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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 PM EDT Wed Sep 16 2026
NCZ003-170800-
RAWS 310302
36.35N 80.48W Elev. 1076 ft
231 PM EDT Wed Sep 16 2026
Date 09/16/26 Thu 09/17/26 Fri 09/18/26 Sat
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 63 90 68 88 67
TEMP 86 78 69 67 65 65 80 88 87 77 73 70 70 70 84 88 85 76 72 70 69 68
DEWPT 64 64 64 63 62 62 66 66 67 69 68 68 67 68 70 69 70 72 71 69 68 66
MIN/MAX RH 92 46 94 54 98
RH 48 62 84 87 90 90 62 48 52 76 84 93 90 93 63 54 61 87 97 97 97 93
WIND DIR E SE SW W W W S S W W W NW NW NW N N N NE NE NE NE NE
WIND SPD 3 1 1 1 2 2 2 3 2 1 2 2 3 3 3 4 3 3 5 6 8 8
CLOUDS CL CL CL CL FW SC FW FW B1 B1 B1 CL SC SC SC B2 B2 B2 B2 B2 B2 B2
CLOUDS(%) 4 1 2 2 17 37 12 10 51 65 52 5 35 38 38 79 79 70 70 71 84 73
VSBY 10 10 10 10 10 2 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 30 10 70 40
RAIN SHWRS SC IS IS NM NM SC SC
TSTMS SC SC SC SC
Obvis PF
MIX HGT 4 <1 <1 <1 <1 <1 2 5 3 <1 <1 <1 <1 <1 3 5 3 <1
T WIND DIR N NW NW NW NW NW W SW SW W W W NW NW N W W NW
T WIND SPD 3 3 2 2 1 1 2 5 8 4 2 3 3 3 3 6 5 5
DISPERSION VP VP VP VP VP VP VP VP VP PR PR PR
ADI 16 1 1 1 1 1 5 32 23 2 1 2 2 4 14 21 18 3
MAX LVORI 2 3 5 7 8 7 3 1 2 4 7 7 8 6 3 2 2 5
STABILITY B G G G G B B B C F F G G B B D B F
CEILING None None None None None None None None 5200 5400
STA PRES 0.0 4.871 29.22 29.20 29.12 29.09 29.06 29.07 29.00
Date 09/19Sun 09/20/26Mon 09/21/26Tue 09/22/26Wed 09/23/26
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 80 65 86 65 84 63 79 63 76
TEMP 77 75 68 68 83 78 69 68 83 76 67 66 78 73 66 65 75 71
DEWPT 68 68 66 67 70 70 68 67 69 70 67 66 69 70 66 65 67 67
RH 74 79 93 97 65 76 97 97 63 82100100 74 90100100 76 87
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B1 B1 B1 B1 B1 SC B1 SC B1 B2 B2 B1 B2 B2 B2 B2 B1
POP 12HR 30 20 30 20 50 50 60 50 30
RAIN SHWRS SC IS SC IS SC SC IS NM SC IS IS SC
TSTMS SC SC 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
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