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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
631 PM EDT Sun Aug 16 2026
VAZ024-170800-
RAWS 441631
37.63N 79.51W Elev. 865 ft
631 PM EDT Sun Aug 16 2026
Date 08/16/26 Mon 08/17/26 Tue 08/18/26 Wed
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 69 92 67 90 64
TEMP 80 76 73 72 73 85 90 89 81 75 72 69 70 84 89 88 78 72 67 64 67
DEWPT 73 72 71 69 71 72 71 71 70 70 69 67 68 69 67 66 64 64 63 61 63
MIN/MAX RH 100 50 98 47 94
RH 79 87 93 90 93 65 54 56 69 84 90 93 93 61 48 48 62 76 87 90 87
WIND DIR SW SW W W W W W W W W W N N NW NW NW NW N N N N
WIND SPD 3 2 2 3 3 5 5 5 3 1 1 0 1 2 3 3 2 1 0 0 0
WIND GUST 13 16
CLOUDS B1 B1 B1 B1 SC SC B1 B1 SC B2 SC SC SC SC SC SC FW FW FW FW FW
CLOUDS(%) 52 63 68 57 44 30 57 53 35 76 47 50 44 34 34 33 17 12 12 16 11
VSBY 10 8 7 6 8 10 10 10 10 6 7 4 10 10 10 10 10 10 10 10
POP 12HR 40 30 20 10 0
RAIN SHWRS SC SC IS IS IS IS
TSTMS SC IS IS
Obvis F
MIX HGT <1 <1 <1 <1 <1 4 5 4 <1 <1 <1 <1 <1 3 5 7 <1
T WIND DIR S NW W W W NW NW NW NW NW W NW N NE W W NW
T WIND SPD 10 13 6 5 9 13 12 13 8 4 2 2 2 3 5 8 3
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 5 6 3 3 9 63 81 64 4 2 1 1 2 15 37 64 2
MAX LVORI 4 5 6 6 6 1 1 1 3 5 7 8 6 2 1 1 3
STABILITY F F F F A A A A G F F F A A A A G
CEILING 3700 None None None 5300 3600 None None None
STA PRES 28.47 28.45 28.47 28.43 28.47 28.46 28.48 28.44
Date 08/19Thu 08/20/26Fri 08/21/26Sat 08/22/26Sun 08/23/26
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 93 67 91 65 81 63 84 62 86
TEMP 91 84 72 70 89 81 69 66 81 73 66 65 82 75 65 65 85 76
DEWPT 65 65 65 66 68 68 67 65 66 65 65 64 67 66 64 64 65 63
RH 42 53 79 87 50 65 93 97 60 76 97 97 61 74 97 97 51 64
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW SC SC B1 B1 B1 B1 B1 B2 B1 B1 B1 B1 B1 B1 SC
POP 12HR 0 5 40 30 50 60 40 20 20
RAIN SHWRS SC SC SC IS SC NM SC IS SC IS IS
TSTMS SC IS SC 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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