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 Tue Sep 22 2026

VAZ024-230800-
RAWS 441631
37.63N  79.51W Elev. 865 ft
401 PM EDT Tue Sep 22 2026

Date           09/22/26      Wed 09/23/26            Thu 09/24/26            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                 55          61          51          64          44
TEMP          67 62 60 59 58 57 58 60 60 56 56 55 54 52 57 62 62 58 51 49 46 45
DEWPT         64 61 58 58 56 55 56 56 55 55 53 53 52 50 51 51 51 51 48 46 44 43
MIN/MAX RH                   96          86          93          66          96
RH            90 97 93 96 93 93 93 87 84 96 90 93 93 93 80 67 67 77 89 89 93 93
WIND DIR      NE NE NE NE  N  N NE NE NE NE NE NE NE  N NE NE NE NE  N  N  N  N
WIND SPD       5  5  4  4  5  6  5  5  5  5  5  4  5  6  6  5  5  4  3  2  3  4
WIND GUST        18 19 20 21 20 16 16 16 18 23 21 21 21 17          13 13 14 17
CLOUDS        OV OV OV OV OV B2 OV OV OV OV OV OV B2 B2 B2 B2 B1 B1 SC FW CL CL
CLOUDS(%)     94 97 91 88 90 82 91 92 91 97 93 89 85 71 87 80 59 51 34 15  1  0
VSBY           3  2  1  1  2  1  2  4  4  5  5  6  6                           
POP 12HR                     90          70          80          30           0
RAIN              L  D  L  D  L  C  C  C  C  L  L  L  C  C                     
RAIN SHWRS    NM                                                               
TSTMS         SC                                                               
MIX HGT        1  1  1  1  1  1  1  2  1  1 <1  1  1  1  2  2  2 <1            
T WIND DIR    NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE            
T WIND SPD    13 12 12 11 12 13 14 14 13 13 14 12 16 16 16 13 14 12            
DISPERSION       PR VP VP PR             PR PR VP PR             VP VP VP VP   
ADI           21  8  8  8  8 18 23 26 22  9 10  8 11 24 30 29 30  8            
MAX LVORI      4  8  8  8  8  5  5  4  4  8  7  8  6  5  4  3  1  4            
STABILITY      D  E  E  E  E  D  D  D  D  E  E  E  E  D  D  D  D  E            
CEILING               400   400   500  1200   500   500   500   500  None      
STA PRES            28.69 28.71 28.77 28.76 28.75 28.71 28.71 28.70            


Date           09/25Sat 09/26/26Sun 09/27/26Mon 09/28/26Tue 09/29/26
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       74      46      76      48      77      49      79      51      80
TEMP          72 61 50 47 74 63 52 50 75 64 54 51 77 66 56 53 79 69
DEWPT         45 45 44 43 47 49 47 46 51 52 50 49 54 57 53 52 59 62
RH            38 56 80 86 38 60 83 86 43 65 86 93 45 73 90 96 50 78
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    FW FW FW FW FW FW SC FW FW SC SC SC SC SC SC SC FW SC
POP 12HR            0       0       0       0       0       0       5       5       5

$$


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