FNUS72 KFFC 281154 FWSFFC SPOT FORECAST FOR TRAIL RIDGE...USDA FOREST SERVICE NATIONAL WEATHER SERVICE PEACHTREE CITY GA 754 AM EDT THU MAR 28 2013 FORECAST IS BASED ON IGNITION TIME OF 1000 EDT ON MARCH 28. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... LOW RH VALUES EXPECTED TODAY. MINIMUM RH SHOULD BOTTOM OUT AROUND 25 TO 27 PERCENT BETWEEN 4-5 PM. GENERALLY EXPECTING NORTHWEST WINDS IN THE 5-10KT RANGE BUT GIVEN THE ELEVATION OF THE BURN AND THE ASPECT AND EXPOSURE...WOULD NOT BE SURPRISED TO SEE SLIGHTLY ELEVATED VALUES IN THE AFTERNOON OF 10 TO 15 MPH WITH GUSTS TO 20 MPH. IF WINDS DO REACH THIS THRESHOLD...SOME ADDITIONAL MIXING WOULD BE PRESENT DRIVING RH VALUES A PERCENT OR 2 HIGHER. A FIRE DANGER STATEMENT HAS BEEN ISSUED TODAY FOR THIS AREA. .TODAY... SKY/WEATHER.........MOSTLY SUNNY (35-45 PERCENT). MAX TEMPERATURE.....AROUND 57. MIN HUMIDITY........26 PERCENT. WIND (20 FT)........NORTHWEST WINDS 5 TO 6 MPH EARLY IN THE MORNING BECOMING LIGHT...THEN BECOMING WEST 5 TO 12 MPH LATE IN THE MORNING. CWR.................0 PERCENT. LAL.................1. MIXING HEIGHT.......0-200 FT AGL INCREASING TO 2400-3900 FT AGL LATE IN THE MORNING. TRANSPORT WINDS.....NORTHWEST 6 TO 15 MPH INCREASING TO AROUND 16 MPH IN THE AFTERNOON. DISPERSION INDEX....7 INCREASING TO 54. LVORI...............3. TIME (EDT) 10 AM NOON 2 PM 4 PM SKY (%).........25 51 51 51 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE TEMP............36 45 52 56 RH..............63 44 31 26 20 FT WIND......NW 3 NW 6 W 9 W 12 20 FT WIND GUST.10 10 15 20 DISPERSION IDX..11 41 55 57 LVORI...........2 1 1 1 CWR.............0 0 0 0 .TONIGHT... SKY/WEATHER.........MOSTLY CLOUDY (45-55 PERCENT) THEN BECOMING PARTLY CLOUDY (25-35 PERCENT). MIN TEMPERATURE.....AROUND 30. MAX HUMIDITY........74 PERCENT. WIND (20 FT)........WEST WINDS 5 TO 10 MPH IN THE EVENING BECOMING LIGHT. CWR.................10 PERCENT. LAL.................1. MIXING HEIGHT.......3300 FT AGL DECREASING TO 0-100 FT AGL EARLY IN THE EVENING. TRANSPORT WINDS.....NORTH 5 TO 14 MPH. DISPERSION INDEX....45 DECREASING TO 2. LVORI...............2. TIME (EDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM SKY (%).........51 26 26 26 26 26 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............54 46 40 35 33 32 RH..............28 39 51 62 68 71 20 FT WIND......NW 10 NW 6 W 5 NW 3 NW 3 NW 2 20 FT WIND GUST.15 10 5 5 5 DISPERSION IDX..45 4 2 2 2 2 LVORI...........1 2 2 3 3 3 CWR.............0 0 0 0 0 0 .FRIDAY... SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT). SLIGHT CHANCE OF RAIN SHOWERS EARLY IN THE AFTERNOON. MAX TEMPERATURE.....AROUND 59. MIN HUMIDITY........33 PERCENT. WIND (20 FT)........LIGHT WINDS BECOMING WEST 5 TO 7 MPH IN THE AFTERNOON. CWR.................10 PERCENT INCREASING TO 20 PERCENT EARLY IN THE AFTERNOON. LAL.................1. MIXING HEIGHT.......0 FT AGL INCREASING TO 2800-4700 FT AGL LATE IN THE MORNING. TRANSPORT WINDS.....NORTHWEST 5 TO 13 MPH. DISPERSION INDEX....5 INCREASING TO 45. LVORI...............2. TIME (EDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM SKY (%).........38 55 55 55 67 67 WEATHER COV..... S CHC S CHC WEATHER TYPE....NONE NONE NONE NONE RNSHWR RNSHWR TEMP............31 32 40 49 55 59 RH..............73 71 56 43 35 34 20 FT WIND......NW 3 NW 3 NW 3 NW 5 W 6 W 7 20 FT WIND GUST.5 5 5 10 10 10 DISPERSION IDX..2 5 7 31 44 47 LVORI...........3 3 3 1 1 1 CWR.............10 10 10 10 20 20 $$ FORECASTER...SMITH REQUESTED BY...DAVE MARTIN TYPE OF REQUEST...PRESCRIBED .TAG 20130328.TRAIL.02/FFC