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

VAZ024-030800-
RAWS 441631
37.63N  79.51W Elev. 865 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                 71          87          67          84          67
TEMP                73 71 71 72 78 84 84 78 72 69 67 68 77 83 84 78 71 69 67 69
DEWPT               71 69 69 70 72 70 70 72 71 69 67 68 70 70 70 71 70 69 67 69
MIN/MAX RH                   95          62         100          62         100
RH                  93 93 93 93 82 63 63 82 97100100100 79 65 63 79 97100100100
WIND DIR             S  S  S SW SW SW  S  N  N  N  N  N NE  E  E  E  N  N  N  N
WIND SPD             3  2  1  1  3  4  3  3  1  1  2  2  2  3  3  1  0  0  0  0
CLOUDS              B2 B2 OV B2 B1 B1 B1 B1 B1 B2 B2 OV B2 B2 B1 B1 B1 B1 B2 B2
CLOUDS(%)           83 87 93 71 56 53 51 61 65 75 73 88 73 72 62 62 68 69 77 72
VSBY                 4  3  3  2  9 10 10 10 10  9 10  7  7  6  6  6  6  7  7  7
POP 12HR                     60          40          50          40          40
RAIN SHWRS          SC IS             SC SC SC SC    IS IS SC SC SC SC SC SC IS
TSTMS                                 SC SC                SC SC IS            
MIX HGT             <1 <1 <1 <1  3  5  3 <1 <1 <1 <1 <1  2  3  3 <1            
T WIND DIR           S  S  S SW  W NW NW NW NE  N NE NE NE  E  E  E            
T WIND SPD           8  6  6  5  3  5  3  3  5  5 10 11 11  9  6  5            
DISPERSION          VP VP VP             VP VP VP VP             VP VP VP VP   
ADI                  4  3  3  6 12 35 14  2  3  3  5 12 36 36 24  3            
MAX LVORI            9  9  9  8  4  1  2  5  8  9  9  5  3  3  2  4            
STABILITY            F  F  F  B  B  A  B  F  F  F  F  B  B  B  B  F            
CEILING              2300     0  1000  None  3100  3300  2900  2900  1800      
STA PRES            28.29 28.30 28.34 28.34 28.43 28.48 28.54 28.52            


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       86      68      88      69      89      69      89      68      88
TEMP          84 80 71 70 87 81 71 70 87 81 71 71 88 81 71 69 86 80
DEWPT         72 73 71 70 73 73 71 70 73 73 71 71 73 73 70 69 72 73
RH            67 79100100 63 77100100 63 77100100 61 77 97100 63 79
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    B1 B2 B1 B1 B1 B2 SC SC SC B1 B1 SC SC B1 SC SC B1 B1
POP 12HR           70      20      60      20      50      20      50      20      40
RAIN SHWRS    IS NM IS       NM IS       SC IS       SC IS    IS SC
TSTMS         IS SC IS       SC          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