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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
401 PM EDT Wed Oct 21 2026
VAZ018-220800-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
401 PM EDT Wed Oct 21 2026
Date 10/21/26 Thu 10/22/26 Fri 10/23/26 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 40 68 40 64 39
TEMP 65 55 50 46 44 42 56 64 66 56 51 47 45 42 57 64 62 49 45 42 40 40
DEWPT 38 43 44 41 41 37 38 34 37 39 37 37 39 41 50 50 48 46 45 42 40 39
MIN/MAX RH 98 31 100 58 100
RH 37 64 80 83 89 82 51 32 34 53 59 68 79 96 77 60 60 89100100100 96
WIND DIR N NW N NW NW NW N N NW NW NW NW NW NW NE E E SE SE E N NE
WIND SPD 3 4 3 3 4 5 4 3 4 5 3 3 2 2 3 3 3 2 1 1 0 1
WIND GUST 16 18
CLOUDS CL CL CL CL FW FW CL CL CL CL CL FW FW FW CL FW CL CL FW FW FW FW
CLOUDS(%) 0 0 0 0 7 9 5 0 0 0 0 9 13 12 4 8 3 3 6 8 8 19
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 7 10 10 10 10 10 10
POP 12HR 0 0 0 0 0
MIX HGT 3 <1 <1 <1 <1 <1 1 3 3 <1 <1 <1 <1 <1 2 4 3 <1
T WIND DIR NW W NW NW NW NW NW NW NW NW NW NW NW N NE NE NE E
T WIND SPD 8 2 3 4 4 6 9 8 11 6 5 4 4 3 9 6 6 9
DISPERSION VP VP VP VP PR VP VP VP VP VP VP VP
ADI 27 1 2 2 2 7 17 32 41 3 3 2 2 4 27 31 29 4
MAX LVORI 2 3 5 5 6 4 2 1 1 2 3 3 4 9 3 1 2 6
STABILITY B F G G F B B B B F G G G B B B B G
CEILING None None None None None None None None None
STA PRES 27.90 27.88 27.90 27.89 27.94 27.98 28.05 28.06
Date 10/24Sun 10/25/26Mon 10/26/26Tue 10/27/26Wed 10/28/26
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 60 38 62 39 69 43 69 47 64
TEMP 59 49 41 40 61 51 43 41 67 55 46 44 68 58 50 48 63 55
DEWPT 43 42 40 39 46 45 42 39 45 45 43 42 50 49 47 47 51 50
RH 55 77 96 96 58 80 96 92 45 69 89 93 52 72 89 96 65 83
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW CL CL FW FW FW CL FW FW FW FW SC SC SC SC B1 B1 SC
POP 12HR 0 0 0 0 0 0 0 0 5
$$
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