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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1231 PM EDT Fri Aug 21 2026
VAZ018-212000-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
1231 PM 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 80 65 82 63 79
TEMP 70 69 67 65 68 67 67 72 80 78 70 67 66 65 64 72 78 75 66
DEWPT 66 66 66 65 66 65 66 69 69 68 65 63 62 62 62 63 62 59 57
MAX/MIN RH 87 100 68 95 56
RH 87 90 97100 93 93 97 90 69 71 84 87 87 90 93 73 58 58 73
WIND DIR SE SE SE E N N N SE SE S NW W W W W NW NW NW NW
WIND SPD 3 3 2 1 0 0 0 1 2 3 2 3 4 5 8 8 8 8 5
WIND GUST 14 19 24 21 20 21 19
CLOUDS B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 SC SC FW FW FW FW FW FW CL
CLOUDS(%) 82 81 81 85 81 77 76 72 53 58 35 27 24 18 21 18 17 9 3
VSBY 7 7 6 4 4 5 4 9 10 10 10 8 0 1 10 10 10 10 10
POP 12HR 60 60 40 20 5
RAIN SHWRS NM SC SC SC IS IS SC SC IS
TSTMS IS IS SC IS IS SC SC IS
MIX HGT 3 2 <1 <1 <1 <1 <1 2 4 4 <1 <1 <1 <1 2 3 5 5 1
T WIND DIR E SE E E SE NE S SW W W S S W W W NW W W W
T WIND SPD 5 4 3 2 6 2 2 6 3 5 8 2 3 8 20 23 18 13 18
DISPERSION VP VP VP VP VP VP VP PR PR
ADI 23 14 2 1 3 1 2 17 15 28 4 1 2 4 47 95114 86 8
MAX LVORI 3 4 8 7 6 8 8 4 3 3 6 6 6 6 4 3 1 1 3
STABILITY B B F F F F B B B A G G F F B B B B F
CEILING 1300 1600 700 700 None None None None None
STA PRES 27.84 27.83 27.78 27.77 27.71 27.69 27.68 27.75 27.77
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 57 79 57 82 62 83 65 82
TEMP 59 59 78 68 59 59 79 71 64 63 82 73 68 67 80 72
DEWPT 55 55 57 55 53 54 60 60 58 60 67 66 64 65 70 67
RH 87 87 48 63 80 83 52 68 81 90 61 79 87 93 72 84
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS CL CL FW SC SC SC SC SC SC SC SC B1 B1 B1 B1 B1
POP 12HR 0 0 5 10 5 40 40 50
RAIN SHWRS SC SC SC SC SC
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