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
801 PM EDT Sun Aug 2 2026

VAZ018-030800-
RAWS 444002
37.56N  80.18W Elev. 2702 ft
801 PM EDT Sun Aug 2 2026

Date           08/02/26      Mon 08/03/26            Tue 08/04/26            Wed
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          84          66          80          67
TEMP                70 69 68 69 75 79 78 72 69 68 67 67 74 79 78 71 69 68 67 68
DEWPT               67 67 65 67 69 68 69 70 67 66 65 66 69 70 70 69 67 66 66 67
MIN/MAX RH                   98          68          99          74          97
RH                  90 93 90 93 82 69 74 93 93 93 93 97 84 74 76 93 93 93 97 97
WIND DIR            SW  W  W NW  W  W NW  N  N NE NE NE  E  E  E SE  E  E  E  E
WIND SPD             4  3  3  3  3  4  4  3  2  2  2  3  3  4  4  2  1  1  1  1
CLOUDS              B2 B2 B2 SC SC SC SC SC B1 B2 B2 OV B2 B2 B1 B2 B1 B2 B2 B2
CLOUDS(%)           81 76 74 49 49 42 43 44 65 76 87 89 79 73 65 75 68 72 74 72
VSBY                 6  3  2  1 10 10 10 10 10  9  6  7  7  6  6  7  7  7  7  7
POP 12HR                     40          50          50          50          30
RAIN SHWRS          SC          IS SC SC       SC SC SC SC SC SC SC SC IS IS IS
TSTMS                              SC SC                   SC SC               
MIX HGT             <1 <1 <1 <1  3  4  3 <1 <1 <1 <1 <1  2  3  3  1            
T WIND DIR           S  S SW NW NW NW NW NW  N NE NE NE NE  E  E  E            
T WIND SPD           8  5  5  5  9  6  8 11  6  6 12 11  8  9  8  9            
DISPERSION          VP VP VP             VP VP VP VP             VP VP VP VP   
ADI                  4  3  3  6 32 35 31  5  3  3  6 12 22 27 25  4            
MAX LVORI            8  8  8  8  3  3  3  6  6  6  7  5  4  3  3  6            
STABILITY            F  F  F  B  B  A  B  F  F  F  F  B  B  C  C  F            
CEILING              1300   500  None  None  2200  2000  2300  2300  1500      
STA PRES            27.59 27.60 27.65 27.66 27.74 27.78 27.84 27.81            


Date           08/05Thu 08/06/26Fri 08/07/26Sat 08/08/26Sun 08/09/26
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       81      67      84      68      85      68      84      68      83
TEMP          80 75 70 69 82 75 70 70 83 75 69 70 83 75 69 69 82 74
DEWPT         72 71 68 68 72 72 68 68 72 71 67 68 72 71 67 68 71 71
RH            77 87 93 97 72 90 93 93 70 87 93 93 70 87 93 97 69 90
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    B1 B2 B1 B1 B1 B2 SC SC SC B2 B1 SC SC B2 SC SC B1 B1
POP 12HR           70      20      70      20      60      20      60      30      50
RAIN SHWRS    IS NM IS    IS NM IS       NM IS    IS NM SC    IS SC
TSTMS         IS SC IS    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