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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
931 PM EDT Mon Aug 17 2026
NCZ003-180800-
RAWS 310301
36.48N 80.86W Elev. 1300 ft
931 PM EDT Mon Aug 17 2026
Date 08/17/26 Tue 08/18/26 Wed 08/19/26 Thu
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 70 88 64 89 68
TEMP 75 73 71 72 81 86 86 80 73 69 66 68 81 87 89 83 75 71 69 72
DEWPT 71 70 69 69 71 69 69 68 67 66 63 65 67 65 65 67 66 64 63 66
MIN/MAX RH 92 54 92 45 83
RH 87 90 93 90 72 57 57 67 81 90 90 90 63 48 45 59 74 79 81 81
WIND DIR NW NW W NW NW NW NW NW NW NW NW NW N NW NW N NW N N N
WIND SPD 1 1 2 3 5 4 5 4 4 2 2 2 0 1 2 0 1 0 0 0
CLOUDS B2 B1 SC FW SC FW FW FW FW FW FW FW FW FW FW FW SC FW SC FW
CLOUDS(%) 85 54 32 24 39 18 21 13 14 18 9 11 6 6 12 18 28 16 29 19
VSBY 10 10 9 10 10 10 10 10 10 10 9 10 10 10 10 10 10 10 10 10
POP 12HR 30 5 0 0 0
RAIN SHWRS
TSTMS
MIX HGT <1 <1 <1 <1 3 5 4 <1 <1 <1 <1 <1 3 5 6 <1
T WIND DIR SW N NW N N NW NW N NW N N N N N N N
T WIND SPD 1 2 3 4 5 5 8 5 5 11 9 13 12 10 10 4
DISPERSION VP VP VP VP VP VP VP VP VP VP VP
ADI 1 1 2 4 24 35 45 3 3 5 4 13 52 69 78 2
MAX LVORI 6 7 7 6 3 1 1 3 5 5 6 5 1 1 1 3
STABILITY F F F A A A A F F G G A A A A G
CEILING None None None None None None None None
STA PRES 28.06 28.08 28.04 28.07 28.07 28.10 28.08
Date 08/20Fri 08/21/26Sat 08/22/26Sun 08/23/26Mon 08/24/26
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 89 67 84 65 82 64 84 61 84
TEMP 89 81 70 69 82 76 67 68 80 75 68 66 82 76 64 64 81 76
DEWPT 69 70 68 69 72 72 67 68 70 69 65 65 65 64 61 61 61 61
RH 52 69 93100 72 87100100 72 82 90 97 56 66 90 90 51 60
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC B1 B1 B1 B1 OV B1 B1 B1 B1 SC SC SC FW FW FW SC SC
POP 12HR 50 50 70 50 50 20 10 20 10
RAIN SHWRS SC SC IS SC NM SC IS SC SC IS IS
TSTMS SC SC 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