FNUS73 KJKL 161533 FWSJKL SPOT FORECAST FOR LONGBRANCH...USFS NATIONAL WEATHER SERVICE JACKSON KY 1133 AM EDT FRI APR 16 2010 FORECAST IS BASED ON REQUEST TIME OF 1050 EDT ON APRIL 16. IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...A COLD FRONT APPROACHING FROM THE NORTH WILL ENCROACH ON HIGH PRESSURE CENTERED TO OUR SOUTH...WITH THE INCREASING PRESSURE GRADIENT RESULTING IN WINDS PICKING UP AND BECOMING GUSTY TODAY. RELATIVE HUMIDITY SHOULD NOT BE QUITE AS LOW AS IN RECENT DAYS...BUT STILL ON THE DRY SIDE WITH MINS AROUND 30 PERCENT THIS AFTERNOON. THERE IS A SLIGHT CHANCE OF A SHOWER OR THUNDERSTORM DEVELOPING DURING OR JUST AFTER THE PEAK HEATING HOURS LATE IN THE DAY. HOWEVER... THE BETTER CHANCE OF RAIN WILL BE TONIGHT AS THE COLD FRONT MOVES THROUGH FROM NORTH TO SOUTH...WITH A PROBABILITY OF RAIN AT 60 PERCENT. HOWEVER...OUTSIDE OF THUNDERSTORMS...RAINFALL AMOUNTS ARE EXPECTED TO BE FAIRLY LIGHT...GENERALLY LESS THAN A QUARTER INCH. MUCH COOLER AND DRIER AIR WILL RETURN BEHIND THE COLD FRONT FOR SATURDAY...WITH NEAR CRITICAL WIND AND RELATIVE HUMIDITY CONDITIONS BEING A POSSIBILITY. .REST OF TODAY... SKY/WEATHER.........SUNNY...THEN BECOMING PARTLY CLOUDY. A SLIGHT CHANCE OF A SHOWER OR THUNDERSTORM LATE IN THE AFTERNOON. MAX TEMPERATURE.....AROUND 83. MIN HUMIDITY........30 PERCENT. WIND (20 FT)........WEST WINDS 10 TO 15 MPH...WITH GUSTS INCREASING TO 25 TO 30 MPH. UPR SLP/RIDGETOP...WEST AROUND 15 MPH...WITH GUSTS INCREASING TO AROUND 30 MPH. POP.................20 PERCENT. LAL.................1 UNTIL 1700...THEN 2. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......MAX OF 9000 FT AGL. TRANSPORT WINDS.....WEST AROUND 27 MPH. DISPERSION INDEX....222. TIME (EDT) NOON 2 PM 4 PM 6 PM SKY (%).........4 4 22 32 WEATHER COV..... S CHC WEATHER TYPE....NONE NONE NONE TSTORM TEMP............77 81 83 78 RH..............44 38 30 32 20 FT WIND......W 12 W 14 W 15 W 14 20 FT WIND GUST.23 30 30 25 HAINES INDEX....5 5 5 5 .TONIGHT... SKY/WEATHER.........BECOMING MOSTLY CLOUDY. SHOWERS LIKELY...AND A CHANCE OF AN EVENING THUNDERSTORM. MIN TEMPERATURE.....AROUND 46. MAX HUMIDITY........90-100 PERCENT. WIND (20 FT)........WEST WINDS AROUND 10 MPH...BECOMING NORTH AND DIMINISHING TO AROUND 5 MPH. UPR SLP/RIDGETOP...WEST 10 TO 15 MPH...BECOMING NORTH AND DIMINISHING TO 5 TO 10 MPH. POP.................60 PERCENT. LAL.................3 UNTIL 0200...THEN 1. HAINES INDEX........3 TO 4 OR OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH TO OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. TIME (EDT) 8 PM 10 PM MIDNGT 2 AM 4 AM 6 AM SKY (%).........45 79 95 100 85 69 WEATHER COV.....CHANCE CHANCE LIKELY LIKELY CHANCE CHANCE WEATHER TYPE....TSTORM TSTORM RNSHWR RNSHWR RNSHWR RNSHWR TEMP............74 68 60 54 51 48 RH..............36 47 65 77 93 96 20 FT WIND......W 10 W 9 W 9 NW 8 NW 7 N 4 20 FT WIND GUST.20 15 15 20 20 15 HAINES INDEX....4 4 4 3 3 3 .SATURDAY... SKY/WEATHER.........MOSTLY SUNNY. MAX TEMPERATURE.....AROUND 62. MIN HUMIDITY........26 PERCENT. WIND (20 FT)........NORTHWEST WINDS 7 TO 13 MPH. GUSTS OF 15 TO 20 MPH IN THE AFTERNOON. UPR SLP/RIDGETOP...NORTHWEST 10 TO 15 MPH. GUSTS AROUND 20 MPH IN THE AFTERNOON. POP.................10 PERCENT. LAL.................1. HAINES INDEX........2 TO 3 OR OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......6300 FT AGL. TRANSPORT WINDS.....NORTHWEST AROUND 18 MPH. DISPERSION INDEX....138. TIME (EDT) 8 AM 10 AM NOON 2 PM 4 PM 6 PM SKY (%).........43 34 22 13 13 13 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............47 52 58 60 62 61 RH..............83 62 46 38 27 27 20 FT WIND......N 7 NW 7 NW 9 NW 10 NW 12 NW 12 20 FT WIND GUST.15 15 15 18 19 18 HAINES INDEX....2 2 2 3 3 3 $$ FORECASTER...HAL REQUESTED BY...ROYCE TYPE OF REQUEST...WILDFIRE .TAG 20100416.LONGB.01/JKL