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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
631 AM EDT Mon Jul 20 2026
VAZ012-202000-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
631 AM EDT Mon Jul 20 2026
Date Mon 07/20/26 Tue 07/21/26 Wed 07/22/26
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 81 64 85 64 81
TEMP 67 75 80 79 74 70 69 68 71 76 79 83 77 70 68 66 65 72 76 79 72
DEWPT 65 68 68 68 69 68 68 67 68 71 70 69 68 67 66 65 65 69 66 65 63
MAX/MIN RH 65 99 63 100 62
RH 93 79 67 69 84 93 97 97 90 85 74 63 74 90 93 97100 90 71 62 73
WIND DIR N S S S S S SW W SW W W SW SW SW W W W W W NW NW
WIND SPD 0 1 2 2 1 1 2 2 3 4 5 4 4 5 5 4 3 3 3 3 2
WIND GUST 14 14 17 17 14
CLOUDS B2 B1 B2 B2 B1 B1 B1 B1 B1 B2 B2 B1 B2 B2 OV OV B2 B2 B2 B2 FW
CLOUDS(%) 76 54 73 74 59 51 58 59 65 75 71 53 81 81 97 97 80 80 73 73 20
VSBY 4 10 10 10 10 9 7 5 7 10 10 10 10 10 4 10 10 10 10 10 10
POP 12HR 70 40 80 100 70
RAIN SHWRS NM NM SC SC SC SC SC NM SC SC NM NM O O NM NM NM NM
TSTMS SC SC SC IS IS IS IS SC SC SC SC SC SC IS IS SC IS
Obvis PF PF
MIX HGT <1 2 3 2 <1 <1 <1 <1 1 3 3 3 1 <1 <1 <1 1 2 3 3 <1
T WIND DIR E SE SW SW S S SW SW SW W W SW SW SW W SW SW W W W NW
T WIND SPD 3 6 6 9 6 6 4 6 10 9 9 12 9 6 6 14 16 21 32 19 13
DISPERSION VP VP VP VP VP PR PR VP VP
ADI 4 20 26 28 3 3 2 3 17 28 29 42 6 5 5 10 23 56130 81 6
MAX LVORI 9 3 3 3 4 8 9 9 5 4 3 1 3 6 6 6 5 4 3 1 3
STABILITY B B B B F F F F B C C C E E E E A B B B G
CEILING 100 1600 None 800 0 900 3900 1000 8600 1100
STA PRES 27.24 27.20 27.19 27.16 27.19 27.17 27.15 27.12 27.14 27.17
Date Thu 07/23/26Fri 07/24/26Sat 07/25/26Sun 07/26/26
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 55 78 56 78 58 78 60 83
TEMP 59 58 74 70 60 60 74 71 62 62 74 71 62 63 78 74
DEWPT 58 58 61 61 58 60 63 63 60 61 64 64 61 63 65 65
RH 96100 64 73 93100 69 76 93 97 71 79 97100 64 74
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC SC B1 SC SC B1 B2 B1 B1 B1 B1 SC SC B1 B1
POP 12HR 10 30 20 40 30 50 20 50
RAIN SHWRS SC IS IS IS SC SC SC SC SC IS IS SC SC
TSTMS SC IS IS SC IS
$$
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