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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
431 PM EDT Tue Sep 1 2026
VAZ046-020800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
431 PM EDT Tue Sep 1 2026
Date 09/01/26 Wed 09/02/26 Thu 09/03/26 Fri
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 73 96 72 98 74
TEMP 94 86 81 78 76 76 87 93 95 86 81 77 75 75 88 94 96 88 79 76 74 75
DEWPT 67 68 68 68 68 69 70 70 70 71 70 69 70 70 70 69 68 70 70 70 69 70
MIN/MAX RH 83 44 93 40 87
RH 41 55 65 71 76 79 57 47 45 61 69 76 84 84 55 44 40 55 74 82 84 84
WIND DIR W SW W W W W N S S S S W W S W W W SW SW W W W
WIND SPD 4 2 2 1 1 1 0 2 2 2 2 1 2 1 3 5 5 3 3 3 3 4
CLOUDS SC FW FW FW CL FW CL FW SC FW FW FW FW FW CL FW FW SC SC FW FW CL
CLOUDS(%) 43 11 12 19 5 6 3 6 29 12 15 11 7 10 3 10 18 45 43 10 7 1
VSBY 10 10 10 10 8 9 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 5 10 5 20
RAIN SHWRS IS IS
TSTMS IS IS
MIX HGT 6 <1 <1 <1 <1 <1 4 7 6 <1 <1 <1 <1 <1 3 7 7 <1
T WIND DIR W W W W W W N NW SW SE S W W W NW W W W
T WIND SPD 9 3 3 2 2 2 0 1 1 2 2 2 3 1 4 8 9 3
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 71 2 2 1 1 2 0 10 9 1 1 1 2 1 17 65 76 2
MAX LVORI 1 3 3 3 4 4 3 2 2 3 3 4 5 5 2 1 1 3
STABILITY A G G G G A A A A G G G G A A A A F
CEILING None None None None None None None None None
STA PRES 29.31 29.34 29.35 29.29 29.29 29.31 29.33 29.26
Date 09/04Sat 09/05/26Sun 09/06/26Mon 09/07/26Tue 09/08/26
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 97 70 90 64 85 62 84 62 85
TEMP 96 85 74 71 86 79 69 65 83 77 64 64 81 77 66 64 83 77
DEWPT 70 71 70 70 71 69 65 63 63 62 61 62 64 63 62 62 63 62
RH 43 63 87 97 61 72 87 93 51 60 90 93 56 62 87 93 51 60
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW SC SC SC SC B1 B1 B1 SC SC SC SC SC B1 SC SC SC SC
POP 12HR 20 10 50 30 10 20 20 10 10
RAIN SHWRS IS SC SC IS IS
TSTMS IS SC 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
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