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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
531 AM EDT Thu Aug 20 2026
NCZ003-202000-
RAWS 310301
36.48N 80.86W Elev. 1300 ft
531 AM EDT Thu Aug 20 2026
Date Thu 08/20/26 Fri 08/21/26 Sat 08/22/26
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 89 68 82 66 86
TEMP 71 85 88 88 80 73 71 69 70 77 81 79 74 70 68 67 68 79 85 83 76
DEWPT 67 68 68 69 70 69 68 67 68 71 72 73 71 69 67 66 68 71 68 68 68
MAX/MIN RH 51 96 73 99 57
RH 87 57 52 54 72 87 90 93 93 82 74 82 90 97 97 97100 77 57 61 76
WIND DIR NW W SW W NW NW N N N E SE SE N N N N N W W W W
WIND SPD 1 3 5 4 1 1 0 0 0 1 3 2 0 0 0 0 0 1 2 3 1
CLOUDS FW SC B1 SC B1 B1 B1 B2 B1 B2 B2 OV B2 B2 B1 SC SC SC SC SC SC
CLOUDS(%) 25 47 57 45 58 56 51 70 61 79 75 90 84 84 68 49 46 34 39 39 31
VSBY 10 10 7 7 7 7 7 7 7 7 6 3 6 6 7 7 10 10 7 7 10
POP 12HR 30 50 90 60 20
RAIN SHWRS IS IS SC SC SC SC SC SC SC NM NM NM IS IS IS IS
TSTMS IS IS SC IS IS IS IS SC SC SC IS IS
MIX HGT <1 3 5 3 <1 <1 <1 <1 <1 2 3 2 <1 1 <1 <1 <1 3 5 4 <1
T WIND DIR SW W W SW S N N NE E E W SE E E E E SE S SW SW SW
T WIND SPD 1 11 12 11 3 2 4 2 11 4 2 8 5 2 2 4 3 8 5 6 9
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 1 51 53 48 2 1 2 1 12 11 8 18 3 1 1 2 4 28 35 39 4
MAX LVORI 6 1 1 1 3 6 6 7 5 4 3 3 6 8 8 8 9 3 1 1 4
STABILITY A A C A F F F F B B B B F F F F A A A A G
CEILING None None 9500 4600 600 600 600 None None None
STA PRES 28.16 28.12 28.14 28.16 28.22 28.19 28.17 28.13 28.11 28.06
Date Sun 08/23/26Mon 08/24/26Tue 08/25/26Wed 08/26/26
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 63 85 60 85 61 84 64 85
TEMP 66 66 84 76 64 62 82 76 63 64 81 76 66 66 83 78
DEWPT 64 64 62 61 59 58 59 60 57 57 64 65 64 64 69 69
RH 93 93 48 60 84 87 46 58 81 78 56 69 93 93 63 74
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW FW FW FW CL FW FW FW SC SC SC SC SC B1
POP 12HR 0 5 5 5 0 10 20 40
RAIN SHWRS IS IS SC
TSTMS IS SC
$$
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