Extreme Heat in the Southwest; Severe Weather in the Northern Plains; Heavy Rain in the East

Extreme heat continues across the Southwest as temperatures may top 120 degrees. The heat may expand across the West and south-central U.S. into the middle of the month. Severe thunderstorms capable of severe wind gusts and large hail will be the primary hazards today across the northern Plains into the upper Midwest. Rainfall could be locally heavy across the Eastern U.S. today. Read More >

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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 AM EDT Tue Aug 4 2026

VAZ012-050800-
RAWS 447502
37.01N  81.18W Elev. 2540 ft
231 AM EDT Tue Aug 4 2026

Date           08/03/26      Tue 08/04/26            Wed 08/05/26            Thu
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          80          63          82          63
TEMP                      64 64 73 78 76 70 67 66 65 65 73 77 80 74 67 65 64 65
DEWPT                     63 64 68 68 69 67 66 66 65 65 69 69 70 68 66 65 64 65
MIN/MAX RH                  100          70         100          72         100
RH                        97100 84 71 79 90 97100100100 87 76 72 82 97100100100
WIND DIR                   E  E  E  E  E SE  E SE SE SE  S  S  S  S  S  S  S  S
WIND SPD                   2  3  2  2  2  2  2  1  1  1  1  2  2  1  1  1  1  1
CLOUDS                    B2 B2 B2 B1 B2 B2 B2 B2 B2 B1 SC B2 B2 SC SC SC B1 B1
CLOUDS(%)                 85 78 79 69 71 75 86 75 81 65 40 73 79 35 42 38 55 57
VSBY                       6  7 10 10 10 10  6  3  3  6 10 10 10 10            
POP 12HR                     20          50          30          70           5
RAIN SHWRS                IS       IS SC IS IS             NM NM             SC
TSTMS                              IS SC IS                SC SC               
MIX HGT                   <1  1  2  3  3 <1 <1 <1 <1 <1  2  4  3 <1            
T WIND DIR                 E  E  E SE  E  E SE SE  S  S SW  S  S  S            
T WIND SPD                 5 11 12  9  9  8  5  6  6  4  5  5  8 11            
DISPERSION                VP             VP VP VP VP             VP VP VP VP   
ADI                        3 17 34 37 33  4  3  3  3  5 18 30 27  5            
MAX LVORI                  9  5  4  3  3  6  9  9  9  9  4  3  3  5            
STABILITY                  F  B  B  B  B  F  F  F  F  B  B  B  B  G            
CEILING                     400   100  1700   400   100  None  2600  None      
STA PRES                  27.24 27.30 27.29 27.32 27.34 27.37 27.34            


Date           08/06Fri 08/07/26Sat 08/08/26Sun 08/09/26Mon 08/10/26
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       83      62      84      62      83      63      84      63      85
TEMP          81 71 65 65 82 74 64 65 79 74 65 65 80 75 65 66 82 77
DEWPT         69 68 65 65 68 68 64 65 69 68 65 65 68 68 65 66 68 68
RH            67 90100100 63 82100100 72 82100100 67 79100100 63 74
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    B1 OV B1 B1 B1 B2 B1 SC SC B2 SC B1 B1 B1 SC SC SC B1
POP 12HR           90      10      70      20      70      20      40      10      30
RAIN SHWRS    SC  O       SC NM IS    IS NM IS    IS SC          SC
TSTMS         IS SC       SC SC IS       SC IS    IS SC          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

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