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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
431 AM EDT Thu Aug 13 2026
VAZ024-132000-
RAWS 441631
37.63N 79.51W Elev. 865 ft
431 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 94 70 91 70 90
TEMP 70 72 85 92 91 83 76 73 71 72 83 89 87 80 75 72 70 72 83 88 85 79
DEWPT 65 67 71 71 71 71 70 70 68 70 72 73 74 74 72 72 70 70 72 72 72 71
MAX/MIN RH 48 94 58 99 58
RH 84 84 63 51 52 67 82 90 90 93 70 59 65 82 90100100 93 70 59 65 77
WIND DIR W W W W NW W NW N N N NW W SW S N N N N E SE SE N
WIND SPD 1 2 3 4 4 2 1 1 0 0 1 3 2 1 0 0 0 1 2 3 2 0
CLOUDS SC SC SC SC SC FW B1 SC SC B1 B2 B2 B2 B1 B1 B1 B1 B1 SC B1 B1 B1
CLOUDS(%) 30 39 38 36 42 22 54 43 49 54 84 82 78 63 63 57 61 65 50 67 60 56
VSBY 9 10 10 10 10 10 10 6 8 9 9 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 10 20 50 40 30
RAIN SHWRS SC IS SC SC SC SC IS IS SC SC IS
TSTMS IS IS IS IS SC IS
MIX HGT <1 <1 3 5 5 <1 <1 <1 <1 <1 3 4 2 <1 <1 <1 <1 <1 3 4 4 <1
T WIND DIR NW NW NW W W W W N NW N NW W SE SE NE N N NE NE NE E SE
T WIND SPD 3 3 12 12 16 5 2 2 1 1 4 3 11 1 4 2 3 5 6 4 3 9
DISPERSION VP VP VP VP VP VP VP VP VP VP
ADI 2 3 45 82 92 3 1 1 1 1 16 16 35 1 2 1 2 6 26 23 17 4
MAX LVORI 6 6 1 1 1 3 5 7 8 7 3 2 3 6 6 8 10 6 3 2 3 4
STABILITY G A A A A G F F F B B B B F F F F B A B B F
CEILING None None None None 3400 5600 4000 3100 2500 2900
STA PRES 28.47 28.45 28.48 28.51 28.55 28.49 28.53 28.59 28.67 28.66
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 70 94 72 95 69 90 67 91
TEMP 72 72 93 85 74 74 93 84 72 71 88 80 71 69 89 81
DEWPT 70 70 73 73 72 72 72 71 70 69 70 69 68 67 69 69
RH 93 93 52 67 93 93 51 65 93 93 55 69 90 93 52 67
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B1 SC SC FW FW FW SC B1 B1 B1 SC B1 SC SC SC
POP 12HR 20 20 10 20 30 20 30 20
RAIN SHWRS IS IS IS SC IS IS SC IS
TSTMS IS 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