FNUS73 KDMX 231106 FWSDMX SPOT FORECAST FOR NORTH BISON...USFWS NATIONAL WEATHER SERVICE DES MOINES IA 606 AM CDT THU APR 23 2009 FORECAST IS BASED ON IGNITION TIME OF 0900 CDT ON APRIL 23. 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 STRONG SOUTHERLY FLOW WILL BRING IN WARMER TEMPERATURES AND MORE MOISTURE. EXPECT SUSTAINED WIND SPEEDS OF 15 TO 20 MPH AND GUSTS TO 30 MPH. AN UPPER LEVEL SYSTEM WILL MOVE ACROSS SOUTHEASTERN PORTIONS OF CENTRAL IOWA AND ISOLATED THUNDERSTORMS ARE POSSIBLE LATE AFTERNOON AND THIS EVENING. .TODAY... SKY/WEATHER.........MOSTLY SUNNY (35-45 PERCENT). MAX TEMPERATURE.....AROUND 80. MIN HUMIDITY........35 PERCENT. EYE LEVEL WINDS.....SOUTHEAST WINDS 12 TO 17 MPH. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......2200 FT AGL INCREASING TO 5300 FT AGL. MIXING WINDS........SOUTHEAST 12 TO 21 MPH INCREASING TO SOUTH 24 TO 30 MPH IN THE LATE MORNING AND AFTERNOON. SMOKE DISPERSAL.....EXCELLENT (64700 KNOT-FT) INCREASING TO EXCELLENT (111800 KNOT-FT) IN THE AFTERNOON. TIME (CDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........17 16 20 27 31 34 39 42 47 59 WEATHER COV..... WEATHER TYPE.... TEMP............60 64 68 71 74 76 78 79 78 78 RH..............46 43 39 38 37 36 35 35 37 39 EYE LVL WND DIR.S S S S S S S S S SE EYE LVL WND SPD.11 13 13 14 14 14 13 13 12 10 EYE LVL WND GST.25 30 30 30 30 30 30 25 25 25 MIX HGT (KFT)...1.2 1.6 2.2 2.7 3.2 3.8 4.4 5.1 5.2 5.3 MIXNG WIND DIR..SE SE S S S S S S S S MIXNG WIND SPD..17 21 24 28 30 30 28 25 25 24 HAINES INDEX....3 3 3 4 4 4 5 5 4 4 .TONIGHT... SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT) THEN BECOMING PARTLY CLOUDY (30-40 PERCENT). MIN TEMPERATURE.....AROUND 59. MAX HUMIDITY........81 PERCENT. EYE LEVEL WINDS.....SOUTH WINDS 8 TO 12 MPH. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......5400 FT AGL DECREASING TO 300 FT AGL. MIXING WINDS........SOUTHEAST 15 TO 23 MPH SHIFTING TO THE SOUTH 7 TO 12 MPH IN THE LATE EVENING AND OVERNIGHT. SMOKE DISPERSAL.....EXCELLENT (107500 KNOT-FT) DECREASING TO POOR (7800 KNOT-FT) IN THE LATE EVENING AND OVERNIGHT. TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM SKY (%).........63 43 31 18 21 21 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............77 71 68 66 63 62 RH..............40 57 63 68 75 78 EYE LEVEL WIND..SE 10 SE 9 SE 7 S 7 S 7 S 7 EYE LEVEL WIND..20 20 15 15 15 15 MIX HGT (FT)....5400 2300 600 300 300 300 MIXNG WIND......S 23 SE 15 SE 9 SE 7 SE 7 S 7 HAINES INDEX....3 3 3 4 5 5 .FRIDAY... SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT). MAX TEMPERATURE.....AROUND 83. MIN HUMIDITY........46 PERCENT. EYE LEVEL WINDS.....SOUTH WINDS 9 TO 18 MPH INCREASING TO 17 TO 19 MPH EARLY IN THE AFTERNOON. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......2000 FT AGL INCREASING TO 3900 FT AGL LATE IN THE MORNING. MIXING WINDS........SOUTH 10 TO 16 MPH INCREASING TO 22 TO 31 MPH EARLY IN THE MORNING. SMOKE DISPERSAL.....EXCELLENT (60700 KNOT-FT) INCREASING TO EXCELLENT (101900 KNOT-FT) IN THE AFTERNOON. TIME (CDT) 7 AM 10 AM 1 PM 4 PM SKY (%).........20 26 32 36 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE TEMP............61 71 79 82 RH..............78 59 49 46 EYE LEVEL WIND..S 7G15 S 13G30 S 14G30 S 15G30 MIX HGT (FT)....300 1500 3100 3900 MIXNG WIND......S 10 SW 26 S 26 S 29 HAINES INDEX....4 4 5 5 $$ FORECASTER...BOKSA REQUESTED BY...JAMES KRIZMAN TYPE OF REQUEST...PRESCRIBED .TAG 20090423.NORTH.01/DMX