FNUS72 KJAX 281512 FWSJAX SPOT FORECAST FOR PAYNES PRAIRIE...FPS NATIONAL WEATHER SERVICE JACKSONVILLE FL 1012 AM EST FRI JAN 28 2011 FORECAST IS BASED ON IGNITION TIME OF 1000 EST ON JANUARY 28. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 6 PM EST THIS EVENING... .DISCUSSION...THE COMBINATION OF HIGH PRESSURE ADVANCING EAST ACROSS THE GULF OF MEXICO AND A COLD FRONT APPROACHING FROM THE NORTH WILL LIKELY GENERATE SUSTAINED WINDS AROUND 15 MPH LATER THIS MORNING AND INTO THIS AFTERNOON. GUSTS TO 25 MPH ARE EXPECTED. A DRY AIR MASS WILL LINGER WITH RELATIVE HUMIDITIES FORECAST TO BOTTOM OUT AROUND 35 PERCENT ACROSS MOST AREAS. A RED FLAG WARNING IS IN EFFECT THIS AFTERNOON ACROSS NORTHEAST FLORIDA DUE TO LOW RH AND WINDS. ON SATURDAY...MOST LOCALES WILL AGAIN BOTTOM OUT AROUND 35 PERCENT... HOWEVER WINDS WILL SUSTAIN LESS THAN 15 MPH. RED FLAGS ARE NOT ANTICIPATED DUE TO LIGHT WINDS AND SHORT DURATIONS OF CRITICALLY LOW RH VALUES. .TODAY... SKY/WEATHER.........SUNNY (10-20 PERCENT). MAX TEMPERATURE.....AROUND 64-65. MIN HUMIDITY........34 PERCENT. WIND (20 FT)........WEST 9 TO 15 MPH. MIXING HEIGHT.......1600 FT AGL INCREASING TO 3300-4000 FT AGL IN THE AFTERNOON. MIXING WINDS........WEST 7 TO 10 MPH INCREASING TO 17 TO 23 MPH IN THE LATE MORNING AND AFTERNOON. DISPERSION INDEX....63. TIME (EST) 10 AM NOON 2 PM 4 PM SKY (%).........6 6 8 10 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE TEMP............56 60 64 64 RH..............52 41 35 34 20 FT WIND......W 10 W 14 W 15 W 13 20 FT WIND GUST.15 20 25 20 MIX HGT (FT)....1600 2400 4000 3300 TRANSPORT WIND..W 17 W 17 W 23 W 18 DISPERSION INDX.12 36 64 62 .TONIGHT... SKY/WEATHER.........MOSTLY CLEAR (5-15 PERCENT). MIN TEMPERATURE.....AROUND 39. MAX HUMIDITY........93 PERCENT. WIND (20 FT)........WEST WINDS 5 TO 8 MPH EARLY IN THE EVENING BECOMING LIGHT. MIXING HEIGHT.......3300 FT AGL DECREASING TO 300-900 FT AGL. MIXING WINDS........WEST 13 TO 18 MPH DECREASING TO 6 TO 8 MPH IN THE LATE EVENING AND OVERNIGHT. DISPERSION INDEX....2. LVORI...............6. TIME (EST) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM SKY (%).........10 10 10 10 10 10 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............57 49 46 44 42 40 RH..............51 70 80 85 87 90 20 FT WIND......W 8 W 5 W 3 W 3 W 2 W 1 20 FT WIND GUST.15 10 10 10 10 10 MIX HGT (FT)....3300 900 600 600 300 300 TRANSPORT WIND..W 18 W 13 W 8 W 8 W 6 W 6 LVORI...........6 6 6 6 6 6 DISPERSION INDX.74 16 8 4 3 3 .SATURDAY... SKY/WEATHER.........SUNNY (5-15 PERCENT). MAX TEMPERATURE.....AROUND 70. MIN HUMIDITY........35 PERCENT. WIND (20 FT)........LIGHT WINDS BECOMING WEST 5 TO 7 MPH LATE IN THE MORNING. MIXING HEIGHT.......500-2000 FT AGL INCREASING TO 3000-3500 FT AGL IN THE AFTERNOON. MIXING WINDS........WEST 6 TO 12 MPH. DISPERSION INDEX....49. TIME (EST) 6 AM 8 AM 10 AM NOON 2 PM 4 PM SKY (%).........10 12 10 10 8 12 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............39 40 54 65 70 70 RH..............91 93 65 44 37 36 20 FT WIND......W 1 W 1 W 3 W 6 W 7 W 7 20 FT WIND GUST.7 10 10 15 15 15 MIX HGT (FT)....300 600 1700 2300 3500 3000 TRANSPORT WIND..W 6 NW 9 W 10 W 10 W 12 W 12 DISPERSION INDX.3 4 5 28 49 43 $$ FORECASTER...SHASHY REQUESTED BY...MATT BLEDSOE TYPE OF REQUEST...PRESCRIBED .TAG 20110129.PAYNE.01/JAX