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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
901 AM EDT Thu Aug 13 2026
VAZ012-132000-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
901 AM EDT Thu Aug 13 2026
Date Thu 08/13/26 Fri 08/14/26 Sat 08/15/26
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 86 66 87 67 87
TEMP 76 82 82 74 69 68 67 68 77 82 85 77 70 69 68 69 77 82 85 77
DEWPT 70 70 70 69 67 67 66 68 72 71 71 70 68 68 67 68 72 72 72 70
MAX/MIN RH 63 100 64 99 65
RH 82 67 67 84 93 97 97100 85 69 63 79 93 97 97 97 85 72 65 79
WIND DIR W W W NW NW SW W W W W W W W W W W W W W SW
WIND SPD 4 3 3 2 1 1 1 2 2 2 2 1 1 1 1 1 1 2 1 1
CLOUDS B1 B1 B1 SC SC B1 B1 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B2 B2 SC
CLOUDS(%) 59 58 59 34 50 54 60 79 82 76 54 57 57 51 51 65 65 80 80 43
VSBY 10 10 10 10 9 8 6 6 10 10 10 10 10 10 10 9 10 3 6 10
POP 12HR 30 20 60 40 70
RAIN SHWRS IS NM SC SC SC SC SC SC SC NM NM IS
TSTMS IS IS IS SC IS SC SC IS
MIX HGT 2 4 3 <1 <1 <1 <1 <1 2 4 3 <1 <1 <1 <1 <1 2 3 3 <1
T WIND DIR W W W W SW SW W W W W W W W NW NW NW NW NW W W
T WIND SPD 6 14 14 6 4 6 5 6 11 18 18 10 8 6 4 6 6 5 10 4
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 19 73 62 3 2 3 3 7 32 86 66 5 4 3 2 8 20 21 36 2
MAX LVORI 3 1 1 5 6 8 8 8 4 3 1 4 6 8 8 8 4 3 3 4
STABILITY B B B G F F F B B B B F F F F B B B B F
CEILING None None 100 200 2600 None None 700 2400
STA PRES 27.25 27.28 27.31 27.34 27.31 27.34 27.37 27.43 27.43
Date Sun 08/16/26Mon 08/17/26Tue 08/18/26Wed 08/19/26
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 90 69 88 65 85 62 86
TEMP 68 68 85 79 71 70 84 76 67 66 80 75 65 64 81 76
DEWPT 67 68 71 70 68 68 70 69 66 66 68 67 63 64 66 66
RH 97100 63 74 90 93 63 79 97100 67 76 93100 60 71
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC B1 SC B1 SC FW SC B1 B1 B1 B1 B1 SC SC SC SC
POP 12HR 20 40 20 50 40 40 10 20
RAIN SHWRS IS SC IS SC SC IS SC IS IS
TSTMS IS SC IS 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