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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Wed Aug 19 2026
NCZ003-192000-
RAWS 310302
36.35N 80.48W Elev. 1076 ft
801 AM EDT Wed Aug 19 2026
Date Wed 08/19/26 Thu 08/20/26 Fri 08/21/26
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 70 90 68 83
TEMP 81 86 88 82 75 73 71 72 82 86 86 78 73 70 69 70 76 82 78 72
DEWPT 66 64 64 65 66 65 65 66 67 68 69 69 69 69 68 68 70 70 71 70
MAX/MIN RH 45 83 51 98 69
RH 60 48 45 56 74 76 81 81 61 55 57 74 87 97 97 93 82 67 79 93
WIND DIR N NW W SW W W W NW SW W W W N NE N NE E E E E
WIND SPD 2 3 3 1 1 2 2 2 4 5 5 2 3 3 4 4 3 3 3 3
CLOUDS FW FW CL CL FW FW FW FW SC B2 SC B2 B2 B1 B2 B1 B2 OV OV B2
CLOUDS(%) 14 15 3 2 17 24 19 15 30 86 39 71 71 63 74 58 73 90 90 79
VSBY 10 10 10 10 10 10 10 10 10 10 10 6 6 6 6 7 7 3 3 3
POP 12HR 0 5 30 60 80
RAIN SHWRS NM NM SC SC SC SC O O NM
TSTMS SC SC IS IS IS SC SC SC
MIX HGT 4 5 6 <1 <1 <1 <1 <1 3 5 4 <1 <1 <1 <1 <1 3 4 2 <1
T WIND DIR N W W W SW W W W SW SW SW SW SW NE NE NE NE NE E E
T WIND SPD 3 4 5 2 1 1 1 2 14 9 13 3 2 6 8 13 11 9 11 10
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 16 31 41 1 1 1 1 2 57 50 78 2 1 3 5 11 37 43 28 5
MAX LVORI 2 1 1 3 4 4 6 5 1 1 1 3 6 8 7 6 3 1 3 6
STABILITY A A A G G G G A A B A F F F E C B B B F
CEILING None None None None None 7100 3700 2800 800 3300
STA PRES 28.94 28.91 28.92 28.91 28.91 28.87 28.91 28.96 29.03 28.98
Date Sat 08/22/26Sun 08/23/26Mon 08/24/26Tue 08/25/26
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 67 84 65 85 64 84 65 85
TEMP 68 68 81 76 68 67 83 77 66 65 82 77 67 66 82 77
DEWPT 68 68 69 69 66 65 65 63 61 61 62 62 61 61 65 65
RH 100100 67 79 93 93 55 62 84 87 51 60 81 84 56 67
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B1 B1 SC SC SC SC FW FW FW FW FW FW SC SC
POP 12HR 70 30 20 10 5 5 10 20
RAIN SHWRS NM IS SC IS IS
TSTMS 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