FNUS71 KRNK 231450 FWSRNK SPOT FORECAST FOR NO BUSINESS...USFS NATIONAL WEATHER SERVICE BLACKSBURG VA 1050 AM EDT TUE APR 23 2013 FORECAST IS BASED ON IGNITION TIME OF 1124 EDT ON APRIL 23. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... A RIDGE OF HIGH PRESSURE EXTENDING SOUTH ALONG THE APPALACHIAN MOUNTAINS FROM NEW ENGLAND WILL REMAIN IN PLACE THIS MORNING BEFORE SLOWLY WEAKENING LATER TODAY AND TONIGHT. EASTERLY FLOW BETWEEN THIS FEATURE AND LOW PRESSURE OFFSHORE WILL KEEP AN AREA OF LOW CLOUDS ALONG AND EAST OF THE BLUE RIDGE THIS MORNING BEFORE GRADUALLY ERODING FROM THE WEST BY THIS AFTERNOON. AS THE WEDGE OF COOL AIR BREAKS DOWN...WINDS WILL BECOME MORE SOUTH AND SOUTHWEST THIS AFTERNOON BUT REMAIN LIGHT INTO THE OVERNIGHT. WITHIN THE PRESCRIBED BURN AREA SPECIFICALLY...WINDS HAVE ALREADY SHIFTED TO THE SOUTH OR SOUTH-SOUTHWEST AROUND 5 MPH AND SKIES HAVE CLEARED. ANY EASTERLY WINDS AND ANY LOW CLOUD COVER SHOULD REMAIN EAST OF A NEWPORT...BLACKSBURG...HILLSVILLE LINE FOR THE REMAINDER OF THE AFTERNOON. A COLD FRONT WILL MOVE ACROSS THE AREA FROM THE WEST WEDNESDAY. SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TO ACCOMPANY THE FRONTAL PASSAGE WEDNESDAY AFTERNOON WITH OVERALL RAINFALL AMOUNTS OF A TENTH /0.10/ TO ONE QUARTER /0.25/ OF AN INCH...WITH UPWARDS OF A HALF /.50/ INCH POSSIBLE FROM THE ALLEGHANY MOUNTAINS WESTWARD INTO WEST VIRGINIA. DRIER AND COOLER AIR WILL FOLLOW THE FRONT ON THURSDAY AS WINDS SHIFT TO THE NORTHWEST AND HIGH PRESSURE BUILDS IN FROM THE WEST. MINIMUM RELATIVE HUMIDITIES WITHIN THE BURN AREA AT ELEVATIONS BELOW 3000 FEET WILL DROP BELOW 30 PERCENT AT TIME THIS AFTERNOON AND INTO THE EARLY EVENING...MAINLY INTO THE 25 TO 30 PERCENT RANGE. .REST OF TODAY... SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT). MAX TEMPERATURE.....AROUND 64. MIN HUMIDITY........30 TO 35 PERCENT. WIND (20 FT)........LIGHT SOUTH WIND. CWR (0.01 IN).......0 PERCENT. MIXING HEIGHT.......2100 FT AGL...INCREASING TO 3700 FT AGL EARLY IN THE AFTERNOON. TRANSPORT WINDS.....SOUTHWEST 5 TO 7 MPH. TIME (EDT) 12P 1PM 2PM 3PM 4PM 5PM SKY (%).............25 24 23 20 17 17 WEATHER COV......... WEATHER TYPE........ TSTM COV............ TEMP................51 54 56 59 62 61 RH..................45 42 40 36 34 33 20 FT WIND DIR......SW W W W W W 20 FT WIND SPD......2 2 2 2 2 3 20 FT WIND GUST.....5 5 5 5 5 5 CWR.................0 0 0 0 0 0 .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT)...THEN BECOMING MOSTLY CLOUDY (50-60 PERCENT) AFTER MIDNIGHT. MIN TEMPERATURE.....AROUND 50. MAX HUMIDITY........80 PERCENT. WIND (20 FT)........LIGHT AND VARIABLE WINDS...BECOMING SOUTHWEST AROUND 5 MPH EARLY IN THE EVENING. CWR (0.01 IN).......0 PERCENT. MIXING HEIGHT.......1500 FT AGL...DECREASING TO 300 FT AGL EARLY IN THE EVENING. TRANSPORT WINDS.....SOUTH 5 TO 15 MPH...INCREASING TO SOUTHWEST 15 TO 25 MPH IN THE LATE EVENING AND OVERNIGHT...THEN DECREASING TO 8 TO 14 MPH LATE. TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM SKY (%).............23 33 41 44 46 47 51 54 58 60 62 62 WEATHER COV......... WEATHER TYPE........ TSTM COV............ TEMP................61 61 61 60 60 60 59 59 58 57 56 54 RH..................34 37 39 41 42 44 45 47 50 54 59 65 20 FT WIND DIR......SW SW S S S S S S S S SW SW 20 FT WIND SPD......3 3 4 4 4 4 4 4 5 5 5 5 20 FT WIND GUST.....5 5 10 5 5 5 10 10 10 10 10 10 CWR.................0 0 0 0 0 0 0 0 0 0 0 0 .WEDNESDAY... SKY/WEATHER.........MOSTLY CLOUDY (90-100 PERCENT). A CHANCE OF SHOWERS DURING THE AFTERNOON...WITH ISOLATED THUNDERSTORMS. MAX TEMPERATURE.....AROUND 70. MIN HUMIDITY........45 PERCENT. WIND (20 FT)........SOUTHWEST WINDS 15 TO 20 MPH WITH GUSTS UP TO 40 MPH. CWR (0.01 IN).......80 PERCENT. MIXING HEIGHT.......2200 FT AGL...INCREASING TO 3900 FT AGL IN THE EARLY AFTERNOON...THEN DECREASING AFTER RAIN MOVES INTO THE REGION. TRANSPORT WINDS.....SOUTHWEST 10 TO 20 MPH...INCREASING TO 30 TO 35 MPH. TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM SKY (%).............61 58 54 55 59 64 69 72 73 80 91 97 WEATHER COV......... SCH CHC LKY DEF WEATHER TYPE........ RW RW RW RW TSTM COV............ SCT SCT SCT TEMP................52 50 53 56 59 62 64 65 67 68 69 69 RH..................72 80 69 65 62 58 52 46 42 41 41 41 20 FT WIND DIR......SW S SW SW SW SW SW SW SW SW SW SW 20 FT WIND SPD......5 5 11 11 12 12 12 12 13 14 15 16 20 FT WIND GUST.....10 10 30 30 30 30 30 30 35 35 40 40 CWR.................0 0 0 0 0 0 10 10 20 40 70 80 $$ FORECASTER...BEASLEY REQUESTED BY...TODD CAUDILL TYPE OF REQUEST...PRESCRIBED .TAG 20130423.NOBUS.01/RNK