FNUS73 KDMX 190922 FWSDMX SPOT FORECAST FOR BIG CREEK NE UNIT...IOWA DNR NATIONAL WEATHER SERVICE DES MOINES IA 422 AM CDT THU MAR 19 2009 FORECAST IS BASED ON IGNITION TIME OF 1000 CDT ON MARCH 19. 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... HIGH PRESSURE WILL MOVE ACROSS THE REGION TODAY AND WILL BRING A LIGHT NORTHERLY FLOW TO THE STATE. A FEW CLOUDS CAN BE EXPECTED THIS MORNING THEN DECREASING THIS AFTERNOON. DRIER AIR MOVING IN TODAY WILL HELP PUSH RELATIVE HUMIDITY VALUES INTO THE MID 30S THIS AFTERNOON. .TODAY... SKY/WEATHER.........MOSTLY SUNNY (35-45 PERCENT). MAX TEMPERATURE.....AROUND 52. MIN HUMIDITY........33 PERCENT. EYE LEVEL WINDS.....LIGHT WINDS BECOMING NORTHEAST 5 TO 6 MPH UNTIL LATE AFTERNOON...THEN BECOMING LIGHT EARLY IN THE AFTERNOON BECOMING EAST AROUND 5 MPH LATE IN THE AFTERNOON. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......2000 FT AGL INCREASING TO 4500 FT AGL LATE IN THE MORNING...THEN INCREASING TO 5000 FT AGL LATE IN THE AFTERNOON DECREASING TO 2000 FT AGL LATE IN THE AFTERNOON. MIXING WINDS........WEST 5 TO 8 MPH. SMOKE DISPERSAL.....GOOD (34900 KNOT-FT). TIME (CDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........41 37 28 23 23 23 23 24 26 WEATHER COV..... WEATHER TYPE.... TEMP............39 42 45 47 49 50 51 50 49 RH..............54 46 41 37 36 34 33 36 37 EYE LVL WND DIR.NE NE NE N NE NE NE NE E EYE LVL WND SPD.5 5 5 5 4 3 2 2 4 EYE LVL WND GST.10 10 10 5 5 5 5 5 MIX HGT (KFT)...1.3 2.0 2.7 3.5 4.0 4.5 5.0 3.5 2.0 MIXNG WIND DIR..NE NE N NW NW W W W W MIXNG WIND SPD..6 6 6 6 7 8 8 7 7 HAINES INDEX....5 5 4 4 4 4 4 4 4 .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT). MIN TEMPERATURE.....AROUND 32. MAX HUMIDITY........75 PERCENT. EYE LEVEL WINDS.....SOUTHEAST WINDS 6 TO 8 MPH. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......500 FT AGL. MIXING WINDS........NORTHWEST AROUND 6 MPH SHIFTING TO THE SOUTHEAST 7 TO 8 MPH EARLY IN THE EVENING. SMOKE DISPERSAL.....POOR (2600 KNOT-FT). TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM SKY (%).........21 24 27 30 34 41 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............48 43 40 39 37 35 RH..............39 49 55 57 61 69 EYE LEVEL WIND..E 5 SE 5 SE 5 SE 5 SE 5 SE 6 EYE LEVEL WIND..10 10 10 10 10 15 MIX HGT (FT)....500 300 300 300 300 300 MIXNG WIND......W 6 NE 7 E 7 E 7 E 8 SE 8 HAINES INDEX....4 4 4 4 4 4 .FRIDAY... SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT). MAX TEMPERATURE.....AROUND 56. MIN HUMIDITY........45 PERCENT. EYE LEVEL WINDS.....SOUTH WINDS 9 TO 14 MPH. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......2200 FT AGL INCREASING TO 4100 FT AGL IN THE AFTERNOON...THEN DECREASING TO 1700 FT AGL LATE IN THE AFTERNOON. MIXING WINDS........SOUTH 8 TO 16 MPH INCREASING TO 22 TO 31 MPH LATE IN THE MORNING. SMOKE DISPERSAL.....GOOD (40500 KNOT-FT) INCREASING TO EXCELLENT (105400 KNOT-FT) IN THE AFTERNOON. TIME (CDT) 7 AM 10 AM 1 PM 4 PM SKY (%).........44 50 61 65 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE TEMP............35 41 50 55 RH..............69 65 52 45 EYE LEVEL WIND..S 7G15 S 10G20 S 11G25 S 11G25 MIX HGT (FT)....300 500 3000 4100 MIXNG WIND......SE 8 S 12 S 26 S 30 HAINES INDEX....4 4 5 4 $$ FORECASTER...DONAVON REQUESTED BY...IOWA DNR TYPE OF REQUEST...PRESCRIBED .TAG 20090319.BIGCR.01/DMX