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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
301 PM EDT Mon Aug 17 2026
VAZ046-180800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
301 PM EDT Mon Aug 17 2026
Date 08/17/26 Tue 08/18/26 Wed 08/19/26 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 70 90 67 91 70
TEMP 92 81 75 73 72 73 83 88 89 80 74 72 70 71 82 89 91 83 76 72 70 72
DEWPT 72 72 71 70 70 71 72 71 70 70 69 67 65 66 67 67 64 65 66 67 66 68
MIN/MAX RH 97 54 90 41 88
RH 52 74 87 90 93 93 70 57 54 72 84 84 84 84 61 48 41 55 71 84 87 87
WIND DIR W W W W W N N N N NE NE N N N W W W S S SW W NE
WIND SPD 6 4 3 2 3 3 4 3 3 2 3 2 2 2 2 4 4 1 2 2 2 2
CLOUDS SC B2 B1 B1 SC SC SC SC SC SC SC B1 SC SC FW CL CL FW SC FW SC SC
CLOUDS(%) 49 80 62 54 46 35 38 41 33 29 28 59 43 43 15 5 5 7 28 21 43 35
VSBY 10 7 7 7 3 7 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 30 20 5 0 5
RAIN SHWRS SC IS IS
TSTMS IS IS
Obvis F
MIX HGT 6 <1 <1 <1 <1 <1 4 5 4 <1 <1 <1 <1 <1 4 6 7 <1
T WIND DIR W NW NW NW N NE NE SE W N N N N N N N NW E
T WIND SPD 11 11 6 2 3 11 6 3 2 1 2 2 3 13 11 5 4 1
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 74 8 3 1 2 11 32 20 13 1 1 1 2 13 53 41 39 1
MAX LVORI 1 3 6 7 7 5 3 2 2 4 5 6 6 4 1 1 1 3
STABILITY B E F F F A A A A G G F F A A A A G
CEILING 5700 None None None None None None None None
STA PRES 29.20 29.21 29.23 29.18 29.20 29.20 29.23 29.20
Date 08/20Fri 08/21/26Sat 08/22/26Sun 08/23/26Mon 08/24/26
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 91 67 85 66 83 66 85 63 84
TEMP 91 81 71 68 82 75 68 68 80 75 68 68 83 75 66 65 81 75
DEWPT 70 71 70 68 72 70 68 68 72 70 68 67 67 64 63 62 63 61
RH 50 72 97100 72 84100100 77 84100 97 59 69 90 90 54 62
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC B2 B2 B1 B1 B2 B2 B2 B1 B1 B1 SC SC SC FW SC FW FW
POP 12HR 60 60 60 70 50 30 20 10 5
RAIN SHWRS NM NM SC IS NM NM SC IS SC SC IS IS
TSTMS SC SC SC 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
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