FNUS73 KDMX 072230 FWSDMX SPOT FORECAST FOR PLC UNIT...USFWS NATIONAL WEATHER SERVICE DES MOINES IA 530 PM CDT TUE APR 7 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... A WEAK TROUGH/WIND SHIFT LINE WILL MOVE EAST THROUGH IOWA OVERNIGHT. EXPECT AN INCREASING NW WIND WEDNESDAY MORNING. THERE MAY BE A BRIEF PERIOD OF SCATTERED TO BROKEN CLOUDS AROUND TWO THOUSAND FEET THROUGH MID WEDNESDAY MORNING. .REST OF TONIGHT... SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT). MIN TEMPERATURE.....AROUND 31. MAX HUMIDITY........75 PERCENT. EYE LEVEL WINDS.....NORTHWEST WINDS 6 TO 7 MPH EARLY IN THE EVENING BECOMING LIGHT...THEN BECOMING WEST 6 TO 7 MPH AFTER MIDNIGHT. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......4500 FT AGL DECREASING TO 1500 FT AGL EARLY IN THE EVENING. MIXING WINDS........WEST 5 TO 13 MPH DECREASING TO 1 TO 8 MPH IN THE LATE EVENING AND OVERNIGHT. SMOKE DISPERSAL.....GOOD (50800 KNOT-FT) DECREASING TO POOR (3800 KNOT-FT) IN THE LATE EVENING AND OVERNIGHT. TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM 6 AM SKY (%).........9 9 19 33 36 26 32 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE NONE TEMP............48 44 40 38 36 34 33 RH..............39 39 46 50 56 66 72 EYE LEVEL WIND..W 6 NW 5 N 2 NW 2 W 3 W 5 NW 6 EYE LEVEL WIND..10 5 5 10 10 MIX HGT (FT)....4500 2700 300 300 300 300 600 MIXNG WIND......W 13 W 8 W 1 W 2 W 5 W 6 W 8 HAINES INDEX....5 5 4 3 3 4 4 .WEDNESDAY... SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT). MAX TEMPERATURE.....AROUND 53. MIN HUMIDITY........46 PERCENT. EYE LEVEL WINDS.....NORTHWEST WINDS 8 TO 12 MPH. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......2600 FT AGL INCREASING TO 4500 FT AGL IN THE AFTERNOON. MIXING WINDS........NORTHWEST 9 TO 18 MPH INCREASING TO 18 TO 21 MPH IN THE LATE MORNING AND AFTERNOON. SMOKE DISPERSAL.....EXCELLENT (72300 KNOT-FT) INCREASING TO EXCELLENT (81400 KNOT-FT) LATE IN THE AFTERNOON. TIME (CDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........35 37 36 34 32 31 30 30 29 28 27 26 WEATHER COV..... WEATHER TYPE.... TEMP............33 35 38 41 44 46 48 50 51 52 51 50 RH..............75 72 70 65 60 58 56 52 48 46 48 50 EYE LVL WND DIR.NW NW NW NW NW NW NW NW NW NW NW NW EYE LVL WND SPD.6 8 9 10 10 9 9 9 10 10 9 8 EYE LVL WND GST.15 15 15 20 20 20 15 20 20 20 15 15 MIX HGT (KFT)...0.7 1.1 1.5 1.8 2.2 2.6 3.0 3.5 4.0 4.5 4.3 4.1 MIXNG WIND DIR..W NW NW NW NW NW NW NW NW NW NW NW MIXNG WIND SPD..9 13 16 18 20 20 20 21 21 21 20 18 HAINES INDEX....4 4 4 4 4 4 4 4 5 5 5 5 $$ FORECASTER...KINNEY REQUESTED BY...JAMES KRIZMAN TYPE OF REQUEST...PRESCRIBED .TAG 20090408.PLCUN.01/DMX