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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
531 AM EDT Wed Sep 23 2026
VAZ018-232000-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
531 AM EDT Wed Sep 23 2026
Date Wed 09/23/26 Thu 09/24/26 Fri 09/25/26
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 58 50 63 43 71
TEMP 55 55 55 55 53 55 55 53 52 55 60 62 55 50 48 46 45 60 71 70 58
DEWPT 54 53 53 54 52 51 49 48 47 49 49 47 48 45 43 41 40 43 43 43 43
MAX/MIN RH 92 98 58 86 37
RH 96 93 93 96 96 86 80 83 83 80 67 58 77 83 83 83 82 53 36 38 57
WIND DIR E E E E E NE NE NE NE NE E NE NE NE N N NW N N N N
WIND SPD 8 6 6 6 6 8 8 8 8 5 4 4 3 4 4 4 4 4 5 5 5
WIND GUST 25 20 18 18 21 23 24 25 24 17 14 16 14 17 14 16
CLOUDS B2 OV B2 OV B2 OV OV OV B2 B2 B2 B1 CL FW FW CL CL CL FW CL CL
CLOUDS(%) 87 88 83 88 85 93 93 89 83 86 86 62 3 17 10 2 3 3 6 4 5
VSBY 2 4 4 4 4 3 5 7 6 9 10 10 10 10 10 10
POP 12HR 50 60 40 0 0
RAIN C C L C C C C
RAIN SHWRS SC SC
Obvis PF PF PF PF
MIX HGT 1 1 2 2 1 1 1 1 1 2 3 3 <1 <1 <1 <1 <1 2 4 5 <1
T WIND DIR NE NE NE NE NE NE NE NE NE NE N NE NE NE N NW NW NW N NW NW
T WIND SPD 14 13 14 13 11 12 13 12 10 6 10 11 5 4 4 4 4 12 12 14 10
DISPERSION PR PR PR PR VP VP VP VP PR
ADI 21 21 25 24 8 14 15 14 15 13 23 30 3 2 2 2 5 39 61 80 5
MAX LVORI 5 5 5 5 6 4 4 4 4 4 3 2 4 5 5 5 4 1 1 1 3
STABILITY D D D D E D D D D D D D G F F F B B B B F
CEILING 200 200 200 200 200 None None None None None
STA PRES 28.03 28.03 28.02 28.00 28.01 27.95 27.94 27.88 27.85 27.80
Date Sat 09/26/26Sun 09/27/26Mon 09/28/26Tue 09/29/26
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 45 75 48 73 50 75 50 79
TEMP 49 46 74 60 51 49 71 60 53 51 73 62 54 51 76 66
DEWPT 41 41 46 47 45 45 49 48 47 46 53 51 49 48 58 57
RH 74 83 37 62 80 86 46 64 80 83 49 67 83 89 54 73
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS CL CL CL CL CL FW FW FW FW FW FW FW FW FW FW FW
POP 12HR 0 0 0 0 0 0 0 0
$$
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