National Weather Service United States Department of Commerce

Print This Forecast (Printer-Friendly)

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

VAZ018-210800-
RAWS 444002
37.56N  80.18W Elev. 2702 ft
401 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                 66          81          64          72          58
TEMP          80 73 70 68 66 66 77 79 76 69 67 67 66 65 69 72 70 65 63 62 60 58
DEWPT         66 65 64 64 63 64 68 69 69 67 65 64 63 63 65 67 66 64 62 60 59 57
MIN/MAX RH                   92          65          93          85          99
RH            62 76 81 87 90 93 74 72 79 93 93 90 90 93 87 84 87 97 97 93 96 96
WIND DIR      NW NW  W  W  N  W SE SE SE  E SE  E SE  E  E  E  E  E NE NE NE  E
WIND SPD       3  2  1  1  0  1  2  3  2  2  3  2  2  2  2  3  3  4  6  6  8  8
WIND GUST                                                        16 19 23 24 24
CLOUDS        B1 B1 B1 SC SC B1 B2 B2 OV OV OV OV OV OV OV OV OV OV OV B2 B2 B2
CLOUDS(%)     69 69 52 38 37 61 73 77 96 88 88 93 94 93 96100100100100 87 80 86
VSBY           7 10 10 10  2  1  6  3  3  6  4  1  2  2  2  3  3  6  6  6  6  6
POP 12HR                      5          90          80          90          90
RAIN SHWRS    IS             SC SC NM  O NM  O NM SC NM NM  O  O  O  O NM NM NM
TSTMS         IS                IS SC SC SC SC             SC SC               
MIX HGT        3 <1 <1 <1 <1 <1  2  2  1 <1 <1 <1 <1 <1  1  2  1 <1            
T WIND DIR     W  S SW  W  W  N  S  W SE  E  E  E NE NE NE NE NE NE            
T WIND SPD     8  6  4  2  2  5  2  5  9 10  5  4  5  6  5  8 10 11            
DISPERSION       VP VP VP VP             VP VP VP VP             VP PR PR PR   
ADI           26  3  2  1  1  4  5 16 12  5  3  2  3  5 11 14 15 10            
MAX LVORI      2  4  5  5  6  6  3  3  4  6  6  6  6  6  5  4  5  7            
STABILITY      C  F  F  G  G  C  C  C  C  F  F  F  F  C  C  D  D  D            
CEILING              None  None   700  1300   300     0   100   100   100      
STA PRES            27.75 27.76 27.79 27.76 27.84 27.84 27.87 27.90            


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       63      54      61      51      68      48      72      49      74
TEMP          63 58 57 55 60 56 54 52 66 58 53 49 69 60 53 50 71 62
DEWPT         62 57 55 53 59 54 51 49 55 51 46 45 51 50 47 47 54 54
RH            97 96 93 93 96 93 90 89 68 77 77 86 53 69 80 89 55 75
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    B2 B2 B2 B2 B2 B2 B1 B1 B1 SC SC SC SC SC SC SC SC SC
POP 12HR           70      80      40      10       5       5       5       5       5
RAIN SHWRS    NM NM  O NM 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