FNUS73 KDMX 020043 FWSDMX SPOT FORECAST FOR TOWHEAD LAKE...IA DNR NATIONAL WEATHER SERVICE DES MOINES IA 743 PM CDT SUN MAY 1 2011 FORECAST IS BASED ON IGNITION TIME OF 1000 CDT ON MAY 02. 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 ACROSS THE AREA WILL PROVIDE THE REGION WITH GENERALLY LESS WIND BY MONDAY. HOWEVER...RELATIVE HUMIDITY WILL REMAIN RATHER LOW IN THE MID 20S. WINDS MIXING TO 18 TO 25 MPH DURING THE LATE MORNING HOURS CAN BE EXPECTED. THE DRY WEATHER WITH NO WETTING RAINFALL WILL PERSIST THROUGH MIDWEEK THOUGH STRONGER SOUTH WINDS ARE ANTICIPATED BY WEDNESDAY. .TODAY... SKY/WEATHER.........SUNNY (10-20 PERCENT). MAX TEMPERATURE.....AROUND 54. MIN HUMIDITY........22 PERCENT. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......6000 FT AGL INCREASING TO 6500 FT AGL IN THE AFTERNOON. MIXING WINDS........WEST 26 TO 33 MPH. SMOKE DISPERSAL.....EXCELLENT (156100 KNOT-FT). WIND (20 FT)........WINDY. WEST WINDS 21 TO 29 MPH WITH GUSTS TO AROUND 40 MPH SHIFTING TO THE NORTHWEST 23 TO 31 MPH IN THE LATE MORNING AND EARLY AFTERNOON...THEN SHIFTING TO THE WEST 17 TO 21 MPH LATE IN THE AFTERNOON. TIME (CDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........12 3 2 1 2 3 3 12 14 17 21 24 WEATHER COV..... WEATHER TYPE.... TEMP............40 41 43 46 48 49 51 52 53 53 53 52 RH..............55 52 49 43 39 37 34 32 29 28 28 28 20 FT WIND DIR..W W W W W W W W NW W W W 20 FT WIND SPD..21 22 23 29 31 30 26 25 23 21 20 17 20 FT WIND GUST.35 35 35 40 40 40 35 35 30 30 30 25 MIX HGT (KFT)...4.2 4.2 4.3 4.3 4.9 5.4 6.0 6.2 6.3 6.5 6.1 5.6 MIXNG WIND DIR..W W W W W W W W W W W W MIXNG WIND SPD..33 31 29 28 26 26 26 26 28 28 29 30 HAINES INDEX....4 4 4 4 4 5 5 5 5 5 5 5 .TONIGHT... SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT). AREAS OF FROST EARLY IN THE MORNING. MIN TEMPERATURE.....AROUND 32. MAX HUMIDITY........66 PERCENT. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......5200 FT AGL DECREASING TO 1900 FT AGL EARLY IN THE EVENING. MIXING WINDS........WEST 23 TO 29 MPH BECOMING NORTHWEST AROUND 6 MPH. SMOKE DISPERSAL.....EXCELLENT (130100 KNOT-FT) DECREASING TO POOR (3600 KNOT-FT) IN THE LATE EVENING AND OVERNIGHT. WIND (20 FT)........NORTHWEST WINDS 7 TO 16 MPH. TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM SKY (%).........26 23 20 17 18 20 WEATHER COV..... AREAS WEATHER TYPE....NONE NONE NONE NONE NONE FROST TEMP............50 45 41 39 36 35 RH..............29 40 48 54 59 61 20 FT WIND......NW 16 W 12 NW 8 NW 8 NW 7 NW 7 20 FT WIND GUST.25 15 10 10 MIX HGT (FT)....5200 1900 300 300 300 500 MIXNG WIND......W 29 NW 16 NW 9 NW 10 NW 9 NW 8 HAINES INDEX....5 5 5 5 5 5 .MONDAY... SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT). MAX TEMPERATURE.....AROUND 55. MIN HUMIDITY........33 PERCENT. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......1900 FT AGL INCREASING TO 7900 FT AGL. MIXING WINDS........NORTHWEST 7 TO 12 MPH INCREASING TO 18 TO 24 MPH EARLY IN THE MORNING. SMOKE DISPERSAL.....FAIR (46500 KNOT-FT) INCREASING TO EXCELLENT (134600 KNOT-FT) IN THE LATE MORNING AND AFTERNOON. WIND (20 FT)........NORTHWEST WINDS 8 TO 16 MPH. TIME (CDT) 7 AM 10 AM 1 PM 4 PM SKY (%).........21 27 41 39 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE TEMP............34 44 51 54 RH..............69 47 34 32 20 FT WIND......NW 8G10 NW 14G20 NW 16G25 NW 15G20 MIX HGT (FT)....900 4000 6200 7900 MIXNG WIND......NW 7 NW 23 NW 22 NW 20 HAINES INDEX....4 4 4 4 $$ FORECASTER...VACHALEK REQUESTED BY...PETE HILDRETH TYPE OF REQUEST...PRESCRIBED .TAG 20110502.TOWHE.01/DMX