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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1231 PM EDT Fri Aug 21 2026
NCZ003-212000-
RAWS 310302
36.35N 80.48W Elev. 1076 ft
1231 PM 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 83 67 83 65 83
TEMP 75 75 73 70 69 68 68 74 80 81 74 70 67 66 67 76 82 80 72
DEWPT 68 70 69 69 69 68 68 70 70 70 69 68 66 65 65 64 60 59 59
MAX/MIN RH 81 100 68 98 46
RH 79 84 87 97100100100 87 72 69 84 93 97 97 93 66 47 49 64
WIND DIR E E E E S S SE SW SW SW SW W W NW NW NW NW NW NW
WIND SPD 4 3 3 3 2 2 2 2 2 3 1 2 3 4 5 5 6 5 4
CLOUDS OV B1 OV B2 B2 OV B2 B1 FW SC SC FW FW SC FW CL FW FW CL
CLOUDS(%) 94 63 88 80 82 89 71 53 25 30 46 12 14 32 10 4 11 9 2
VSBY 8 8 8 7 7 7 7 10 10 10 10 10 10 0 10 10 10 10 10
POP 12HR 90 70 30 20 5
RAIN SHWRS IS SC SC NM IS
TSTMS IS IS SC SC
MIX HGT 4 3 <1 <1 <1 <1 <1 2 3 3 <1 <1 <1 <1 <1 3 6 6 <1
T WIND DIR NE E NE NE NE SE SE S SW SW SW SW W W NW NW NW NW NW
T WIND SPD 5 8 5 6 4 1 2 4 5 4 2 1 2 2 2 12 10 9 5
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 20 28 3 3 2 1 2 10 22 19 1 1 1 1 2 56 68 71 3
MAX LVORI 3 3 8 9 9 10 9 5 3 3 6 8 8 8 6 1 1 1 3
STABILITY C B F F F F B B A A F G G F A A B A F
CEILING 1000 1300 5000 None None None None None None
STA PRES 28.97 28.96 28.93 28.92 28.86 28.85 28.84 28.91 28.91
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 60 83 60 81 64 85 66 82
TEMP 62 61 79 73 63 62 79 74 65 66 81 76 68 67 79 73
DEWPT 56 57 58 60 57 57 62 63 63 64 68 69 68 67 71 70
RH 81 87 49 64 81 84 56 69 93 93 65 79100100 77 90
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 10 5 30 50 60
RAIN SHWRS SC SC SC IS 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