FNUS73 KDMX 070923 FWSDMX SPOT FORECAST FOR NEW SHARON FIRE...MAHASKA CO NATIONAL WEATHER SERVICE DES MOINES IA 423 AM CDT SAT JUL 7 2012 FORECAST IS BASED ON IGNITION TIME OF 0500 CDT ON JULY 07. 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. ...EXCESSIVE HEAT WARNING IN EFFECT UNTIL 7 PM CDT THIS EVENING... .DISCUSSION... COOLER CONDITIONS WILL MOVE SOUTH TODAY...THOUGH SOUTHERN IOWA REMAINS HOT WITH HIGHS IN THE MID TO UPPER 90S. ALONG WITH THAT...LOWER RELATIVELY HUMIDITY WILL RESULT IN THE EASIER SPREAD AND IGNITION OF GRASS FIRES. THOUGH WINDS WILL REMAIN LIGHT MOS OF THE DAY...CAUTION SHOULD BE TAKEN FOR ANY PRESCRIBED BURNS DUE TO THE HEAT AND LOWER HUMIDITY LATE THIS AFTERNOON. SOME SPOTTY WETTING RAINS MAY OCCUR SOUTH THIS AFTERNOON AND EVENING. OTHERWISE THE BALANCE OF NEXT WEEK WILL BE COOLER AND GENERALLY DRY. .TODAY... SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT). A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. MAX TEMPERATURE.....AROUND 98. MIN HUMIDITY........45 PERCENT. EYE LEVEL WINDS.....SOUTH WINDS BECOMING NORTH WINDS 5 TO 8 MPH. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......1000 FT AGL INCREASING TO 3800 FT AGL LATE IN THE MORNING...THEN INCREASING TO 6600 FT AGL LATE IN THE MORNING INCREASING TO 9400 FT AGL EARLY IN THE AFTERNOON DECREASING TO 7100 FT AGL. MIXING WINDS........NORTH 1 TO 8 MPH. SMOKE DISPERSAL.....POOR TO GOOD (300-36100 KNOT-FT). WIND (20 FT)........NORTH WINDS 5 TO 8 MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS IN THE AFTERNOON. TIME (CDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........23 27 36 40 41 42 43 48 59 64 63 62 WEATHER COV..... SCH SCH SCH SCH SCH SCH WEATHER TYPE.... RW RW RW RW RW RW TSTM COV........ SCH SCH SCH SCH SCH SCH TEMP............78 81 83 86 90 93 95 96 97 98 97 96 RH..............74 69 67 63 56 51 48 46 46 45 46 46 20 FT WIND DIR..SW W W W W NW NW NW NW N N N 20 FT WIND SPD..5 5 5 5 5 5 5 5 5 6 7 8 20 FT WIND GUST. 10 10 10 EYE LVL WND DIR.SW W W W W NW NW NW NW N N N EYE LVL WND SPD.4 4 4 4 4 4 4 4 4 4 5 6 EYE LVL WND GST. 10 10 10 MIX HGT (KFT)...0.3 0.5 0.7 1.0 3.8 6.6 9.4 9.2 9.1 8.9 7.1 5.3 MIXNG WIND DIR..SW SW W NW NW NW NW N N N N N MIXNG WIND SPD..1 2 5 6 6 5 3 3 3 5 6 8 HAINES INDEX....5 5 5 5 5 5 5 5 5 5 5 5 .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT) THEN BECOMING MOSTLY CLOUDY (50-60 PERCENT) THEN BECOMING PARTLY CLOUDY (45-55 PERCENT). SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS. MIN TEMPERATURE.....AROUND 71. MAX HUMIDITY........79 PERCENT. EYE LEVEL WINDS.....NORTHEAST WINDS AROUND 9 MPH. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......3500 FT AGL DECREASING TO 1300 FT AGL EARLY IN THE EVENING. MIXING WINDS........NORTHEAST 10 TO 18 MPH INCREASING TO 17 TO 23 MPH IN THE LATE EVENING AND OVERNIGHT. SMOKE DISPERSAL.....POOR TO GOOD (4800-31300 KNOT-FT). WIND (20 FT)........NORTHEAST WINDS AROUND 9 MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS. TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM SKY (%).........50 51 54 56 53 50 WEATHER COV.....S CHC S CHC S CHC S CHC S CHC S CHC WEATHER TYPE....RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR TSTM COV........S CHC S CHC S CHC S CHC S CHC S CHC TEMP............93 85 79 76 73 72 RH..............51 65 77 79 79 76 20 FT WIND......N 9 N 9 NE 9 NE 9 NE 9 NE 9 20 FT WIND GUST.10 10 10 10 10 10 EYE LEVEL WIND..N 6 N 6 NE 6 NE 6 NE 6 NE 6 EYE LVL WND GST.10 10 10 10 10 10 MIX HGT (FT)....3500 1300 300 300 800 1000 MIXNG WIND......NE 10 NE 18 NE 23 NE 22 NE 20 NE 17 HAINES INDEX....5 5 5 5 5 5 .SUNDAY... SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT). MAX TEMPERATURE.....AROUND 86. MIN HUMIDITY........42 PERCENT. EYE LEVEL WINDS.....NORTHEAST WINDS 9 TO 12 MPH. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......3000 FT AGL INCREASING TO 6000 FT AGL. MIXING WINDS........NORTHEAST 17 TO 24 MPH. SMOKE DISPERSAL.....FAIR TO EXCELLENT (16000-86200 KNOT-FT) INCREASING TO EXCELLENT TO EXCELLENT (90500-93100 KNOT-FT) IN THE AFTERNOON. WIND (20 FT)........NORTHEAST WINDS 9 TO 12 MPH. TIME (CDT) 7 AM 10 AM 1 PM 4 PM SKY (%).........48 49 49 45 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE TSTM COV........ TEMP............74 78 84 86 RH..............69 56 48 42 20 FT WIND......NE 9G10 NE 10G15 NE 12G15 NE 10G15 EYE LEVEL WIND..NE 6G10 NE 7G15 NE 9G15 NE 7G15 MIX HGT (FT)....1100 3000 5200 6000 MIXNG WIND......NE 17 NE 24 NE 21 NE 17 HAINES INDEX....4 3 4 4 $$ FORECASTER...VACHALEK REQUESTED BY...JAMEY A ROBINSON TYPE OF REQUEST...PRESCRIBED .TAG 20120707.NEWSH.01/DMX REV