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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
401 PM EDT Wed Aug 12 2026
VAZ020-130800-
RAWS 441801
37.99N 79.76W Elev. 2160 ft
401 PM EDT Wed Aug 12 2026
Date 08/12/26 Thu 08/13/26 Fri 08/14/26 Sat
UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12
EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08
MIN/MAX TEMP 66 88 67 85 67
TEMP 84 78 72 70 68 69 79 84 86 76 72 71 69 70 77 82 81 75 73 70 68 69
DEWPT 64 66 67 66 66 67 68 67 67 70 68 68 67 68 70 71 71 70 69 68 67 68
MIN/MAX RH 99 53 98 69 98
RH 51 67 84 87 93 93 69 57 53 82 87 90 93 93 79 69 72 84 87 93 97 97
WIND DIR W W W W W W W W NW NW NW NW NW W W W W W NW N N N
WIND SPD 3 2 3 2 3 3 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1
CLOUDS SC B1 SC B1 B1 SC SC SC SC SC B1 SC SC B1 B2 B2 B2 B1 B1 B1 B1 B1
CLOUDS(%) 39 57 45 67 60 32 41 33 48 42 57 43 45 65 76 73 73 66 66 57 58 56
VSBY 10 10 9 5 6 5 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 40 20 40 60 50
RAIN SHWRS SC IS IS SC SC NM NM SC SC IS IS IS
TSTMS IS IS SC SC IS
Obvis PF PF PF
MIX HGT 5 <1 <1 <1 <1 <1 3 5 4 <1 <1 <1 <1 <1 2 4 3 <1
T WIND DIR NW W W W NW NW W W W NW NW N N N S W SW E
T WIND SPD 14 8 6 3 3 2 14 9 10 8 2 3 3 2 6 10 12 3
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 86 4 3 2 2 2 53 54 54 4 1 2 2 2 20 48 44 2
MAX LVORI 1 3 5 7 7 6 1 1 1 5 6 7 8 8 3 3 3 5
STABILITY A G F F F A A A A F F F F B B B B F
CEILING None None None None None 8800 1000 2200 2200
STA PRES 27.78 27.77 27.81 27.79 27.86 27.89 27.92 27.87
Date 08/15Sun 08/16/26Mon 08/17/26Tue 08/18/26Wed 08/19/26
UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20
MAX/MIN TEMP 84 68 87 69 88 66 86 65 86
TEMP 83 76 71 70 84 79 73 72 85 78 70 69 83 76 67 67 82 76
DEWPT 71 70 68 68 71 71 69 70 71 69 67 67 67 66 64 65 67 67
RH 67 82 90 93 65 77 87 93 63 74 90 93 59 71 90 93 61 74
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B1 B1 B1 B1 B1 SC SC SC SC SC SC SC SC SC SC SC SC
POP 12HR 50 30 30 20 20 10 20 20 20
RAIN SHWRS IS SC SC IS SC IS IS IS IS IS
TSTMS SC IS SC IS IS 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