National Weather Service United States Department of Commerce

Print This Forecast (Printer-Friendly)

EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
901 PM EDT Tue Oct 20 2026

VAZ024-210800-
RAWS 441631
37.63N  79.51W Elev. 865 ft
901 PM EDT Tue Oct 20 2026

Date           10/20/26      Wed 10/21/26            Thu 10/22/26            Fri
UTC 3hrly     21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12
EDT 3hrly     17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08

MIN/MAX TEMP                 40          73          37          75          42
TEMP                54 50 48 40 59 67 71 59 51 47 44 42 60 72 74 63 54 50 47 46
DEWPT               39 38 37 37 39 40 39 38 38 38 36 34 36 36 38 38 38 39 39 40
MIN/MAX RH                   90          30          75          24          79
RH                  57 63 65 89 47 37 31 45 61 71 73 73 41 27 27 39 54 66 74 79
WIND DIR             N  N  N  N  N  N  N  N  N NW NW NW NW  N  N  N  N  N  N  N
WIND SPD             3  3  3  3  5  5  4  3  2  2  2  1  2  2  1  2  2  1  2  2
CLOUDS              CL CL CL CL CL CL CL CL CL CL CL CL FW CL CL CL CL FW FW FW
CLOUDS(%)            2  1  2  1  1  3  3  4  4  3  3  4  6  1  0  1  2 11 12  7
VSBY                10 10 10 10 10 10 10 10 10  6 10  3  2 10 10 10 10 10 10   
POP 12HR                      0           0           0           0           0
MIX HGT             <1 <1 <1 <1  2  3  2 <1 <1 <1 <1 <1  1  3  3 <1            
T WIND DIR          NW NW NW NW NW NW NW NW NW NW NW NW NW  N  N  N            
T WIND SPD           4  4  4  4  4  4  4  4  4  4  4  6  5  5  9  4            
DISPERSION          VP VP VP             VP VP VP VP             VP VP VP VP   
ADI                  2  2  2  5 12 18 11  2  2  2  2  7 11 23 34  2            
MAX LVORI            3  4  6  6  2  2  2  2  3  3  3  3  2  2  1  2            
STABILITY            G  G  G  B  B  B  A  G  G  G  G  A  B  B  A  G            
CEILING                    None  None  None  None  None  None  None  None      
STA PRES                  28.71 28.68 28.60 28.60 28.58 28.62 28.60            


Date           10/23Sat 10/24/26Sun 10/25/26Mon 10/26/26Tue 10/27/26
UTC 6hrly     18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
EDT 6hrly     14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20

MAX/MIN TEMP       67      37      63      39      68      41      74      46      72
TEMP          66 53 42 38 62 53 42 40 65 57 45 42 71 62 49 47 70 58
DEWPT         40 46 41 38 41 45 42 39 45 49 45 42 47 52 49 47 52 51
RH            38 77 96100 46 74100 96 48 75100100 42 70100100 53 77
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    FW CL CL CL CL CL CL FW FW FW FW FW FW FW SC SC SC SC
POP 12HR            0       0       0       0       0       0       0       0       0

$$


This product is for planning and review purposes only and is not
to be substituted for an official fire weather spot forecast. The
data displayed are calculated from a 2.5 by 2.5 km digital
database and only approximates weather conditions in highly
varying terrain. Please relay any comments you have to the NWS via
email at rnk.webmaster@noaa.gov.

Below is a weather element key for this product.
(Note...winds do not reflect local terrain effects.)

DAY 1 THROUGH 3...
MAX/MIN TEMP OR MIN/MAX TEMP(F).....Maximum/Minimum air temperature
TEMP(F).............................Air temperature
DEWPT(F)............................Dew point temperature
MIN/MAX RH OR MAX/MIN RH(%).........Maximum/Minimum humdity
RH(%)...............................Relative humidity
WIND DIR(8 POINT COMPASS)...........Wind direction
WIND SPD(MPH).......................Wind speed
CLOUDS(CATEGORY)....................Cloud cover category
     EXAMPLE: CL = CLEAR; FW = FEW; SC = Scattered; BK = Broken; OV = Overcast
CLOUDS(%)...........................Cloud cover as a percentage
VSBY................................Visibility value in statute miles
POP 12HR(%).........................Probability for accumulating precipitation
WEATHER...
   TYPE...
       RAIN...........Rain
       RAIN SHWRS.....Rain showers
       TSTMS..........Thunderstorms
       DRIZZLE........Drizzle
       SNOW...........Snow
       SNOWSHWRS......Snow showers
       SLEET..........Sleet
       FRZG RAIN......Freezing rain
       FRZG DRZL......Freezing drizzle
   COVERAGE...
       IS.............Isolated
       SC.............Scattered
       NM.............Numerous
       O..............Occasional
       S..............Slight chance
       C..............Chance
       L..............Likely
       WD.............Widespread
       D..............Definite
       AR.............Areas
       PA.............Patchy

MIX HGT(THOUSANDS OF FT AGL)........Mixing height
     Example: 6 = 6000 feet; 12 = 12000 feet; <1 = Less than 1000 foot
t WIND DIR(8 POINT COMPASS).........Transport Wind direction
T WIND SPD(MPH).....................Transport Wind speed
DISPERSION(CATEGORY)................Smoke Dispersion category
     Values: vp =Very Poor;PR = Poor; FR = Fair; GD = Good;
ADI (INDEX).........................Atmospheric Dispersion Index
MAX LVORI (INDEX)...................Low Visibility Occurrence Risk Index
STABILITY (CATEGORY)................Pasquill Turner Stability
CEILING (FT)........................Ceiling
STA PRES (INCHES MERCURY)...........Station pressure

Day 4 Through 7...
MAX/MIN TEMP OR MIN/MAX TEMP(F).....Maximum/Minimum air temperature
TEMP(F).............................Air temperature
DEWPT(F)............................Dew Point temperature
RH(%)...............................Relative Humidity
WIND SPD(MPH).......................Wind Speed
     Example: <15 = less than 15 MPH; 15> = 15 MPH or greater
AVE CLOUDS(CATEGORY)................Average Cloud Cover Category
POP 12HR(%).........................Probability for accumulating precipitation
WEATHER.............................See Day 1 through 3 weather descriptions