FNUS72 KFFC 211320 FWSFFC SPOT FORECAST FOR 24N...USFWS NATIONAL WEATHER SERVICE PEACHTREE CITY GA 920 AM EDT THU MAR 21 2013 FORECAST IS BASED ON IGNITION TIME OF 1030 EDT ON MARCH 21. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...A SECONDARY FRONT HAS MOVED THROUGH THE AREA AND IN ITS WAKE...ADDITIONAL DRY AIR WILL MOVE INTO THE AREA RESULTING IN WIDESPREAD RELATIVE HUMIDITY VALUES IN THE LOWER TO MID 20S. IN ADDITION...WINDS WILL INCREASE THROUGH MID MORNING WITH VALUES OF 15MPH SUSTAINED...ESPECIALLY OVER THE HIGHER ELEVATIONS OF THE MOUNTAINS AND ALONG WEST FACING SLOPES. THIS COMBINATION WILL LEAD TO DANGEROUS FIRE WEATHER CONDITIONS FOR MUCH OF THE AREA. THE ATMOSPHERE AT THE MID LEVELS WILL MOISTEN QUICKLY THIS EVENING WITH A WINTRY MIX OF PRECIPITATION POSSIBLE THROUGH FRIDAY MORNING. SITE SPECIFIC DISCUSSION... ...HIGH FIRE DANGER STATEMENT FOR TODAY INTO THIS EVENING... RH VALUES WILL BE LOW TODAY WITH A DRIER AIRMASS MOVING INTO THE STATE. WITH A SLIGHT NORTH TO NORTHWEST ASPECT...DECIDED TO INCREASE THE RH VALUES SLIGHTLY. CURRENT HIGH CLOUDS OVER THE AREA NOW ARE EXPECTED TO MOVE OUT OF THE AREA BEFORE MORE CLOUDS MOVE IN LATE THIS AFTERNOON. THE CHANCE FOR FOG DEVELOPMENT IS SLIGHT AT BEST WITH THE CLOUDS MOVING INTO THE STATE OVERNIGHT. .TODAY... SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT). MAX TEMPERATURE.....AROUND 55. MIN HUMIDITY........21 PERCENT. WIND (20 FT)........LIGHT WINDS BECOMING NORTHWEST 5 TO 13 MPH WITH GUSTS TO AROUND 25 MPH. MIXING HEIGHT.......4900-5500 FT AGL. TRANSPORT WINDS.....NORTHWEST 10 TO 16 MPH INCREASING TO 17 TO 24 MPH IN THE LATE MORNING AND AFTERNOON. DISPERSION INDEX....19 LATE IN THE MORNING...THEN INCREASING TO 71 IN THE AFTERNOON. LVORI...............2. TIME (EDT) 10 AM NOON 2 PM 4 PM SKY (%).........36 37 46 42 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE TEMP............41 47 52 55 RH..............42 31 23 21 20 FT WIND......NW 10 NW 13 NW 13 NW 13 20 FT WIND GUST.20 25 20 20 DISPERSION IDX..19 72 73 68 LVORI...........2 1 1 1 .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT) THEN BECOMING MOSTLY CLOUDY (65-75 PERCENT). SLIGHT CHANCE OF LIGHT SLEET AFTER MIDNIGHT. SLIGHT CHANCE OF SNOW EARLY IN THE MORNING. MIN TEMPERATURE.....AROUND 32. MAX HUMIDITY........84 PERCENT. WIND (20 FT)........NORTHWEST WINDS 7 TO 9 MPH EARLY IN THE EVENING BECOMING LIGHT. MIXING HEIGHT.......5500 FT AGL DECREASING TO 200-600 FT AGL EARLY IN THE EVENING. TRANSPORT WINDS.....NORTH 5 TO 14 MPH. DISPERSION INDEX....57 DECREASING TO 4. LVORI...............2. TIME (EDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM SKY (%).........38 60 75 81 83 88 WEATHER COV..... S CHC S CHC WEATHER TYPE....NONE NONE NONE NONE SLEET SNOW TEMP............54 48 42 38 36 35 RH..............21 30 42 56 68 73 20 FT WIND......NW 9 NW 3 NW 3 NW 2 N 2 N 2 20 FT WIND GUST.15 5 5 5 5 5 DISPERSION IDX..57 6 5 2 2 3 LVORI...........1 2 2 3 3 3 .FRIDAY... SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT). SLIGHT CHANCE OF SNOW EARLY IN THE MORNING. SLIGHT CHANCE OF LIGHT SLEET EARLY IN THE MORNING. SLIGHT CHANCE OF RAIN IN THE LATE MORNING AND AFTERNOON. MAX TEMPERATURE.....AROUND 58. MIN HUMIDITY........38 PERCENT. WIND (20 FT)........LIGHT WINDS BECOMING SOUTH 5 TO 6 MPH IN THE AFTERNOON. CWR.................20 PERCENT. LAL.................1. MIXING HEIGHT.......4300-4800 FT AGL. TRANSPORT WINDS.....NORTHWEST 3 TO 10 MPH SHIFTING TO THE SOUTHWEST 7 TO 14 MPH LATE IN THE MORNING. DISPERSION INDEX....52 LATE IN THE MORNING...THEN DECREASING TO 25 LATE IN THE AFTERNOON. LVORI...............3. $$ FORECASTER...GIBBS REQUESTED BY...CARL SCHMIDT TYPE OF REQUEST...PRESCRIBED .TAG 20130321.24N__.01/FFC