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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
631 PM EDT Sun Aug 16 2026
VAZ018-170800-
RAWS 444002
37.56N 80.18W Elev. 2702 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 85 67 84 63
TEMP 75 74 73 72 72 80 85 82 74 72 70 69 69 79 83 81 71 68 65 64 66
DEWPT 70 69 68 68 68 71 71 70 69 68 67 66 66 68 67 66 63 61 60 60 61
MIN/MAX RH 94 63 94 58 91
RH 84 84 84 87 87 74 63 67 84 87 90 90 90 69 59 60 76 78 84 87 84
WIND DIR W W W W NW NW W W W W NW NW NW NW NW NW NW NW NW NW NW
WIND SPD 4 5 6 6 6 6 6 6 4 3 3 2 3 3 4 5 3 2 1 1 2
WIND GUST 16 20 21 24 25 21 18 19 16 13 16 13
CLOUDS B1 B1 B1 B1 SC SC B1 B1 B2 B2 SC SC FW SC SC FW FW CL CL FW FW
CLOUDS(%) 58 66 67 65 38 43 52 58 70 76 50 35 21 37 29 17 8 5 4 7 8
VSBY 10 9 7 6 4 10 10 10 10 8 6 7 10 10 10 10 10 10 10 10
POP 12HR 40 30 20 5 0
RAIN SHWRS SC SC SC IS IS SC IS IS
TSTMS SC IS SC
Obvis F F+
MIX HGT <1 <1 <1 <1 1 3 4 4 <1 <1 <1 <1 <1 3 5 6 <1
T WIND DIR SW NW W W NW NW NW W NW NW NW NW NW N W W NW
T WIND SPD 11 14 10 6 13 17 14 13 12 5 8 5 6 8 9 11 13
DISPERSION VP PR PR PR VP VP VP VP VP VP VP VP
ADI 8 10 7 5 21 61 74 70 8 3 4 3 8 35 58 79 6
MAX LVORI 4 4 4 5 4 3 1 1 4 6 6 6 5 3 1 1 3
STABILITY E E E E B B B B E F F G A A A A G
CEILING 3100 None None 9100 2600 None None None None
STA PRES 27.79 27.76 27.78 27.75 27.78 27.77 27.79 27.76
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 88 67 85 65 79 63 79 63 81
TEMP 87 78 70 69 83 74 68 66 77 71 66 64 77 71 65 65 79 71
DEWPT 65 64 62 63 69 67 64 63 67 65 62 62 67 64 61 61 65 61
RH 48 62 76 81 63 79 87 90 71 81 87 93 71 79 87 87 62 71
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW SC SC B1 B1 B1 B1 B2 B1 B1 B1 B1 SC B1 SC SC
POP 12HR 0 5 40 40 60 50 40 20 20
RAIN SHWRS IS SC SC SC SC NM SC SC SC 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