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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 PM EDT Tue Aug 18 2026
NCZ005-190800-
RAWS 310540
36.38N 79.70W Elev. 858 ft
231 PM EDT Tue Aug 18 2026
Date 08/18/26 Wed 08/19/26 Thu 08/20/26 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 69 91 70 93 69
TEMP 91 82 75 73 70 71 82 89 90 83 76 73 71 73 87 92 89 82 75 72 69 71
DEWPT 67 68 69 68 67 67 69 66 64 64 66 67 67 68 69 68 68 69 70 70 69 70
MIN/MAX RH 90 43 88 45 100
RH 45 63 82 84 90 87 65 47 42 53 71 81 87 84 55 46 50 65 84 93100 97
WIND DIR N N N N N N N NW NW N S SW W SW SW W W NW NE N N N
WIND SPD 4 2 3 2 2 3 3 3 2 1 1 1 1 1 3 5 5 2 2 2 3 3
CLOUDS FW FW FW FW FW FW FW FW FW FW CL CL FW FW FW SC B1 B2 B2 B1 B1 B1
CLOUDS(%) 18 25 14 10 19 16 11 18 14 12 4 4 12 13 15 31 51 71 71 58 58 62
VSBY 10 10 10 10 9 10 10 10 10 10 10 10 10 10 10 6 6 6 6 7 7
POP 12HR 5 0 0 20 60
RAIN SHWRS IS IS NM NM SC SC SC
TSTMS IS IS SC IS
MIX HGT 6 <1 <1 <1 <1 <1 3 6 6 <1 <1 <1 <1 <1 4 7 5 <1
T WIND DIR N NW N NW N N N NW NW W S S SW S W SW SW S
T WIND SPD 4 2 1 2 5 8 3 6 4 2 2 2 2 2 12 10 18 9
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 36 1 1 1 3 8 15 48 36 1 1 1 1 2 64 87112 4
MAX LVORI 1 3 6 6 6 5 2 1 1 2 3 4 5 5 1 1 1 3
STABILITY A G G G G A A A A G G G G A A A B F
CEILING None None None None None None None None None 5900
STA PRES 29.13 29.19 29.19 29.23 29.21 29.20 29.21 29.22 29.13
Date 08/21Sat 08/22/26Sun 08/23/26Mon 08/24/26Tue 08/25/26
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 84 66 86 63 86 65 87
TEMP 85 79 70 68 82 77 69 68 84 78 66 66 84 79 67 67 85 80
DEWPT 72 72 70 68 72 71 68 68 67 65 61 61 63 63 63 63 66 66
RH 65 79100100 72 82 97100 57 64 84 84 49 58 87 87 53 62
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B2 B2 B2 B1 B1 B1 SC SC FW FW FW FW FW SC SC SC SC
POP 12HR 70 80 50 30 10 5 5 10 10
RAIN SHWRS SC NM O SC SC SC SC
TSTMS IS SC SC SC 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