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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 PM EDT Mon Aug 31 2026
NCZ018-010800-
RAWS 311941
36.22N 81.63W Elev. 3254 ft
231 PM EDT Mon Aug 31 2026
Date 08/31/26 Tue 09/01/26 Wed 09/02/26 Thu
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 65 83 67 85 68
TEMP 79 72 68 67 65 67 79 82 81 75 70 69 67 69 81 84 81 76 72 70 69 70
DEWPT 63 64 63 62 61 62 64 64 65 65 65 64 63 63 65 64 66 66 65 64 63 63
MIN/MAX RH 88 54 85 52 82
RH 58 76 84 84 87 84 60 55 58 71 84 84 87 81 58 51 60 71 79 81 81 78
WIND DIR N NW W W NW W NW N NW W NW NW NW NW N S W N W W NW NW
WIND SPD 2 1 1 1 2 3 3 2 2 2 2 1 2 2 0 2 2 0 1 1 1 3
CLOUDS SC SC FW FW FW FW CL SC SC FW CL FW FW CL FW SC SC SC FW FW CL CL
CLOUDS(%) 39 33 20 11 8 11 5 39 26 12 5 11 6 1 7 40 40 34 24 12 5 1
VSBY 10 10 10 9 7 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 5 10 0 20 0
RAIN SHWRS IS IS IS
TSTMS IS IS IS
MIX HGT 4 <1 <1 <1 <1 <1 4 5 5 <1 <1 <1 <1 <1 4 6 3 <1
T WIND DIR N N NW NW NW NW N N N W NW NW NW NW NW W W S
T WIND SPD 6 1 2 2 3 3 9 8 4 1 2 3 3 3 4 3 1 2
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 37 1 1 1 2 3 45 51 28 1 1 2 2 3 25 26 4 1
MAX LVORI 1 4 5 5 6 5 1 1 2 4 5 5 5 5 2 2 3 3
STABILITY A G G G G A A A A G G G G A A A A G
CEILING None None None None None None None None None None
STA PRES 27.03 27.05 27.04 27.08 27.02 27.03 27.03 27.06 27.01
Date 09/03Fri 09/04/26Sat 09/05/26Sun 09/06/26Mon 09/07/26
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 84 67 85 66 82 59 74 55 73
TEMP 83 75 69 69 83 75 67 66 80 72 63 59 71 67 59 56 70 66
DEWPT 65 66 64 64 66 65 65 64 64 63 62 59 62 59 58 56 58 56
RH 55 74 84 84 57 71 93 93 58 73 97100 73 75 96100 66 70
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW SC SC FW FW B1 SC SC FW B1 SC SC B1 B1 B1 SC SC SC
POP 12HR 20 5 50 10 40 20 40 30 20
RAIN SHWRS IS SC SC IS SC SC SC IS IS
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