FNUS73 KDMX 171441 FWSDMX SPOT FORECAST FOR PERKINS MARSH...IOWA DNR-USFWS NATIONAL WEATHER SERVICE DES MOINES IA 941 AM CDT TUE APR 17 2012 FORECAST IS BASED ON IGNITION TIME OF 1330 CDT ON APRIL 17. 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 WARM FRONT FROM SOUTH DAKOTA ACROSS SOUTHWEST IOWA THIS MORNING WILL LIFT NORTHWARD THROUGHOUT THE DAY REACHING SOUTHERN MINNESOTA BY EARLY THIS EVENING. THIS WILL GRADUALLY INCREASING WARMTH AND HUMIDITY...ALSO LEADING TO BETTER CHANCES FOR SHOWERS AND A FEW THUNDERSTORMS BY LATE AFTERNOON. .TODAY... SKY/WEATHER.........PARTLY SUNNY (60-70 PERCENT). ISOLATED SPRINKLES EARLY IN THE AFTERNOON. SCATTERED SHOWERS AND THUNDERSTORMS LATE IN THE AFTERNOON. MAX TEMPERATURE.....AROUND 67. MIN HUMIDITY........41 PERCENT. EYE LEVEL WINDS.....SOUTH WINDS 6 TO 15 MPH INCREASING TO 16 TO 20 MPH IN THE AFTERNOON. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......1600 FT AGL INCREASING TO 6900 FT AGL. MIXING WINDS........SOUTH 2 TO 9 MPH INCREASING TO 23 TO 26 MPH. SMOKE DISPERSAL.....POOR TO GOOD (500-55300 KNOT-FT) INCREASING TO EXCELLENT TO EXCELLENT (130400-161300 KNOT-FT). WIND (20 FT)........SOUTH WINDS 6 TO 15 MPH INCREASING TO 16 TO 20 MPH IN THE AFTERNOON. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS LATE IN THE AFTERNOON. TIME (CDT) 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........58 62 69 72 73 74 WEATHER COV.....ISO ISO ISO SCT SCT SCT WEATHER TYPE....RW RW RW RW RW RW TSTM COV........ SCT SCT SCT TEMP............60 62 65 66 66 65 RH..............47 46 41 42 43 46 20 FT WIND DIR..S S S S S S 20 FT WIND SPD..16 17 20 20 18 17 20 FT WIND GUST.25 25 30 30 25 25 EYE LVL WND DIR.S S S S S S EYE LVL WND SPD.11 12 14 14 13 12 EYE LVL WND GST.25 25 30 30 25 25 MIX HGT (KFT)...5.4 5.8 6.1 6.5 6.7 6.9 MIXNG WIND DIR..S S S S S S MIXNG WIND SPD..16 18 21 23 25 26 HAINES INDEX....4 4 3 3 3 4 .TONIGHT... SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT) THEN BECOMING PARTLY CLOUDY (40-50 PERCENT). CHANCE OF SHOWERS AND THUNDERSTORMS IN THE EVENING...THEN SHOWERS AND THUNDERSTORMS LIKELY AFTER MIDNIGHT. MIN TEMPERATURE.....AROUND 51. MAX HUMIDITY........80 PERCENT. EYE LEVEL WINDS.....SOUTHWEST WINDS 12 TO 17 MPH. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......7000 FT AGL DECREASING TO 800 FT AGL. MIXING WINDS........SOUTHWEST 20 TO 28 MPH. SMOKE DISPERSAL.....GOOD TO EXCELLENT (59900-169100 KNOT-FT) DECREASING TO POOR TO FAIR (9100-15400 KNOT-FT) IN THE LATE EVENING AND OVERNIGHT. WIND (20 FT)........SOUTHWEST WINDS 12 TO 17 MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS. TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM SKY (%).........75 79 84 88 74 56 WEATHER COV.....CHANCE CHANCE CHANCE LIKELY LIKELY LIKELY WEATHER TYPE....RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR TSTM COV........CHANCE CHANCE CHANCE LIKELY LIKELY LIKELY TEMP............67 63 60 57 55 54 RH..............43 52 58 67 72 77 20 FT WIND......S 16 S 15 S 16 S 17 S 17 SW 14 20 FT WIND GUST.25 20 25 25 25 20 EYE LEVEL WIND..S 11 S 11 S 11 S 12 S 12 SW 10 EYE LVL WND GST.25 20 25 25 25 20 MIX HGT (FT)....7000 2900 800 600 600 500 MIXNG WIND......S 28 S 24 S 22 S 22 SW 23 SW 22 HAINES INDEX....4 4 4 4 4 4 .WEDNESDAY... SKY/WEATHER.........MOSTLY SUNNY (35-45 PERCENT). MAX TEMPERATURE.....AROUND 71. MIN HUMIDITY........36 PERCENT. EYE LEVEL WINDS.....NORTH WINDS 8 TO 10 MPH. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......2100 FT AGL INCREASING TO 7400 FT AGL. MIXING WINDS........NORTH 8 TO 17 MPH. SMOKE DISPERSAL.....POOR TO GOOD (8000-59600 KNOT-FT). WIND (20 FT)........NORTH WINDS 8 TO 10 MPH. TIME (CDT) 7 AM 10 AM 1 PM 4 PM SKY (%).........43 39 36 39 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE TSTM COV........ TEMP............53 61 67 70 RH..............80 56 42 36 20 FT WIND......W 10G15 NW 10G15 NW 10G15 N 9G10 EYE LEVEL WIND..W 7G15 NW 7G15 NW 7G15 N 6G10 MIX HGT (FT)....500 2900 5700 7400 MIXNG WIND......SW 17 NW 14 NW 12 NW 9 HAINES INDEX....4 4 3 3 $$ FORECASTER...SMALL REQUESTED BY...STEVE WOODRUFF TYPE OF REQUEST...PRESCRIBED .TAG 20120417.PERKI.01/DMX