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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
431 AM EDT Mon Aug 17 2026
NCZ003-172000-
RAWS 310302
36.35N 80.48W Elev. 1076 ft
431 AM EDT Mon Aug 17 2026
Date Mon 08/17/26 Tue 08/18/26 Wed 08/19/26
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 92 71 88 67 89
TEMP 73 73 85 89 89 81 76 74 73 73 81 85 87 80 74 70 68 69 80 85 89 82
DEWPT 70 70 71 71 69 72 72 71 70 70 70 70 69 68 66 65 64 64 66 65 65 66
MAX/MIN RH 50 92 55 89 45
RH 90 90 63 56 52 74 87 90 90 90 69 61 55 67 76 84 87 84 62 51 45 58
WIND DIR W W W W W W W NW NW NW NW NW NW N N N N N N W W S
WIND SPD 4 4 4 5 5 3 4 4 4 5 5 5 4 5 5 4 4 3 2 3 2 1
CLOUDS SC SC FW FW B1 B1 B2 SC FW CL FW FW FW FW FW FW FW FW FW FW FW FW
CLOUDS(%) 38 30 12 25 61 59 84 50 23 1 15 16 13 20 12 20 10 12 12 7 8 9
VSBY 9 9 10 10 10 10 10 9 9 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 40 30 5 0 0
RAIN SHWRS SC SC SC
TSTMS SC SC
MIX HGT <1 <1 3 5 3 <1 <1 <1 <1 <1 4 5 6 <1 <1 <1 <1 <1 4 5 6 <1
T WIND DIR W SW W W W NW NW W NW N N N NW NW N N N N NE NW NW S
T WIND SPD 3 2 8 12 10 4 3 3 4 5 9 8 9 9 8 6 4 5 4 3 5 2
DISPERSION VP VP VP VP VP PR PR VP VP VP
ADI 2 2 31 85 35 2 2 2 2 6 45 54 66 4 4 3 2 6 21 21 39 1
MAX LVORI 7 6 3 1 1 4 6 6 6 6 3 1 1 3 4 5 6 5 2 2 1 3
STABILITY F A A A C F E E F A A A A F F F F A A A A G
CEILING None None 4800 None None None None None None None
STA PRES 28.90 28.84 28.86 28.85 28.88 28.84 28.89 28.90 28.91 28.87
Date Thu 08/20/26Fri 08/21/26Sat 08/22/26Sun 08/23/26
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 70 91 69 86 67 82 66 83
TEMP 72 72 89 81 72 70 83 76 69 69 79 75 68 67 80 76
DEWPT 65 66 68 70 69 69 71 70 69 68 71 69 67 67 68 66
RH 79 81 50 69 90 97 67 82100 97 77 82 97100 67 71
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW B1 B1 SC B1 B2 B2 B2 B1 B2 B1 SC SC SC
POP 12HR 0 30 40 70 70 60 40 20
RAIN SHWRS SC SC IS IS NM NM IS IS NM SC IS
TSTMS SC SC SC 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