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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1001 PM EDT Wed Aug 19 2026
VAZ018-200800-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
1001 PM EDT Wed Aug 19 2026
Date 08/19/26 Thu 08/20/26 Fri 08/21/26 Sat
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 67 85 65 80 65
TEMP 70 69 68 69 78 82 81 72 70 67 66 67 74 79 75 69 68 67 65 66
DEWPT 64 64 65 64 68 69 69 67 66 65 65 66 70 71 71 68 66 65 65 65
MIN/MAX RH 93 64 96 76 98
RH 81 84 90 84 71 65 67 84 87 93 97 97 87 77 87 97 93 93100 97
WIND DIR NW W N W W W W NW NW NW N NE SE SE SE E N N N W
WIND SPD 2 1 0 2 4 5 5 3 1 1 0 1 2 3 2 1 0 0 0 1
WIND GUST 14
CLOUDS FW SC FW FW SC B1 SC B1 SC B1 B1 B2 B2 OV OV B2 B2 B2 B1 B1
CLOUDS(%) 19 35 11 24 50 62 27 52 35 52 52 71 81 92 92 76 78 72 62 55
VSBY 10 8 8 5 10 10 10 10 8 7 7 3 6 10 10 10
POP 12HR 0 40 30 90 60
RAIN SHWRS IS SC SC IS SC SC NM NM O O NM NM IS
TSTMS SC IS SC SC SC
MIX HGT <1 <1 <1 <1 4 4 4 <1 <1 <1 <1 <1 1 2 2 <1
T WIND DIR W NW NW SE SW W W NW NW N NE E N S S SE
T WIND SPD 3 2 1 1 12 8 9 8 3 2 4 3 0 3 4 5
DISPERSION VP VP VP VP VP VP VP VP VP VP VP
ADI 2 1 1 1 59 32 45 4 2 1 2 4 0 10 11 3
MAX LVORI 3 4 6 5 3 3 1 5 7 7 8 8 6 4 5 8
STABILITY G G G A A C A F G F F B B B B F
CEILING None None None None None 1000 1900 700
STA PRES 27.78 27.80 27.78 27.81 27.85 27.86 27.82
Date 08/22Sun 08/23/26Mon 08/24/26Tue 08/25/26Wed 08/26/26
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 83 63 82 60 81 59 83 63 84
TEMP 82 72 66 65 80 71 62 62 79 70 61 62 80 72 66 66 82 73
DEWPT 69 64 62 62 64 60 58 58 60 57 56 57 63 62 60 62 67 65
RH 65 76 87 90 58 68 87 87 52 63 84 84 56 71 81 87 61 76
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC B1 FW FW FW FW FW FW FW FW FW SC SC SC SC SC SC B1
POP 12HR 30 5 5 0 20 5 20 20 40
RAIN SHWRS IS SC IS IS IS IS SC
TSTMS SC IS 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