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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Sat Aug 15 2026
NCZ005-152000-
RAWS 310540
36.38N 79.70W Elev. 858 ft
801 AM EDT Sat Aug 15 2026
Date Sat 08/15/26 Sun 08/16/26 Mon 08/17/26
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 89 72 91 74 95
TEMP 83 88 87 81 75 74 73 74 82 90 90 83 78 76 75 76 88 93 92 84
DEWPT 73 73 74 74 74 73 73 73 75 74 74 74 73 72 71 72 73 72 72 72
MAX/MIN RH 61 100 57 90 49
RH 72 61 65 79 97 97100 97 79 60 60 74 85 87 87 87 61 51 52 67
WIND DIR NE N N SE E SE SE S SW SW SW S SW SW W W W W NW NW
WIND SPD 2 3 3 1 1 1 1 1 3 5 5 3 4 4 4 4 6 8 6 3
CLOUDS SC SC SC B1 B1 SC SC B2 B2 B1 B1 B1 SC FW FW FW SC SC SC SC
CLOUDS(%) 39 45 49 60 54 43 47 79 72 56 54 56 30 21 12 15 29 26 34 44
VSBY 10 10 10 10 10 9 6 5 10 10 10 7 10 10 10 10 10 10 10 10
POP 12HR 20 40 30 20 10
RAIN SHWRS IS IS SC SC IS IS IS IS IS IS
TSTMS IS IS IS IS IS IS IS IS IS
MIX HGT 3 5 4 <1 <1 <1 <1 <1 3 5 4 <1 <1 <1 <1 <1 3 5 4 <1
T WIND DIR N NW NW NE E SE E SE S SW SW S S SW SW SW NW W W E
T WIND SPD 6 6 5 3 9 8 3 5 5 6 9 3 4 5 2 3 11 5 11 2
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 24 44 29 2 4 4 2 6 18 47 34 2 2 3 1 3 41 34 61 1
MAX LVORI 3 1 2 4 6 8 10 8 3 1 1 4 5 6 7 6 1 1 1 3
STABILITY A A A F F F F B B A C F F F F A B B B F
CEILING None None None 1000 500 16100 None None None None
STA PRES 29.39 29.33 29.34 29.31 29.31 29.20 29.17 29.16 29.17 29.10
Date Tue 08/18/26Wed 08/19/26Thu 08/20/26Fri 08/21/26
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 72 92 70 92 72 94 69 87
TEMP 74 73 89 84 72 72 90 85 75 74 92 83 71 70 85 79
DEWPT 70 69 69 67 66 67 69 68 69 70 68 67 66 65 65 65
RH 87 87 52 57 81 84 50 57 82 87 46 59 84 84 51 62
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC FW FW FW SC SC FW FW SC SC SC B1 B1 B1 B1 B1
POP 12HR 10 5 10 5 5 40 40 30
RAIN SHWRS SC SC 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