National Weather Service United States Department of Commerce

Showers and Storms continue across the East; Heat, Critical Fire Weather, Drought, and Poor Air Quality continues in the West

A series of fronts will focus locally heavy showers and storms across portions of the central and eastern U.S. through the end of the workweek. Dangerous to extreme heat continues across the Southwest U.S., eventually spreading eastward over the weekend into early next week. Elevated fire weather conditions continue across the Great Basin, with degraded air quality lingering across the Northwest. Read More >

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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
301 AM EDT Wed Aug 5 2026

VAZ018-052000-
RAWS 444002
37.56N  80.18W Elev. 2702 ft
301 AM EDT Wed Aug 5 2026

Date             Wed 08/05/26            Thu 08/06/26            Fri 08/07/26
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                 81          68          86          67          86
TEMP          68 69 74 79 78 72 70 69 69 70 80 85 82 73 71 70 68 70 80 84 80 73
DEWPT         68 68 69 70 70 69 67 67 66 68 69 67 69 69 69 68 67 68 72 72 72 71
MAX/MIN RH                   70          96          55          99          66
RH           100 97 84 74 76 90 90 93 90 93 69 55 65 87 93 93 97 93 77 67 77 93
WIND DIR       E SE SE  S  S  S SW  W  W  W SW  S SW SW SW SW  W  W SW SW SW SW
WIND SPD       1  1  2  4  4  2  1  1  1  2  3  4  4  2  1  1  1  1  2  3  3  2
CLOUDS        B2 B2 B2 B2 B1 B1 B1 SC FW FW SC B1 B2 SC B1 SC SC SC SC B2 B2 SC
CLOUDS(%)     72 71 72 75 65 63 58 49 20 13 31 68 70 50 51 48 39 48 43 83 83 50
VSBY           2  1  8 10 10 10  7  6  8  7 10 10                              
POP 12HR                     50          10          70          30          70
RAIN SHWRS    IS       SC SC                   SC NM SC SC             NM NM IS
TSTMS                  SC SC                   SC SC SC                SC SC IS
Obvis         PF                      PF PF                                    
MIX HGT       <1 <1  2  3  3 <1 <1 <1 <1 <1  3  5  3 <1 <1 <1 <1 <1  2  4  2 <1
T WIND DIR    SW  W SW  S  S  S  S  S SW SW SW  S  S SW SW SW SW  W  W  W  S SW
T WIND SPD     2  3  3  6 12 12  9  8  4  6  6  8 16 11  6  5  4  6 11  5  4  4
DISPERSION    VP             VP VP VP VP             VP VP VP VP             VP
ADI            1  4  8 22 42  6  4  4  2  7 29 32 48  5  3  3  2  7 31 29 13  2
MAX LVORI     10  9  6  3  3  9  9  8  8  6  3  1  3  6  6  8  9  6  3  3  4  6
STABILITY      F  B  B  C  C  F  F  F  G  A  A  C  C  F  F  F  G  A  A  B  B  F
CEILING               500  2900  None  None  None  3300  None  None  None  4200
STA PRES            27.90 27.87 27.93 27.95 27.97 27.95 27.98 27.99 28.02 27.98


Date          Sat 08/08/26Sun 08/09/26Mon 08/10/26Tue 08/11/26
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       67      85      67      86      68      89      69      88
TEMP          69 69 84 75 70 70 85 77 70 70 86 78 71 71 86 77
DEWPT         67 68 72 71 67 68 70 70 66 67 70 70 67 68 71 70
RH            93 97 67 87 90 93 61 79 87 90 59 76 87 90 61 79
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    SC SC SC B2 B1 SC SC SC SC FW FW SC SC SC SC SC
POP 12HR           20      70      20      10       5      20      10      30
RAIN SHWRS    IS       NM IS                   IS          SC
TSTMS         IS       SC IS                   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