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
601 PM EDT Sun Aug 2 2026

NCZ001-030800-
RAWS 310142
36.40N  81.46W Elev. 4608 ft
601 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                 62          71          61          69          62
TEMP             66 65 64 63 62 65 67 67 63 63 62 62 61 64 68 67 63 63 63 63 63
DEWPT            65 63 63 62 62 64 65 66 63 63 62 62 61 63 64 65 63 63 63 63 62
MIN/MAX RH                   99          94         100          87         100
RH               97 93 97 97100 97 93 97100100100100100 97 87 93100100100100 97
WIND DIR          S SW  W  W  W SW SW  W  E NE  E  E  E  E SE SE  E  E SE  E SE
WIND SPD          5  4  4  4  3  3  3  3  2  4  5  5  6  5  5  6  5  6  8  5  5
CLOUDS           B1 B2 B1 SC B1 SC B1 B1 B2 B1 B2 B2 B2 B1 B2 B2 B1 B1 B1 B2 B2
CLOUDS(%)        60 80 57 50 54 50 69 65 79 54 72 80 80 63 86 86 64 67 68 73 74
VSBY             10  6  5  2  2 10 10 10 10  9  8 10  6  6  6  6  6  6  7  7  6
POP 12HR                     60          70          40          80          40
RAIN SHWRS       NM SC          IS NM NM SC IS       SC SC  O  O SC SC IS IS SC
TSTMS            IS                SC SC IS             IS SC SC IS            
MIX HGT          <1 <1 <1 <1 <1  2  3  2 <1 <1 <1 <1 <1  2  2  2  1            
T WIND DIR        S  S  W NW NW NW SW NW  N  N NE  E  E  E SE SE  E            
T WIND SPD        9  5  5  4  5  3  2  1  5  6  9  6  6 11  5  8  3            
DISPERSION       PR VP VP VP             VP VP PR PR             PR PR PR PR   
ADI               6  4  4  3  4 11  9  3  3  5  6  5  5 23 16 20  2            
MAX LVORI         8  9  9  9  9  6  5  6  9  9  8  9  9  5  4  5  9            
STABILITY         E  E  E  E  C  B  B  B  F  E  E  E  C  C  C  C  E            
CEILING               300  None  1900   400   400   400   500   500  4900      
STA PRES            26.54 26.56 26.61 26.61 26.66 26.68 26.73 26.73            


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       70      63      72      63      72      63      73      62      72
TEMP          69 67 65 63 69 66 63 63 70 66 64 63 70 66 64 62 70 65
DEWPT         65 64 63 63 65 64 63 63 66 64 63 63 66 64 63 62 65 64
RH            87 90 93100 87 93100100 87 93 97100 87 93 97100 84 97
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    B1 OV SC SC B1 B2 B1 SC B1 B2 B1 SC B1 B2 B1 B1 B1 B2
POP 12HR           80      10      80      20      80      20      80      20      60
RAIN SHWRS    SC  O       SC  O IS    SC  O IS    SC  O IS    SC NM
TSTMS         IS SC       SC SC IS    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