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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 PM EDT Sun Sep 20 2026
VAZ012-210800-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
801 PM EDT Sun Sep 20 2026
Date 09/20/26 Mon 09/21/26 Tue 09/22/26 Wed
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 61 82 60 75 54
TEMP 65 64 62 63 77 82 78 69 64 63 62 62 70 75 71 65 62 60 58 55
DEWPT 64 63 62 63 67 67 67 66 64 63 62 62 66 67 66 64 62 60 58 55
MIN/MAX RH 100 59 100 76 100
RH 97 97100100 71 61 69 90100100100100 87 76 84 97100100100100
WIND DIR SW W W W W SW SW E SE SE S S SW W NE E E E E E
WIND SPD 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 3 3 3 3
CLOUDS B2 SC SC SC B1 B2 B2 B1 B2 B2 B2 B2 OV OV OV OV OV B2 B2 B2
CLOUDS(%) 71 33 30 47 61 82 82 65 80 74 84 79 91100100 98 98 84 80 80
VSBY 7 7 5 2 7 6 6 7 5 3 5 2 8 3 3 6 6 6 6 3
POP 12HR 5 70 70 90 80
RAIN SHWRS IS IS NM NM SC NM NM SC SC SC O O O O NM NM NM
TSTMS IS SC SC IS SC SC SC
Obvis PF PF
MIX HGT <1 <1 <1 <1 2 4 2 <1 <1 <1 <1 <1 2 3 2 <1
T WIND DIR S SW W W W SW SW SE E SE SE SE SE E E E
T WIND SPD 4 4 5 3 8 5 5 6 8 5 4 2 3 1 5 9
DISPERSION VP VP VP VP VP VP VP VP VP VP VP
ADI 2 2 3 3 20 22 12 3 4 3 2 2 7 3 10 4
MAX LVORI 8 8 9 9 3 2 3 6 9 9 9 10 5 4 4 7
STABILITY F G G A C C C F F F F C C D D F
CEILING None None 600 2100 1000 100 100 100 200
STA PRES 27.23 27.24 27.26 27.21 27.28 27.28 27.31 27.31
Date 09/23Thu 09/24/26Fri 09/25/26Sat 09/26/26Sun 09/27/26
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 64 49 62 47 66 44 70 44 73
TEMP 64 59 54 52 59 56 50 49 63 57 48 46 66 57 47 45 68 59
DEWPT 61 58 54 52 59 56 50 48 55 52 46 45 50 50 45 44 51 53
RH 90 96100100100100100 96 75 83 93 96 56 77 93 96 54 80
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B2 B2 B2 B2 B1 B1 B1 SC SC SC SC SC FW FW SC SC
POP 12HR 70 70 30 10 10 5 5 0 5
RAIN SHWRS NM NM NM SC 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