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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
631 AM EDT Wed Aug 12 2026
VAZ024-122000-
RAWS 441631
37.63N 79.51W Elev. 865 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 86 69 94 71 92
TEMP 69 78 85 86 80 75 72 70 72 86 92 92 82 76 73 71 73 84 89 90 83
DEWPT 65 66 65 66 66 70 69 68 70 72 71 72 72 72 71 70 72 73 74 74 73
MAX/MIN RH 50 96 50 99 58
RH 87 67 51 51 62 84 90 93 93 63 51 52 72 87 93 97 97 70 61 60 72
WIND DIR W NW NW NW W SW W W W W W W W W N N W W W W NW
WIND SPD 2 3 3 3 2 1 1 1 1 3 4 4 2 1 0 0 1 2 4 4 1
CLOUDS B1 SC SC SC SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B2 B2 SC
CLOUDS(%) 69 44 37 49 39 48 50 44 29 30 58 59 53 63 57 59 62 63 71 71 48
VSBY 9 10 10 10 10 10 9 5 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 20 20 30 30 60
RAIN SHWRS SC SC SC IS IS IS IS NM NM IS
TSTMS SC IS SC SC
Obvis PF
MIX HGT <1 3 4 3 <1 <1 <1 <1 <1 3 5 4 <1 <1 <1 <1 <1 3 4 4 <1
T WIND DIR W NW NW N W W NW NW NW N SW SW W W W W NW NW NW NW NW
T WIND SPD 12 11 18 9 6 4 5 4 3 2 9 12 8 4 4 3 4 9 12 8 2
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 12 47102 40 3 2 3 2 3 9 53 65 4 2 2 2 5 32 48 29 1
MAX LVORI 5 1 1 1 3 6 6 8 6 3 1 1 3 6 6 8 7 3 1 2 3
STABILITY A A A A G F F F A A B B F F F F B B C C F
CEILING None None None None None None 4100 3200 2600 3600
STA PRES 28.46 28.41 28.42 28.42 28.46 28.42 28.46 28.50 28.55 28.55
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 69 90 69 94 72 94 68 90
TEMP 72 71 87 82 72 71 91 85 75 74 92 84 72 70 88 81
DEWPT 71 69 70 69 68 69 72 72 71 71 71 70 69 68 67 67
RH 97 93 57 65 87 93 54 65 87 90 51 63 90 93 50 63
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC SC SC SC SC B1 SC FW FW SC SC SC SC FW SC
POP 12HR 20 20 20 20 10 20 10 20
RAIN SHWRS IS IS IS IS IS IS IS
TSTMS IS 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