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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
401 PM EDT Wed Sep 9 2026
VAZ046-100800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
401 PM EDT Wed Sep 9 2026
Date 09/09/26 Thu 09/10/26 Fri 09/11/26 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 68 93 68 85 68
TEMP 88 79 74 72 70 70 83 91 91 81 76 73 70 70 78 82 84 78 71 69 68 69
DEWPT 64 64 63 63 63 64 67 68 67 67 67 68 68 69 70 70 70 69 69 69 68 69
MIN/MAX RH 82 44 97 60 100
RH 45 60 69 73 78 81 59 47 45 63 74 84 93 97 76 67 63 74 93100100100
WIND DIR SW S S SW SW SW W W W W W W N NE NE NE NE NE NE NE NE NE
WIND SPD 8 8 9 9 9 8 9 10 10 5 4 3 3 3 5 6 6 4 3 2 3 3
WIND GUST 19 21 20
CLOUDS FW FW FW FW CL FW FW SC SC SC SC FW SC SC B1 B1 B1 B2 B2 B2 B2 B2
CLOUDS(%) 24 12 9 11 5 6 13 43 35 43 27 25 27 45 60 63 63 77 77 82 84 81
VSBY 10 10 10 10 10 10 10 10 10 10 10 7 10 10 10 6 6 6 6 6 6
POP 12HR 0 5 20 50 70
RAIN SHWRS IS SC SC NM NM SC SC SC
TSTMS IS IS IS IS
MIX HGT 7 <1 <1 <1 <1 <1 3 6 7 <1 <1 <1 <1 <1 3 3 3 <1
T WIND DIR SW S SW SW SW SW W W SW W SW W W NW NE NE NE NE
T WIND SPD 12 6 8 8 8 14 14 11 13 9 4 3 3 2 6 9 12 9
DISPERSION PR PR PR PR PR VP VP VP VP VP VP VP
ADI 91 5 5 5 5 16 50 52 64 6 2 2 2 2 17 24 28 6
MAX LVORI 1 3 3 3 4 4 1 1 1 3 3 5 7 8 3 3 2 4
STABILITY B E E E E B C C C E F G G B D D D E
CEILING None None None None None None 2500 800 1100
STA PRES 29.38 29.35 29.32 29.22 29.26 29.28 29.32 29.31
Date 09/12Sun 09/13/26Mon 09/14/26Tue 09/15/26Wed 09/16/26
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 83 68 88 67 89 66 89 68 92
TEMP 79 77 70 70 85 79 70 68 86 79 69 67 86 80 71 70 90 82
DEWPT 74 73 70 70 73 72 69 68 70 68 67 67 69 69 68 69 71 70
RH 85 87100100 67 79 97100 59 69 93100 57 69 90 97 54 67
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B2 B2 B1 SC SC SC SC SC SC FW SC FW FW FW FW FW
POP 12HR 70 60 20 10 5 5 10 10 20
RAIN SHWRS SC NM NM IS IS IS
TSTMS IS SC SC IS IS
$$
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