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

NCZ006-060800-
RAWS 310801
36.37N  79.29W Elev. 580 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                 69          88          70          88          69
TEMP          83 78 74 73 71 72 81 86 86 80 75 74 73 73 82 87 88 82 76 73 71 73
DEWPT         75 75 72 72 71 72 76 75 74 74 72 72 72 73 76 75 74 74 72 72 71 72
MIN/MAX RH                  100          67         100          63         100
RH            77 91 93 97100100 85 70 68 82 90 93 97100 82 68 63 77 87 97100 97
WIND DIR       S  S  S  S  S SW SW SW  S  S  S  S SW SW SW SW SW SW  S  S SW SW
WIND SPD       5  2  1  1  2  3  5  6  5  3  1  1  2  3  5  6  6  2  1  2  2  3
CLOUDS        B1 B1 SC FW SC B1 SC SC B1 SC SC SC B1 SC SC SC B1 B1 B1 FW SC SC
CLOUDS(%)     67 69 28 19 33 53 36 38 52 48 35 36 65 47 42 40 55 59 51 21 26 28
VSBY          10 10 10  9  7  8 10 10 10 10                                    
POP 12HR                     20          20          20          20          30
RAIN SHWRS    SC IS                IS IS    IS             IS IS SC SC         
TSTMS         SC IS                IS IS                   IS IS SC IS         
MIX HGT        3 <1 <1 <1 <1  1  3  4  3 <1 <1 <1 <1  1  3  5  4 <1            
T WIND DIR     S  S  S  S  S SW SW SW  S  S  S SW SW SW SW SW SW SW            
T WIND SPD    18 12  6 11  9 10 11 12 16  8  9  5  5  9 14 17 17  8            
DISPERSION       VP VP VP VP             VP VP VP VP             VP VP VP VP   
ADI           58  6  3  5  4 14 41 66 49  4  4  3  3 12 60100 83  4            
MAX LVORI      3  5  6  7  9  5  4  1  1  5  6  6  9  5  3  1  1  4            
STABILITY      C  F  G  G  G  B  A  B  C  F  G  G  F  A  A  B  B  F            
CEILING        3000  None  None  None  None  None  None  None  None  None      
STA PRES      29.46 29.50 29.52 29.55 29.51 29.55 29.57 29.58 29.51            


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       88      70      90      69      92      71      93      71      91
TEMP          87 83 74 71 88 83 74 72 90 85 75 73 91 85 76 72 89 82
DEWPT         74 74 72 71 73 73 71 72 72 73 71 72 73 73 71 72 73 73
RH            65 74 93100 61 72 90100 56 67 87 97 56 67 85100 59 74
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    SC SC SC SC SC SC SC FW FW SC SC SC FW SC SC SC SC B1
POP 12HR           20      10      20      10       5      10      20      20      40
RAIN SHWRS       IS          IS                      IS IS       SC
TSTMS            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