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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Fri Aug 21 2026
NCZ005-212000-
RAWS 310540
36.38N 79.70W Elev. 858 ft
801 AM EDT Fri Aug 21 2026
Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26
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 85 67 84 66 85
TEMP 77 83 81 74 71 70 69 69 75 82 82 75 71 68 66 68 79 84 82 74
DEWPT 69 70 71 72 71 70 69 69 72 72 71 71 70 68 66 67 67 64 61 62
MAX/MIN RH 65 100 68 100 48
RH 76 65 72 93100100100100 90 72 69 87 97100100 97 67 51 49 66
WIND DIR NE E E E SE S S S SW W SW SE SW W W W NW NW NW NW
WIND SPD 6 5 4 3 2 1 1 1 2 3 3 2 2 2 3 3 5 6 5 3
CLOUDS B2 B1 B1 B2 B2 OV B2 B2 B1 B1 B1 SC SC SC SC FW FW FW FW FW
CLOUDS(%) 70 65 60 87 70 91 76 81 65 61 66 38 33 30 29 16 9 13 10 8
VSBY 10 10 10 8 5 4 7 5 10 10 10 10 10 10 0 10 10 10 10 10
POP 12HR 60 80 40 10 0
RAIN SHWRS SC SC O NM SC IS SC SC
TSTMS SC SC SC SC IS SC SC
MIX HGT 2 3 3 <1 1 <1 <1 <1 2 3 4 <1 <1 <1 <1 <1 3 6 7 <1
T WIND DIR NE NE NE NE NE E SE S S S SW NE S SW SW W NW W W W
T WIND SPD 10 9 6 5 3 3 2 11 9 8 3 1 1 2 3 3 10 10 8 4
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 25 38 22 3 2 2 1 13 24 33 15 1 1 1 2 3 41 67 64 2
MAX LVORI 3 3 3 6 10 10 10 5 4 3 3 6 9 10 10 8 1 1 1 3
STABILITY C B C F F F F B B B B G G G G A A B A G
CEILING 2700 4600 1900 1100 800 2600 None None None None
STA PRES 29.30 29.29 29.28 29.25 29.23 29.17 29.16 29.14 29.21 29.20
Date Mon 08/24/26Tue 08/25/26Wed 08/26/26Thu 08/27/26
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 61 84 61 83 64 85 67 84
TEMP 64 63 83 76 64 62 81 76 67 66 83 77 69 69 82 76
DEWPT 57 58 59 61 58 58 64 65 64 66 70 70 69 68 72 72
RH 78 84 44 60 81 87 56 69 90100 65 79100 97 72 87
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW SC SC SC SC SC SC SC SC B1 B1 B1 B1 B2
POP 12HR 0 5 5 5 10 30 50 60
RAIN SHWRS SC SC SC SC NM
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