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
801 AM EDT Wed Aug 5 2026

NCZ003-052000-
RAWS 310301
36.48N  80.86W Elev. 1300 ft
801 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                 80          67          84          66          83
TEMP                74 77 77 73 70 69 69 70 76 81 80 75 71 69 67 70 78 82 79 75
DEWPT               71 71 71 72 70 69 68 69 71 71 71 71 71 69 67 70 74 74 75 74
MAX/MIN RH                   78         100          69         100          78
RH                  90 82 82 97100100 97 97 85 72 74 87100100100100 88 77 88 97
WIND DIR            SE  S  S SE  N  N  N  N  S  S  S  S  N  N  N  N  S  S SW  N
WIND SPD             2  4  4  1  0  0  0  0  3  5  4  1  0  0  0  0  2  4  3  0
CLOUDS              B2 B1 B1 B1 SC SC B1 B1 SC B2 B2 B1 B1 SC SC B1 B1 OV OV B1
CLOUDS(%)           82 67 67 62 42 34 59 63 50 78 73 61 66 45 49 57 56 88 88 54
VSBY                10 10 10 10 10  8  6  6 10 10 10 10                        
POP 12HR                     60          30          70          30          80
RAIN SHWRS             SC SC SC IS             NM NM SC SC       SC SC  O  O   
TSTMS                  SC SC IS                SC SC SC             IS SC SC   
Obvis                                 PF PF                                    
MIX HGT              2  3  3 <1 <1 <1 <1 <1  2  4  3 <1 <1 <1 <1 <1  2  3  3 <1
T WIND DIR           S  S  S  S  S  S SW SW SW  S  S  S SW SW SW  W  W  S  S  S
T WIND SPD           3  9 12 11  8  4  3  3  9 12 12 10  4  4  3  4  4  8 16 11
DISPERSION                   VP VP VP VP             VP VP VP VP             VP
ADI                  8 29 37  5  4  2  2  4 27 47 38  5  2  2  2  5 12 24 53  5
MAX LVORI            8  4  4  9  9  9 10  9  4  3  4  7  9  9 10  9  5  3  4  7
STABILITY            B  C  C  F  F  G  F  B  A  C  C  F  F  F  F  B  B  C  B  F
CEILING               600  2200  None  1100  None  2300  4200  None  6100  3500
STA PRES            28.24 28.22 28.26 28.29 28.32 28.32 28.33 28.33 28.35 28.29


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       66      85      66      86      66      87      68      88
TEMP          69 70 83 78 69 69 83 79 70 70 84 80 71 71 85 80
DEWPT         69 70 74 74 69 69 73 74 69 69 73 74 70 70 73 74
RH           100100 74 88100100 72 85 97 97 70 82 97 97 67 82
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    SC SC SC B2 SC SC SC B1 SC FW SC SC SC FW SC SC
POP 12HR           10      80      20      30       5      20      10      20
RAIN SHWRS              O IS IS    SC          IS          IS
TSTMS                  SC 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