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
731 PM EDT Tue Aug 4 2026

VAZ018-050800-
RAWS 444002
37.56N  80.18W Elev. 2702 ft
731 PM EDT Tue Aug 4 2026

Date           08/04/26      Wed 08/05/26            Thu 08/06/26            Fri
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                 68          82          68          85          67
TEMP             72 70 70 69 69 75 80 80 73 71 70 69 70 80 84 81 73 71 69 68 69
DEWPT            70 68 68 68 69 72 72 73 72 69 68 68 69 72 72 73 72 69 67 66 68
MIN/MAX RH                  100          76          97          66          97
RH               93 93 93 97100 90 77 79 97 93 93 97 97 77 67 77 97 93 93 93 97
WIND DIR          E SE SE  E SE  S  S  S  S SW SW SW SW SW  S SW SW SW  W  W  W
WIND SPD          5  5  4  2  2  3  4  5  5  4  4  1  2  3  4  4  2  2  1  1  1
CLOUDS           B2 OV B2 B2 B1 B1 B2 B1 B1 B1 SC SC SC SC B2 B2 B1 SC SC SC SC
CLOUDS(%)        78 89 84 71 62 69 77 58 60 65 45 44 42 35 86 86 51 38 46 47 45
VSBY              9  6  3  2  1  8 10 10 10  8  7 10                           
POP 12HR                     50          30           5          80          20
RAIN SHWRS       SC SC SC SC IS IS                          O  O IS IS       IS
TSTMS            SC SC          IS                         SC SC IS            
Obvis               PF PF PF PF                                                
MIX HGT           1  1 <1 <1 <1  2  3  2 <1 <1 <1 <1 <1  3  5  3 <1            
T WIND DIR       SE  E  E  E SE  S  S  S  S  S  S SW  W  W  S  S  W            
T WIND SPD        8  4  4  2  2  3  8 10 12  4  5  6  5  3  5 10 13            
DISPERSION       PR PR VP VP             PR VP VP VP             VP VP VP VP   
ADI               4  2  2  1  3 10 26 29  6  2  3  3  6 13 23 30  6            
MAX LVORI         6  6  6  8  9  5  3  3  7  6  6  8  6  4  3  3  6            
STABILITY         F  F  F  F  B  B  C  C  F  F  G  F  A  A  C  C  F            
CEILING              1100   100   100  1500  None  None  None  3300  None      
STA PRES            27.87 27.88 27.90 27.89 27.92 27.96 27.98 27.96            


Date           08/07Sat 08/08/26Sun 08/09/26Mon 08/10/26Tue 08/11/26
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       84      66      85      67      85      68      88      69      88
TEMP          83 76 70 69 83 75 70 68 83 77 70 70 86 78 71 71 86 78
DEWPT         71 71 67 67 71 71 67 68 70 69 66 67 69 69 67 68 70 70
RH            67 85 90 93 67 87 90100 65 76 87 90 57 74 87 90 59 76
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    SC B2 B1 SC SC B2 B1 SC B1 SC FW FW SC SC SC SC SC SC
POP 12HR           70      20      70      20      10      10      20      10      20
RAIN SHWRS    IS NM IS       NM IS                   IS          IS
TSTMS         IS SC IS       SC IS                   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