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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
731 AM EDT Thu Aug 13 2026
VAZ046-132000-
RAWS 441101
37.39N 78.80W Elev. 804 ft
731 AM EDT Thu Aug 13 2026
Date Thu 08/13/26 Fri 08/14/26 Sat 08/15/26
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 94 72 91 71 88
TEMP 73 85 92 91 83 77 75 73 73 83 88 87 80 75 73 71 72 80 86 87 81
DEWPT 67 71 71 71 72 71 70 69 70 72 73 73 73 72 71 70 70 72 72 71 70
MAX/MIN RH 50 88 60 97 59
RH 81 63 51 52 70 82 84 87 90 70 61 63 79 90 93 97 93 77 63 59 69
WIND DIR W W W W NW N N NE NE N N NE NE NE N N N NE NE E E
WIND SPD 4 4 5 5 3 2 3 3 3 4 4 5 3 3 3 3 4 5 5 4 2
CLOUDS FW SC FW SC SC SC B1 B1 SC B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 SC
CLOUDS(%) 17 44 23 40 28 39 54 69 47 86 81 73 76 65 65 67 69 60 57 52 42
VSBY 10 10 10 10 10 10 8 8 10 10 10 10 10 6 10 10 10 10 10 10 10
POP 12HR 20 10 40 40 20
RAIN SHWRS IS SC SC SC SC IS IS
TSTMS IS IS IS IS IS
MIX HGT <1 3 6 7 <1 <1 <1 <1 <1 3 5 3 <1 <1 <1 <1 1 3 4 5 <1
T WIND DIR W W W W W SW NW N SE W NE E SE N N N NE NE NE NE E
T WIND SPD 3 11 10 13 6 1 2 1 1 3 4 6 3 17 4 11 10 9 9 6 8
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 3 47 76110 3 1 1 1 1 11 18 23 2 8 2 5 16 29 36 30 4
MAX LVORI 5 1 1 1 3 6 5 6 6 3 2 2 4 5 8 7 5 3 1 2 3
STABILITY A A A A G G F F A C C C F F F F C C C C F
CEILING None None None None 6400 5300 4300 2400 1200 None
STA PRES 29.24 29.22 29.25 29.28 29.32 29.28 29.31 29.37 29.47 29.45
Date Sun 08/16/26Mon 08/17/26Tue 08/18/26Wed 08/19/26
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 70 92 74 95 71 89 69 89
TEMP 72 72 90 85 76 75 92 84 74 72 86 81 71 70 87 82
DEWPT 70 70 74 74 72 72 74 73 71 69 71 70 69 68 71 70
RH 93 93 60 70 87 90 56 70 90 90 61 69 93 93 59 67
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B1 SC SC FW SC FW B1 B1 B1 B1 SC B1 SC SC SC
POP 12HR 10 20 10 30 30 20 30 10
RAIN SHWRS IS SC SC IS SC 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