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

VAZ012-030800-
RAWS 447502
37.01N  81.18W Elev. 2540 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                 66          81          62          79          63
TEMP                68 67 66 67 73 76 76 72 65 63 63 64 72 75 78 72 66 64 63 65
DEWPT               66 65 64 65 68 67 67 67 65 63 63 64 68 68 68 67 65 64 63 65
MIN/MAX RH                   96          74         100          69         100
RH                  93 93 93 93 84 74 74 84100100100100 87 79 71 84 97100100100
WIND DIR             W  W  W  W  W  W NW  N  N  N  E  E  E  E  E SE SE  E SE SE
WIND SPD             2  2  2  2  3  3  3  2  1  1  1  2  2  2  2  2  1  1  1  1
CLOUDS              B2 B1 B2 B1 B1 B1 B1 B1 B1 B1 B2 B2 B2 B2 B2 B1 B2 B1 B2 B2
CLOUDS(%)           78 63 70 52 51 63 51 63 53 62 87 87 73 75 75 55 73 66 75 70
VSBY                 8  6  3  2 10 10 10 10  8  5 10  7  7  6  6  7  7 10 10  7
POP 12HR                     60          70          20          60          20
RAIN SHWRS          SC          SC NM SC IS          SC SC NM NM IS IS       SC
TSTMS                           IS SC SC IS             IS SC SC               
Obvis                     PF PF                                                
MIX HGT             <1 <1 <1 <1  3  3  3 <1 <1 <1 <1 <1  2  3  3 <1            
T WIND DIR           S SW  W NW NW NW NW  N  N NE NE  E  E SE  E SE            
T WIND SPD           4  4  3  9  8  6  5  8  8  5  4 10 14  8  8  9            
DISPERSION          VP VP VP             VP VP VP VP             VP VP VP VP   
ADI                  2  2  2 10 28 29 21  4  4  3  2 11 37 28 27  4            
MAX LVORI            9  9 10  8  4  3  3  5  9  9  9  7  4  3  3  5            
STABILITY            F  F  F  B  B  B  B  F  F  F  F  B  B  B  B  F            
CEILING               700   700  None  1200  None     0   600  2200  1700      
STA PRES            27.08 27.09 27.15 27.16 27.21 27.23 27.28 27.27            


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       80      63      82      63      83      64      83      63      82
TEMP          77 74 66 65 78 73 65 66 79 74 65 66 79 74 65 65 78 73
DEWPT         69 68 65 65 69 69 65 66 69 68 65 66 69 69 65 65 69 69
RH            76 82 97100 74 87100100 72 82100100 72 84100100 74 87
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    B1 B2 SC SC B1 B2 SC SC B1 B2 B1 SC B1 B2 SC SC B1 B2
POP 12HR           80       5      70      10      60      20      70      20      60
RAIN SHWRS    SC  O       SC NM       SC NM IS    SC NM IS    SC NM
TSTMS         IS SC       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