FNUS73 KDMX 080931 FWSDMX SPOT FORECAST FOR PLC UNIT...USFWS NATIONAL WEATHER SERVICE DES MOINES IA 431 AM CDT WED APR 8 2009 FORECAST IS BASED ON IGNITION TIME OF 1000 CDT ON APRIL 08. 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 APPROACHING FROM THE NORTHWEST WILL PROVIDE DRY WEATHER AND MOSTLY CLEAR SKIES TODAY. HIGH RELATIVE HUMIDITY EARLY THIS MORNING WILL DECREASE THROUGH THE DAY. LIGHT WEST NORTHWEST WINDS EARLY WILL TURN TO NORTHWEST AND INCREASE BY LATE MORNING TO 15 TO 20 MPH WITH GUSTS TO 20 TO 25 MPH. .TODAY... SKY/WEATHER.........SUNNY (15-25 PERCENT). TEMPERATURE.........41 AT IGNITION...MAX 54. RH..................62 PERCENT AT IGNITION...MIN 41 PERCENT. EYE LEVEL WINDS.....NORTHWEST WINDS 6 TO 14 MPH. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......2200 FT AGL INCREASING TO 6000 FT AGL. MIXING WINDS........NORTHWEST 8 TO 16 MPH INCREASING TO 20 TO 24 MPH IN THE LATE MORNING AND AFTERNOON. SMOKE DISPERSAL.....FAIR (21600 KNOT-FT) INCREASING TO EXCELLENT (114600 KNOT-FT). TIME (CDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........18 21 24 25 25 24 24 23 22 WEATHER COV..... WEATHER TYPE.... TEMP............41 44 47 49 51 52 53 52 51 RH..............62 55 51 48 44 43 41 41 42 EYE LVL WND DIR.NW NW NW NW NW NW NW NW NW EYE LVL WND SPD.10 10 11 11 11 11 10 10 9 EYE LVL WND GST.20 25 25 25 25 25 25 20 20 MIX HGT (KFT)...2.2 3.0 3.8 4.5 5.0 5.5 6.0 5.6 5.2 MIXNG WIND DIR..NW NW NW NW NW NW NW NW NW MIXNG WIND SPD..20 22 23 24 24 23 22 22 21 HAINES INDEX....4 4 4 4 4 4 4 4 4 .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT). TEMPERATURE.........MIN 29. RH..................MAX 78 PERCENT. EYE LEVEL WINDS.....NORTH WINDS 5 TO 10 MPH UNTIL EARLY MORNING BECOMING LIGHT. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......4800 FT AGL DECREASING TO 1800 FT AGL EARLY IN THE EVENING. MIXING WINDS........NORTHWEST 9 TO 18 MPH SHIFTING TO THE NORTHEAST 5 TO 6 MPH IN THE LATE EVENING AND OVERNIGHT. SMOKE DISPERSAL.....EXCELLENT (76800 KNOT-FT) DECREASING TO POOR (1300 KNOT-FT) IN THE LATE EVENING AND OVERNIGHT. TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM SKY (%).........22 24 26 28 30 34 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............50 43 40 37 34 33 RH..............44 55 62 67 72 72 EYE LEVEL WIND..NW 8 NW 5 NW 4 N 4 N 3 N 3 EYE LEVEL WIND..15 10 5 5 5 5 MIX HGT (FT)....4800 1800 300 300 300 300 MIXNG WIND......NW 18 NW 9 NW 5 NW 6 N 5 N 5 HAINES INDEX....4 4 4 4 4 4 .THURSDAY... SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT). TEMPERATURE.........MAX 49. RH..................MIN 49 PERCENT. EYE LEVEL WINDS.....EAST WINDS 5 TO 10 MPH. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......1700 FT AGL INCREASING TO 3100 FT AGL LATE IN THE MORNING. MIXING WINDS........EAST 7 TO 16 MPH INCREASING TO 18 TO 22 MPH LATE IN THE AFTERNOON. SMOKE DISPERSAL.....GOOD (54900 KNOT-FT). TIME (CDT) 7 AM 10 AM 1 PM 4 PM SKY (%).........36 50 64 71 WEATHER COV..... S CHC S CHC WEATHER TYPE....NONE NONE RNSHWR RNSHWR TEMP............32 38 45 48 RH..............75 73 53 49 EYE LEVEL WIND..NE 4G5 E 7G15 E 7G15 E 8G15 MIX HGT (FT)....300 1100 2900 3100 MIXNG WIND......NE 7 E 13 E 13 E 18 HAINES INDEX....5 5 5 4 $$ FORECASTER...LEE REQUESTED BY...JAMES KRIZMAN TYPE OF REQUEST...PRESCRIBED .TAG 20090408.PLCUN.01/DMX