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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
131 PM EDT Tue Jul 21 2026
VAZ020-212000-
RAWS 441801
37.99N 79.76W Elev. 2160 ft
131 PM 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 82 68 83 60 77
TEMP 80 81 75 73 71 69 70 76 81 81 73 68 66 62 62 68 75 76 70
DEWPT 71 72 69 69 69 68 69 68 66 64 61 60 59 57 57 57 58 58 56
MAX/MIN RH 73 98 56 85 54
RH 74 74 82 87 93 97 97 76 60 56 66 76 78 84 84 68 55 54 61
WIND DIR W SW W W W W W W W W NW NW N N NE E E SE E
WIND SPD 4 3 4 5 4 3 3 3 3 2 2 2 3 3 3 2 1 1 1
WIND GUST 14 13 16 18 17
CLOUDS B2 B2 OV B2 B1 SC SC SC SC SC SC SC B1 B1 B1 B1 SC SC SC
CLOUDS(%) 83 86 98 73 67 38 47 37 50 48 31 46 62 57 51 58 49 46 32
VSBY 4 4 3 3 6 7 10 10 7 7 10 10 10 10 10 10 10 10 10
POP 12HR 70 80 40 10 10
RAIN SHWRS SC SC O NM SC SC IS SC
TSTMS SC SC NM SC IS IS IS
MIX HGT 4 3 1 <1 <1 <1 1 4 4 5 <1 <1 <1 <1 1 3 5 4 1
T WIND DIR SW SW SW SW SW SW W W W W NW NW NW N NE NE NW W SE
T WIND SPD 19 27 18 17 14 10 17 19 13 10 9 4 3 4 12 8 2 1 3
DISPERSION VP PR VP VP VP VP VP VP VP
ADI 74 94 12 12 10 5 32 92 76 62 4 2 2 2 22 30 13 6 2
MAX LVORI 3 3 4 6 7 7 6 3 1 1 3 4 4 5 4 3 3 2 3
STABILITY C B E E E G A A A A G F F F B B A A G
CEILING 1400 1000 None None None None None None None
STA PRES 27.67 27.66 27.66 27.74 27.75 27.81 27.86 27.95 27.94
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 58 76 62 77 63 85 65 86
TEMP 61 61 75 68 65 64 73 71 66 66 82 77 68 68 85 75
DEWPT 54 56 60 58 59 62 66 63 63 65 67 66 65 66 67 66
RH 78 84 60 70 81 93 79 76 90 97 61 69 90 93 55 74
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC B1 B2 B2 B2 B2 B2 B1 SC SC SC B1 SC SC SC SC
POP 12HR 10 10 40 30 20 30 20 20
RAIN SHWRS SC SC SC SC IS SC IS IS
TSTMS IS SC IS 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