National Weather Service United States Department of Commerce

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
801 PM EDT Mon Aug 3 2026

VAZ046-040800-
RAWS 441101
37.39N  78.80W Elev. 804 ft
801 PM EDT Mon Aug 3 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                 68          83          69          84          70
TEMP                73 71 69 69 76 80 79 75 72 71 71 71 77 82 81 77 73 73 72 73
DEWPT               72 70 67 67 68 70 71 72 71 71 70 71 74 75 74 75 73 72 71 72
MIN/MAX RH                   99          73          99          78          99
RH                  97 97 93 93 76 72 77 90 97100 97100 90 79 79 94100 97 97 97
WIND DIR            NE NE NE NE NE NE  E  E NE NE  E SW  S  S  S  S  S  S  S SW
WIND SPD             3  4  6  8  8  6  6  3  2  2  2  2  3  5  5  3  3  4  4  6
CLOUDS              B2 B2 B2 B2 B2 B2 OV B2 OV B2 B2 B2 B1 B2 B2 B1 B1 B1 B1 B1
CLOUDS(%)           78 76 81 79 80 76 88 86 92 80 87 85 69 73 76 60 56 51 61 55
VSBY                 9  7  7 10 10 10 10  9  9  3  2  6 10 10 10 10            
POP 12HR                     40          40          60          60          20
RAIN SHWRS          IS             IS SC NM SC SC IS SC SC NM NM IS IS         
TSTMS                              IS SC SC IS          IS SC SC IS            
Obvis               PF                                                         
MIX HGT             <1 <1 <1 <1  2  3  3 <1 <1 <1 <1 <1  2  4  3 <1            
T WIND DIR          NE NE NE NE NE  E  E  E NE  N NW  W  W SW  S  S            
T WIND SPD           6  1  4 11 12 10 14  8  8  9  8  6  6  8 11 17            
DISPERSION          VP VP PR             VP VP VP VP             VP VP VP VP   
ADI                  3  1  3 10 34 35 44  4  4  4  4  7 19 30 37  8            
MAX LVORI            9 10  6  5  3  3  3  6  9  9  9  8  4  3  3  5            
STABILITY            F  E  E  C  C  C  C  F  F  F  F  B  B  C  C  F            
CEILING              3400  2600  1100  2700  1100   400  1200  4500  None      
STA PRES            29.23 29.28 29.33 29.33 29.34 29.35 29.40 29.35            


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       87      70      88      69      88      69      89      70      90
TEMP          85 81 73 72 86 81 71 72 86 81 72 72 86 81 72 72 87 82
DEWPT         74 75 73 72 76 75 71 72 75 75 72 72 74 75 72 72 74 74
RH            70 82100100 72 82100100 70 82100100 68 82100100 65 77
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    SC B1 SC SC SC SC SC SC SC B1 SC SC B1 B1 SC SC SC SC
POP 12HR           30       5      20      20      30      20      30      20      20
RAIN SHWRS       SC          IS IS       SC IS       SC IS       IS
TSTMS            SC          IS IS       SC IS       SC IS       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