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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
731 PM EDT Wed Aug 19 2026
VAZ024-200800-
RAWS 441631
37.63N 79.51W Elev. 865 ft
731 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 68 90 65 84 64
TEMP 80 74 72 70 71 83 88 86 77 71 68 66 68 78 83 78 72 69 67 65 67
DEWPT 67 66 66 66 66 68 69 70 69 69 68 66 68 70 71 71 69 68 67 65 67
MIN/MAX RH 91 53 100 67 100
RH 65 76 81 87 84 61 54 59 76 93100100100 76 67 79 90 97100100100
WIND DIR W W NE N N SW W W NW N N N N E E SE N N N N N
WIND SPD 3 1 1 1 0 2 4 3 1 1 0 0 1 1 2 2 0 0 0 0 0
CLOUDS FW CL SC FW SC SC B1 SC SC B1 SC B1 B1 B2 OV OV B2 B2 B2 B2 B1
CLOUDS(%) 9 4 28 15 29 42 57 38 26 53 35 55 65 80 88 88 83 83 72 72 64
VSBY 10 10 9 9 10 10 10 10 10 6 7 7 7 7 10 10 10
POP 12HR 0 40 30 80 70
RAIN SHWRS SC IS SC IS IS SC SC O O NM NM IS IS IS
TSTMS SC IS SC SC SC IS
MIX HGT <1 <1 <1 <1 <1 3 5 4 <1 <1 <1 <1 <1 2 2 2 <1
T WIND DIR W NW NW N E S SW SW N N N N NE N SE S E
T WIND SPD 4 3 2 2 1 11 8 10 12 5 11 6 5 2 1 2 2
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 2 2 1 1 1 41 34 50 6 3 5 3 6 5 3 7 1
MAX LVORI 3 3 4 5 5 1 1 1 4 6 9 9 8 4 3 4 7
STABILITY G G G G A A C A G F G F B B B B F
CEILING None None None None None None 800 1500 4100
STA PRES 28.48 28.49 28.5 28.46 28.51 28.57 28.58 28.54
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 86 62 88 59 86 59 86 62 88
TEMP 85 76 66 66 86 76 64 63 85 75 63 62 84 76 65 65 86 77
DEWPT 70 67 65 64 64 60 61 60 60 59 59 59 63 63 63 64 68 67
RH 61 74 97 93 48 58 90 90 43 58 87 90 49 64 93 97 55 71
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B1 SC FW FW FW FW FW FW FW FW SC FW SC SC SC SC B1
POP 12HR 40 10 5 0 5 10 20 10 40
RAIN SHWRS IS SC IS IS SC
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