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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
131 PM EDT Sun Sep 20 2026
VAZ012-202000-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
131 PM EDT Sun Sep 20 2026
Date Sun 09/20/26 Mon 09/21/26 Tue 09/22/26
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 62 83 59 75
TEMP 80 82 74 69 67 65 65 75 80 81 68 64 63 62 60 68 73 70 64
DEWPT 67 65 64 64 62 61 62 67 66 66 67 64 63 61 60 67 67 67 64
MAX/MIN RH 58 96 59 100 81
RH 65 56 71 84 84 87 90 76 62 60 97100100 97100 97 81 90100
WIND DIR W W W W W W W W SW SW SE SE SE SE SE SE SE E E
WIND SPD 4 2 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 2
CLOUDS B2 SC SC SC SC FW SC SC B2 B2 B2 B2 B2 B2 B2 B2 OV OV B2
CLOUDS(%) 70 38 31 44 33 25 26 33 73 77 84 84 77 76 77 81 94 94 86
VSBY 10 10 10 10 7 4 5 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 40 10 80 80 90
RAIN SHWRS SC IS NM NM O O SC SC NM NM O O O
TSTMS SC IS SC SC SC IS IS SC SC
Obvis PF PF
MIX HGT 4 2 <1 <1 <1 <1 <1 2 5 2 <1 <1 <1 <1 <1 1 2 1 <1
T WIND DIR NW W S S SW W SW W W SW SW E SE SE E SE E E E
T WIND SPD 10 6 5 4 4 3 4 11 8 3 5 4 6 4 3 3 5 6 9
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 28 21 3 2 2 2 4 35 33 8 3 2 3 2 3 6 16 12 4
MAX LVORI 2 2 3 5 5 6 6 3 1 3 6 9 9 9 9 6 3 5 9
STABILITY D B G F G G A A C C F F F F C C C C F
CEILING None None None None 2400 3200 100 100 100
STA PRES 27.21 27.22 27.22 27.25 27.22 27.28 27.27 27.32 27.33
Date Wed 09/23/26Thu 09/24/26Fri 09/25/26Sat 09/26/26
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 54 66 49 66 46 68 45 69
TEMP 59 55 62 59 53 51 61 57 50 48 64 57 48 46 64 56
DEWPT 59 55 61 58 53 51 60 56 50 48 56 54 48 46 52 51
RH 100100 97 96100100 97 96100100 75 90100100 65 83
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 B1 SC SC SC SC SC
POP 12HR 80 70 60 40 10 10 5 5
RAIN SHWRS O NM NM NM NM SC SC IS
TSTMS 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