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
231 PM EDT Wed Aug 5 2026

VAZ018-060800-
RAWS 444002
37.56N  80.18W Elev. 2702 ft
231 PM EDT Wed Aug 5 2026

Date           08/05/26      Thu 08/06/26            Fri 08/07/26            Sat
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          85          68          85          66
TEMP          81 74 71 70 69 70 81 85 82 74 71 70 69 70 80 84 81 73 71 69 67 69
DEWPT         72 71 69 68 68 69 71 71 72 70 68 68 67 68 72 71 72 71 68 67 66 68
MIN/MAX RH                   96          63          97          66          97
RH            74 90 93 93 97 97 72 63 72 87 90 93 93 93 77 65 74 93 90 93 97 97
WIND DIR       S  S SW SW  W SW SW  S  W  W SW SW  W  W SW SW SW SW SW SW  W  W
WIND SPD       4  2  1  1  2  2  2  4  3  2  1  1  1  1  2  3  3  2  2  2  2  2
CLOUDS        B1 SC SC SC FW SC FW B1 B2 B1 B1 B1 SC SC SC B2 B2 B1 SC SC SC SC
CLOUDS(%)     64 38 49 29 21 34 23 69 82 64 61 58 32 45 38 82 82 55 43 38 32 31
VSBY          10 10  9  7  4  2 10 10 10 10                                    
POP 12HR                     10          70          40          70          20
RAIN SHWRS    SC                   SC NM SC IS             NM NM IS IS         
TSTMS         SC                   SC SC IS                SC SC IS            
Obvis                     PF PF                                                
MIX HGT        3 <1 <1 <1 <1 <1  4  5  2 <1 <1 <1 <1 <1  3  5  3 <1            
T WIND DIR     S  S  S  S SW SW  W SW  S  S SW SW SW  W  W  W  W SW            
T WIND SPD    10 10  5  5  8  6  6  9 11 16  8  8  4  5  9 10  8  8            
DISPERSION       VP VP VP VP             VP VP VP VP             VP VP VP VP   
ADI           33  5  3  3  4  7 33 37 32  7  4  4  2  6 36 63 26  4            
MAX LVORI      3  6  6  6  6  6  3  1  3  5  6  6  6  7  3  1  3  6            
STABILITY      C  G  F  G  G  A  A  C  B  F  F  F  G  A  A  B  B  F            
CEILING        2100  None  None  None  3000  None  None  None  3000  None      
STA PRES      27.88 27.91 27.94 27.97 27.94 27.96 27.98 28.00 27.95            


Date           08/08Sun 08/09/26Mon 08/10/26Tue 08/11/26Wed 08/12/26
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      67      86      67      88      69      88      69      84
TEMP          84 76 70 70 85 78 70 69 86 78 71 71 86 78 71 71 82 75
DEWPT         71 70 67 68 69 69 65 66 69 69 66 67 70 69 67 68 71 69
RH            65 82 90 93 59 74 84 90 57 74 84 87 59 74 87 90 69 82
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    SC B1 SC SC SC SC SC FW SC SC SC SC SC SC B1 B1 B1 B1
POP 12HR           50      20      10       5      10      20      20      30      50
RAIN SHWRS       SC IS                      IS       IS SC IS IS SC
TSTMS            SC IS                      IS       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