FNUS72 KFFC 092309 FWSFFC SPOT FORECAST FOR PRE-PRESCRIBED ...USFS NATIONAL WEATHER SERVICE PEACHTREE CITY GA 709 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..................45 PERCENT AT IGNITION...MIN 28 PERCENT. EYE LEVEL WINDS.....LIGHT NORTH-NW WINDS BECOMING WEST 10 TO 15 MPH BY LATE MORNING OR EARLY AFTERNOON. MIXING HEIGHT.......0-100 FT AGL AT IGNITION...OTHERWISE INCREASING TO 4300-5100 FT AGL LATE IN THE MORNING. TRANSPORT WINDS.....NORTH 3 TO 5 MPH INCREASING TO WEST 15 TO 20 MPH LATE IN THE MORNING TO EARLY AFTERNOON. DISPERSION INDEX....INCREASING TO 58 BY MID MORNING...THEN INCREASING TO 80 BY EARLY AFTERNOON... THEN DECREASING TO 69 BY MID TO LATE AFTERNOON. LVORI...............2. TIME (EDT) 10 AM NOON 2 PM 4 PM SKY (%).........30 42 58 55 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE TEMP............57 64 68 69 RH..............45 34 29 28 EYE LEVEL WIND..N 2 NW 8 W 12 W 15 EYE LVL WND GST.10 20 25 25 DISPERSION IDX..58 80 58 64 LVORI...........2 1 1 1 .TUESDAY NIGHT... SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT). TEMPERATURE.........MIN 37. RH..................MAX 88 PERCENT. EYE LEVEL WINDS.....NORTH WINDS 7 TO 12 MPH. MIXING HEIGHT.......5000 FT AGL DECREASING TO 300 FT AGL IN THE EVENING. TRANSPORT WINDS.....WEST 15 TO 20 MPH SHIFTING TO THE NORTH 10 TO 15 MPH IN THE EVENING. DISPERSION INDEX....46 DECREASING TO 7. LVORI...............3. TIME (EDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM SKY (%).........45 39 35 30 13 13 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............68 57 48 46 42 40 RH..............32 49 71 77 83 84 EYE LEVEL WIND..NW 8 NW 7 NW 4 N 4 N 5 N 5 EYE LVL WND GST.20 15 15 15 15 15 DISPERSION IDX..46 9 5 7 7 7 LVORI...........1 2 3 3 4 5 .WEDNESDAY... SKY/WEATHER.........SUNNY (10-20 PERCENT). TEMPERATURE.........MAX 58. RH..................MIN 27 PERCENT. EYE LEVEL WINDS.....NORTH WINDS 8 TO 15 MPH INCREASING TO 15 TO 18 MPH LATE IN THE MORNING. MIXING HEIGHT.......0-400 FT AGL INCREASING TO 3800-4600 FT AGL LATE IN THE MORNING. TRANSPORT WINDS.....NORTH 10 TO 15 MPH INCREASING TO 15 TO 20 MPH LATE IN THE MORNING. DISPERSION INDEX....7 INCREASING TO 52. LVORI...............3. $$ FORECASTER...DARBE REQUESTED BY...JASON TYPE OF REQUEST...PRE-PRESCRIBED