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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
831 AM EDT Wed Sep 16 2026
VAZ012-162000-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
831 AM EDT Wed Sep 16 2026
Date Wed 09/16/26 Thu 09/17/26 Fri 09/18/26
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 89 59 88 63 85
TEMP 79 85 85 73 67 64 62 63 80 84 83 72 67 66 64 65 78 83 80 71
DEWPT 66 65 64 65 63 61 59 60 67 67 67 67 66 64 63 64 69 69 69 67
MAX/MIN RH 46 93 53 100 62
RH 64 51 50 76 87 90 90 90 65 57 59 84 97 93 97 97 74 63 69 87
WIND DIR N N N SE N N W NW NW NW NW W W W W W NW NW NW N
WIND SPD 1 2 1 1 0 0 1 1 1 2 2 1 1 1 2 2 2 2 2 1
CLOUDS FW SC FW SC FW FW FW FW FW B1 B1 SC SC SC SC B1 B1 B2 B2 SC
CLOUDS(%) 24 27 25 38 7 25 20 13 25 59 64 50 38 28 30 51 53 73 73 49
VSBY 10 10 10 10 10 7 3 4 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 5 5 30 10 60
RAIN SHWRS SC SC SC NM NM
TSTMS SC SC SC
MIX HGT 3 6 5 <1 <1 <1 <1 <1 4 5 3 <1 <1 <1 <1 <1 3 4 3 <1
T WIND DIR NW NE NE SE S SW W W W NW NW SW N W W NW NW N N N
T WIND SPD 9 9 5 4 2 2 2 2 5 8 10 5 3 5 5 10 11 12 12 5
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 36 61 35 2 1 1 1 2 27 34 32 3 2 3 3 8 38 48 41 3
MAX LVORI 3 1 1 4 6 7 7 6 3 1 1 5 7 8 9 6 3 1 1 6
STABILITY A B A G G G G A A C C F G G G C C C C F
CEILING None None None None None None None None 300 2300
STA PRES 27.60 27.55 27.55 27.52 27.51 27.43 27.42 27.39 27.41 27.39
Date Sat 09/19/26Sun 09/20/26Mon 09/21/26Tue 09/22/26
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 61 81 59 84 60 83 59 79
TEMP 65 62 77 71 63 62 80 72 64 62 79 70 63 61 75 68
DEWPT 64 61 67 65 62 62 67 67 63 62 67 66 63 61 67 65
RH 97 97 71 81 97100 65 84 97100 67 87100100 76 90
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B1 B1 B1 B1 B1 B1 B2 B1 SC B1 B2 B1 B1 B2 B2
POP 12HR 10 40 20 60 20 60 40 60
RAIN SHWRS SC IS SC NM IS SC NM SC SC NM
TSTMS IS 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