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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