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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
831 AM EDT Tue Aug 25 2026
VAZ046-252000-
RAWS 441101
37.39N 78.80W Elev. 804 ft
831 AM EDT Tue Aug 25 2026
Date Tue 08/25/26 Wed 08/26/26 Thu 08/27/26
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 84 58 87 67 86
TEMP 73 80 82 73 66 63 61 62 79 85 86 77 72 69 67 69 78 84 86 78
DEWPT 54 54 54 56 55 55 54 56 62 64 65 65 66 67 67 68 70 71 71 70
MAX/MIN RH 38 87 50 100 61
RH 51 41 38 55 68 75 78 81 56 50 50 67 81 93100 97 76 65 61 76
WIND DIR NE NW SW SE S SW NW SE S S S S S S S S SW S S SE
WIND SPD 2 2 2 2 2 1 2 1 4 8 8 4 3 3 4 4 5 6 6 3
CLOUDS FW FW FW FW FW FW FW FW SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1
CLOUDS(%) 10 7 8 7 13 9 13 10 36 44 49 58 58 60 59 65 59 68 68 63
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 0 10 40 50
RAIN SHWRS SC SC SC SC SC SC SC SC SC
TSTMS IS IS SC SC
MIX HGT 4 6 6 <1 <1 <1 <1 <1 4 6 6 <1 <1 <1 <1 <1 3 5 4 <1
T WIND DIR N NE W SE SE W NW N SW SW S S S S S S SW S S S
T WIND SPD 6 2 1 2 1 1 1 0 9 9 11 5 16 3 3 4 16 12 13 10
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 34 16 9 1 1 1 1 0 42 62 77 4 7 2 2 4 53 52 54 5
MAX LVORI 1 2 2 2 4 4 4 4 1 1 1 3 4 7 8 9 3 1 1 4
STABILITY A A A G G G G A A B B E F F E C C C C F
CEILING None None None None None None 4300 3800 1700 3500
STA PRES 29.41 29.35 29.39 29.39 29.40 29.32 29.33 29.31 29.32 29.27
Date Fri 08/28/26Sat 08/29/26Sun 08/30/26Mon 08/31/26
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 87 66 85 66 88 68 91
TEMP 69 69 86 76 68 68 82 77 68 68 85 80 70 70 89 83
DEWPT 69 69 71 70 68 68 70 69 68 68 70 69 68 69 70 69
RH 100100 61 82100100 67 76100100 61 69 93 97 54 63
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B1 B1 B1 B1 B1 B1 B1 SC SC SC SC FW FW FW SC
POP 12HR 40 50 30 20 20 10 10 10
RAIN SHWRS SC SC 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
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