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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
601 AM EDT Wed Aug 19 2026
VAZ018-192000-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
601 AM EDT Wed Aug 19 2026
Date Wed 08/19/26 Thu 08/20/26 Fri 08/21/26
UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00
EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20
MAX/MIN TEMP 87 68 84 65 79
TEMP 66 77 85 85 75 71 70 69 69 77 82 80 72 69 68 67 66 72 78 74 68
DEWPT 62 65 65 64 63 63 63 63 64 68 70 69 68 66 66 65 65 69 70 70 67
MAX/MIN RH 48 84 65 98 78
RH 87 67 51 50 66 76 78 81 84 74 67 69 87 90 93 93 97 90 76 87 97
WIND DIR NW W W NW NW W W W W W W W NW NW NW NW N SE SE SE E
WIND SPD 2 3 4 5 3 3 2 2 2 5 8 8 4 3 1 1 1 2 3 2 2
CLOUDS FW FW FW CL SC SC B1 FW SC B1 B2 SC B1 B1 B1 B1 B2 B2 OV OV B2
CLOUDS(%) 9 8 6 5 29 39 60 15 50 53 81 40 52 54 67 67 72 83 92 92 80
VSBY 10 10 10 10 10 10 10 10 7 7 6 7 7 7 6 6 6 6 6 6 6
POP 12HR 0 5 40 50 90
RAIN SHWRS SC SC SC IS SC SC SC SC NM NM O O NM
TSTMS SC IS SC IS IS SC SC SC
MIX HGT <1 4 5 6 <1 <1 <1 <1 <1 3 4 4 <1 <1 <1 <1 <1 2 2 2 <1
T WIND DIR NW NW W W W W W SW SW W W W NW NW N E NE S NE SE NE
T WIND SPD 3 6 6 9 10 2 2 1 2 23 20 12 8 4 3 9 8 3 4 6 5
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 3 34 44 63 5 1 1 1 2 86 90 56 5 2 2 4 10 8 13 14 3
MAX LVORI 6 3 1 1 3 3 4 6 5 3 1 3 5 6 7 6 7 5 4 5 8
STABILITY A A A A G G F G A B B B E F F F B B B B F
CEILING None None None None 7200 None None 11900 1000 0
STA PRES 27.81 27.79 27.78 27.76 27.78 27.77 27.81 27.87 27.93 27.85
Date Sat 08/22/26Sun 08/23/26Mon 08/24/26Tue 08/25/26
UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20
MIN/MAX TEMP 65 82 63 81 60 81 60 83
TEMP 67 65 81 72 66 65 79 71 63 62 79 71 62 62 81 73
DEWPT 65 65 69 65 62 62 65 61 58 59 62 59 57 58 64 63
RH 93100 67 79 87 90 62 71 84 90 56 66 84 87 56 71
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B1 B1 SC SC SC SC FW FW FW FW FW FW SC SC
POP 12HR 70 30 10 10 5 5 20 10
RAIN SHWRS NM IS SC 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