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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
901 AM EDT Thu Aug 13 2026
VAZ018-132000-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
901 AM EDT Thu Aug 13 2026
Date Thu 08/13/26 Fri 08/14/26 Sat 08/15/26
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 88 69 87 70 86
TEMP 80 86 85 76 73 71 70 71 79 83 82 75 74 72 70 71 80 84 81 74
DEWPT 71 71 71 70 69 68 67 68 73 73 73 72 71 70 68 69 72 73 72 72
MAX/MIN RH 60 93 69 94 68
RH 74 61 63 82 87 90 90 90 82 72 74 90 90 93 93 93 77 70 74 93
WIND DIR W W NW NW NW NW NW NW W W W NW W NW NW N E SE SE S
WIND SPD 6 5 5 3 2 2 2 2 3 4 4 2 2 2 2 2 2 3 3 1
WIND GUST 16 13
CLOUDS SC SC SC SC SC B1 SC B1 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1
CLOUDS(%) 50 41 40 29 48 51 49 59 87 75 59 67 67 56 56 58 57 69 69 56
VSBY 10 10 10 10 10 6 5 5 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 20 40 60 50 50
RAIN SHWRS IS IS SC SC NM SC SC SC IS IS SC SC SC SC IS
TSTMS IS IS IS IS SC SC IS
MIX HGT 2 4 4 <1 <1 <1 <1 <1 2 4 3 <1 <1 <1 <1 <1 3 4 3 <1
T WIND DIR NW W W W W NW SW W W W S W NW NW NW NE NE E S S
T WIND SPD 9 9 16 2 2 1 2 2 12 12 10 10 8 13 4 4 3 3 6 8
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 27 47 85 1 1 1 1 2 38 45 31 5 4 6 2 5 11 15 25 4
MAX LVORI 3 1 1 5 6 7 7 6 3 3 3 6 6 6 6 6 4 3 3 6
STABILITY A A A G F F F B B C C F F F F B B B B F
CEILING None None None 1600 2900 2200 None 1100 2200
STA PRES 27.77 27.79 27.81 27.85 27.79 27.83 27.88 27.95 27.95
Date Sun 08/16/26Mon 08/17/26Tue 08/18/26Wed 08/19/26
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 69 90 72 89 68 86 66 86
TEMP 71 71 89 80 74 73 87 78 71 70 83 75 68 68 84 76
DEWPT 68 68 73 72 69 69 72 70 68 67 70 68 65 65 69 68
RH 90 90 59 77 84 87 61 76 90 90 65 79 90 90 61 76
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B1 SC B1 SC FW FW B1 SC B1 B1 SC SC SC SC SC
POP 12HR 20 30 20 40 20 30 20 20
RAIN SHWRS IS SC IS SC IS SC IS IS
TSTMS IS SC 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