Grayson County Requested Product
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FNUS51 KRNK 041948
FWFRNK

FIRE WEATHER PLANNING FORECAST FOR SW VA...SE WV AND NW NC
NATIONAL WEATHER SERVICE BLACKSBURG VA
348 PM EDT TUE AUG 4 2015

.DISCUSSION...
A WEAK COLD FRONT WILL STALL ACROSS THE CAROLINAS WEDNESDAY. 
THIS WILL BRING A CHANCE OF SHOWERS AND THUNDERSTORMS TO THE 
REGION THROUGH MIDWEEK. AN AREA OF LOW PRESSURE IS EXPECTED 
TO FORM ALONG THE FRONT THURSDAY AND MOVE NORTHEAST ACROSS 
THE MID ATLANTIC REGION FRIDAY...WITH A MUCH BETTER CHANCE 
WIDESPREAD WETTING RAINFALL ON THURSDAY AND FRIDAY.

MINIMUM RELATIVE HUMIDITY VALUES WILL INCREASE TO GREATER THAN 
50 PERCENT AREAWIDE BY THURSDAY. VENTILATION RATES AND DISPERSION
WILL BE GOOD THROUGH TOMORROW WITH A TYPICAL DIURNAL BIAS...BUT 
MIXING HEIGHTS WILL BE LOWERING BY THURSDAY.

&&

VAZ015-050930-
GRAYSON-
INCLUDING THE CITIES OF...INDEPENDENCE...WHITETOP...TROUTDALE...
VOLNEY
348 PM EDT TUE AUG 4 2015

                      TONIGHT      WED          WED NIGHT    THU          

CLOUD COVER           MCLEAR       PCLDY        PCLDY        MCLDY        
PRECIP TYPE           TSTMS        TSTMS        TSTMS        TSTMS        
CHANCE PRECIP (%)     40           40           30           60           
MIN/MAX TEMP          63           85           62           81           
MAX/MIN RH %          95           50           99           61           
WND20FT2MIN/EARLY(MPH)NW  6        W  4         NW  3        SE  3        
WND20FT2MIN/LATE(MPH) NW  4        W  5         LGT/VAR      SW  5        
PRECIP AMOUNT         0.02         0.05         0.06         0.25         
PRECIP DURATION       1            1            2            5            
PRECIP BEGIN          6 PM         12 PM        CONTINUING   CONTINUING   
PRECIP END            10 PM        CONTINUING   CONTINUING   CONTINUING   
MIXING HGT(FT-AGL)                 6540                      5480         
TRANSPORT WND (MPH)                NW  9                     SW 16        
VENT RATE (MPH-FT)                 58860                     87680        
DISPERSION (EVENING)  POOR                      VERY POOR                 
LAL                   3            3            3            4            
HAINES INDEX          4            3            5            4            
ADI EARLY             50 GEN GOOD  33 FAIR      17 GEN POOR  21 FAIR      
ADI LATE              4 VERY POOR  40 FAIR      2 VERY POOR  48 GEN GOOD  
MAX LVORI EARLY       3            6            4            7            
MAX LVORI LATE        5            2            6            3            

REMARKS...NONE.

.FORECAST FOR DAYS 3 THROUGH 7...
.THURSDAY NIGHT AND FRIDAY...CLOUDY WITH SHOWERS LIKELY AND A
CHANCE OF THUNDERSTORMS. LOWS IN THE LOWER 60S. HIGHS IN THE MID
70S. MINIMUM RH 69 PERCENT. WEST WINDS 10 TO 15 MPH. 
.FRIDAY NIGHT AND SATURDAY...PARTLY CLOUDY. A CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE LOWER 60S. HIGHS IN THE MID 70S.
MINIMUM RH 62 PERCENT. NORTHWEST WINDS AROUND 5 MPH. 
.SATURDAY NIGHT AND SUNDAY...PARTLY CLOUDY. LOWS AROUND 60. HIGHS
IN THE UPPER 70S. MINIMUM RH 56 PERCENT. NORTHWEST WINDS AROUND
5 MPH. 
.SUNDAY NIGHT AND MONDAY...MOSTLY CLOUDY. A CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 60S. HIGHS IN THE UPPER 70S.
MINIMUM RH 60 PERCENT. SOUTH WINDS AROUND 5 MPH. 
.MONDAY NIGHT AND TUESDAY...MOSTLY CLOUDY. A CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE MID 60S. HIGHS IN THE UPPER 70S.
MINIMUM RH 57 PERCENT. WEST WINDS 5 TO 10 MPH.

.OUTLOOK 8 TO 14 DAYS...
TEMPERATURES NEAR NORMAL.  PRECIPITATION NEAR NORMAL.


 

Site specific forecasts for wildfires and prescribed burns may be obtained by contacting the National Weather Service in Blacksburg, VA at (540) 552-0084 or by submitting a Spot Request over the Internet.

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