National Weather Service United States Department of Commerce

Heavy Rainfall and Severe Thunderstorms in the Midwest and Ohio Valley Tuesday

Multiple rounds of severe thunderstorms appear likely Tuesday across the Midwest and Ohio Valley, with severe wind gusts in excess of 75 mph as the primary threat. Heavy to excessive rainfall may lead to considerable flash and urban flooding impacts Tuesday across portions of the Ohio Valley. A Moderate Risk (level 3 of 4) of excessive rainfall has been issued. Read More >

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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1231 AM EDT Tue Aug 11 2026

VAZ024-120800-
RAWS 441631
37.63N  79.51W Elev. 865 ft
1231 AM EDT Tue Aug 11 2026

Date           08/10/26      Tue 08/11/26            Wed 08/12/26            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                 70          92          70          92          68
TEMP                   72 73 74 83 89 90 83 77 74 72 73 85 91 90 82 75 71 69 71
DEWPT                  66 67 67 70 69 69 70 69 69 68 69 71 70 70 70 71 70 69 70
MIN/MAX RH                   87          49          94          50         100
RH                     81 81 79 65 52 50 65 76 84 87 87 63 50 52 67 87 97100 97
WIND DIR               NW  W  W NW NW  W NW  W SW SW  W  W  W  W  W  W  W  W  W
WIND SPD                2  2  2  4  5  5  3  2  2  3  4  4  5  5  2  1  1  1  1
WIND GUST                       14 16 16          13 14 14                     
CLOUDS                 B1 B1 B1 SC B2 SC B1 B2 SC FW SC B1 SC SC B1 B1 SC B1 B1
CLOUDS(%)              51 63 63 34 75 32 62 72 49 23 46 53 46 40 60 60 49 60 53
VSBY                    9 10 10 10 10 10 10  9 10 10 10 10 10 10 10            
POP 12HR                     30          20          40          20          40
RAIN SHWRS                IS       IS    SC SC IS          IS IS SC SC IS IS   
TSTMS                              IS    SC                IS IS IS IS         
MIX HGT                <1 <1 <1  3  4  4 <1 <1 <1 <1 <1  3  5  5 <1            
T WIND DIR              W NW  W NW NW NW  W SW  W NW NW NW NW  W SW            
T WIND SPD             12  4 11 13  8  9  9  3  3  5  8  9 18  9  6            
DISPERSION             VP VP             VP VP VP VP             VP VP VP VP   
ADI                     6  2 12 52 31 49  6  2  2  3  8 28116 60  3            
MAX LVORI               4  5  4  1  1  1  3  4  5  6  5  2  1  1  3            
STABILITY               F  F  B  B  C  A  E  F  F  F  B  C  A  A  F            
CEILING                   11200  None  None  7800  None  None  None 10400      
STA PRES                  28.48 28.51 28.46 28.44 28.42 28.44 28.38            


Date           08/13Fri 08/14/26Sat 08/15/26Sun 08/16/26Mon 08/17/26
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       93      71      89      68      88      68      93      70      93
TEMP          92 86 75 73 87 81 71 69 86 81 72 70 91 83 74 72 91 83
DEWPT         70 71 71 71 71 71 70 67 68 70 69 68 71 71 71 70 70 70
RH            49 61 87 93 59 72 97 93 55 69 90 93 52 67 90 93 50 65
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    SC SC SC B1 B1 B2 B1 B1 B1 B1 SC B1 SC SC SC SC SC B1
POP 12HR           10      20      40      30      30      20      30      20      30
RAIN SHWRS          IS    SC SC SC IS IS SC IS       SC IS    IS SC
TSTMS               IS       SC IS       SC 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