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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
931 PM EDT Thu Sep 17 2026
VAZ012-180800-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
931 PM EDT Thu Sep 17 2026
Date 09/17/26 Fri 09/18/26 Sat 09/19/26 Sun
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 63 85 62 80 61
TEMP 66 65 64 64 78 83 82 71 66 65 64 64 71 77 80 71 64 63 62 63
DEWPT 63 64 63 64 68 67 67 68 66 65 64 64 67 67 67 67 64 63 62 63
MIN/MAX RH 100 54 100 64 100
RH 90 97 97100 71 59 61 90100100100100 87 71 65 87100100100100
WIND DIR NW NW NW W NW NW NW N N N N N SE SE SE SE SE S S S
WIND SPD 1 1 2 2 2 2 2 1 0 0 0 0 1 1 1 2 2 2 1 1
CLOUDS SC FW FW FW SC SC B1 SC B1 B1 B1 B2 B2 B1 B1 B1 B1 B1 B1 SC
CLOUDS(%) 35 16 15 19 39 46 61 50 51 64 56 77 71 66 66 56 66 67 58 50
VSBY 10 10 1 1 10 7 6 10 7 10 10 7 7 6 6 10
POP 12HR 10 40 20 50 5
RAIN SHWRS IS SC IS IS IS SC SC IS
TSTMS IS SC SC SC
Obvis PF PF
MIX HGT <1 <1 <1 <1 3 5 3 <1 <1 <1 <1 <1 2 4 3 <1
T WIND DIR W W W W NW NW NW NW W N E SE SE SW SE S
T WIND SPD 3 3 5 5 14 9 12 5 3 2 4 5 5 4 6 10
DISPERSION VP VP VP VP VP VP VP VP VP VP VP
ADI 2 2 3 6 59 51 40 3 2 1 2 4 15 17 24 5
MAX LVORI 7 8 8 8 3 1 1 6 10 10 9 9 5 3 2 5
STABILITY G G G B B B C F F F F C C C C F
CEILING None None None None 200 200 1700 900
STA PRES 27.42 27.40 27.33 27.35 27.34 27.35 27.31
Date 09/20Mon 09/21/26Tue 09/22/26Wed 09/23/26Thu 09/24/26
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 83 61 84 59 76 54 69 50 70
TEMP 83 71 63 63 79 71 62 61 71 66 58 55 64 61 54 51 64 60
DEWPT 67 67 63 63 67 67 62 61 67 64 58 55 63 60 54 51 60 59
RH 59 87100100 67 87100100 87 93100100 97 97100100 87 96
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC B2 B1 SC B1 B2 B1 B1 B1 B2 B2 B2 B2 B2 B1 B1 B1 B1
POP 12HR 60 30 80 40 70 50 40 20 20
RAIN SHWRS IS NM SC SC O SC IS SC NM SC IS SC SC IS IS IS IS
TSTMS SC IS 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