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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
401 PM EDT Sat Aug 22 2026
VAZ012-230800-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
401 PM EDT Sat Aug 22 2026
Date 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue
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 58 78 53 79 52
TEMP 77 67 63 61 59 59 68 74 73 65 58 55 53 55 71 77 74 65 56 53 52 54
DEWPT 65 64 62 60 59 59 59 56 55 54 54 52 51 52 55 53 53 52 51 50 48 50
MIN/MAX RH 100 49 92 43 88
RH 67 90 97 97100100 73 53 53 68 86 90 93 90 57 43 48 63 83 89 86 86
WIND DIR W W W W W NW NW NW W W W W W W W W NW NW N N N N
WIND SPD 2 2 3 3 3 3 3 3 3 1 1 1 1 1 2 3 2 1 0 0 0 0
CLOUDS B1 B1 B1 SC SC SC SC FW SC FW FW FW FW FW FW FW FW FW SC SC FW SC
CLOUDS(%) 56 63 58 34 41 42 34 13 31 16 11 25 16 12 16 22 19 16 36 29 21 26
VSBY 10 10 8 7 6 4 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 30 0 0 0 0
RAIN SHWRS SC IS IS
TSTMS IS IS IS
MIX HGT 4 <1 <1 <1 <1 1 3 5 5 <1 <1 <1 <1 <1 4 5 6 <1
T WIND DIR W SW SW W NW NW NW NW NW W NW W W W W W W N
T WIND SPD 6 8 4 12 6 18 20 16 14 9 4 3 3 4 12 9 8 2
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 32 4 2 6 3 30 85104100 4 2 2 2 4 62 56 55 1
MAX LVORI 3 6 9 7 9 4 3 1 1 3 6 7 7 6 1 1 1 3
STABILITY B F F G F A A A A G G G G A A A A G
CEILING None None None None None None None None None
STA PRES 27.21 27.22 27.28 27.27 27.30 27.31 27.33 27.31
Date 08/25Wed 08/26/26Thu 08/27/26Fri 08/28/26Sat 08/29/26
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 82 56 86 61 83 60 84 60 85
TEMP 78 69 58 58 81 73 63 63 78 71 63 62 79 73 62 62 80 73
DEWPT 52 54 53 54 60 61 60 62 66 65 62 62 65 63 61 62 63 63
RH 40 59 83 86 49 66 90 97 67 81 97100 62 71 97100 56 71
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC FW FW FW SC B1 SC B1 B1 B1 SC SC SC B1 SC SC SC SC
POP 12HR 0 0 30 20 50 20 30 20 20
RAIN SHWRS SC IS SC SC IS IS SC IS IS IS IS
TSTMS SC IS SC IS 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