FNUS73 KDMX 051148 FWSDMX SPOT FORECAST FOR BIG CREEK WMA...IOWA DNR NATIONAL WEATHER SERVICE DES MOINES IA 648 AM CDT THU MAY 5 2011 FORECAST IS BASED ON IGNITION TIME OF 1000 CDT ON MAY 05. 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... AN AREA OF LOW PRESSURE WILL MOVE FROM NORTHWEST IOWA INTO NORTHWEST WISCONSIN THROUGH THE DAY. AN ASSOCIATED COLD FRONT WILL MOVE THROUGH THE STATE ALLOWING SOUTHWESTERLY WINDS TO SHIFT TO THE WEST TO NORTHWEST BEHIND THE FRONT. AN ISOLATED SHOWER OR THUNDERSTORM COULD REDEVELOP LATER TODAY AS ANOTHER UPPER LEVEL DISTURBANCE TRAVELS ACROSS THE STATE. WINDS ARE EXPECTED TO BE GUSTY BOTH AHEAD AND BEHIND THE FRONT. .TODAY... SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). SLIGHT CHANCE OF RAIN SHOWERS AND ISOLATED THUNDERSTORMS IN THE AFTERNOON. MAX TEMPERATURE.....AROUND 68. MIN HUMIDITY........36 PERCENT. EYE LEVEL WINDS.....NORTHWEST WINDS 16 TO 18 MPH. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......2700 FT AGL INCREASING TO 10800 FT AGL. MIXING WINDS........NORTHWEST 17 TO 22 MPH. SMOKE DISPERSAL.....GOOD (66300 KNOT-FT) INCREASING TO EXCELLENT (163700 KNOT-FT). WIND (20 FT)........NORTHWEST WINDS 16 TO 18 MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS IN THE AFTERNOON. TIME (CDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........75 71 65 62 63 67 69 67 62 WEATHER COV..... SCH SCH SCH SCH SCH SCH WEATHER TYPE.... RW RW RW RW RW RW TEMP............59 61 62 64 65 65 66 66 65 RH..............54 51 48 44 42 39 37 36 37 20 FT WIND DIR..W W NW NW NW W W W NW 20 FT WIND SPD..17 17 16 16 16 16 17 17 16 20 FT WIND GUST.25 25 25 20 25 25 25 25 25 EYE LVL WND DIR.W W NW NW NW W W W NW EYE LVL WND SPD.12 12 11 11 11 11 12 12 11 EYE LVL WND GST.25 25 25 20 25 25 25 25 25 MIX HGT (KFT)...4.7 6.0 7.2 8.4 9.2 10 11 9.9 9.0 MIXNG WIND DIR..NW NW NW NW NW NW NW NW NW MIXNG WIND SPD..22 21 18 17 17 17 17 20 21 HAINES INDEX....3 3 4 4 4 4 4 4 4 .TONIGHT... SKY/WEATHER.........MOSTLY CLOUDY (50-60 PERCENT) THEN BECOMING PARTLY CLOUDY (20-30 PERCENT). MIN TEMPERATURE.....AROUND 42. MAX HUMIDITY........79 PERCENT. EYE LEVEL WINDS.....WEST WINDS 6 TO 15 MPH. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......8100 FT AGL DECREASING TO 300 FT AGL. MIXING WINDS........WEST 12 TO 21 MPH DECREASING TO 6 TO 8 MPH IN THE LATE EVENING AND OVERNIGHT. SMOKE DISPERSAL.....EXCELLENT (146300 KNOT-FT) DECREASING TO POOR (1800 KNOT-FT) IN THE LATE EVENING AND OVERNIGHT. WIND (20 FT)........WEST WINDS 6 TO 15 MPH. TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM SKY (%).........59 44 23 8 8 9 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............64 57 53 50 47 45 RH..............38 49 59 66 74 76 20 FT WIND......NW 15 NW 12 W 9 W 6 W 6 W 6 20 FT WIND GUST.20 15 10 EYE LEVEL WIND..NW 11 NW 9 W 6 W 4 W 4 W 4 EYE LEVEL WIND..20 15 10 5 5 5 MIX HGT (FT)....8100 2900 300 300 300 300 MIXNG WIND......NW 21 W 12 W 6 NW 8 W 7 W 7 HAINES INDEX....4 4 4 4 5 5 .FRIDAY... SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT). MAX TEMPERATURE.....AROUND 71. MIN HUMIDITY........36 PERCENT. EYE LEVEL WINDS.....SOUTH WINDS 6 TO 13 MPH. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......2100 FT AGL INCREASING TO 6300 FT AGL. MIXING WINDS........SOUTH 6 TO 15 MPH INCREASING TO 17 TO 23 MPH LATE IN THE AFTERNOON. SMOKE DISPERSAL.....FAIR (45600 KNOT-FT) INCREASING TO EXCELLENT (120000 KNOT-FT) IN THE AFTERNOON. WIND (20 FT)........SOUTH WINDS 6 TO 13 MPH. TIME (CDT) 7 AM 10 AM 1 PM 4 PM SKY (%).........9 25 40 52 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE TEMP............45 57 66 70 RH..............76 51 37 36 20 FT WIND......W 6 SW 8G10 SW 12G15 S 13G15 EYE LEVEL WIND..W 4G5 SW 6G10 SW 9G15 S 9G15 MIX HGT (FT)....300 3000 6300 5400 MIXNG WIND......W 6 W 8 SW 12 S 17 HAINES INDEX....5 5 5 5 $$ FORECASTER...BEERENDS REQUESTED BY...IOWA DNR TYPE OF REQUEST...PRESCRIBED .TAG 20110505.BIGCR.01/DMX