FNUS73 KDMX 221255 FWSDMX SPOT FORECAST FOR TOMAHAWK HAMMERSTROM...IDNR NATIONAL WEATHER SERVICE DES MOINES IA 755 AM CDT WED APR 22 2009 FORECAST IS BASED ON IGNITION TIME OF 1000 CDT ON APRIL 22. 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 WILL MOVE ACROSS THE STATE TODAY GRADUALLY SWITCHING WINDS TO THE SOUTH BY THURSDAY. WIND SPEEDS TODAY WILL BE LIGHT TODAY WITH SPEEDS AT OR BELOW 10 MPH. THURSDAY WINDS WILL INCREASE FROM THE SOUTH AS WARMER AIR AND MOISTURE SURGES INTO IOWA. .TODAY... SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT). MAX TEMPERATURE.....AROUND 74. MIN HUMIDITY........24 PERCENT. EYE LEVEL WINDS.....SOUTHWEST WINDS 5 TO 6 MPH. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......900 FT AGL INCREASING TO 7800 FT AGL. MIXING WINDS........SOUTHWEST 5 TO 10 MPH. SMOKE DISPERSAL.....GOOD (56400 KNOT-FT). TIME (CDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........41 41 39 38 37 36 35 30 20 WEATHER COV..... WEATHER TYPE.... TEMP............53 56 60 63 67 70 74 73 72 RH..............46 42 37 34 29 27 24 25 27 EYE LVL WND DIR.N N N N NW W W SW SW EYE LVL WND SPD.5 5 4 4 4 5 5 5 5 EYE LVL WND GST.10 10 10 10 10 10 10 10 10 MIX HGT (KFT)...0.9 2.4 4.0 5.6 6.3 7.0 7.8 6.9 6.0 MIXNG WIND DIR..NW NW W W W SW SW SW SW MIXNG WIND SPD..8 7 6 5 5 5 6 8 10 HAINES INDEX....5 5 5 5 5 5 5 5 5 .TONIGHT... SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT). MIN TEMPERATURE.....AROUND 55. MAX HUMIDITY........69 PERCENT. EYE LEVEL WINDS.....SOUTH WINDS 7 TO 11 MPH. 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........SOUTH 10 TO 15 MPH. SMOKE DISPERSAL.....GOOD (56700 KNOT-FT) DECREASING TO POOR (3300 KNOT-FT) IN THE LATE EVENING AND OVERNIGHT. TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM SKY (%).........16 19 23 26 28 31 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............71 64 61 59 57 56 RH..............28 38 46 51 57 64 EYE LEVEL WIND..S 6 S 6 SE 8 S 9 S 8 S 7 EYE LEVEL WIND..15 15 15 20 15 15 MIX HGT (FT)....5200 1900 300 300 300 300 MIXNG WIND......SW 13 S 12 S 12 S 14 S 15 S 15 HAINES INDEX....5 5 5 4 4 4 .THURSDAY... SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT). MAX TEMPERATURE.....AROUND 84. MIN HUMIDITY........35 PERCENT. EYE LEVEL WINDS.....SOUTH WINDS 10 TO 19 MPH. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......2200 FT AGL INCREASING TO 4100 FT AGL LATE IN THE MORNING...THEN INCREASING TO 7500 FT AGL EARLY IN THE AFTERNOON INCREASING TO 9200 FT AGL LATE IN THE AFTERNOON DECREASING TO 6400 FT AGL. MIXING WINDS........SOUTH 15 TO 22 MPH INCREASING TO 25 TO 28 MPH IN THE LATE MORNING AND AFTERNOON. SMOKE DISPERSAL.....FAIR (17800 KNOT-FT) INCREASING TO EXCELLENT (212000 KNOT-FT). TIME (CDT) 7 AM 10 AM 1 PM 4 PM SKY (%).........33 27 20 20 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE TEMP............55 68 78 83 RH..............69 51 40 36 EYE LEVEL WIND..S 8G15 SW 13G30 S 14G30 S 15G30 MIX HGT (FT)....300 1300 4100 9200 MIXNG WIND......S 15 S 25 S 28 S 26 HAINES INDEX....4 4 5 4 $$ FORECASTER...BOKSA REQUESTED BY...JOHN MCCLEARY TYPE OF REQUEST...PRESCRIBED .TAG 20090422.TOMAH.01/DMX