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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1231 PM EDT Sat Aug 22 2026
VAZ046-222000-
RAWS 441101
37.39N 78.80W Elev. 804 ft
1231 PM EDT Sat Aug 22 2026
Date Sat 08/22/26 Sun 08/23/26 Mon 08/24/26
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 81 65 85 60 83
TEMP 78 79 76 69 68 66 67 77 83 84 73 67 63 60 62 76 82 83 74
DEWPT 70 69 69 68 67 65 65 64 61 58 56 55 55 54 57 58 57 56 55
MAX/MIN RH 71 100 41 86 40
RH 76 72 79 97 97 97 93 64 47 41 55 65 75 81 84 54 43 40 51
WIND DIR SE S S SW SW W W NW NW W W NW W W W W W W NW
WIND SPD 3 4 3 3 4 5 6 9 9 9 5 4 3 3 4 6 8 8 5
CLOUDS B1 FW B1 SC FW FW CL CL CL CL CL CL CL CL CL CL CL CL FW
CLOUDS(%) 56 15 53 42 12 21 2 2 3 5 3 1 4 2 1 2 4 5 10
VSBY 10 10 10 7 6 4 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 20 40 0 0 0
RAIN SHWRS IS SC IS
TSTMS IS IS IS
MIX HGT 3 3 <1 <1 <1 <1 <1 3 6 7 <1 <1 <1 <1 <1 5 6 7 <1
T WIND DIR NE E SE SE S SW W NW W W W NW W W W W W W NW
T WIND SPD 8 5 2 2 2 3 10 13 11 10 5 4 3 2 1 11 11 12 3
DISPERSION VP VP VP PR PR VP VP VP PR
ADI 34 25 1 1 1 2 11 59 76 80 3 2 2 1 1 67 80 96 2
MAX LVORI 3 3 4 10 8 8 6 1 1 1 3 3 4 5 5 1 1 1 2
STABILITY A A F F G F B B B B F F G G A B B B F
CEILING None None None None None None None None None
STA PRES 29.23 29.20 29.17 29.22 29.21 29.27 29.28 29.32 29.30
Date Tue 08/25/26Wed 08/26/26Thu 08/27/26Fri 08/28/26
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 58 84 61 87 67 85 67 88
TEMP 61 60 82 75 64 63 84 77 69 69 83 76 69 69 85 79
DEWPT 52 54 58 59 59 60 67 67 68 68 72 70 69 69 71 70
RH 72 81 44 58 84 90 57 71 97 97 70 82100100 63 74
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW FW FW FW SC SC SC B1 B1 B2 B1 SC SC SC
POP 12HR 0 0 0 20 20 60 50 20
RAIN SHWRS IS IS IS IS NM SC IS
TSTMS IS 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