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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
631 PM EDT Mon Sep 21 2026
VAZ018-220800-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
631 PM EDT Mon Sep 21 2026
Date 09/21/26 Tue 09/22/26 Wed 09/23/26 Thu
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 68 55 60 53
TEMP 68 66 65 64 64 66 67 65 61 59 58 57 56 58 59 58 56 55 55 55 54
DEWPT 67 65 64 64 63 66 67 65 61 58 57 56 55 57 58 58 56 54 54 53 52
MIN/MAX RH 99 94 99 94 100
RH 97 97 97100 97100100100100 96 96 96 96 96 96100100 96 96 93 93
WIND DIR S SE E E SE E E E E NE NE NE NE NE E E NE NE NE NE NE
WIND SPD 2 2 2 2 2 2 3 3 6 6 8 8 8 6 5 5 6 8 8 8 8
WIND GUST 19 21 24 26 25 20 17 18 21 24 26 26 24
CLOUDS B2 B2 OV B2 B2 OV OV OV OV OV OV B2 OV OV B2 B2 B2 B2 B2 B2 B2
CLOUDS(%) 83 80 88 84 86 93 93 95 95 92 91 79 90 90 85 85 85 87 85 73 84
VSBY 8 3 1 1 1 4 4 4 4 3 5 5 6 6 6 6 10
POP 12HR 90 90 90 80 80
RAIN L D L C D D L L D D L L C
RAIN SHWRS NM NM O O NM SC O O
TSTMS SC IS IS IS IS IS SC SC
MIX HGT <1 <1 <1 <1 <1 1 1 1 1 1 1 1 1 1 2 2 2
T WIND DIR SE E E SE E SE E NE NE NE NE E NE NE NE NE NE
T WIND SPD 8 6 8 4 4 5 6 9 12 11 10 11 10 11 12 12 11
DISPERSION VP VP VP VP PR PR PR PR PR PR PR PR
ADI 4 3 4 2 4 8 10 12 8 8 9 10 16 19 22 22 8
MAX LVORI 8 8 8 8 8 8 7 5 8 6 6 5 5 5 5 5 8
STABILITY F F F F C C C C E E D D D D D D E
CEILING 1100 0 100 100 100 200 200 200 200
STA PRES 27.83 27.86 27.88 27.90 27.95 27.95 28.00 28.01
Date 09/24Fri 09/25/26Sat 09/26/26Sun 09/27/26Mon 09/28/26
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 61 49 70 46 70 48 72 50 74
TEMP 60 54 51 50 67 58 50 47 68 58 51 49 70 60 53 51 72 62
DEWPT 59 53 49 47 52 48 44 43 49 48 46 45 52 51 48 48 57 57
RH 96 96 93 89 59 69 80 86 51 69 83 86 53 72 83 89 59 84
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B1 SC SC SC FW FW FW FW FW FW FW FW SC SC SC SC SC
POP 12HR 30 0 5 5 0 0 5 5 5
RAIN 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