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

VAZ012-032000-
RAWS 447502
37.01N  81.18W Elev. 2540 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                 80          61          79          63          82
TEMP          64 64 72 76 79 72 65 63 62 64 71 75 78 72 66 65 64 65 73 77 80 74
DEWPT         63 64 68 68 68 66 64 63 62 64 68 68 68 67 65 65 64 65 69 69 70 68
MAX/MIN RH                   70         100          70         100          70
RH            97100 87 76 69 81 97100100100 90 79 71 84 97100100100 87 76 72 82
WIND DIR      NW NW NW  N  N  N  N NE NE  E  E  E  E  E  E SE SE SE  S  S  S  S
WIND SPD       1  1  1  1  2  1  1  1  1  2  2  2  2  2  1  1  1  1  1  2  2  1
CLOUDS        B1 SC B1 B1 B1 SC SC SC B1 B1 B2 B1 B1 B1 B2 B1 B1 B1 B1 B2 B2 B1
CLOUDS(%)     63 43 54 67 64 34 34 50 69 64 79 67 61 69 72 63 65 65 60 87 87 51
VSBY           3  3 10 10 10 10 10  8  7  8 10 10  6  7  7 10 10  7            
POP 12HR                     50          10          50          30          80
RAIN SHWRS          IS SC SC                IS SC SC SC SC IS IS IS IS  O  O   
TSTMS               IS SC SC                IS SC SC IS             IS SC SC   
MIX HGT       <1 <1  3  3  3 <1 <1 <1 <1 <1  2  3  3 <1 <1 <1 <1 <1  3  3  3 <1
T WIND DIR     W NW  N NW  N  N  N  N  E  E  E  E SE SE SE SE SE SE  S  S SE  S
T WIND SPD     3  5  5  5  9  9  5  4  6 11 13  9  9  8  6  4  2  4  5  8 11  9
DISPERSION    VP             VP VP VP VP             VP VP VP VP             VP
ADI            2  6 20 24 30  4  3  2  3 15 34 32 34  4  3  2  1  6 18 32 37  4
MAX LVORI     10  9  4  3  3  4  8  9  9  5  4  3  3  5  8  9 10  8  4  3  3  5
STABILITY      F  A  B  B  B  G  G  F  F  B  B  B  B  F  F  F  F  B  B  B  B  F
CEILING              None  2000  None   700   600  1700  1300   900   700  1800
STA PRES            27.15 27.16 27.23 27.26 27.33 27.33 27.36 27.36 27.39 27.36


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       63      83      63      84      63      84      63      83
TEMP          65 65 79 74 65 65 80 74 66 66 80 74 66 65 79 74
DEWPT         65 65 68 68 65 65 68 68 64 66 68 68 65 65 68 68
RH           100100 69 82100100 67 82 93100 67 82 97100 69 82
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    B1 SC B1 B2 SC SC SC B2 SC SC SC B2 SC SC SC B2
POP 12HR           10      70      20      60      20      70      20      60
RAIN SHWRS          SC NM IS    IS NM IS    IS NM IS    IS NM
TSTMS               IS SC IS       SC IS    IS SC 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