FNUS73 KDMX 121338 FWSDMX SPOT FORECAST FOR BAYS BRANCH...IDNR NATIONAL WEATHER SERVICE DES MOINES IA 838 AM CDT TUE APR 12 2011 FORECAST IS BASED ON IGNITION TIME OF 1330 CDT ON APRIL 12. 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 OVER IOWA WILL SLOWLY SHIFT EASTWARD INTO ILLINOIS DURING THE DAY AND WINDS ARE EXPECTED TO BECOME SOUTHERLY BY AROUND MIDDAY AND INCREASE DURING THE AFTERNOON HOURS. THE RELATIVE HUMIDITY WILL FALL FAIRLY QUICKLY THROUGH THE REMAINDER OF THE MORNING AND INTO THE AFTERNOON AS THE TEMPERATURES RISE TO AROUND 70. .TODAY... SKY/WEATHER.........SUNNY (10-20 PERCENT). TEMPERATURE.........66 AT IGNITION...MAX 71. RH..................36 PERCENT AT IGNITION...MIN 30 PERCENT. HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......1800 FT AGL INCREASING TO 5500 FT AGL. MIXING WINDS........SOUTH 5 TO 14 MPH INCREASING TO AROUND 15 MPH LATE IN THE AFTERNOON. SMOKE DISPERSAL.....FAIR (49900 KNOT-FT) INCREASING TO GOOD (64100 KNOT-FT) LATE IN THE AFTERNOON. WIND (20 FT)........WINDS SOUTH AT 8 MPH AT IGNITION...OTHERWISE LIGHT WINDS BECOMING SOUTH 5 TO 8 MPH EARLY IN THE MORNING. TIME (CDT) 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........14 15 17 19 21 23 WEATHER COV..... WEATHER TYPE.... TEMP............63 66 68 69 69 68 RH..............36 33 31 30 30 31 20 FT WIND DIR..SW S S S S S 20 FT WIND SPD..8 8 8 8 8 8 20 FT WIND GUST.10 10 10 10 10 10 MIX HGT (KFT)...4.7 5.0 5.2 5.5 5.2 4.9 MIXNG WIND DIR..S S S S S S MIXNG WIND SPD..8 9 12 13 14 15 HAINES INDEX....6 6 5 5 5 5 .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT) THEN BECOMING MOSTLY CLOUDY (50-60 PERCENT). TEMPERATURE.........MIN 46. RH..................MAX 77 PERCENT. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......4700 FT AGL DECREASING TO 2100 FT AGL EARLY IN THE EVENING. MIXING WINDS........SOUTH 6 TO 15 MPH. SMOKE DISPERSAL.....GOOD (60600 KNOT-FT) DECREASING TO POOR (6500 KNOT-FT) IN THE LATE EVENING AND OVERNIGHT. WIND (20 FT)........SOUTH WINDS 7 TO 8 MPH. TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM SKY (%).........24 30 39 46 50 56 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............67 60 57 54 51 50 RH..............32 42 51 59 66 68 20 FT WIND......S 8 S 8 S 7 S 7 S 8 S 7 20 FT WIND GUST.10 10 10 MIX HGT (FT)....4700 2100 600 300 300 300 MIXNG WIND......S 15 S 12 S 8 S 8 S 7 S 7 HAINES INDEX....5 5 5 5 5 5 $$ FORECASTER...PODRAZIK REQUESTED BY...MICHAEL STRAUSER TYPE OF REQUEST...PRESCRIBED .TAG 20110412.BAYSB.01/DMX