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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
531 PM EDT Wed Sep 2 2026
VAZ046-030800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
531 PM EDT Wed Sep 2 2026
Date 09/02/26 Thu 09/03/26 Fri 09/04/26 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 72 99 74 97 71
TEMP 87 81 78 76 76 88 95 97 89 79 76 74 77 88 94 96 87 77 74 72 72
DEWPT 71 70 70 69 70 70 68 67 71 70 70 69 70 69 67 69 69 70 70 69 70
MIN/MAX RH 88 38 84 41 95
RH 59 69 76 79 82 55 42 38 56 74 82 84 79 54 41 42 55 79 87 90 93
WIND DIR SE S W W W W W W S SW W W W W W NW NW NE NW N N
WIND SPD 2 2 1 1 2 3 3 4 3 3 3 4 4 5 6 8 3 2 2 2 3
CLOUDS SC FW FW CL CL CL FW SC SC SC FW CL CL FW SC SC B1 B1 SC SC SC
CLOUDS(%) 39 13 22 3 2 2 6 36 38 37 20 0 1 11 35 35 51 51 36 33 33
VSBY 10 10 9 5 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 5 20 30 20 30
RAIN SHWRS IS IS IS IS IS SC SC
TSTMS IS IS IS IS SC SC
MIX HGT <1 <1 <1 <1 <1 4 8 6 <1 <1 <1 <1 <1 4 7 5 <1
T WIND DIR S SE S S SW NW W W W NW W W SW W W W NW
T WIND SPD 8 4 3 2 2 10 8 6 2 1 2 2 4 16 17 20 8
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 4 2 2 1 2 49 73 49 1 1 1 1 4 73133119 4
MAX LVORI 3 3 4 4 5 1 1 1 3 4 5 5 5 1 1 1 3
STABILITY G G G G A A A A G G G F A A B B F
CEILING None None None None None None None None None
STA PRES 29.33 29.31 29.33 29.26 29.26 29.27 29.26 29.17
Date 09/05Sun 09/06/26Mon 09/07/26Tue 09/08/26Wed 09/09/26
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 90 65 82 61 82 62 86 65 89
TEMP 89 79 69 65 79 74 63 63 79 75 65 64 84 78 67 66 87 81
DEWPT 72 70 66 64 65 63 61 62 63 62 61 62 65 63 62 62 65 65
RH 57 74 90 97 62 69 93 97 58 64 87 93 53 60 84 87 48 58
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC B2 B1 B1 SC SC FW SC SC SC SC SC SC SC SC SC FW FW
POP 12HR 60 50 20 20 10 10 10 10 5
RAIN SHWRS NM SC IS IS
TSTMS SC SC
$$
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
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