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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
431 AM EDT Thu Aug 13 2026
NCZ005-132000-
RAWS 310540
36.38N 79.70W Elev. 858 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 93 72 92 72 90
TEMP 71 73 85 91 91 84 77 75 73 74 84 90 90 83 77 75 73 74 83 89 88 81
DEWPT 67 69 72 72 72 73 72 71 70 71 73 73 73 74 73 72 72 72 73 73 72 72
MAX/MIN RH 51 92 55 96 58
RH 87 87 65 54 54 70 85 87 90 90 70 58 58 74 87 90 97 93 72 59 59 74
WIND DIR W W W W W W W NW N N N NW NW NW NW N N N NE E E SE
WIND SPD 2 2 3 5 5 2 2 1 2 2 3 4 4 2 1 2 2 3 4 4 4 2
CLOUDS FW SC SC SC SC SC SC SC SC SC B1 B1 SC B1 B1 B1 SC SC SC B1 B1 B1
CLOUDS(%) 23 41 36 33 47 35 44 47 46 35 65 61 47 57 54 64 48 46 49 55 55 54
VSBY 9 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 20 10 20 30 30
RAIN SHWRS IS SC SC SC SC IS
TSTMS IS SC IS SC SC IS
MIX HGT <1 <1 3 6 5 <1 <1 <1 <1 <1 3 5 4 <1 <1 <1 <1 1 3 5 5 <1
T WIND DIR W SW NW W SW SW SW W SW SW W W SW SW W NW NE NE NE NE E SE
T WIND SPD 2 1 10 8 5 4 3 2 2 2 5 11 16 9 6 4 6 9 9 6 4 8
DISPERSION VP VP VP VP VP VP VP VP VP VP
ADI 1 1 43 58 35 2 2 1 1 2 20 48 84 4 3 2 3 13 35 29 19 4
MAX LVORI 7 6 1 1 1 3 5 6 7 6 3 1 1 3 6 6 8 5 3 2 2 4
STABILITY G A A A A G F F F A B C A F F F F A A C C F
CEILING None None None None 14200 None 12900 None None None
STA PRES 29.23 29.18 29.23 29.26 29.30 29.23 29.26 29.32 29.41 29.40
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 72 93 74 96 72 91 70 90
TEMP 74 73 91 87 77 76 94 87 75 74 89 83 73 72 87 83
DEWPT 71 72 73 71 72 72 70 70 71 71 69 69 70 70 69 68
RH 90 97 56 59 85 87 46 57 87 90 52 63 90 93 55 61
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B1 SC SC SC SC FW B1 B1 B1 SC SC B1 SC SC SC
POP 12HR 20 20 10 30 30 20 30 20
RAIN SHWRS IS IS SC SC IS SC IS
TSTMS IS IS SC IS IS SC 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