FNUS71 KLWX 121217 FWSLWX SPOT FORECAST FOR SPOTSY CH RX FIRES 09...NATIONAL PARK SERVICE NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 817 AM EDT THU MAR 12 2009 FORECAST IS BASED ON IGNITION TIME OF 0930 EDT ON MARCH 12. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... HIGH PRESSURE WILL BUILD FROM THE NORTHERN PLAINS TO THE GREAT LAKES TODAY. NORTH-NORTHWESTERLY WINDS EARLY THIS MORNING WILL BE AROUND 10 MPH WITH AN OCCASIONAL GUST TO AROUND 15 MPH...AND WILL DIMINISH LATER THIS AFTERNOON AS THE HIGH NEARS. RELATIVE HUMIDITY WILL DROP BELOW 30 PERCENT THIS AFTERNOON...BUT WINDS SHOULD BE FAIRLY LIGHT BY THAT POINT. A SERIES OF SHORTWAVE DISTURBANCES WILL TRACK FROM THE SOUTHERN PLAINS ACROSS THE CAROLINAS TONIGHT INTO THIS WEEKEND. THE FIRST OF THESE IMPULSES WILL SPREAD LIGHT ACCUMULATING SNOW ACROSS CENTRAL VIRGINIA AFTER MIDNIGHT. ADDITIONAL IMPULSES WILL KEEP THE NORTHERN EDGE OF THE PRECIPITATION SHIELD NEARBY THROUGH FRIDAY AND INTO THE WEEKEND. .TODAY... SKY/WEATHER.........PARTLY SUNNY (60-70 PERCENT). MAX TEMPERATURE.....AROUND 50. MIN HUMIDITY........24 PERCENT. WIND (20 FT)........NORTH WINDS 5 TO 7 MPH UNTIL LATE AFTERNOON...BECOMING LIGHT AND VARIABLE. CWR.................10 PERCENT. MIXING HEIGHT.......2900-4600 FT AGL. MIXING WINDS........NORTH 15 TO 24 MPH...DECREASING TO 7 TO 13 MPH IN THE AFTERNOON. TIME (EDT) 9 AM 11 AM 1 PM 3 PM 5 PM SKY (%).........47 53 68 75 81 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE TEMP............39 44 47 49 48 RH..............37 29 26 24 25 20 FT WIND......N 5 N 6 N 4 N 2 N 2 20 FT WIND GUST.10 15 10 5 5 CWR.............0 0 0 10 10 .TONIGHT... SKY/WEATHER.........CLOUDY (85-95 PERCENT). A SLIGHT CHANCE OF RAIN AND SNOW LATE IN THE EVENING. A CHANCE OF SNOW AFTER MIDNIGHT. MIN TEMPERATURE.....AROUND 31. MAX HUMIDITY........82 PERCENT. WIND (20 FT)........LIGHT AND VARIABLE WINDS. CWR.................10 PERCENT...INCREASING TO 50 PERCENT IN THE EVENING. MIXING HEIGHT.......3100-4500 FT AGL...DECREASING TO 1700-2300 FT AGL LATE. MIXING WINDS........NORTHEAST 1 TO 8 MPH. TIME (EDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM SKY (%).........84 94 94 95 99 99 WEATHER COV..... S CHC CHANCE CHANCE WEATHER TYPE....NONE NONE NONE RAIN SNOW SNOW TEMP............47 42 39 37 35 34 RH..............26 31 40 52 66 72 20 FT WIND......N 2 NE 2 N 2 N 2 N 2 N 2 20 FT WIND GUST.5 5 5 5 5 5 CWR.............10 10 10 20 50 50 .FRIDAY... SKY/WEATHER.........CLOUDY (90-100 PERCENT). A CHANCE OF RAIN. MAX TEMPERATURE.....AROUND 43. MIN HUMIDITY........60 PERCENT. WIND (20 FT)........LIGHT AND VARIABLE WINDS. CWR.................40 PERCENT. MIXING HEIGHT.......1600-3500 FT AGL...INCREASING TO 3400-3600 FT AGL LATE. MIXING WINDS........SOUTHEAST 3 TO 8 MPH. TIME (EDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM SKY (%).........98 96 93 90 88 88 WEATHER COV.....CHANCE CHANCE CHANCE CHANCE CHANCE CHANCE WEATHER TYPE....RAIN RAIN RAIN RAIN RAIN RAIN TEMP............33 33 36 39 42 42 RH..............78 82 72 67 60 60 20 FT WIND......N 2 NE 2 NE 2 E 2 E 3 SE 3 20 FT WIND GUST.5 5 5 5 5 5 CWR.............40 40 40 40 30 30 $$ FORECASTER...JACKSON REQUESTED BY...GREGG KNEIPP TYPE OF REQUEST...PRESCRIBED .TAG 20090312.SPOTS.02/LWX