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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
337 AM EDT Tue Aug 18 2026
NCZ003-182000-
RAWS 310302
36.35N 80.48W Elev. 1076 ft
337 AM EDT Tue Aug 18 2026
Date Tue 08/18/26 Wed 08/19/26 Thu 08/20/26
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 67 89 70 92
TEMP 72 73 82 87 88 83 77 73 69 70 79 85 88 83 77 74 72 72 84 90 87 80
DEWPT 70 69 68 67 65 65 66 66 65 64 64 62 61 62 66 66 65 67 68 68 68 69
MAX/MIN RH 46 87 41 85 48
RH 93 87 63 52 47 55 69 79 87 81 60 46 40 49 69 76 79 84 59 49 53 69
WIND DIR NW NW N NW NW N N N N N N NW NW W SW N N N S SW SW W
WIND SPD 4 3 6 5 5 4 5 4 4 3 3 3 3 2 2 2 2 2 3 4 4 2
CLOUDS SC CL FW FW FW FW FW FW SC CL FW FW CL CL FW FW FW FW FW B1 B1 B1
CLOUDS(%) 41 3 16 18 15 15 21 20 27 4 10 7 3 2 14 10 16 17 17 59 59 67
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 6 6 6
POP 12HR 5 0 0 0 40
RAIN SHWRS SC SC SC
TSTMS SC SC SC
MIX HGT <1 <1 4 5 5 <1 <1 <1 <1 <1 4 5 6 <1 <1 <1 <1 <1 4 7 6 <1
T WIND DIR NW NW N NW NW NW NW NW N N N NW NW S S SW W SW W W W NW
T WIND SPD 5 8 12 9 9 6 6 5 4 3 5 3 2 2 2 2 1 1 12 5 9 2
DISPERSION VP VP PR VP VP VP VP VP VP VP
ADI 4 8 55 59 58 3 3 3 2 3 27 23 16 1 1 1 1 1 58 45 61 1
MAX LVORI 6 5 1 1 1 3 3 5 6 5 2 2 2 2 3 4 4 5 1 1 1 3
STABILITY E A B A A F F F F A A A A G G G G A A B B F
CEILING None None None None None None None None None 9300
STA PRES 28.88 28.84 28.89 28.90 28.92 28.89 28.90 28.90 28.94 28.91
Date Fri 08/21/26Sat 08/22/26Sun 08/23/26Mon 08/24/26
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 86 67 84 66 86 64 85
TEMP 71 71 85 76 70 68 81 77 68 67 83 77 66 66 82 77
DEWPT 69 69 70 70 70 68 70 68 67 65 64 63 61 61 61 60
RH 93 93 61 82100100 69 74 97 93 53 62 84 84 49 56
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B1 SC OV B2 B1 B1 B1 SC SC FW SC SC FW FW SC
POP 12HR 50 70 70 50 20 10 5 5
RAIN SHWRS SC SC IS NM NM IS SC IS
TSTMS SC SC SC 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