FNUS72 KJAX 220206 FWSJAX SPOT FORECAST FOR COUNTY LINE FIRE...FLORIDA HIGHWAY PATROL NATIONAL WEATHER SERVICE JACKSONVILLE FL 1006 PM EDT MON MAY 21 2012 FORECAST IS BASED ON IGNITION TIME OF 2220 EDT ON MAY 21. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... LIGHT SOUTHWEST FLOW WILL PREVAIL TONIGHT IN ADVANCE OF A WEAK FRONTAL SYSTEM THAT WILL BE APPROACHING FROM THE WEST TONIGHT AND TUESDAY. DUE TO INCREASING SOUTHWEST FLOW TONIGHT...INCREASED MIXING IS EXPECTED TO PRECLUDE SIGNIFICANT FOG DEVELOPMENT AND WILL KEEP LDSI VALUES IN THE 6-8 UNIT RANGE. EXPECT RELATIVE HUMIDITY AND DISPERSION VALUES TO NEAR CRITICAL THRESHOLDS ON TUESDAY AFTERNOON....AND A RED FLAG WARNING MAY BE NEEDED BASED ON THE LATEST ERC VALUES. A WEAK FRONTAL BOUNDARY WILL APPROACH OUR REGION FROM THE NORTHWEST BY LATE TUESDAY AFTERNOON AND EVENING...BRINGING ISOLATED TO SCATTERED THUNDERSTORMS. HIGH PRESSURE WILL REBUILD OVER OUR REGION ON WEDNESDAY AND THURSDAY...WITH AFTERNOON RELATIVE HUMIDITY VALUES APPROACHING CRITICAL THRESHOLDS OVER INTERIOR LOCATIONS. .REST OF TONIGHT... SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT). MIN TEMPERATURE.....AROUND 62. MAX HUMIDITY........98 PERCENT. WIND (20 FT)........LIGHT WINDS. LAL.................1. MIXING HEIGHT.......600-2400 FT AGL. MIXING WINDS........SOUTH 6 TO 10 MPH. DISPERSION INDEX....5. CHANCE OF PCPN......10 PERCENT. LVORI...............5. TIME (EDT) 10 PM MIDNGT 2 AM 4 AM SKY (%).........30 30 32 36 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE TEMP............72 69 67 64 RH..............74 81 86 90 20 FT WIND......NW 2 SW 2 SW 3 SW 2 20 FT WIND GUST.5 5 5 5 MIX HGT (FT)....1900 1400 1100 800 TRANSPORT WIND..SE 10 S 10 S 10 S 7 LVORI...........3 4 5 6 DISPERSION INDX.6 6 6 4 CHC OF PCPN (%).10 10 10 10 LAL.............1 1 1 1 .TUESDAY... SKY/WEATHER.........PARTLY SUNNY (45-55 PERCENT). SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS EARLY IN THE MORNING. CHANCE OF SHOWERS AND THUNDERSTORMS LATE IN THE AFTERNOON. MAX TEMPERATURE.....AROUND 91. MIN HUMIDITY........34 PERCENT. WIND (20 FT)........LIGHT WINDS BECOMING SOUTHWEST 5 TO 9 MPH IN THE LATE MORNING AND AFTERNOON. LAL.................1 UNTIL 0800...THEN 2 UNTIL 1600...THEN 3. MIXING HEIGHT.......200-2000 FT AGL INCREASING TO 5500-6100 FT AGL. MIXING WINDS........WEST 6 TO 12 MPH INCREASING TO 15 TO 16 MPH LATE IN THE AFTERNOON. DISPERSION INDEX....6 INCREASING TO 21 LATE IN THE MORNING... INCREASING TO 82 IN THE AFTERNOON. CHANCE OF PCPN......20 PERCENT. LVORI...............5. TIME (EDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM SKY (%).........38 42 47 55 57 66 WEATHER COV..... S CHC S CHC S CHC S CHC CHANCE WEATHER TYPE....NONE TSTORM TSTORM TSTORM TSTORM TSTORM TEMP............63 66 79 87 91 90 RH..............94 88 58 43 34 35 20 FT WIND......SW 2 SW 3 SW 6 SW 7 SW 8 SW 9 20 FT WIND GUST.5 5 10 10 10 15 MIX HGT (FT)....400 800 3100 4800 6000 5900 TRANSPORT WIND..S 6 SW 7 W 9 W 10 W 12 W 15 LVORI...........8 5 1 1 1 1 DISPERSION INDX.4 8 36 62 82 65 CHC OF PCPN (%).10 10 20 20 20 30 LAL.............1 2 2 2 2 3 $$ FORECASTER...ENYEDI REQUESTED BY...SGT S W COODY TYPE OF REQUEST...PRESCRIBED .TAG 20120521.COUNT.01/JAX