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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
131 PM EDT Thu Aug 20 2026
VAZ012-202000-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
131 PM EDT Thu Aug 20 2026
Date Thu 08/20/26 Fri 08/21/26 Sat 08/22/26
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 62 83 60 81
TEMP 81 82 72 67 66 64 65 74 81 76 68 65 64 63 63 74 81 78 69
DEWPT 67 67 67 66 64 63 65 69 69 68 67 65 63 62 63 66 64 63 61
MAX/MIN RH 57 100 66 100 56
RH 63 61 84 97 93 97100 84 67 76 97100 97 97100 76 56 60 76
WIND DIR W W W NW N N SW S S S S N N N W W W W W
WIND SPD 3 3 2 1 0 0 1 1 2 2 1 0 0 0 1 2 2 2 2
CLOUDS B1 SC B1 B1 B1 B2 B1 B2 B2 B2 B2 B2 B1 B1 SC SC SC SC FW
CLOUDS(%) 67 45 53 66 68 72 63 71 77 80 70 78 63 61 44 46 31 32 20
VSBY 10 10 10 10 6 5 2 10 10 10 6 5 10 1 1 8 10 10 10
POP 12HR 20 40 70 40 10
RAIN SHWRS IS SC SC SC IS NM NM SC SC
TSTMS IS SC IS IS SC SC IS IS
MIX HGT 4 4 <1 <1 <1 <1 <1 2 3 2 <1 <1 <1 <1 <1 3 5 4 <1
T WIND DIR W W W N E E E SE S S SE E SE S S NW NW NW NW
T WIND SPD 13 13 2 2 2 2 3 9 8 11 11 6 3 4 4 12 11 10 10
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 63 77 1 1 1 1 4 24 33 32 5 3 2 2 4 44 71 54 5
MAX LVORI 1 1 5 8 8 8 9 4 3 3 7 9 10 9 9 3 1 1 4
STABILITY B A F F F F B B B B F F F F A A A A G
CEILING None 1800 100 100 1700 1500 100 None None
STA PRES 27.27 27.29 27.30 27.32 27.27 27.27 27.23 27.25 27.23
Date Sun 08/23/26Mon 08/24/26Tue 08/25/26Wed 08/26/26
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 58 78 53 79 52 82 57 86
TEMP 62 61 76 65 56 56 77 65 55 55 78 71 60 61 83 71
DEWPT 60 60 58 54 53 53 54 53 51 52 56 56 56 57 61 62
RH 93 97 54 68 90 90 45 65 86 90 47 59 87 87 47 73
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC SC FW FW FW FW FW FW SC SC SC SC SC SC B1
POP 12HR 10 5 5 5 5 10 10 40
RAIN SHWRS IS 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