National Weather Service United States Department of Commerce

Print This Forecast (Printer-Friendly)

EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 PM EDT Sun Sep 20 2026

NCZ003-210800-
RAWS 310302
36.35N  80.48W Elev. 1076 ft
801 PM EDT Sun Sep 20 2026

Date           09/20/26      Mon 09/21/26            Tue 09/22/26            Wed
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                 67          85          66          77          60
TEMP                71 69 68 68 80 85 82 74 70 68 68 67 73 77 75 69 66 65 62 61
DEWPT               69 68 67 67 70 69 69 69 68 67 67 66 67 69 68 67 66 65 62 61
MIN/MAX RH                   97          58          97          76         100
RH                  93 97 97 97 72 59 65 84 93 97 97 97 81 76 79 93100100100100
WIND DIR            SW  W  W  N  E  E  N NE  E NE NE NE NE NE NE NE NE NE NE NE
WIND SPD             2  2  2  2  3  3  3  3  4  3  3  4  3  4  4  8 11 12 13 12
CLOUDS              B1 SC SC SC FW B1 B2 OV B2 B2 B2 B2 B2 OV OV OV OV B2 B2 B2
CLOUDS(%)           62 33 36 45 24 60 83 88 80 73 85 74 80 97 97 98 98 84 87 80
VSBY                 7  7  6  3  7  7  3  3  2  1  7  6  9  3  3  3  3  6  6  6
POP 12HR                     30          70          70          80          80
RAIN SHWRS                         SC NM NM NM NM SC IS IS  O  O  O  O NM NM SC
TSTMS                              SC SC SC SC             SC SC IS            
Obvis                     PF PF                                                
MIX HGT             <1 <1 <1 <1  2  4  2 <1 <1 <1 <1 <1  1  3  2 <1            
T WIND DIR          NW  W NW NW  N  E SE  E NE  N  E NE NE NE NE NE            
T WIND SPD           2  2  1  1  1  2  4  9 13  6  6  5  9  9 11 14            
DISPERSION          VP VP VP             VP VP VP VP             PR FR FR FR   
ADI                  1  1  1  1  3 12 12  4  9  3  3  7 18 22 23 13            
MAX LVORI            7  8  9  8  3  2  2  5  6  8  8  6  4  3  3  5            
STABILITY            F  G  G  B  B  B  C  F  E  F  F  D  C  D  D  D            
CEILING              None  None  None  5200  1400  1400   500   500   500      
STA PRES            28.90 28.90 28.93 28.86 28.94 28.97 29.01 29.01            


Date           09/23Thu 09/24/26Fri 09/25/26Sat 09/26/26Sun 09/27/26
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       65      56      65      53      70      51      73      51      75
TEMP          65 63 59 58 63 61 55 54 68 63 54 52 71 64 54 52 73 65
DEWPT         64 62 59 58 62 60 55 52 57 56 50 48 52 53 49 49 53 56
RH            97 97100100 97 97100 93 68 78 86 86 51 67 83 89 49 73
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    B2 B2 B2 B2 B2 B2 B1 B1 SC SC SC SC SC SC SC SC FW FW
POP 12HR           70      70      40       5       5       5       5       5       0
RAIN SHWRS    SC NM NM SC SC 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