National Weather Service United States Department of Commerce

Print This Forecast (Printer-Friendly)

EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
131 PM EDT Tue Jul 21 2026

VAZ020-212000-
RAWS 441801
37.99N  79.76W Elev. 2160 ft
131 PM EDT Tue Jul 21 2026

Date             Tue 07/21/26            Wed 07/22/26            Thu 07/23/26
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00
EDT 3hrly     05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20

MAX/MIN TEMP                 82          68          83          60          77
TEMP                   80 81 75 73 71 69 70 76 81 81 73 68 66 62 62 68 75 76 70
DEWPT                  71 72 69 69 69 68 69 68 66 64 61 60 59 57 57 57 58 58 56
MAX/MIN RH                   73          98          56          85          54
RH                     74 74 82 87 93 97 97 76 60 56 66 76 78 84 84 68 55 54 61
WIND DIR                W SW  W  W  W  W  W  W  W  W NW NW  N  N NE  E  E SE  E
WIND SPD                4  3  4  5  4  3  3  3  3  2  2  2  3  3  3  2  1  1  1
WIND GUST              14 13 16 18 17                                          
CLOUDS                 B2 B2 OV B2 B1 SC SC SC SC SC SC SC B1 B1 B1 B1 SC SC SC
CLOUDS(%)              83 86 98 73 67 38 47 37 50 48 31 46 62 57 51 58 49 46 32
VSBY                    4  4  3  3  6  7 10 10  7  7 10 10 10 10 10 10 10 10 10
POP 12HR                     70          80          40          10          10
RAIN SHWRS             SC SC  O NM SC SC       IS SC                           
TSTMS                  SC SC NM SC IS          IS IS                           
MIX HGT                 4  3  1 <1 <1 <1  1  4  4  5 <1 <1 <1 <1  1  3  5  4  1
T WIND DIR             SW SW SW SW SW SW  W  W  W  W NW NW NW  N NE NE NW  W SE
T WIND SPD             19 27 18 17 14 10 17 19 13 10  9  4  3  4 12  8  2  1  3
DISPERSION                   VP PR VP VP             VP VP VP VP             VP
ADI                    74 94 12 12 10  5 32 92 76 62  4  2  2  2 22 30 13  6  2
MAX LVORI               3  3  4  6  7  7  6  3  1  1  3  4  4  5  4  3  3  2  3
STABILITY               C  B  E  E  E  G  A  A  A  A  G  F  F  F  B  B  A  A  G
CEILING                    1400  1000  None  None  None  None  None  None  None
STA PRES                  27.67 27.66 27.66 27.74 27.75 27.81 27.86 27.95 27.94


Date          Fri 07/24/26Sat 07/25/26Sun 07/26/26Mon 07/27/26
UTC 6hrly     06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
EDT 6hrly     02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20

MIN/MAX TEMP       58      76      62      77      63      85      65      86
TEMP          61 61 75 68 65 64 73 71 66 66 82 77 68 68 85 75
DEWPT         54 56 60 58 59 62 66 63 63 65 67 66 65 66 67 66
RH            78 84 60 70 81 93 79 76 90 97 61 69 90 93 55 74
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    SC B1 B2 B2 B2 B2 B2 B1 SC SC SC B1 SC SC SC SC
POP 12HR           10      10      40      30      20      30      20      20
RAIN SHWRS                SC SC SC SC IS       SC IS       IS
TSTMS                              IS          SC IS       IS

$$


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