EXPERIMENTAL...FIRE WEATHER PLANNING FORECAST FOR VA NATL FORESTS
NATIONAL WEATHER SERVICE BLACKSBURG VA
446 AM EDT Thu May 23 2013

.DISCUSSION...

SHOWERS WILL PASS ACROSS THE AREA THIS MORNING...WITH SOME 
OF THESE SHOWERS DEVELOPING INTO THUNDERSTORMS WITH AFTERNOON 
HEATING. AFTERNOON RH VALUES WILL REMAIN ABOVE 50 PERCENT FOR 
MOST LOCATIONS. A COLD FRONT WILL PASS ACROSS THE REGION LATE 
THIS EVENING...WHICH WILL BRING SIGNIFICANTLY COOLER AIR INTO 
THE AREA FOR THE WEEKEND. 

HIGH PRESSURE WILL BUILD INTO THE AREA FRIDAY MORNING AND 
AFTERNOON ON AN 8 MB PRESSURE GRADIENT...WHICH WILL RESULT 
IN NORTHWEST WIND GUSTS RANGING FROM AROUND 30 MPH FOR MOST 
LOCATIONS TO AS HIGH AS 45 MPH ACROSS THE HIGHER RIDGELINES 
ON FRIDAY AFTERNOON.

VAZ007-009>015-232100-
JEFFERSON NATIONAL FOREST SOUTH ZONE-
INCLUDING...BLACKSBURG...WYTHE...MT ROGERS
446 AM EDT THU MAY 23 2013

                      TODAY        TONIGHT      FRI          

CLOUD COVER           PCLDY        CLOUDY       PCLDY        
PRECIP TYPE           TSTMS        SHOWERS      SHOWERS      
CHANCE PRECIP (%)     80           40           30           
MAX/MIN TEMP          78           47           62           
MIN/MAX RH %          47           92           33           
WND20FT2MIN/EARLY(MPH)LGT/VAR      W  7         NW 12G28     
WND20FT2MIN/LATE(MPH) W  7         NW  8G21     NW 15G31     
PRECIP AMOUNT         0.22         0.08         0.02         
PRECIP DURATION       7            2            2            
PRECIP BEGIN          6 AM         CONTINUING   CONTINUING   
PRECIP END            CONTINUING   CONTINUING   4 PM         
MIXING HGT(FT-AGL)    7010                      5290         
TRANSPORT WND (MPH)   W 16                      NW 33        
VENT RATE (MPH-FT)    112160                    174570       
DISPERSION (EVENING)               POOR                      
LAL                   4            3            1            
HAINES INDEX          4            3            2            
ADI EARLY             32 FAIR      47 GEN GOOD  95 GOOD      
ADI LATE              69 GOOD      32 FAIR      96 GOOD      
MAX LVORI EARLY       5            3            4            
MAX LVORI LATE        2            4            1            

REMARKS...NONE.

.FORECAST FOR DAYS 3 THROUGH 7...
.FRIDAY NIGHT AND SATURDAY...BREEZY. MOSTLY CLEAR. LOWS IN THE
UPPER 30S. HIGHS IN THE LOWER 60S. MINIMUM RH 32 PERCENT.
NORTHWEST WINDS 20 TO 25 MPH. 
.SATURDAY NIGHT AND SUNDAY...PARTLY CLOUDY. LOWS IN THE LOWER
40S. HIGHS IN THE MID 60S. MINIMUM RH 41 PERCENT. NORTHWEST WINDS
5 TO 10 MPH. 
.SUNDAY NIGHT AND MONDAY...MOSTLY CLOUDY WITH A CHANCE OF
SHOWERS. LOWS IN THE UPPER 40S. HIGHS IN THE UPPER 60S. MINIMUM
RH 60 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
57 PERCENT. SOUTH WINDS AROUND 5 MPH. 
.TUESDAY NIGHT AND WEDNESDAY...MOSTLY CLOUDY. LOWS IN THE MID
50S. HIGHS IN THE MID 70S. MINIMUM RH 53 PERCENT. SOUTHWEST WINDS
AROUND 5 MPH. 

$$

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

$$