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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Thu Aug 20 2026
NCZ003-202000-
RAWS 310302
36.35N 80.48W Elev. 1076 ft
801 AM EDT Thu Aug 20 2026
Date Thu 08/20/26 Fri 08/21/26 Sat 08/22/26
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 90 69 82 67 85
TEMP 83 89 88 81 75 72 70 70 76 81 80 74 70 69 68 68 76 82 84 78
DEWPT 68 67 68 70 70 69 68 68 70 70 71 70 70 68 67 68 70 69 68 68
MAX/MIN RH 48 95 71 100 58
RH 61 48 52 69 84 90 93 93 82 69 74 87100 97 97100 82 65 59 71
WIND DIR SW SW W W W N NE NE NE E E NE NE NE NW W W SW SW SW
WIND SPD 4 5 5 3 3 3 3 4 3 3 2 3 2 2 2 2 2 3 3 2
CLOUDS SC SC SC B2 B1 B1 B1 B1 B2 B2 B2 OV OV B2 B2 SC SC SC SC SC
CLOUDS(%) 34 35 45 71 68 51 60 67 75 80 87 98 98 73 76 49 45 43 43 35
VSBY 10 10 7 7 6 7 7 7 7 7 3 3 3 10 10 10 10 7 7 10
POP 12HR 30 50 90 80 20
RAIN SHWRS IS SC SC SC IS SC SC SC NM O O IS IS
TSTMS IS SC IS IS SC NM SC IS IS IS
MIX HGT 3 6 4 <1 <1 <1 <1 1 2 4 3 <1 <1 <1 <1 <1 2 4 4 <1
T WIND DIR SW W SW SW N N E NE NE NE E E NE NE E SE S SW S SW
T WIND SPD 12 11 9 3 2 2 3 10 6 6 6 4 3 4 2 3 8 5 6 8
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 45 84 48 2 1 1 2 12 17 32 23 2 2 2 1 4 24 31 33 4
MAX LVORI 1 1 1 3 5 7 7 5 3 3 3 6 8 9 8 9 3 1 1 3
STABILITY A A A F F F F C B B B F F F F A A A A G
CEILING None None 8500 3200 600 600 500 500 None None
STA PRES 28.97 28.92 28.94 28.98 29.04 29.02 28.99 28.96 28.94 28.88
Date Sun 08/23/26Mon 08/24/26Tue 08/25/26Wed 08/26/26
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 66 85 62 84 63 84 65 85
TEMP 68 67 84 76 65 64 82 76 65 65 81 77 67 67 83 78
DEWPT 65 65 62 61 59 59 59 60 58 58 64 64 64 65 68 68
RH 90 93 48 60 81 84 46 58 78 78 56 64 90 93 61 71
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC FW FW FW FW FW CL FW FW FW FW SC SC SC SC B1
POP 12HR 5 5 0 5 5 20 20 30
RAIN SHWRS IS IS IS IS SC
TSTMS IS SC
$$
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