FNUS72 KJAX 121554 FWSJAX SPOT FORECAST FOR GH-1A...FLORIDA DEP NATIONAL WEATHER SERVICE JACKSONVILLE FL 1154 AM EDT THU JUL 12 2012 FORECAST IS BASED ON IGNITION TIME OF 1000 EDT ON JULY 13. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...HIGH PRESSURE RIDGE NORTH OF THE AREA TODAY WILL CONTINUE THROUGH THE WEEKEND. SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TODAY THROUGH FRIDAY...MAINLY FROM LATE MORNING THROUGH THE EVENING HOURS. LOCALLY HEAVY RAINFALL AND GUSTY WINDS WILL BE POSSIBLE IN THE STRONGER THUNDERSTORM ACTIVITY. A RETURN TO MORE ISOLATED TO SCATTERED THUNDERSTORM ACTIVITY IS EXPECTED OVER THE WEEKEND AND EARLY NEXT WEEK AS THE ONSHORE FLOW CONTINUES. RELATIVE HUMIDITY VALUES WILL REMAIN WELL ABOVE CRITICAL LEVELS THROUGH THE PERIOD. PLEASE SEE LVORI INDICES BELOW IN THE 2 HOURLY FORECAST TABLE AND IN THE SUMMARY DAYTIME FORECAST. .REST OF TODAY... SKY/WEATHER.........PARTLY SUNNY (55-65 PERCENT). SLIGHT CHANCE OF SHOWERS IN THE MORNING...THEN CHANCE OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. MAX TEMPERATURE.....AROUND 90. MIN HUMIDITY........56 PERCENT. WIND (20 FT)........EAST WINDS 7 TO 12 MPH. LAL.................1 UNTIL 1200...THEN 2 UNTIL 1400...THEN 3. MIXING HEIGHT.......2400-3400 FT AGL. MIXING WINDS........EAST 9 TO 18 MPH. DISPERSION INDEX....30 INCREASING TO 59. CHANCE OF PCPN......30-40 PERCENT. LVORI...............2. TIME (EDT) 11 AM 1 PM 3 PM 5 PM SKY (%).........52 56 66 68 WEATHER COV.....S CHC CHANCE CHANCE CHANCE WEATHER TYPE....RNSHWR TSTORM TSTORM TSTORM TEMP............84 89 89 87 RH..............67 58 56 61 20 FT WIND......E 7 E 9 E 12 E 12 20 FT WIND GUST.10 15 15 15 MIX HGT (FT)....2400 3200 3400 2900 TRANSPORT WIND..E 9 E 14 E 16 E 18 LVORI...........3 1 1 1 DISPERSION INDX.30 35 44 58 CHC OF PCPN (%).20 40 40 40 LAL.............1 2 3 3 .TONIGHT... SKY/WEATHER.........MOSTLY CLOUDY (55-70 PERCENT). CHANCE OF SHOWERS AND THUNDERSTORMS IN THE EVENING...THEN SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT. MIN TEMPERATURE.....AROUND 72. MAX HUMIDITY........100 PERCENT. WIND (20 FT)........EAST WINDS 5 TO 10 MPH UNTIL EARLY MORNING BECOMING LIGHT. LAL.................3 UNTIL 2400...THEN 2 UNTIL 0300...THEN 1. MIXING HEIGHT.......700-2600 FT AGL DECREASING TO 200-500 FT AGL AFTER MIDNIGHT. MIXING WINDS........EAST 9 TO 18 MPH DECREASING TO 3 TO 7 MPH AFTER MIDNIGHT. DISPERSION INDEX....53 DECREASING TO 6. CHANCE OF PCPN......20 PERCENT. LVORI...............5. TIME (EDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM SKY (%).........68 67 66 62 60 54 WEATHER COV.....CHANCE CHANCE CHANCE S CHC S CHC WEATHER TYPE....TSTORM TSTORM TSTORM TSTORM TSTORM NONE TEMP............86 81 77 75 74 73 RH..............64 74 85 93 96 99 20 FT WIND......E 10 E 8 E 6 E 5 E 5 E 3 20 FT WIND GUST.15 10 10 5 MIX HGT (FT)....2600 1800 1000 500 300 200 TRANSPORT WIND..E 18 E 17 E 13 E 7 E 5 E 3 LVORI...........1 3 4 6 8 9 DISPERSION INDX.55 20 9 6 4 3 CHC OF PCPN (%).40 30 30 20 20 10 LAL.............3 3 3 2 2 1 .FRIDAY... SKY/WEATHER.........PARTLY SUNNY (45-55 PERCENT). CHANCE OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. MAX TEMPERATURE.....AROUND 90. MIN HUMIDITY........61 PERCENT. WIND (20 FT)........LIGHT WINDS BECOMING EAST 5 TO 12 MPH EARLY IN THE MORNING. LAL.................1 UNTIL 1200...THEN 3. MIXING HEIGHT.......200-1500 FT AGL INCREASING TO 2200-2900 FT AGL LATE IN THE MORNING. MIXING WINDS........EAST 3 TO 12 MPH INCREASING TO 14 TO 17 MPH LATE IN THE MORNING. DISPERSION INDEX....6 INCREASING TO 51. CHANCE OF PCPN......30 PERCENT. LVORI...............AROUND 7 INDEX AT 8 AM THEN 3 TO 5 INDEX BY 10 AM. $$ FORECASTER...SHASHY REQUESTED BY...JUSTIN TEALL TYPE OF REQUEST...PRESCRIBED .TAG 20120713.GH1A_.01/JAX