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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
731 PM EDT Wed Aug 19 2026
NCZ006-200800-
RAWS 310801
36.37N 79.29W Elev. 580 ft
731 PM EDT Wed Aug 19 2026
Date 08/19/26 Thu 08/20/26 Fri 08/21/26 Sat
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 71 94 69 87 67
TEMP 83 77 75 72 74 86 92 91 82 74 72 69 71 80 86 83 76 71 70 68 69
DEWPT 65 66 67 69 69 71 70 71 71 71 71 69 71 73 74 74 73 71 70 68 69
MIN/MAX RH 93 47 100 68 100
RH 55 69 76 90 84 61 49 52 69 90 97100100 79 68 74 90100100100100
WIND DIR S S S S N SW SW W W E N N NE NE NE E N N N N N
WIND SPD 2 2 2 2 0 4 5 5 2 1 0 1 1 3 3 3 1 0 0 0 0
CLOUDS CL CL FW FW SC FW SC B1 B1 B1 B2 B1 B1 B1 B2 B2 OV OV B2 B2 B1
CLOUDS(%) 4 1 7 10 28 21 38 55 66 56 73 55 63 67 84 84 89 89 80 76 64
VSBY 10 10 10 10 10 10 10 10 10 8 7 7 7 9 10 10 10
POP 12HR 0 30 50 80 80
RAIN SHWRS IS SC SC SC IS IS SC SC O O O O SC SC IS
TSTMS IS SC SC IS IS IS IS SC SC SC IS
MIX HGT <1 <1 <1 <1 <1 4 7 6 <1 <1 <1 <1 <1 2 3 2 <1
T WIND DIR W SW SW W S SW SW SW W NW NE NE N N N S NE
T WIND SPD 2 2 2 2 1 14 14 18 8 4 13 10 8 6 0 4 3
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 1 1 1 1 1 68124 84 4 2 6 5 9 22 0 13 2
MAX LVORI 3 3 4 5 5 1 1 1 3 6 8 9 8 3 4 3 7
STABILITY G G G G A A A C F F F F B B B B F
CEILING None None None None 10900 8900 9900 5000 2000
STA PRES 29.31 29.33 29.34 29.28 29.32 29.41 29.43 29.36
Date 08/22Sun 08/23/26Mon 08/24/26Tue 08/25/26Wed 08/26/26
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 86 66 88 64 87 65 87 66 88
TEMP 83 79 70 69 86 80 69 67 85 79 68 67 85 80 69 69 86 80
DEWPT 74 72 69 68 68 66 63 63 65 64 63 63 68 68 67 68 71 70
RH 74 79 97 97 55 62 81 87 51 60 84 87 57 67 93 97 61 72
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B1 SC SC FW FW FW FW FW FW SC SC SC SC B1 SC B1 B1
POP 12HR 40 20 5 20 20 20 20 30 40
RAIN SHWRS IS SC IS IS IS IS IS SC IS IS SC
TSTMS SC IS IS IS IS 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
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