FNUS73 KDMX 101438 FWSDMX SPOT FORECAST FOR SHEETS...IA-DNR/USFWS NATIONAL WEATHER SERVICE DES MOINES IA 938 AM CDT TUE APR 10 2012 FORECAST IS BASED ON IGNITION TIME OF 1100 CDT ON APRIL 10. 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 RIDGE OF HIGH PRESSURE WILL REMAIN OVER THE REGION THROUGH WEDNESDAY MORNING PROVIDING COOL AND DRY WEATHER. IT WILL NOT BE AS WINDY THIS AFTERNOON... BUT IT WILL BE DRY WITH RELATIVE HUMIDITY FALLING BELOW 20 PERCENT. .TODAY... SKY/WEATHER.........SUNNY (0-10 PERCENT). PATCHY FROST EARLY IN THE MORNING. MAX TEMPERATURE.....AROUND 54. MIN HUMIDITY........23 PERCENT. EYE LEVEL WINDS.....NORTHWEST WINDS 6 TO 14 MPH INCREASING TO 16 TO 18 MPH LATE IN THE MORNING. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......1500 FT AGL INCREASING TO 6500 FT AGL. MIXING WINDS........NORTHWEST 6 TO 10 MPH INCREASING TO 26 TO 29 MPH. SMOKE DISPERSAL.....POOR TO GOOD (1300-40300 KNOT-FT) INCREASING TO EXCELLENT TO EXCELLENT (156200-159300 KNOT-FT). WIND (20 FT)........NORTHWEST WINDS 6 TO 14 MPH INCREASING TO 16 TO 18 MPH LATE IN THE MORNING. TIME (CDT) 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........6 6 6 6 7 7 7 8 WEATHER COV..... WEATHER TYPE.... TSTM COV........ TEMP............43 46 48 50 52 53 52 51 RH..............38 34 31 28 25 23 25 27 20 FT WIND DIR..NW NW NW NW NW NW NW NW 20 FT WIND SPD..14 16 17 18 18 18 18 17 20 FT WIND GUST.20 25 25 25 25 25 25 25 EYE LVL WND DIR.NW NW NW NW NW NW NW NW EYE LVL WND SPD.10 11 12 13 13 13 13 12 EYE LVL WND GST.20 25 25 25 25 25 25 25 MIX HGT (KFT)...4.6 5.2 5.8 6.0 6.3 6.5 6.3 6.2 MIXNG WIND DIR..NW NW NW NW NW NW NW NW MIXNG WIND SPD..24 24 24 25 26 28 29 29 HAINES INDEX....3 3 3 3 4 5 4 3 .TONIGHT... SKY/WEATHER.........MOSTLY CLEAR (0-10 PERCENT). AREAS OF FROST EARLY IN THE MORNING. MIN TEMPERATURE.....AROUND 27. MAX HUMIDITY........63 PERCENT. EYE LEVEL WINDS.....NORTH WINDS 7 TO 16 MPH DECREASING TO 6 TO 7 MPH AFTER MIDNIGHT. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......6000 FT AGL DECREASING TO 2400 FT AGL EARLY IN THE EVENING. MIXING WINDS........NORTHWEST 22 TO 28 MPH BECOMING NORTH 7 TO 15 MPH EARLY IN THE EVENING. SMOKE DISPERSAL.....GOOD TO EXCELLENT (30900-144600 KNOT-FT) DECREASING TO POOR TO POOR (3500-4400 KNOT-FT) IN THE LATE EVENING AND OVERNIGHT. WIND (20 FT)........NORTH WINDS 7 TO 16 MPH DECREASING TO 6 TO 7 MPH AFTER MIDNIGHT. TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM SKY (%).........8 7 5 4 4 3 WEATHER COV..... AREAS WEATHER TYPE....NONE NONE NONE NONE NONE FROST TSTM COV........ TEMP............49 43 39 36 33 31 RH..............30 38 46 52 56 61 20 FT WIND......NW 16 N 10 N 7 N 7 N 6 N 6 20 FT WIND GUST.25 15 EYE LEVEL WIND..NW 11 N 7 N 5 N 5 N 4 N 4 EYE LVL WND GST.25 15 MIX HGT (FT)....6000 2400 600 600 600 700 MIXNG WIND......NW 28 N 15 N 7 N 8 N 7 N 7 HAINES INDEX....3 3 3 3 3 3 .WEDNESDAY... SKY/WEATHER.........SUNNY (5-15 PERCENT). AREAS OF FROST EARLY IN THE MORNING. MAX TEMPERATURE.....AROUND 56. MIN HUMIDITY........30 PERCENT. EYE LEVEL WINDS.....NORTH WINDS 5 TO 8 MPH. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......2400 FT AGL INCREASING TO 6200 FT AGL. MIXING WINDS........NORTH 5 TO 13 MPH SHIFTING TO THE NORTHEAST 2 TO 3 MPH LATE IN THE AFTERNOON. SMOKE DISPERSAL.....POOR TO GOOD (3800-37900 KNOT-FT). WIND (20 FT)........NORTH WINDS 5 TO 8 MPH. TIME (CDT) 7 AM 10 AM 1 PM 4 PM SKY (%).........3 5 6 11 WEATHER COV.....AREAS WEATHER TYPE....FROST NONE NONE NONE TSTM COV........ TEMP............29 40 50 55 RH..............63 46 36 30 20 FT WIND......N 7 N 8G10 N 7 N 7 EYE LEVEL WIND..N 5 N 6G10 N 5 N 5 MIX HGT (FT)....600 3300 4400 6200 MIXNG WIND......N 7 N 13 N 8 N 3 HAINES INDEX....4 4 4 3 $$ FORECASTER...JOHNSON REQUESTED BY...ERIK ACKER TYPE OF REQUEST...PRESCRIBED .TAG 20120410.SHEET.01/DMX