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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
731 PM EDT Wed Sep 16 2026
VAZ012-170800-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
731 PM EDT Wed Sep 16 2026
Date 09/16/26 Thu 09/17/26 Fri 09/18/26 Sat
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 60 86 63 83 60
TEMP 73 66 64 62 63 80 83 82 72 67 66 64 65 78 83 80 71 66 65 63 62
DEWPT 64 63 61 60 61 66 67 68 68 67 65 64 65 69 68 68 67 66 64 63 62
MIN/MAX RH 95 54 100 61 100
RH 73 90 90 93 93 62 59 63 87100 97100100 74 61 67 87100 97100100
WIND DIR SE S W W NW NW NW NW NW W W W NW NW NW N N N E SE SE
WIND SPD 3 3 2 3 3 6 5 5 4 4 1 2 2 2 2 2 1 1 1 1 2
CLOUDS FW FW FW FW FW FW SC B2 SC SC SC SC SC B1 B2 B2 B1 B1 B1 B2 B1
CLOUDS(%) 22 12 14 13 10 16 38 75 39 46 28 46 28 67 76 76 61 58 66 75 69
VSBY 10 10 8 7 8 10 10 10 10 9 8 8 6 9 10 10 10
POP 12HR 5 30 10 60 5
RAIN SHWRS IS IS IS IS NM NM
TSTMS IS IS SC SC
MIX HGT <1 <1 <1 <1 <1 4 5 2 <1 <1 <1 <1 <1 3 4 3 <1
T WIND DIR SW W W W W NW NW NW NW W W W NW NW W NW NW
T WIND SPD 1 2 2 2 3 6 10 11 8 5 6 5 5 5 10 9 8
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 1 1 1 1 3 31 54 31 4 3 3 3 4 19 41 30 4
MAX LVORI 4 7 6 7 6 1 1 1 5 8 8 9 9 3 1 3 6
STABILITY G G G G A A B A F G G G C C C C F
CEILING None None None None None None 200 200 200
STA PRES 4.593 27.54 27.54 27.48 27.45 27.42 27.42 27.36
Date 09/19Sun 09/20/26Mon 09/21/26Tue 09/22/26Wed 09/23/26
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 79 59 82 59 80 59 76 57 72
TEMP 76 70 63 62 80 72 63 62 79 70 63 61 75 68 62 60 71 66
DEWPT 67 65 62 62 68 67 63 62 68 67 63 61 68 66 62 60 66 63
RH 74 84 97100 67 84100100 69 90100100 79 93100100 84 90
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B1 B1 B1 B1 B2 SC SC B1 B2 B2 B1 B1 B2 B2 B2 B2 B1
POP 12HR 30 10 60 20 70 20 60 40 40
RAIN SHWRS SC SC NM IS SC NM IS SC NM SC IS SC SC
TSTMS IS SC SC IS 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