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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 PM EDT Thu Aug 13 2026
VAZ024-140800-
RAWS 441631
37.63N 79.51W Elev. 865 ft
801 PM EDT Thu Aug 13 2026
Date 08/13/26 Fri 08/14/26 Sat 08/15/26 Sun
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 69 91 70 90 70
TEMP 75 72 70 71 82 88 87 80 75 73 71 72 83 89 85 78 74 72 71 72
DEWPT 70 69 68 69 70 71 72 73 73 72 71 72 73 73 74 74 73 72 71 72
MIN/MAX RH 97 56 99 60 100
RH 84 90 93 93 67 57 61 79 94 97100100 72 59 70 88 97100100100
WIND DIR W NW N N NW W W E N N N N NE NE E E N N N SW
WIND SPD 2 1 0 0 1 3 3 1 0 0 0 0 1 3 2 1 0 0 0 1
CLOUDS B2 B1 B1 B2 B1 B2 B2 B1 B1 B2 B2 B2 B1 B2 B2 B1 B2 B1 B1 SC
CLOUDS(%) 78 58 57 86 68 78 82 62 69 79 79 81 69 74 74 63 74 69 68 50
VSBY 9 7 5 7 8 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 10 40 30 60 30
RAIN SHWRS SC SC IS SC SC SC NM NM SC SC
TSTMS IS SC SC SC SC IS
Obvis PF
MIX HGT <1 <1 <1 <1 3 4 4 <1 <1 <1 <1 <1 3 4 3 <1
T WIND DIR N NW NW N NW W W S NE NE NE E NE N E E
T WIND SPD 2 2 3 2 3 6 9 2 3 8 4 5 2 2 1 2
DISPERSION VP VP VP VP VP VP VP VP VP VP VP
ADI 1 1 2 2 11 34 40 1 2 4 2 6 7 11 4 1
MAX LVORI 5 7 7 6 3 1 1 4 7 8 8 8 3 2 3 6
STABILITY F G F B B B B F F F F B B B B F
CEILING 4700 12000 1900 5800 3400 2000 4000 3500 3500
STA PRES 28.51 28.53 28.61 28.55 28.59 28.64 28.69 28.66
Date 08/16Mon 08/17/26Tue 08/18/26Wed 08/19/26Thu 08/20/26
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 95 72 94 69 91 68 92 68 94
TEMP 93 85 75 74 91 84 72 71 88 80 71 70 89 82 71 70 91 83
DEWPT 74 73 71 70 70 70 70 69 69 69 68 68 69 68 68 68 68 67
RH 54 67 87 87 50 63 93 93 54 69 90 93 52 63 90 93 47 59
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC FW FW FW B1 SC FW SC SC SC SC SC SC FW SC SC SC
POP 12HR 20 10 40 20 20 30 20 10 20
RAIN SHWRS IS SC IS IS SC IS IS
TSTMS IS SC IS IS 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