National Weather Service United States Department of Commerce

Print This Forecast (Printer-Friendly)

EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1231 PM EDT Fri Aug 21 2026

NCZ003-212000-
RAWS 310302
36.35N  80.48W Elev. 1076 ft
1231 PM EDT Fri Aug 21 2026

Date             Fri 08/21/26            Sat 08/22/26            Sun 08/23/26
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                 83          67          83          65          83
TEMP                   75 75 73 70 69 68 68 74 80 81 74 70 67 66 67 76 82 80 72
DEWPT                  68 70 69 69 69 68 68 70 70 70 69 68 66 65 65 64 60 59 59
MAX/MIN RH                   81         100          68          98          46
RH                     79 84 87 97100100100 87 72 69 84 93 97 97 93 66 47 49 64
WIND DIR                E  E  E  E  S  S SE SW SW SW SW  W  W NW NW NW NW NW NW
WIND SPD                4  3  3  3  2  2  2  2  2  3  1  2  3  4  5  5  6  5  4
CLOUDS                 OV B1 OV B2 B2 OV B2 B1 FW SC SC FW FW SC FW CL FW FW CL
CLOUDS(%)              94 63 88 80 82 89 71 53 25 30 46 12 14 32 10  4 11  9  2
VSBY                    8  8  8  7  7  7  7 10 10 10 10 10 10  0 10 10 10 10 10
POP 12HR                     90          70          30          20           5
RAIN SHWRS             IS SC SC NM IS                                          
TSTMS                  IS IS SC SC                                             
MIX HGT                 4  3 <1 <1 <1 <1 <1  2  3  3 <1 <1 <1 <1 <1  3  6  6 <1
T WIND DIR             NE  E NE NE NE SE SE  S SW SW SW SW  W  W NW NW NW NW NW
T WIND SPD              5  8  5  6  4  1  2  4  5  4  2  1  2  2  2 12 10  9  5
DISPERSION                   VP VP VP VP             VP VP VP VP             VP
ADI                    20 28  3  3  2  1  2 10 22 19  1  1  1  1  2 56 68 71  3
MAX LVORI               3  3  8  9  9 10  9  5  3  3  6  8  8  8  6  1  1  1  3
STABILITY               C  B  F  F  F  F  B  B  A  A  F  G  G  F  A  A  B  A  F
CEILING                    1000  1300  5000  None  None  None  None  None  None
STA PRES                  28.97 28.96 28.93 28.92 28.86 28.85 28.84 28.91 28.91


Date          Mon 08/24/26Tue 08/25/26Wed 08/26/26Thu 08/27/26
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       60      83      60      81      64      85      66      82
TEMP          62 61 79 73 63 62 79 74 65 66 81 76 68 67 79 73
DEWPT         56 57 58 60 57 57 62 63 63 64 68 69 68 67 71 70
RH            81 87 49 64 81 84 56 69 93 93 65 79100100 77 90
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    FW FW FW SC SC SC SC SC SC SC SC B1 B1 B1 B1 B2
POP 12HR            0       5       5      10       5      30      50      60
RAIN SHWRS                                     SC SC SC IS NM
TSTMS                                          SC IS       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