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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
631 AM EDT Thu Sep 17 2026
VAZ024-172000-
RAWS 441631
37.63N 79.51W Elev. 865 ft
631 AM EDT Thu Sep 17 2026
Date Thu 09/17/26 Fri 09/18/26 Sat 09/19/26
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 91 67 86 65 80
TEMP 67 83 90 84 77 73 71 69 71 81 85 82 74 71 69 66 65 72 77 79 73
DEWPT 63 68 67 70 70 69 68 67 68 70 69 70 70 69 67 64 63 62 64 64 65
MAX/MIN RH 47 98 61 95 59
RH 87 61 47 63 79 87 90 93 90 69 59 67 87 93 93 93 93 71 64 60 76
WIND DIR NW N W NW S SW W NW NW N N NE N NE E E NE E SE SE SE
WIND SPD 1 0 2 2 1 1 1 1 1 1 2 2 2 1 1 1 2 2 3 3 1
CLOUDS FW FW B1 SC B2 SC SC SC FW SC B2 B1 B1 B2 B2 B2 B1 B2 B2 B2 B1
CLOUDS(%) 7 10 59 44 75 46 36 33 10 26 70 67 69 77 75 71 68 80 76 70 64
VSBY 10 9 10 10 10 7 6 4 5 6 6 6 10 10 10 10 10 10 10 10 10
POP 12HR 50 5 70 50 20
RAIN SHWRS SC IS NM SC SC SC IS IS IS IS
TSTMS SC IS SC SC IS
MIX HGT <1 2 5 2 <1 <1 <1 <1 <1 3 5 3 <1 <1 1 <1 <1 2 2 2 <1
T WIND DIR NW NW W W W W NW NW NW N N NE E E E E E E SE SE SE
T WIND SPD 2 3 6 10 3 4 4 3 2 11 8 4 4 9 10 10 10 5 4 6 6
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 2 8 43 27 2 2 2 2 2 42 32 14 2 4 5 5 10 16 13 19 3
MAX LVORI 5 3 1 2 4 6 6 7 6 1 1 3 5 6 6 6 5 3 2 2 3
STABILITY A A B B F F G G A A C C F F F F C C C C F
CEILING None 6300 None None None 3100 2800 2600 2200 700
STA PRES 28.74 28.67 28.64 28.61 28.63 28.56 28.58 28.59 28.63 28.58
Date Sun 09/20/26Mon 09/21/26Tue 09/22/26Wed 09/23/26
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 64 88 65 83 62 76 59 74
TEMP 66 65 86 78 69 67 81 73 66 63 74 70 64 60 71 67
DEWPT 66 65 71 70 68 67 70 68 66 63 68 67 63 60 65 65
RH 100100 61 76 97100 69 84100100 82 90 97100 81 93
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 SC SC B1 SC B1 B1 B2 B2 B2 B1 B2 B2 B2 B1 B2
POP 12HR 5 30 20 60 40 60 50 30
RAIN SHWRS SC IS IS NM SC IS IS NM SC SC SC IS
TSTMS 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