National Weather Service United States Department of Commerce

Severe Weather and Heavy Rainfall from the Midwest to the Ohio Valley; Mid-Summer Heat Continues

Severe thunderstorm and heavy rainfall threats will persist from the Midwest to Lower Great Lakes through Monday, shifting into the Ohio Valley and Central Appalachians Monday evening into Tuesday. Mid-summer heat will continue across much of the CONUS this week, with record highs possible well into the 100s across the south-central High Plains. Read More >

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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
131 AM EDT Mon Aug 10 2026

VAZ012-110800-
RAWS 447502
37.01N  81.18W Elev. 2540 ft
131 AM EDT Mon Aug 10 2026

Date           08/09/26      Mon 08/10/26            Tue 08/11/26            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                 64          87          67          86          65
TEMP                   65 64 66 77 83 86 79 71 69 68 68 77 82 84 77 69 68 67 66
DEWPT                  64 63 66 69 68 68 67 67 67 67 67 70 69 69 68 67 66 66 66
MIN/MAX RH                   98          55          99          60         100
RH                     97 97100 76 61 55 67 87 93 97 97 79 65 61 74 93 93 97100
WIND DIR                W  W  W  W  W  W  W  W  W  W  W  W  W  W  W  W  W  W  W
WIND SPD                2  2  2  3  3  3  3  3  3  3  3  3  3  3  3  3  3  4  4
WIND GUST                                                              13      
CLOUDS                 B1 SC B1 B1 SC SC FW FW SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1
CLOUDS(%)              52 46 60 54 49 31 24  8 28 45 57 57 69 69 58 58 54 57 66
VSBY                    8  6  7 10 10 10 10  9  8  8  8 10  6  6  7  7  7  7  7
POP 12HR                     30          10          20          50          40
RAIN SHWRS                                     IS    SC SC SC SC SC SC SC SC SC
TSTMS                                          IS       IS SC SC SC IS IS    IS
Obvis                     PF                                                   
MIX HGT                <1 <1 <1  3  4  4 <1 <1 <1 <1 <1  3  3  3 <1            
T WIND DIR             SW  W  W  W  W  W SW  W  W  W  W NW  W  W  W            
T WIND SPD              3  4  5 11 13 14 12  6  5  8  8 23 16 20  9            
DISPERSION             VP VP             VP VP VP VP             VP VP VP VP   
ADI                     2  2  6 44 74 69  6  3  3  4  8 75 56 84  4            
MAX LVORI               7  8  8  3  1  1  3  6  6  8  8  3  1  1  3            
STABILITY               F  F  B  B  A  A  G  G  G  F  B  B  B  B  F            
CEILING                    None  None  None  None  None   200   500   100      
STA PRES                  27.38 27.38 27.33 27.37 27.34 27.35 27.26            


Date           08/12Thu 08/13/26Fri 08/14/26Sat 08/15/26Sun 08/16/26
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       85      66      84      65      80      63      82      64      83
TEMP          80 75 68 67 80 75 68 66 77 72 65 65 78 74 67 65 78 74
DEWPT         69 68 67 67 70 69 67 66 69 68 65 65 68 67 65 65 69 67
RH            69 79 97100 72 82 97100 76 87100100 71 79 93100 74 79
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    B1 B1 B1 B1 B1 B1 B1 B1 B2 B2 B1 B1 B2 B1 SC B1 B1 B1
POP 12HR           50      40      40      30      60      40      50      40      40
RAIN SHWRS    SC SC SC    IS SC SC SC SC NM SC SC SC SC SC SC SC SC
TSTMS         SC SC IS       SC       IS SC IS       IS 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