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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 PM EDT Thu Aug 13 2026
VAZ018-140800-
RAWS 444002
37.56N 80.18W Elev. 2702 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 68 87 70 86 70
TEMP 73 71 70 70 78 83 83 76 74 72 72 71 80 85 82 75 73 72 72 71
DEWPT 69 68 68 69 70 71 72 72 71 70 69 70 73 74 74 73 71 70 69 70
MIN/MAX RH 99 63 94 69 97
RH 87 90 93 97 76 67 70 87 90 93 90 97 79 70 77 94 93 93 90 97
WIND DIR NW NW NW W NW W W NW W W NW NW NW NW SW SE S S SW SW
WIND SPD 4 3 2 1 3 4 4 3 2 1 1 2 2 3 3 1 1 1 1 2
WIND GUST 14
CLOUDS B1 SC B1 B2 B1 B1 B1 B1 B1 B2 B2 B1 B1 B2 B2 B1 B1 B1 B1 SC
CLOUDS(%) 63 32 67 76 68 69 57 69 61 82 72 58 68 77 77 51 67 63 57 40
VSBY 10 7 6 5 9 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 20 40 50 70 20
RAIN SHWRS SC SC SC IS IS IS IS NM NM IS IS
TSTMS IS SC IS SC SC IS
Obvis PF PF
MIX HGT <1 <1 <1 <1 3 4 4 <1 <1 <1 <1 <1 3 4 2 <1
T WIND DIR W W NW NW W W W W NW N E E SE E E SE
T WIND SPD 4 3 2 2 4 8 14 12 4 2 5 5 2 1 1 2
DISPERSION VP VP VP VP VP VP VP VP VP VP VP
ADI 2 2 1 2 15 30 55 6 2 1 3 6 8 6 3 1
MAX LVORI 6 7 7 8 4 3 1 5 6 7 6 6 4 3 4 8
STABILITY G G F B B C C F F F F B B B B F
CEILING None 8400 1000 4300 2400 700 200 1700 1700
STA PRES 27.82 27.83 27.89 27.86 27.89 27.93 27.98 27.95
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 91 71 88 68 86 67 88 68 89
TEMP 89 80 74 73 86 77 71 69 83 75 69 69 85 77 70 69 86 78
DEWPT 73 71 68 68 70 70 67 67 69 68 65 65 68 67 65 65 68 67
RH 59 74 82 84 59 79 87 93 63 79 87 87 57 71 84 87 55 69
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC SC FW FW B1 SC SC SC SC SC SC SC SC FW SC FW SC
POP 12HR 20 20 50 10 30 20 10 10 20
RAIN SHWRS IS IS IS IS SC SC IS IS
TSTMS IS IS 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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