National Weather Service United States Department of Commerce

Print This Forecast (Printer-Friendly)

EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
431 PM EDT Mon Sep 21 2026

VAZ024-220800-
RAWS 441631
37.63N  79.51W Elev. 865 ft
431 PM EDT Mon Sep 21 2026

Date           09/21/26      Tue 09/22/26            Wed 09/23/26            Thu
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                 63          70          55          61          52
TEMP          76 70 68 67 66 65 68 69 67 63 60 59 57 56 59 60 60 58 57 56 55 53
DEWPT         70 68 66 65 64 64 67 67 64 62 60 59 57 55 58 58 57 58 57 56 54 53
MIN/MAX RH                   98          91          99          91         100
RH            82 93 93 93 93 97 97 93 90 97100100100 96 96 93 90100100100 96100
WIND DIR      SE  E  E  E NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE
WIND SPD       3  3  1  1  1  1  2  3  4  5  5  4  5  6  5  5  5  6  5  4  5  6
WIND GUST                                17 20 20 21 21 17 16 16 20 23 21 23 21
CLOUDS        B2 B2 OV B2 B2 B2 OV OV OV OV OV OV B2 OV OV B2 B2 OV B2 B2 B2 B1
CLOUDS(%)     87 87 96 86 86 86 93 95 88 97 95 92 86 88 88 85 83 88 87 85 73 69
VSBY           9  8  5  2  2  2  3  3  3  4  3  3  3  6  6  6  6 10            
POP 12HR                     90          80          90          80          70
RAIN                                      C  D  D  C  D  D  L  L  L  L  C  C  C
RAIN SHWRS    NM NM  O  O  O  O SC NM  O                                       
TSTMS         SC SC SC IS IS IS IS IS IS                                       
MIX HGT        2 <1 <1 <1 <1 <1  1  1  1  1  1  1  1  1  2  2  2  2            
T WIND DIR     E  E  E  E  E  E  E NE NE NE NE NE NE NE NE NE NE NE            
T WIND SPD     9  8  9  8  3  5  6  8 13 10 10 10 12 12 13 12 12 13            
DISPERSION       VP VP VP VP             PR PR VP PR             PR PR VP PR   
ADI           23  4  4  4  2  6 10 15 21  7  7  7  8 19 23 22 23  9            
MAX LVORI      3  6  7  8  8  9  6  5  4  8  8  8  8  5  5  5  4  8            
STABILITY      C  F  F  F  F  C  C  C  D  E  E  E  E  D  D  D  D  E            
CEILING              1000   600   300   400   800   900  1200   500   500      
STA PRES            28.55 28.58 28.61 28.61 28.68 28.68 28.73 28.74            


Date           09/24Fri 09/25/26Sat 09/26/26Sun 09/27/26Mon 09/28/26
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       64      48      72      46      74      47      76      49      77
TEMP          62 56 51 49 70 62 51 47 72 62 52 49 73 64 54 51 75 65
DEWPT         57 55 51 48 51 49 46 44 49 50 48 46 52 54 51 49 57 60
RH            84 96100 96 51 62 83 89 44 65 86 89 48 70 90 93 54 84
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    B2 B1 B1 SC FW FW FW FW FW FW FW FW FW SC SC SC FW SC
POP 12HR           30       0       0       0       0       0       0       5       0
RAIN           C                                                   

$$


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