EXPERIMENTAL...FIRE WEATHER PLANNING FORECAST FOR VA NATL FORESTS NATIONAL WEATHER SERVICE BLACKSBURG VA 308 PM EDT Tue May 21 2013 .DISCUSSION... FIRE WEATHER THREATS WILL REMAIN LOW INTO THURSDAY...WITH SHOWERS AND THUNDERSTORMS IN THE FORECAST. LOW PRESSURE ALOFT ACROSS SOUTHERN VIRGINIA WILL PUSH EAST INTO THE ATLANTIC OCEAN TONIGHT. A LARGE LOW PRESSURE SYSTEM WILL TRACK FROM THE CENTRAL PLAINS INTO THE GREAT LAKES BY THURSDAY. THIS SYSTEM WILL PUSH A COLD FRONT THROUGH THE AREA THURSDAY...FOLLOWED BY HIGH PRESSURE ON FRIDAY. RELATIVE HUMIDITY AS LOW AS THE 40 AND 50S THIS AFTERNOON WILL REBOUND QUICKLY TONIGHT TO MAXIMUM FROM 85 TO 100 PERCENT. MINIMUM RELATIVE HUMIDITY WEDNESDAY AFTERNOON WILL VARY FROM THE MID 40S TO AROUND 70 PERCENT ALONG SOUTHERN BLUE RIDGE. VAZ007-009>015-220900- JEFFERSON NATIONAL FOREST SOUTH ZONE- INCLUDING...BLACKSBURG...WYTHE...MT ROGERS 308 PM EDT TUE MAY 21 2013 TONIGHT WED WED NIGHT THU CLOUD COVER PCLDY PCLDY MCLDY PCLDY PRECIP TYPE TSTMS TSTMS TSTMS TSTMS CHANCE PRECIP (%) 40 50 50 50 MIN/MAX TEMP 59 82 59 72 MAX/MIN RH % 95 48 94 53 WND20FT2MIN/EARLY(MPH)LGT/VAR LGT/VAR S 6 SW 5 WND20FT2MIN/LATE(MPH) LGT/VAR SW 7G17 S 5 W 8 PRECIP AMOUNT 0.09 0.11 0.15 0.15 PRECIP DURATION 3 2 2 2 PRECIP BEGIN 6 PM CONTINUING CONTINUING CONTINUING PRECIP END CONTINUING CONTINUING CONTINUING CONTINUING MIXING HGT(FT-AGL) 8340 8210 TRANSPORT WND (MPH) SW 18 W 21 VENT RATE (MPH-FT) 150120 172410 DISPERSION (EVENING) POOR POOR LAL 3 4 4 3 HAINES INDEX 4 4 4 4 ADI EARLY 35 FAIR 36 FAIR 57 GEN GOOD 55 GEN GOOD ADI LATE 4 VERY POOR 58 GEN GOOD 14 GEN POOR 72 GOOD MAX LVORI EARLY 4 7 3 5 MAX LVORI LATE 5 2 5 1 REMARKS...NONE. .FORECAST FOR DAYS 3 THROUGH 7... .THURSDAY NIGHT AND FRIDAY...MOSTLY CLOUDY. A CHANCE OF SHOWERS. LOWS IN THE LOWER 50S. HIGHS IN THE MID 60S. MINIMUM RH 56 PERCENT. NORTHWEST WINDS 10 TO 15 MPH. .FRIDAY NIGHT AND SATURDAY...MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE MID 60S. MINIMUM RH 45 PERCENT. NORTHWEST WINDS 10 TO 15 MPH. .SATURDAY NIGHT AND SUNDAY...MOSTLY CLOUDY. LOWS IN THE UPPER 40S. HIGHS IN THE UPPER 60S. MINIMUM RH 53 PERCENT. SOUTH WINDS AROUND 5 MPH. .SUNDAY NIGHT AND MONDAY...MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS IN THE MID 50S. HIGHS AROUND 70. MINIMUM RH 63 PERCENT. SOUTH WINDS AROUND 5 MPH. .MONDAY NIGHT AND TUESDAY...MOSTLY CLOUDY. A CHANCE OF SHOWERS. LOWS IN THE MID 50S. HIGHS IN THE LOWER 70S. MINIMUM RH 62 PERCENT. SOUTH WINDS AROUND 5 MPH. $$ .OUTLOOK 8 TO 14 DAYS... TEMPERATURES ABOVE NORMAL. PRECIPITATION NEAR NORMAL. $$