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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
331 PM EDT Tue Jul 21 2026
VAZ012-220800-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
331 PM EDT Tue Jul 21 2026
Date 07/21/26 Wed 07/22/26 Thu 07/23/26 Fri
UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12
EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08
MIN/MAX TEMP 64 80 56 75 55
TEMP 79 75 73 66 65 66 72 76 77 70 64 61 59 59 67 71 73 68 61 58 56 58
DEWPT 69 68 67 66 65 66 69 67 67 65 63 60 58 59 62 63 63 61 59 58 56 58
MIN/MAX RH 100 69 100 70 100
RH 72 79 81100100100 90 74 71 84 97 97 96100 84 76 71 78 93100100100
WIND DIR SW W W W W W W W W NW N N N N E E E E E E E E
WIND SPD 4 4 4 5 3 3 3 3 2 2 1 1 1 1 2 2 2 2 2 1 1 2
WIND GUST 14 14 16 17
CLOUDS B1 B2 B2 OV OV B2 B1 B1 B2 B1 SC SC B2 B1 B1 B1 B1 SC B1 B1 B2 B2
CLOUDS(%) 64 78 80 90 96 84 66 65 72 55 48 47 80 53 63 69 69 45 54 67 76 79
VSBY 6 6 6 3 4 3 4 6 6 7 7 10 10 10 10 6 6 7 7 7 7
POP 12HR 80 60 30 40 20
RAIN SHWRS SC NM NM O SC NM SC SC SC SC IS SC SC IS IS IS IS IS
TSTMS SC NM SC SC IS IS IS SC SC
MIX HGT 3 1 <1 <1 <1 1 2 3 2 <1 <1 <1 <1 <1 2 4 3 1
T WIND DIR SW SW SW SW W W W W SW SW NW N N N E S SE SE
T WIND SPD 18 6 6 8 5 13 11 10 11 2 4 9 8 5 8 4 2 10
DISPERSION VP VP PR VP VP VP VP VP VP VP VP VP
ADI 60 5 5 5 3 23 31 42 27 1 2 4 4 6 23 20 9 5
MAX LVORI 3 4 5 9 9 5 4 3 3 5 8 7 8 8 4 3 3 4
STABILITY C E E E F B B B B F F F F B B B B F
CEILING 1100 700 1300 2400 None 1600 600 1400 None
STA PRES 27.14 27.12 27.18 27.19 27.20 27.25 27.33 27.32
Date 07/24Sat 07/25/26Sun 07/26/26Mon 07/27/26Tue 07/28/26
UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20
MAX/MIN TEMP 74 58 74 60 83 63 85 63 84
TEMP 70 68 63 62 69 68 62 63 77 75 66 66 79 76 66 66 79 75
DEWPT 63 63 61 62 67 65 62 63 67 67 63 65 67 66 63 64 65 64
RH 78 84 93100 93 90100100 71 76 90 97 67 71 90 93 62 69
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B2 B2 B2 B2 B1 B1 SC B1 SC SC B1 B1 B1 B1 B1 B1
POP 12HR 40 60 70 30 30 20 40 40 40
RAIN SHWRS IS SC NM NM NM NM SC SC IS SC IS IS SC SC SC SC SC
TSTMS IS IS IS SC IS IS SC IS 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