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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