FNUS72 KJAX 220842 FWSJAX SPOT FORECAST FOR IMPASSABLE BAY...USDA-FOREST SERVICE NATIONAL WEATHER SERVICE JACKSONVILLE FL 442 AM EDT WED JUN 22 2011 FORECAST IS BASED ON REQUEST TIME OF 0404 EDT ON JUNE 22. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... VERY HOT CONDITIONS WILL CONTINUE TODAY WITH MAX TEMPERATURES AROUND 100 DEGREES. RELATIVE HUMIDITIES ARE EXPECTED TO BOTTOM OUT JUST BELOW 35 PERCENT FOR A PERIOD OF 1 TO 3 HOURS. AN ISOLATED SHOWER OR THUNDERSTORM WILL BE POSSIBLE DURING THE AFTERNOON AND EVENING HOURS. ANY RAINFALL AMOUNTS WILL BE LIGHT...AVERAGING LESS THAN A QUARTER OF AN INCH. PREVAILING WESTERLY WINDS WILL AVERAGE 10 MPH OR LESS. WINDS WILL BRIEFLY INCREASE TO AROUND 15 MPH BEHIND THE GULF COAST SEABREEZE LATE THIS AFTERNOON. RELATIVE HUMIDITIES AND RAIN CHANCES WILL INCREASE ON THURSDAY AS UPPER LEVEL TROUGHING TAKES THE PLACE OF THE STRONG UPPER LEVEL RIDGE. THIS PATTERN WILL PERSIST THROUGH THE WEEKEND. AVERAGE RAINFALL AMOUNTS WILL BE MUCH HIGHER AS THUNDERSTORMS BECOME MORE NUMEROUS. .TODAY... SKY/WEATHER.........MOSTLY SUNNY (45-55 PERCENT). AREAS OF SMOKE EARLY IN THE MORNING. CHANCE OF SHOWERS AND THUNDERSTORMS EARLY IN THE AFTERNOON. MAX TEMPERATURE.....AROUND 100. MIN HUMIDITY........33 PERCENT. WIND (20 FT)........LIGHT WINDS BECOMING WEST 5 TO 10 MPH. LAL.................1 UNTIL 1400...THEN 3. MIXING HEIGHT.......1100-1900 FT AGL INCREASING TO 8000-8100 FT AGL. MIXING WINDS........WEST 10 TO 15 MPH. DISPERSION INDEX....40. TIME (EDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM SKY (%).........31 34 34 37 54 54 WEATHER COV.....AREAS AREAS AREAS AREAS CHANCE CHANCE WEATHER TYPE....SMOKE SMOKE SMOKE SMOKE TSTORM TSTORM TEMP............73 77 88 96 99 97 RH..............95 86 58 42 34 35 20 FT WIND......W 3 W 5 W 5 W 6 W 8 W 12 20 FT WIND GUST.5 10 10 12 15 MIX HGT (FT)....1100 1900 1900 4800 8000 8000 TRANSPORT WIND..SW 7 SW 8 SW 8 W 8 W 11 W 13 DISPERSION INDX.3 20 20 45 40 40 LAL.............1 1 1 1 3 3 .TONIGHT... SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT) THEN BECOMING PARTLY CLOUDY (45-55 PERCENT). AREAS OF SMOKE EARLY IN THE EVENING. CHANCE OF SHOWERS AND THUNDERSTORMS UNTIL EARLY MORNING. MIN TEMPERATURE.....AROUND 74. MAX HUMIDITY........96 PERCENT. WIND (20 FT)........WEST WINDS 5 TO 15 MPH. LAL.................3 UNTIL 0200...THEN 1. MIXING HEIGHT.......8100 FT AGL DECREASING TO 300-1200 FT AGL EARLY IN THE EVENING. MIXING WINDS........SOUTHWEST 5 TO 15 MPH. DISPERSION INDEX....3. LVORI...............6. TIME (EDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM SKY (%).........66 46 46 46 50 50 WEATHER COV.....CHANCE CHANCE CHANCE CHANCE WEATHER TYPE....RNSHWR TSTORM TSTORM TSTORM NONE NONE TEMP............93 87 82 79 77 75 RH..............43 56 69 78 88 93 20 FT WIND......W 14 W 13 SW 8 S 5 S 5 SW 5 20 FT WIND GUST.18 15 10 10 MIX HGT (FT)....8100 400 400 1000 300 300 TRANSPORT WIND..SW 15 S 13 S 13 S 8 SW 5 SW 5 LVORI...........6 6 6 6 6 6 LAL.............3 3 3 3 1 1 .THURSDAY... SKY/WEATHER.........PARTLY SUNNY (60-70 PERCENT). CHANCE OF SHOWERS AND THUNDERSTORMS EARLY IN THE MORNING. SHOWERS AND THUNDERSTORMS LIKELY EARLY IN THE AFTERNOON. MAX TEMPERATURE.....AROUND 95. MIN HUMIDITY........45 PERCENT. WIND (20 FT)........WEST WINDS AROUND 5 MPH EARLY IN THE MORNING BECOMING LIGHT...THEN BECOMING SOUTHWEST 5 TO 6 MPH IN THE LATE MORNING AND AFTERNOON. LAL.................1 UNTIL 0800...THEN 3 UNTIL 1400...THEN 4. MIXING HEIGHT.......1200-2100 FT AGL INCREASING TO 4900 FT AGL LATE IN THE MORNING...THEN INCREASING TO 7300 FT AGL EARLY IN THE AFTERNOON DECREASING TO 400 FT AGL LATE IN THE AFTERNOON. MIXING WINDS........SOUTHWEST 5 TO 7 MPH. DISPERSION INDEX....26. $$ FORECASTER...SHULER REQUESTED BY...PETER MYERS TYPE OF REQUEST...WILDFIRE .TAG 20110622.IMPAS.01/JAX