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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
431 AM EDT Sun Aug 23 2026
VAZ012-232000-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
431 AM EDT Sun Aug 23 2026
Date Sun 08/23/26 Mon 08/24/26 Tue 08/25/26
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 77 52 77 50 82
TEMP 59 59 67 73 73 65 58 55 53 54 69 74 74 64 55 52 50 53 71 78 80 70
DEWPT 59 58 58 55 53 53 52 51 50 52 55 53 52 52 50 49 47 49 53 51 51 53
MAX/MIN RH 49 91 45 90 35
RH 100 96 73 53 49 65 80 86 89 93 61 48 46 65 83 89 89 86 53 39 36 55
WIND DIR NW NW NW W W NW NW W W W NW NW NW NW N N N N N W W NW
WIND SPD 3 3 3 3 3 1 1 1 1 2 2 3 2 1 0 0 0 0 0 1 2 1
CLOUDS SC SC FW FW FW CL FW CL FW FW SC SC SC FW FW FW FW FW FW FW FW FW
CLOUDS(%) 33 33 20 13 11 3 11 1 9 18 32 34 32 15 20 17 14 25 24 19 16 20
VSBY 7 9 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 0 0 0 0
MIX HGT <1 1 4 5 6 <1 <1 <1 <1 <1 4 5 5 <1 <1 <1 <1 <1 4 6 5 <1
T WIND DIR NW NW NW NW W W W W NW W W W W N N W NW NW W W W SE
T WIND SPD 13 12 18 16 14 9 6 3 3 2 11 8 8 4 3 2 2 1 3 4 2 1
DISPERSION VP VP VP VP VP VP VP VP VP VP
ADI 6 18 90107105 4 3 2 2 2 57 50 53 2 2 1 1 1 16 32 15 1
MAX LVORI 8 5 3 1 1 3 5 5 6 6 1 1 1 3 5 6 6 6 2 1 2 2
STABILITY G A A A A G G G G A A A A G G G G A A A A G
CEILING None None None None None None None None None None
STA PRES 27.26 27.25 27.27 27.27 27.29 27.28 27.33 27.32 27.36 27.31
Date Wed 08/26/26Thu 08/27/26Fri 08/28/26Sat 08/29/26
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 55 85 60 83 59 84 59 84
TEMP 57 58 83 73 63 63 78 72 63 62 79 72 62 62 80 72
DEWPT 51 54 58 61 60 61 65 64 62 62 64 63 60 61 63 62
RH 80 86 43 66 90 93 64 76 97100 60 73 93 97 56 71
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW SC SC SC SC B1 B2 SC SC SC SC SC SC SC B1
POP 12HR 0 10 20 60 20 20 10 30
RAIN SHWRS IS SC NM IS IS SC
TSTMS IS IS SC IS 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