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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 PM EDT Thu Aug 13 2026
NCZ006-140800-
RAWS 310801
36.37N 79.29W Elev. 580 ft
231 PM EDT Thu Aug 13 2026
Date 08/13/26 Fri 08/14/26 Sat 08/15/26 Sun
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 73 93 73 92 72
TEMP 91 83 77 76 74 75 86 91 91 84 78 76 74 75 85 91 89 82 76 75 73 74
DEWPT 72 71 71 71 71 72 73 73 73 74 74 73 73 73 75 75 75 75 73 73 73 74
MIN/MAX RH 95 53 98 59 100
RH 54 67 82 85 90 90 65 56 56 72 88 90 97 94 72 60 64 79 90 94100100
WIND DIR W SW SW SW SW N NW NW W SW N N N N N N NE E N N N N
WIND SPD 6 1 1 1 1 0 2 3 3 1 0 0 0 0 3 3 3 1 0 0 0 0
CLOUDS FW SC B1 SC SC SC B1 SC B1 SC SC B1 B2 SC B1 B1 B1 B1 B1 B1 B2 B1
CLOUDS(%) 10 46 67 44 46 46 55 48 56 49 46 56 84 47 66 54 54 55 55 57 70 57
VSBY 10 10 10 10 9 9 10 10 10 10 10 5 10 10 10 10 10 10 10 10 10
POP 12HR 10 30 20 30 30
RAIN SHWRS IS IS SC SC SC SC
TSTMS IS IS IS SC SC IS
MIX HGT 5 <1 <1 <1 <1 <1 3 5 5 <1 <1 <1 <1 <1 3 5 5 <1
T WIND DIR W SW SW SW W W W W W SW W N NE NE NE N NE NE
T WIND SPD 12 10 3 3 3 2 8 3 5 4 1 2 9 9 6 5 6 8
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 74 5 2 2 2 2 28 23 36 2 1 1 4 10 27 34 39 4
MAX LVORI 1 3 5 5 7 6 3 2 1 3 6 7 7 6 3 1 3 4
STABILITY B F F F F A B A B F F F F A B B B F
CEILING None None None None None None 9100 None None None
STA PRES 29.30 29.35 29.37 29.42 29.40 29.41 29.45 29.52 29.49
Date 08/16Mon 08/17/26Tue 08/18/26Wed 08/19/26Thu 08/20/26
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 94 75 97 72 92 70 92 71 95
TEMP 92 86 79 77 95 86 75 74 90 84 73 72 89 84 75 73 92 85
DEWPT 75 73 72 72 71 72 71 71 71 70 71 71 71 70 70 70 69 69
RH 58 65 79 85 46 63 87 90 54 63 93 97 56 63 84 90 47 59
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 SC SC FW FW B1 SC FW FW B1 B1 SC SC SC SC FW FW SC
POP 12HR 10 20 30 20 30 40 20 20 20
RAIN SHWRS IS SC IS SC SC IS IS IS
TSTMS IS SC IS SC 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
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