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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 PM EDT Fri Sep 18 2026
VAZ012-190800-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
801 PM EDT Fri Sep 18 2026
Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon
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 79 62 79 61
TEMP 66 64 63 64 71 76 78 69 65 64 63 63 73 78 76 69 65 63 61 63
DEWPT 66 64 63 64 67 66 66 66 65 64 63 63 67 67 68 67 65 63 61 63
MIN/MAX RH 100 66 100 69 100
RH 100100100100 87 71 67 90100100100100 81 69 76 93100100100100
WIND DIR N N N N E SE SE SE SE SE S S SW W W SW SW W W W
WIND SPD 1 0 0 0 1 1 1 2 2 2 2 1 1 1 1 1 1 1 1 1
CLOUDS SC B1 B2 B2 OV B2 B1 B1 B1 B2 B1 SC B1 OV OV B1 B1 SC SC B1
CLOUDS(%) 48 61 81 79 90 76 66 62 66 75 68 50 52 88 88 58 54 48 39 55
VSBY 9 6 4 4 10 10 10 10 10 7 10 7 7 3 3 7
POP 12HR 20 20 10 70 30
RAIN SHWRS IS IS IS IS NM NM SC SC SC
TSTMS IS IS IS SC SC IS
MIX HGT <1 <1 <1 <1 2 4 3 <1 <1 <1 <1 <1 3 5 2 <1
T WIND DIR NW N NE NE E S S SE S S S S W NW SW SW
T WIND SPD 3 2 2 3 4 3 3 8 11 10 11 8 12 16 6 3
DISPERSION VP VP VP VP VP VP VP VP VP VP VP
ADI 2 1 1 3 10 12 11 4 5 5 5 8 38 68 18 2
MAX LVORI 10 10 10 9 5 3 3 6 9 9 9 8 3 1 3 7
STABILITY F F F C C C C F F F F A C C B F
CEILING None 200 200 1900 1600 100 1100 8600 None
STA PRES 27.36 27.34 27.36 27.31 27.32 27.30 27.29 27.24
Date 09/21Tue 09/22/26Wed 09/23/26Thu 09/24/26Fri 09/25/26
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 84 59 74 55 67 51 67 50 70
TEMP 81 70 62 61 69 65 58 56 63 59 54 53 64 58 52 52 66 60
DEWPT 68 66 62 61 67 63 58 56 62 59 53 53 61 58 52 52 59 57
RH 65 87100100 93 93100100 97100 96100 90100100100 78 90
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 OV B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 B1 B1
POP 12HR 90 70 80 70 60 30 40 20 20
RAIN SHWRS SC O NM SC SC O NM SC NM SC SC IS SC SC IS IS IS
TSTMS IS SC IS SC IS IS 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