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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Fri Aug 21 2026
VAZ012-212000-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
801 AM EDT Fri Aug 21 2026
Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26
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 81 61 81 58 77
TEMP 73 79 73 67 65 64 63 63 71 77 76 68 63 61 59 61 70 75 72 64
DEWPT 67 68 68 66 65 63 63 63 67 65 65 63 62 61 59 60 61 57 56 55
MAX/MIN RH 70 100 60 100 52
RH 81 69 84 97100 97100100 87 67 69 84 97100100 97 73 54 57 73
WIND DIR SE S S SE SE N N SW W NW W W W W W W NW NW NW NW
WIND SPD 1 2 1 1 1 0 0 1 1 2 2 2 2 2 3 3 3 3 3 2
CLOUDS B2 B2 B2 B2 B2 B2 B2 B1 SC SC SC SC SC SC SC SC SC FW FW CL
CLOUDS(%) 74 76 86 73 80 76 77 61 41 43 33 35 35 29 50 45 30 15 15 2
VSBY 10 10 10 10 6 2 3 2 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 80 60 40 20 5
RAIN SHWRS IS NM O NM SC IS IS
TSTMS IS NM NM SC SC IS
MIX HGT 2 3 2 <1 <1 <1 <1 <1 2 4 3 <1 <1 <1 <1 1 3 5 6 <1
T WIND DIR SE S SE SE SE SE S SW W NW W W SW W W W NW NW W NW
T WIND SPD 4 10 9 6 6 6 6 4 5 8 6 6 6 6 8 13 18 16 12 8
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 12 40 24 3 3 3 3 5 18 42 26 3 3 3 4 22 81 98 89 4
MAX LVORI 4 3 4 8 9 9 9 9 4 1 3 6 8 9 9 5 3 1 1 3
STABILITY B B B F F F F B A A A G G G F A A A A G
CEILING 200 100 100 100 None None None None None None
STA PRES 27.31 27.28 27.28 27.24 27.23 27.20 27.18 27.18 27.25 27.26
Date Mon 08/24/26Tue 08/25/26Wed 08/26/26Thu 08/27/26
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 53 78 53 80 58 83 61 81
TEMP 55 55 76 66 56 56 76 70 60 60 78 71 63 63 77 70
DEWPT 53 53 54 54 52 53 57 58 56 58 63 64 63 63 67 66
RH 93 93 46 65 86 90 52 66 87 93 60 79100100 71 87
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW SC SC SC SC SC SC SC SC B1 B1 B1 B1 B2
POP 12HR 0 5 5 10 10 40 40 60
RAIN SHWRS SC SC SC SC NM
TSTMS SC 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