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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
131 AM EDT Tue Aug 18 2026
VAZ018-190800-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
131 AM EDT Tue Aug 18 2026
Date 08/17/26 Tue 08/18/26 Wed 08/19/26 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 68 82 62 84 67
TEMP 71 70 71 78 81 80 73 69 66 63 64 76 82 83 76 72 70 69 69
DEWPT 70 69 69 69 68 66 65 63 62 60 61 62 61 61 63 63 63 62 64
MIN/MAX RH 99 61 92 47 85
RH 97 97 93 74 65 62 76 81 87 90 90 62 49 47 64 73 78 78 84
WIND DIR NW NW NW NW NW NW NW NW NW NW NW NW NW NW NW W W W W
WIND SPD 5 5 5 5 5 6 5 4 3 3 2 3 5 5 4 2 1 1 1
WIND GUST 16 16
CLOUDS B1 SC SC SC SC SC FW FW CL FW FW CL CL SC SC FW FW FW SC
CLOUDS(%) 64 30 45 46 39 27 6 11 5 11 22 4 5 45 30 20 20 24 37
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 7
POP 12HR 20 5 0 0 5
RAIN SHWRS IS
TSTMS
MIX HGT <1 <1 1 3 4 4 <1 <1 <1 <1 <1 3 5 6 <1 <1 <1 <1 <1
T WIND DIR W NW NW NW NW NW NW NW NW NW NW NW NW W W W NW NW W
T WIND SPD 10 8 8 5 5 6 14 9 4 3 2 6 9 6 4 2 1 1 2
DISPERSION PR PR PR VP VP VP VP VP VP VP
ADI 7 4 11 22 28 36 7 4 2 2 2 28 56 49 2 1 1 1 2
MAX LVORI 6 8 5 3 2 1 4 5 5 7 6 2 1 1 3 3 4 4 5
STABILITY E F A A A B F F G G A A A A F G G G A
CEILING None None None None None None None None None
STA PRES 27.72 27.75 27.72 27.77 27.78 27.79 27.76 27.77 27.75
Date 08/20Fri 08/21/26Sat 08/22/26Sun 08/23/26Mon 08/24/26
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 87 66 83 65 82 63 81 61 81
TEMP 86 72 68 68 82 70 68 66 81 70 66 65 81 69 63 62 80 68
DEWPT 69 68 66 66 70 68 65 65 69 65 62 62 64 61 59 59 61 58
RH 57 87 93 93 67 93 90 97 67 84 87 90 56 76 87 90 52 70
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC B2 B1 B1 B1 OV B2 B1 B1 B1 SC SC SC SC FW FW FW SC
POP 12HR 60 40 80 50 50 10 10 5 5
RAIN SHWRS IS NM SC IS SC O SC IS SC SC
TSTMS SC IS IS SC 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
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