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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Mon Aug 17 2026
VAZ024-172000-
RAWS 441631
37.63N 79.51W Elev. 865 ft
801 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 93 68 91 63 92
TEMP 85 91 89 79 74 72 70 71 83 89 88 79 71 67 64 66 82 89 91 83
DEWPT 71 70 70 72 72 71 69 71 71 70 68 67 66 64 63 64 66 65 65 65
MAX/MIN RH 48 100 50 97 41
RH 63 50 54 79 93 97 97100 67 54 52 67 84 90 97 93 58 45 42 55
WIND DIR NW NW W W W W W W N NW NW NW NW N N N W W W W
WIND SPD 5 4 4 2 1 1 1 1 2 3 3 2 1 0 0 0 1 3 3 1
WIND GUST 16
CLOUDS SC B1 B2 B2 B1 SC FW FW FW SC SC FW FW FW FW FW CL FW FW FW
CLOUDS(%) 36 66 70 74 68 38 12 15 20 42 28 12 17 17 8 8 5 6 11 13
VSBY 10 10 10 10 5 1 1 1 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 40 40 20 0 0
RAIN SHWRS SC SC IS IS IS
TSTMS SC IS IS
MIX HGT 3 4 3 <1 <1 <1 <1 <1 4 5 5 <1 <1 <1 <1 <1 4 5 6 <1
T WIND DIR NW NW W NW NW NW NW N N NW NW NW NW N N NW SW W W SW
T WIND SPD 17 14 10 1 2 3 3 6 5 3 5 8 4 4 3 3 4 6 8 2
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 74 54 33 1 1 2 2 7 28 22 35 4 2 2 2 3 23 43 58 1
MAX LVORI 1 1 1 4 7 8 10 8 3 2 1 3 5 6 8 6 2 1 1 3
STABILITY A C C F F G G A A A A G G G G A A A A G
CEILING None 4100 5700 None None None None None None None
STA PRES 28.45 28.41 28.42 28.42 28.44 28.42 28.46 28.47 28.47 28.43
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 67 92 66 85 64 85 62 86
TEMP 70 70 91 81 70 67 83 75 67 66 83 76 67 65 84 76
DEWPT 65 66 70 69 69 67 71 69 67 66 70 68 66 65 67 64
RH 84 87 50 67 97100 67 82100100 65 76 97100 57 66
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW SC B1 B1 B1 B1 B2 B2 B2 B1 B1 B1 SC SC SC
POP 12HR 5 50 40 70 70 50 30 20
RAIN SHWRS SC SC SC SC NM NM SC IS SC SC IS
TSTMS SC SC IS IS SC 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