National Weather Service United States Department of Commerce

Extreme Heat Continues; Severe Thunderstorms into Upper Midwest; Strong Bering Sea Storm

Wildfires and poor air quality continue for the Pacific Northwest, Rockies and extended into the Plains. Severe thunderstorms possible for the northern Plains and upper Midwest on Monday along a frontal boundary. Another boundary will focus showers and thunderstorms for the eastern seaboard with localized heavy rainfall possible. For Alaska, a strong Bering Sea storm will bring winds and rainfall. Read More >

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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
301 AM EDT Mon Aug 3 2026

VAZ018-032000-
RAWS 444002
37.56N  80.18W Elev. 2702 ft
301 AM EDT Mon Aug 3 2026

Date             Mon 08/03/26            Tue 08/04/26            Wed 08/05/26
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                 84          66          80          67          83
TEMP          68 68 77 81 81 73 70 68 67 67 74 78 78 72 70 69 68 69 77 81 80 73
DEWPT         67 68 70 70 70 68 66 65 65 65 68 69 70 69 67 66 66 67 71 72 72 71
MAX/MIN RH                   67          95          74          97          72
RH            97100 79 69 69 84 87 90 93 93 82 74 76 90 90 90 93 93 82 74 77 93
WIND DIR       W NW NW NW NW  N  N NE NE NE  E  E  E SE  E  E  E  E SE  S  S  S
WIND SPD       2  3  3  3  3  2  2  2  3  4  3  4  4  3  1  1  1  1  2  4  4  2
WIND GUST                             13 14                                    
CLOUDS        B1 SC B1 B1 B1 SC B1 B1 B1 B1 B2 B1 B1 B2 B2 B2 B2 B2 B1 B2 B2 B1
CLOUDS(%)     51 28 53 62 52 42 54 61 68 68 78 64 63 72 74 77 71 73 58 82 82 55
VSBY           4  2 10 10 10 10 10 10  8  7 10 10  6  7  7  7  7  7            
POP 12HR                     20          20          60          60          70
RAIN SHWRS             IS IS IS IS IS IS       SC SC NM NM IS IS IS IS NM NM   
TSTMS                  IS IS IS                SC SC IS IS          IS SC SC   
MIX HGT       <1 <1  3  4  4 <1 <1 <1 <1 <1  2  3  3  1 <1 <1 <1 <1  2  3  3 <1
T WIND DIR     W NW NW NW  N  N  N  E NE  E  E  E SE SE  E  E NE  E SE SE SE SE
T WIND SPD     3 11  9  6  8  9  9 13 10  9  9  5  8  6  2  2  2  3  6  6 10 12
DISPERSION    VP             VP VP VP VP             VP VP VP VP             VP
ADI            2 13 34 34 35  4  4  6  5  7 27 18 26  3  1  1  1  4 19 23 33  6
MAX LVORI      8  5  3  3  3  5  5  5  6  6  4  3  3  6  7  7  8  8  3  3  3  7
STABILITY      F  A  B  B  B  F  F  F  F  C  B  C  C  F  F  F  F  B  B  C  C  F
CEILING              None  None  3100  2800  3200  3200  3200  1900   900  2400
STA PRES            27.66 27.67 27.75 27.81 27.88 27.87 27.90 27.90 27.94 27.90


Date          Thu 08/06/26Fri 08/07/26Sat 08/08/26Sun 08/09/26
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       68      85      68      86      68      85      68      86
TEMP          70 70 84 76 70 70 84 76 70 70 83 75 70 69 83 76
DEWPT         68 68 71 71 67 68 71 71 67 68 71 71 67 68 71 71
RH            93 93 65 85 90 93 65 85 90 93 67 87 90 97 67 85
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    B1 SC SC B2 B1 SC SC B2 B1 SC SC B2 B1 SC SC B1
POP 12HR           10      70      20      60      30      60      30      40
RAIN SHWRS          IS NM IS       NM SC    IS NM SC    IS SC
TSTMS               IS SC IS       SC IS       SC 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