National Weather Service United States Department of Commerce

Print This Forecast (Printer-Friendly)

EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
201 PM EDT Sat Aug 15 2026

VAZ018-160800-
RAWS 444002
37.56N  80.18W Elev. 2702 ft
201 PM EDT Sat Aug 15 2026

Date           08/15/26      Sun 08/16/26            Mon 08/17/26            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                 69          88          71          87          68
TEMP          84 75 73 71 71 71 81 86 86 77 75 73 72 72 83 86 84 75 72 70 68 69
DEWPT         72 72 71 70 69 70 74 73 73 71 70 68 68 68 72 71 71 70 69 68 67 67
MIN/MAX RH                   97          63          88          61          96
RH            67 90 93 97 93 97 79 65 65 82 84 84 87 87 70 61 65 84 90 93 97 93
WIND DIR      NW NE  N SW  W  W  W  W  W  W  W  W  W  W  W  W  W NW  W NW NW NW
WIND SPD       3  2  0  1  1  2  4  5  5  4  5  6  6  6  8  8  6  5  4  3  2  3
WIND GUST                          17 18 16 19 23 23 23 23 21 20 17            
CLOUDS        B2 B1 B1 B1 B1 B1 SC FW FW SC SC B1 B1 SC SC B1 B1 SC B1 SC SC SC
CLOUDS(%)     72 65 57 64 68 52 33 23 16 43 31 55 58 35 41 56 56 48 51 41 35 30
VSBY          10 10  7  4  3  1 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10   
POP 12HR                     50          30          30          30          20
RAIN SHWRS    NM SC SC    IS SC          IS    IS          SC SC IS IS         
TSTMS         SC SC IS    IS             IS                SC SC IS            
Obvis                  PF PF PF                                                
MIX HGT        4 <1 <1 <1 <1 <1  3  5  5 <1 <1 <1 <1  1  3  5  4  1            
T WIND DIR    NW  S SE SE  S  S SW  W SW SW SW  W  W NW NW NW  W  W            
T WIND SPD     4  2  2  4  5  8 10 13 17  8  3  4 11 12 17 14 13 11            
DISPERSION       VP VP VP VP             VP PR PR PR             PR VP VP VP   
ADI           21  1  1  2  3  8 41 85106  5  2  3  8 17 73 60 49  8            
MAX LVORI      3  7  7  8  8  8  3  1  1  5  5  5  5  4  1  1  1  4            
STABILITY      B  F  F  F  F  B  A  A  A  E  F  E  E  B  B  C  C  E            
CEILING        6800  4900   100  None  None  None  None  None  None  None      
STA PRES      27.92 27.92 27.90 27.87 27.75 27.74 27.73 27.75 27.72            


Date           08/18Wed 08/19/26Thu 08/20/26Fri 08/21/26Sat 08/22/26
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       85      63      88      67      84      64      80      63      79
TEMP          85 73 65 66 86 77 69 69 84 72 66 65 79 69 65 64 79 69
DEWPT         67 64 61 61 66 65 63 64 68 65 63 62 66 63 61 61 65 63
RH            55 73 87 84 51 67 81 84 59 79 90 90 64 81 87 90 62 81
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    SC FW FW FW FW FW SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1
POP 12HR            5       0       5      20      30      40      40      50      30
RAIN SHWRS                         IS    SC SC SC SC SC SC IS IS SC
TSTMS                                    SC IS       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