National Weather Service United States Department of Commerce

Fire Weather Forecast Banner for Botetourt County

Print This Forecast (Printer-Friendly)

FNUS51 KRNK 210220 AAB

Fire Weather Planning Forecast for SW VA...UPDATED
National Weather Service Blacksburg VA
1020 PM EDT Fri Oct 20 2017


...Dry weather through the weekend to give way to widespread
rainfall early next week... 

High pressure will continue to keep our weather pattern dry heading 
into and through the weekend. A potent cold front will approach and 
cross the region Monday into Tuesday, bringing a return of showers 
and gusty winds to the region. Drier weather returns to the area by 
the middle to end of next week.

Minimum relative humidity values will be in the 30 percent to 40 percent 
range, then steadily increase to well above 50 percent by Monday. Light
transport winds and a relatively shallow mixing height will create poor
dispersion and ventilation conditions into the weekend, but improving
conditions are expected as winds increase ahead of the approaching cold
front. Rainfall amounts of one half inch east of the Blue Ridge to two 
inches in the mountains are possible from Monday into Tuesday.

Including the city of Fincastle
1020 PM EDT Fri Oct 20 2017

                      Tonight      Sat          Sat Night    Sun          

Cloud cover           Clear        MClear       MClear       MClear       
Precip type           None         None         None         None         
Chance precip (%)     0            0            0            0            
Min/Max Temp          44           77           48           77           
Max/Min RH %          98           41           98           46           
Wnd20ft2min/Early(mph)Lgt/Var      Lgt/Var      SE  3        Lgt/Var      
Wnd20ft2min/Late(mph) Lgt/Var      SE  3        Lgt/Var      S  5         
Precip amount         0.00         0.00         0.00         0.00         
Precip duration                                                           
Precip begin                                                              
Precip end                                                                
Mixing hgt(ft-AGL)                 4170                      4100         
Transport wnd (mph)                S  7                      S  9         
Vent rate (mph-ft)                 29190                     36900        
Dispersion(evening)   VERY POOR                 VERY POOR                 
LAL                   1            1            1            1            
Haines Index          2            3            4            4            
ADI early             9 POOR       14 GEN POOR  17 GEN POOR  28 FAIR      
ADI late              1 VERY POOR  23 FAIR      1 VERY POOR  33 FAIR      
Max LVORI early       4            7            3            5            
Max LVORI late        5            2            4            1            


.SUNDAY NIGHT AND MONDAY...Mostly cloudy. A chance of showers.
Lows in the mid 50s. Highs in the lower 70s. Minimum RH
71 percent. South winds 5 to 10 mph. 
.MONDAY NIGHT AND TUESDAY...Showers. Lows in the mid 50s. Highs
in the upper 60s. Minimum RH 64 percent. Southwest winds 10 to
15 mph. 
.TUESDAY NIGHT AND WEDNESDAY...Partly cloudy. Lows in the lower
40s. Highs in the upper 50s. Minimum RH 46 percent. West winds
10 to 15 mph. 
.WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the mid
30s. Highs in the upper 50s. Minimum RH 45 percent. West winds
5 to 10 mph. 
.THURSDAY NIGHT AND FRIDAY...Mostly clear. Lows around 40. Highs
in the mid 60s. Minimum RH 45 percent. Southwest winds 5 to
10 mph.

Temperatures near normal.  Precipitation near normal.