National Weather Service United States Department of Commerce

Print This Forecast (Printer-Friendly)

EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
631 AM EDT Wed Aug 12 2026

VAZ012-122000-
RAWS 447502
37.01N  81.18W Elev. 2540 ft
631 AM EDT Wed Aug 12 2026

Date             Wed 08/12/26            Thu 08/13/26            Fri 08/14/26
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00
EDT 3hrly     05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20

MAX/MIN TEMP                 79          66          87          67          87
TEMP             64 71 78 79 73 68 68 67 67 77 83 82 75 70 69 68 69 79 85 82 76
DEWPT            62 66 66 64 64 67 66 66 67 71 70 70 70 68 67 67 68 72 72 71 70
MAX/MIN RH                   60         100          62         100          64
RH               93 84 67 60 73 97 93 97100 82 65 67 84 93 93 97 97 79 65 69 82
WIND DIR          W  W NW NW NW NW  W  W  W  W  W  W  W  W  W  W  W  W  W  W NW
WIND SPD          4  4  3  3  2  3  3  3  3  3  3  2  2  2  2  3  3  3  3  3  2
CLOUDS           B1 B2 SC SC B1 B1 SC SC B1 B1 B1 B1 SC B1 SC B1 B1 B1 B2 B2 B1
CLOUDS(%)        56 76 50 48 57 56 27 50 63 65 60 57 38 65 45 66 65 68 76 76 60
VSBY              8 10 10 10 10 10 10  7  7 10 10 10 10 10 10  7  7 10 10 10 10
POP 12HR                     20          30          40          20          60
RAIN SHWRS                   SC SC IS             SC IS IS       SC SC NM NM SC
TSTMS                        IS IS                SC IS IS          IS SC SC   
Obvis            PF                                                            
MIX HGT          <1  2  3  3 <1 <1 <1 <1 <1  2  3  3 <1 <1 <1 <1  1  3  4  4 <1
T WIND DIR       NW SW NW  W  W SW  W SW  W  W  W SW  W  W  W  W  W NW NW NW  W
T WIND SPD        5  5 12  8  3  3  2  4  6  9  8 11  9  5 11  5  9 16 13 10  6
DISPERSION                   VP VP VP VP             VP VP VP VP             VP
ADI               4 14 47 32  2  2  1  2  7 29 33 37  4  3  5  3 13 58 67 46  3
MAX LVORI         7  4  1  1  4  7  8  8  8  3  3  3  5  6  7  8  5  3  1  1  5
STABILITY         C  C  A  A  F  F  G  F  B  B  B  B  G  F  F  F  B  B  B  B  F
CEILING               600  None  None  None   500  None  None   100   200  4400
STA PRES            27.27 27.20 27.22 27.21 27.26 27.23 27.26 27.30 27.35 27.35


Date          Sat 08/15/26Sun 08/16/26Mon 08/17/26Tue 08/18/26
UTC 6hrly     06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
EDT 6hrly     02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20

MIN/MAX TEMP       67      87      67      90      69      88      64      83
TEMP          70 68 82 78 68 68 85 80 71 69 83 77 67 66 79 74
DEWPT         68 68 70 69 66 67 70 70 67 68 69 68 65 66 67 65
RH            93100 67 74 93 97 61 72 87 97 63 74 93100 67 74
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    B1 B1 B1 B2 SC SC B1 B1 FW FW SC B1 SC SC SC B1
POP 12HR           30      60      10      30      10      50      20      30
RAIN SHWRS    SC    SC NM          SC          SC IS    IS SC
TSTMS                  SC          SC          SC          IS

$$


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