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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Thu Sep 17 2026
VAZ012-172000-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
801 AM EDT Thu Sep 17 2026
Date Thu 09/17/26 Fri 09/18/26 Sat 09/19/26
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 83 65 81 62 81
TEMP 80 82 80 72 68 67 67 68 76 80 78 71 66 65 64 63 70 76 79 71
DEWPT 67 66 67 67 66 65 65 66 68 67 68 67 66 65 64 63 66 67 67 66
MAX/MIN RH 58 98 66 100 66
RH 65 58 65 84 93 93 93 93 76 65 71 87100100100100 87 74 67 84
WIND DIR NW NW NW NW W W W NW NW NW NW NW N N N SE SE SE SE SE
WIND SPD 2 2 2 1 1 2 2 2 2 2 2 1 0 0 0 1 1 2 1 2
CLOUDS FW SC B2 SC SC SC SC SC SC B1 B1 SC SC SC B1 B2 B2 B2 B2 SC
CLOUDS(%) 7 47 73 47 47 26 45 35 48 61 56 30 43 50 67 71 79 70 70 47
VSBY 10 10 10 10 9 6 8 9 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 30 20 50 10 60
RAIN SHWRS IS IS IS SC SC IS IS NM NM
TSTMS IS IS IS SC SC IS IS
MIX HGT 4 5 2 <1 <1 <1 <1 <1 3 5 3 <1 1 <1 <1 <1 2 3 3 <1
T WIND DIR NW N NW W W W W NW NW NW NW NW N N E SE SE S S S
T WIND SPD 8 6 3 5 6 6 6 9 14 14 11 10 6 3 4 8 9 6 6 9
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 35 41 10 3 3 3 3 10 55 62 37 5 3 2 2 6 22 23 20 4
MAX LVORI 1 1 3 5 6 6 6 6 3 1 3 5 9 10 9 8 4 3 3 5
STABILITY B B C F F G F B B C C G F F F C C C C F
CEILING None None None None None None None 200 200 1400
STA PRES 27.53 27.47 27.46 27.41 27.42 27.36 27.35 27.32 27.35 27.30
Date Sun 09/20/26Mon 09/21/26Tue 09/22/26Wed 09/23/26
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 60 85 61 84 59 77 57 73
TEMP 63 62 83 72 64 63 80 71 63 61 72 67 61 58 68 65
DEWPT 62 62 68 67 63 63 67 67 63 61 67 65 60 58 64 62
RH 97100 61 84 97100 65 87100100 84 93 97100 87 90
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC SC B1 SC SC B1 B2 B2 B1 B2 B2 B1 B2 B2 B2
POP 12HR 5 50 10 80 40 60 40 30
RAIN SHWRS SC SC O SC SC NM SC SC SC
TSTMS SC 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