17 17 17 17 16 16 EYE LVL WND GST.30 30 30 30 30 35 30 30 MIX HGT (KFT)...2.5 2.7 3.0 3.2 3.5 3.8 3.5 3.2 MIXNG WIND DIR..S S S S S S S S MIXNG WIND SPD..31 31 31 31 30 30 31 32 HAINES INDEX....5 5 5 5 6 6 6 6 $$ FORECASTER...PODRAZIK REQUESTED BY...DAVE WHITE TYPE OF REQUEST...PRESCRIBED .TAG 20120517.OTTOS.01/DMX