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 Sat Sep 12 2026

VAZ024-130800-
RAWS 441631
37.63N  79.51W Elev. 865 ft
801 PM EDT Sat Sep 12 2026

Date           09/12/26      Sun 09/13/26            Mon 09/14/26            Tue
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          90          65          86          55
TEMP                71 70 70 68 79 88 88 76 70 67 66 66 78 84 85 75 65 60 56 56
DEWPT               71 70 68 68 73 72 71 70 68 67 65 66 66 62 59 58 55 52 50 51
MIN/MAX RH                  100          57         100          41          86
RH                 100100 93100 82 59 57 82 93100 97100 67 48 41 55 70 75 80 83
WIND DIR             N  N  N  W NW NW NW NW NW  W  W NW  N  N  N NE NE NE  N  N
WIND SPD             0  0  0  1  3  3  2  2  1  1  1  1  3  4  4  2  2  1  0  0
CLOUDS              OV B2 B2 B1 SC SC FW FW FW SC CL FW SC FW FW FW FW SC SC FW
CLOUDS(%)           93 83 84 57 35 31 14 10 19 27  3  6 34 22 12 17 23 31 30 23
VSBY                 5  3  3  3 10 10 10 10 10 10 10 10 10 10 10 10            
POP 12HR                     50          10           5          10           0
RAIN SHWRS          SC SC                                                      
TSTMS                                                                          
Obvis               PF PF PF PF                                                
MIX HGT             <1 <1 <1 <1  3  5  3 <1 <1 <1 <1 <1  4  5  5 <1            
T WIND DIR          SE SW SW  W NW NW  W NW NW  W  W  N  N  N  N  N            
T WIND SPD           6 10  3  2  8  9  9 11  4  3  2  4 14 14 12  4            
DISPERSION          VP VP VP             VP VP VP VP             VP VP VP VP   
ADI                  3  5  2  2 29 49 39  5  2  2  1  4 73 92 78  2            
MAX LVORI            9  9 10  9  3  1  1  4  6 10 10  9  1  1  1  3            
STABILITY            F  F  F  A  B  B  B  G  G  G  G  A  B  B  B  G            
CEILING              1100   200  None  None  None  None  None  None  None      
STA PRES            28.46 28.46 28.50 28.45 28.48 28.50 28.58 28.62            


Date           09/15Wed 09/16/26Thu 09/17/26Fri 09/18/26Sat 09/19/26
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       82      56      85      59      89      62      90      63      85
TEMP          78 69 59 57 83 74 62 61 87 76 65 64 88 78 67 64 83 75
DEWPT         56 60 56 55 64 65 61 59 65 65 62 61 68 67 65 63 66 65
RH            47 73 90 93 53 74 97 93 48 69 90 90 52 69 93 97 57 71
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    SC FW FW FW CL FW FW FW CL FW FW FW FW B1 B1 SC SC B1
POP 12HR            0       0       5       0      10       5      40      20      30
RAIN SHWRS                                           SC IS       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