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
131 AM EDT Tue Aug 4 2026

VAZ024-050800-
RAWS 441631
37.63N  79.51W Elev. 865 ft
131 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                 66          84          68          86          69
TEMP                   70 68 68 77 83 82 77 72 70 70 71 78 84 84 78 73 72 71 72
DEWPT                  68 66 65 67 68 69 70 70 70 69 70 72 72 73 73 72 71 70 71
MIN/MAX RH                   96          61          98          66          99
RH                     93 93 90 71 61 65 79 93100 97 97 82 67 70 85 97 97 97 97
WIND DIR                N  N  N  E  E  E  E  N  N  N  N  S  S  S  S  N  N  N  S
WIND SPD                2  2  3  3  4  4  2  0  0  0  0  1  4  4  2  0  0  0  2
CLOUDS                 B1 B1 B2 B2 B2 B2 B2 OV OV OV B2 B1 B2 B2 B1 B1 B1 B1 B1
CLOUDS(%)              62 68 72 76 80 76 79 91 89 89 80 65 78 78 53 67 56 59 60
VSBY                    8  7 10 10 10 10 10  7  3  3  5 10 10 10 10            
POP 12HR                     20          30          50          70          20
RAIN SHWRS                         IS SC SC SC SC SC IS IS NM NM IS IS         
TSTMS                              IS SC SC IS             SC SC IS            
Obvis                  PF PF                                                   
MIX HGT                <1 <1 <1  2  4  3 <1 <1 <1 <1 <1  2  4  4 <1            
T WIND DIR             NE NE NE NE  E  E  E  E  N  N NW SW SW  S  S            
T WIND SPD              4  5  6 10 10 11 12  9  6  4  2  3  5 11 14            
DISPERSION             VP VP             VP VP VP VP             VP VP VP VP   
ADI                     2  3  7 29 36 39  6  4  3  2  2  9 22 40  7            
MAX LVORI               6  6  5  3  1  1  4  6  9  9  9  4  3  1  4            
STABILITY               F  F  B  B  C  C  F  F  F  F  B  B  C  C  F            
CEILING                    3300  2100  3100  2600  1800  2300  3400  3400      
STA PRES                  28.51 28.57 28.55 28.57 28.58 28.61 28.57            


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       88      68      90      68      89      68      91      68      92
TEMP          87 82 72 71 88 82 70 71 88 81 70 70 89 82 70 71 90 83
DEWPT         72 74 72 71 73 74 70 71 72 73 70 70 72 73 70 70 71 72
RH            61 77100100 61 77100100 59 77100100 57 74100 97 54 70
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    SC B2 SC SC SC B1 SC SC SC B1 SC SC B1 B1 SC SC SC SC
POP 12HR           60      20      40      20      50      20      30      10      20
RAIN SHWRS       NM IS       SC IS       SC IS       SC          IS
TSTMS            SC IS       SC IS       SC IS       SC          IS

$$


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

Radar