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 AM EDT Sun Aug 16 2026

VAZ018-170800-
RAWS 444002
37.56N  80.18W Elev. 2702 ft
201 AM EDT Sun Aug 16 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                 70          86          70          87          67
TEMP                      70 71 80 85 85 77 75 73 72 72 81 86 84 75 72 69 68 69
DEWPT                     69 69 71 70 68 71 69 68 68 68 71 71 71 69 68 67 66 66
MIN/MAX RH                  100          56          89          60          94
RH                        97 93 74 61 57 82 82 84 87 87 72 61 65 82 87 93 93 90
WIND DIR                  SW  W  W  W  W  W  W  W  W  W  W  W  W NW NW NW NW NW
WIND SPD                   3  2  3  5  5  4  5  6  8  8  8  6  6  5  3  2  2  3
WIND GUST                       13 16 17 14 20 25 27 26 23 20 20 18 13         
CLOUDS                    OV B2 SC B1 B1 B1 B1 OV B1 B1 B1 SC SC B1 SC SC SC SC
CLOUDS(%)                 90 83 47 62 54 62 63 94 58 52 56 42 46 59 47 46 31 31
VSBY                       7  7 10 10 10 10  9  9  9  6 10 10 10 10 10 10 10  1
POP 12HR                     60          40          60          40          10
RAIN SHWRS                SC IS IS SC SC SC SC NM          IS                  
TSTMS                     IS IS IS IS IS SC IS             IS                  
Obvis                     PF PF                                                
MIX HGT                   <1 <1  3  4  4 <1 <1 <1 <1  1  3  5  4  1 <1 <1 <1 <1
T WIND DIR                 S  S  W  W SW NW  S  W  W  W NW NW NW NW NW NW NW NW
T WIND SPD                 2  3 13 13 14  5  2  5  8 11 14 13 14 11  3  3  3  4
DISPERSION                VP             VP PR PR PR             PR VP VP VP   
ADI                        1  4 47 54 58  4  2  4  7 18 52 73 72  8  2  2  2  4
MAX LVORI                  8  6  3  1  1  5  5  5  5  4  3  1  1  4  6  7  7  6
STABILITY                  F  B  A  C  C  E  E  E  D  C  B  B  B  E  F  F  G  A
CEILING                     100  None  None  4200  2300  None  None  None  None
STA PRES                  27.90 27.88 27.78 27.75 27.73 27.74 27.70 27.71 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      85      65      81      64      80
TEMP          85 73 65 66 86 78 69 69 84 72 67 65 80 70 66 66 80 70
DEWPT         66 63 59 61 65 64 63 64 69 66 63 63 68 65 63 63 67 64
RH            53 71 81 84 50 62 81 84 61 81 87 93 67 84 90 90 65 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 B2 B1 B1 B1 B1
POP 12HR            0       0       5      20      30      40      60      50      40
RAIN SHWRS                      IS IS IS SC SC SC SC NM 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