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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
831 AM EDT Tue Jul 21 2026
VAZ012-212000-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
831 AM EDT Tue Jul 21 2026
Date Tue 07/21/26 Wed 07/22/26 Thu 07/23/26
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 79 69 79 55 77
TEMP 77 79 78 74 71 70 69 69 72 76 79 72 64 59 56 58 68 73 76 70
DEWPT 70 69 69 68 67 68 68 67 69 67 66 65 62 59 56 58 61 61 61 61
MAX/MIN RH 70 95 65 100 60
RH 79 72 74 82 87 93 97 93 90 74 64 79 93100100100 78 66 60 73
WIND DIR W W SW W SW W W W W W W NW N N N N E E E E
WIND SPD 5 5 4 4 4 4 4 3 3 3 3 2 2 1 1 1 2 1 1 2
WIND GUST 16 14 14 16 16
CLOUDS B1 B2 B1 B2 B2 OV B2 B1 B2 B1 B2 SC SC B1 B1 B1 B1 B1 B1 SC
CLOUDS(%) 65 79 56 75 85 90 86 58 73 69 72 39 49 52 58 60 56 55 52 33
VSBY 7 6 7 3 3 3 6 7 9 9 10 10 10 10 10 7 7 7 7 7
POP 12HR 60 90 70 10 30
RAIN SHWRS SC NM SC NM O O O SC NM SC NM SC SC
TSTMS SC NM SC SC SC SC IS IS SC SC
MIX HGT 3 3 3 1 <1 <1 <1 1 2 4 3 <1 <1 <1 <1 1 3 4 4 1
T WIND DIR W SW SW S SW SW W W SW NW NW N N N N NE E SE E E
T WIND SPD 14 20 24 8 8 8 12 19 11 14 10 9 9 6 4 10 5 2 4 10
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 44 69 87 5 5 5 8 27 34 65 40 4 4 3 2 14 22 10 22 5
MAX LVORI 3 1 1 3 6 6 8 4 4 3 1 4 6 9 9 5 3 3 2 3
STABILITY C C B E E E E B B B B G F F F A B B B G
CEILING 1300 5000 2000 700 1200 1700 None 1600 None None
STA PRES 27.18 27.15 27.11 27.11 27.15 27.17 27.21 27.25 27.30 27.29
Date Fri 07/24/26Sat 07/25/26Sun 07/26/26Mon 07/27/26
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 54 76 58 77 60 83 61 84
TEMP 58 58 72 69 62 60 72 71 63 63 78 74 64 64 79 75
DEWPT 57 58 61 62 60 60 65 65 62 63 66 66 63 64 66 65
RH 96100 68 78 93100 79 81 97100 67 76 97100 64 71
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC B1 B1 B1 B1 B2 B2 B2 B1 SC B1 B1 B1 SC SC B1
POP 12HR 10 30 60 60 30 40 30 40
RAIN SHWRS IS SC SC NM NM NM SC IS SC SC SC IS IS SC
TSTMS IS IS SC IS IS 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