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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
131 PM EDT Fri Aug 21 2026
VAZ018-212000-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
131 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 83 63 79
TEMP 70 69 67 65 66 66 66 72 80 79 70 67 65 64 63 72 78 75 66
DEWPT 66 66 66 65 65 65 65 69 69 68 66 64 62 61 61 62 60 58 55
MAX/MIN RH 87 100 66 93 52
RH 87 90 97100 97 97 97 90 69 69 87 90 90 90 93 71 54 55 68
WIND DIR SE SE SE E N N N SE SE S NW W W W NW NW NW NW NW
WIND SPD 3 3 2 1 0 0 0 1 2 3 2 3 4 6 6 8 8 8 4
WIND GUST 17 21 24 23 20 21 17
CLOUDS B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 SC SC B1 FW FW FW FW FW CL
CLOUDS(%) 82 81 81 85 81 77 76 72 53 58 35 27 57 21 13 9 8 8 3
VSBY 7 7 6 4 4 5 4 9 10 10 10 8 10 10 10 10 10 10 10
POP 12HR 60 60 40 30 0
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 3 <1 <1 <1 <1 1 3 5 6 1
T WIND DIR E E E E E E E SE W S SE SW SW W W NW NW W W
T WIND SPD 8 5 4 4 5 4 3 2 3 4 3 3 2 6 14 19 19 14 13
DISPERSION VP VP VP VP VP VP VP PR VP
ADI 26 13 2 2 3 2 4 6 16 17 2 2 2 3 25 81119101 6
MAX LVORI 4 5 8 9 8 8 9 6 3 3 6 7 7 6 5 3 1 1 3
STABILITY B B F F F F B B B B G G E F B B B B F
CEILING 0 0 400 700 None None None None None
STA PRES 27.86 27.84 27.81 27.81 27.75 27.74 27.73 27.78 27.78
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 55 82 61 84 65 83
TEMP 59 58 78 65 57 57 81 68 62 63 83 71 67 66 82 70
DEWPT 54 55 56 53 52 53 59 59 57 58 66 65 64 65 69 67
RH 83 90 47 65 83 86 47 73 84 84 57 81 90 97 65 90
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS CL CL FW FW FW FW FW SC FW FW SC B1 B1 B1 B1 B1
POP 12HR 0 0 0 5 5 30 40 50
RAIN SHWRS SC SC SC SC SC
TSTMS SC IS 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