FNUS74 KHUN 291234 FWSHUN SPOT FORECAST FOR KEY CAVE NORTH 3 4 5 11 OS...USFWS NATIONAL WEATHER SERVICE HUNTSVILLE AL 734 AM CDT THU SEP 29 2011 FORECAST IS BASED ON IGNITION TIME OF 1000 CDT ON SEPTEMBER 29. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... MOSTLY SUNNY AND DRY CONDITIONS CAN BE EXPECTED IN THE VICINITY OF THE PRESCRIBED BURN SITE ACROSS NORTHWEST ALABAMA TODAY. TEMPERATURES WILL WARM QUICKLY THROUGH THE MORNING HOURS...REACHING THE MID 80S BY MID AFTERNOON...WITH RELATIVE HUMIDITY VALUES FALLING INTO THE 35-40 PERCENT RANGE. LIGHT WINDS WILL INCREASE FROM THE WEST BY MID-MORNING...WITH 6-12 MPH WESTERLY FLOW IN THE TRANSPORT LAYER RESULTING IN GOOD SMOKE PLUME DISPERSION TO THE EAST. A STRONG BUT DRY COLD FRONT WILL PUSH ACROSS NORTHWEST ALABAMA BETWEEN 9 PM AND MIDNIGHT THIS EVENING...WITH WINDS SHIFTING TO THE NORTHWEST AND INCREASING TO 10-15 MPH. EVEN DRIER AND WINDIER CONDITIONS ARE EXPECTED ON FRIDAY...WITH RELATIVE HUMIDITY VALUES FALLING TO AROUND 30 PERCENT BY MID-AFTERNOON AND NORTH-NORTHWEST WINDS GUSTING TO 15-20 MPH. .TODAY... SKY/WEATHER.........SUNNY (20-30 PERCENT). MAX TEMPERATURE.....AROUND 85. MIN HUMIDITY........38 PERCENT. WIND (20 FT)........LIGHT WINDS BECOMING WEST 5 TO 7 MPH LATE IN THE MORNING. MIXING HEIGHT.......200-2000 FT AGL INCREASING TO 5900 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....SOUTH 1 TO 3 MPH SHIFTING TO THE WEST 6 TO 12 MPH IN THE LATE MORNING AND AFTERNOON. TIME (CDT) 10 AM NOON 2 PM 4 PM SKY (%).........PCLDY PCLDY PCLDY PCLDY WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE TEMP............70 79 84 85 RH..............68 49 40 38 20 FT WIND......W 3 W 6 W 7 W 6 MIX HGT (FT)....2000 2000 5900 5900 TRANSPORT WIND..NW 6 NW 6 NW 7 W 12 DISPERSION IDX..3 15 45 76 .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT). MIN TEMPERATURE.....AROUND 55. MAX HUMIDITY........87 PERCENT. WIND (20 FT)........NORTH WINDS 5 TO 7 MPH. MIXING HEIGHT.......5900 FT AGL DECREASING TO 200-400 FT AGL. TRANSPORT WINDS.....SOUTHWEST 5 TO 12 MPH INCREASING TO NORTH AROUND 25 MPH AFTER MIDNIGHT...THEN DECREASING TO AROUND 8 MPH EARLY IN THE MORNING. TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM SKY (%).........PCLDY PCLDY PCLDY PCLDY PCLDY PCLDY WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............79 70 64 61 59 57 RH..............48 66 79 84 86 87 20 FT WIND......W 5 W 5 NW 6 NW 7 N 7 N 6 MIX HGT (FT)....5900 400 200 200 300 300 TRANSPORT WIND..W 12 SW 5 SW 6 SW 6 N 25 N 8 DISPERSION IDX..76 2 2 5 23 4 .FRIDAY... SKY/WEATHER.........SUNNY (20-30 PERCENT). MAX TEMPERATURE.....AROUND 75. MIN HUMIDITY........31 PERCENT. WIND (20 FT)........NORTHWEST WINDS 6 TO 13 MPH. MIXING HEIGHT.......200-300 FT AGL INCREASING TO 4800-6200 FT AGL IN THE LATE MORNING AND AFTERNOON. TRANSPORT WINDS.....NORTHWEST 5 TO 8 MPH INCREASING TO 20 TO 22 MPH IN THE LATE MORNING AND AFTERNOON. TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM SKY (%).........PCLDY MCLEAR MCLEAR MCLEAR MCLEAR MCLEAR WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............55 58 66 71 74 75 RH..............85 74 53 38 32 31 20 FT WIND......N 6 N 7 N 9 NW 13 NW 13 NW 10 MIX HGT (FT)....300 200 4800 4800 6200 6000 TRANSPORT WIND..N 8 NW 5 N 20 N 20 NW 22 NW 21 DISPERSION IDX..4 3 13 59 73 93 $$ FORECASTER...DIXON/SCHULLER REQUESTED BY...JASON VEHRS TYPE OF REQUEST...PRESCRIBED .TAG 20110929.KEYCA.01/HUN