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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
301 AM EDT Mon Sep 21 2026
VAZ018-212000-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
301 AM EDT Mon Sep 21 2026
Date Mon 09/21/26 Tue 09/22/26 Wed 09/23/26
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 82 64 74 57 62
TEMP 68 69 76 80 80 75 71 68 67 65 70 72 69 64 62 61 59 57 60 61 61 56
DEWPT 63 64 67 67 69 68 66 66 65 65 69 70 69 64 61 60 58 57 60 61 61 56
MAX/MIN RH 67 100 90 100 96
RH 84 84 74 65 69 79 84 93 93100 97 93100100 97 97 96100100100100100
WIND DIR W NW S S S SE SE E E E E E E E E E NE NE E E NE NE
WIND SPD 2 1 3 3 2 3 4 2 2 2 2 3 3 6 6 6 8 8 6 5 5 6
WIND GUST 19 21 23 25 25 19 18 18 21
CLOUDS B1 B2 B2 B2 OV OV OV OV OV OV OV OV OV OV OV B2 B2 OV OV B2 B2 B2
CLOUDS(%) 67 83 81 82 92 88 95 95 91 91 92 89 91 94 94 83 78 90 90 86 84 85
VSBY 1 1 9 8 8 7 3 2 2 2 2 3 3 6 6 6 6 6 6 6 6 10
POP 12HR 60 80 90 90 80
RAIN D D L L D D D D D
RAIN SHWRS SC SC SC NM O O NM SC SC SC NM O
TSTMS IS SC SC SC IS SC IS
Obvis PF PF
MIX HGT <1 <1 2 2 1 <1 <1 <1 <1 <1 1 2 1 1 1 1 1 1 2 2 2 2
T WIND DIR NW NE E SE E E SE E E E NE NE NE NE NE NE NE NE NE NE NE NE
T WIND SPD 2 1 5 6 4 5 6 6 6 5 8 9 12 10 12 13 12 12 13 12 11 14
DISPERSION VP VP VP VP VP PR PR PR PR PR
ADI 1 1 13 19 8 3 5 3 3 4 12 20 21 7 8 9 14 20 23 22 21 10
MAX LVORI 5 6 4 3 3 5 5 6 6 9 6 5 5 8 8 6 5 5 5 5 5 7
STABILITY F C C C C F E F F C C C C E E E D D D D D E
CEILING 300 700 300 0 100 100 100 100 200 200
STA PRES 27.82 27.79 27.82 27.83 27.88 27.89 27.93 27.95 28.01 28.01
Date Thu 09/24/26Fri 09/25/26Sat 09/26/26Sun 09/27/26
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 53 62 50 69 48 70 49 71
TEMP 56 53 60 54 52 51 67 58 51 49 67 58 52 50 69 59
DEWPT 54 52 59 53 49 48 52 49 45 44 50 49 47 47 54 52
RH 93 96 96 96 89 89 59 72 80 83 54 72 83 89 59 78
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B2 B2 B1 B1 SC SC SC FW FW FW FW SC SC SC
POP 12HR 80 30 10 10 10 0 0 0
RAIN D C C
$$
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