National Weather Service United States Department of Commerce

Print This Forecast (Printer-Friendly)

EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 AM EDT Thu Aug 20 2026

VAZ018-210800-
RAWS 444002
37.56N  80.18W Elev. 2702 ft
231 AM EDT Thu Aug 20 2026

Date           08/19/26      Thu 08/20/26            Fri 08/21/26            Sat
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                 66          84          65          79          65
TEMP                      68 69 81 83 82 74 70 68 67 67 73 78 75 70 68 68 67 67
DEWPT                     62 63 66 68 68 67 66 65 65 65 69 70 70 67 66 65 64 65
MIN/MAX RH                   90          61          95          76          95
RH                        81 81 60 61 63 79 87 90 93 93 87 76 84 90 93 90 90 93
WIND DIR                   N  W  W  W  W NW NW NE  E  E SE SE SE SE SE  N  W  W
WIND SPD                   0  2  4  6  5  3  1  1  1  1  2  3  2  1  1  0  1  1
WIND GUST                       14 18 17                                       
CLOUDS                    FW FW SC B1 B1 B1 B1 SC SC B1 B1 B1 OV OV OV B2 B1 B1
CLOUDS(%)                 11 25 32 62 65 57 51 46 49 60 60 68100 92 88 73 54 61
VSBY                      10 10 10  7  7  7  7  7 10 10  6  7  3  6  6  7  7 10
POP 12HR                      0          30          40          80          70
RAIN SHWRS                         IS IS IS SC IS       SC SC  O NM NM IS IS   
TSTMS                              IS IS IS IS          IS SC SC SC            
MIX HGT                   <1 <1  4  4  5 <1 <1 <1 <1 <1  2  3  2 <1 <1 <1 <1 <1
T WIND DIR                 N  S  W  W SW  W  N NE NE  E  E  E SE SE SE SE SE  E
T WIND SPD                 0  1 18 19 14  3  3  4  8  6  6  3  8  5  5  5  4  2
DISPERSION                VP             VP VP VP VP             VP VP VP VP   
ADI                        0  1 86 72 86  2  2  2  4  8 15 12 14  3  3  3  2  2
MAX LVORI                  6  5  1  1  1  4  6  6  6  6  4  4  4  6  6  6  6  8
STABILITY                  G  A  A  C  B  F  F  F  F  B  B  B  D  F  F  F  F  B
CEILING                    None  None  8200  None  None   100   100     0   500
STA PRES                  27.80 27.82 27.79 27.83 27.86 27.90 27.86 27.85 27.81


Date           08/22Sun 08/23/26Mon 08/24/26Tue 08/25/26Wed 08/26/26
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       84      63      80      58      81      58      83      63      85
TEMP          83 71 66 65 80 70 61 60 79 69 60 61 81 72 64 65 83 73
DEWPT         68 64 62 62 64 58 57 57 58 55 54 55 62 60 60 61 67 64
RH            61 79 87 90 58 66 87 90 49 61 81 81 53 66 87 87 59 73
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    SC SC SC FW SC SC CL FW FW FW FW FW FW SC FW SC SC B1
POP 12HR           10       5      10       5       5       0      10      10      30
RAIN SHWRS                                                       SC
TSTMS                                                            SC

$$


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