FNUS72 KFFC 092338 FWSFFC SPOT FORECAST FOR PRE-PRESCRIBED...USFS NATIONAL WEATHER SERVICE PEACHTREE CITY GA 738 PM EDT MON APR 9 2012 FORECAST IS BASED ON IGNITION TIME OF 1000 EDT ON APRIL 10. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... FOR THE TOCCOA AREA ON TUESDAY 4/10/2012... EXPECT A WEAK AND MOSTLY DRY FRONTAL BOUNDARY TO PUSH ACROSS THIS AREA SOMETIME BETWEEN NOON AND 2 PM TUESDAY AFTERNOON. A MID LEVEL DECK OF CLOUDS BETWEEN 3000 AND 6000 FEET WILL LIKELY SPREAD IN FROM THE WEST-NORTHWEST JUST AHEAD AND ALONG THE FRONT. SEVERAL COMPUTER MODELS ARE SHOWING LIGHT MEASURABLE PRECIP WITH THE FRONT...A TENTH OF AN INCH OR LESS. HOWEVER... CURRENT DRY AIR MASS IN PLACE SUGGESTS THE MOST PRECIP LIKELY TO BE SEEN WILL BE A FEW SPRINKLES. ALL MODELS SHOW AN INCREASE IN DEWPOINTS FROM THE WEST AHEAD AND ALONG THE FRONT. EXPECT TO SEE AN INCREASE IN LOW LEVEL MOISTURE... HOWEVER... NOT SURE DEWPOINTS WILL INCREASE INTO THE UPPER 40S TO LOWER 50S AS THE MODELS SUGGEST. DECIDED TO GO WITH A COMPROMISE ON DEWPOINTS AND RH... DANCING BETWEEN THE LOW NUMBERS SEEN MONDAY AFTERNOON AND WHAT THE MODELS ARE INDICATING FOR TUESDAY AFTERNOON. THIS SHOULD GIVE YOU SOMETHING CLOSE TO A WORSE CASE SCENARIO. IF DEWPOINTS INCREASE AS MODELS SUGGESTS... THE AFTERNOON RH VALUES ON TUESDAY WILL BE MOSTLY IN THE 30S TO LOWER 40S. .TUESDAY... SKY/WEATHER.........MOSTLY SUNNY (30-40%) EARLY...BECOMING AT LEAST PARTLY CLOUDY BY AFTERNOON (40-60%). TEMPERATURE.........55-58 AT IGNITION...MAX 68-70. RH..................37 PERCENT AT IGNITION...MIN 28 PERCENT. WIND (20 FT)........WINDS NORTHWEST AROUND 6 MPH AT IGNITION...THEN INCREASING TO 10 TO 15 MPH WITH GUSTS TO AROUND 25 MPH BY LATE MORNING... THEN BECOMING WEST 15 TO 20 MPH WITH GUSTS TO AROUND 30 MPH DURING THE AFTERNOON. CWR.................10-20 PERCENT. LAL.................1. MIXING HEIGHT.......0 FT AGL AT IGNITION...OTHERWISE 0-100 FT AGL INCREASING TO 4400-4800 FT AGL LATE IN THE MORNING. TRANSPORT WINDS.....NORTHWEST 6 TO 9 MPH INCREASING TO WEST 22 TO 25 MPH BY LATE IN THE MORNING TO EARLY AFTERNOON. DISPERSION INDEX....INCREASING TO 60 BY MID MORNING...THEN INCREASING TO 85 BY EARLY AFTERNOON... THEN DECREASING TO AROUND 70 BY MID TO LATE AFTERNOON. LVORI...............2. TIME (EDT) 10 AM NOON 2 PM 4 PM SKY (%).........30 43 52 49 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE TEMP............58 66 67 67 RH..............37 29 28 29 20 FT WIND......NW 7 NW 12 W 17 W 18 20 FT WIND GUST.15 25 30 30 DISPERSION IDX..61 86 68 72 LVORI...........2 1 1 1 CWR.............10 20 20 10 .TUESDAY NIGHT... SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT). TEMPERATURE.........MIN 35. RH..................MAX 91 PERCENT. WIND (20 FT)........NORTHWEST WINDS 8 TO 15 MPH. CWR.................10 PERCENT. LAL.................1. MIXING HEIGHT.......4800 FT AGL DECREASING TO 300-400 FT AGL EARLY IN THE EVENING. TRANSPORT WINDS.....NORTHWEST 15 TO 25 MPH. DISPERSION INDEX....51 DECREASING TO 10. LVORI...............3. TIME (EDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM SKY (%).........45 42 42 42 14 14 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............69 58 49 44 41 38 RH..............28 42 62 77 84 85 20 FT WIND......NW 15 NW 10 NW 8 NW 8 NW 9 NW 9 20 FT WIND GUST.20 20 15 15 15 15 DISPERSION IDX..51 11 9 12 11 11 LVORI...........1 2 3 3 4 4 CWR.............10 10 10 10 0 0 .WEDNESDAY... DISPERSION INDEX....7 INCREASING TO 26 LATE IN THE MORNING...THEN INCREASING TO 46 LATE IN THE MORNING INCREASING TO 61 LATE IN THE MORNING DECREASING TO 53. LVORI...............3. $$ FORECASTER...DARBE REQUESTED BY...JASON TYPE OF REQUEST...PRE-PRESCRIBED .TAG 20120410.PREPR.01/FFC