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
231 AM EDT Mon Aug 10 2026

VAZ024-110800-
RAWS 441631
37.63N  79.51W Elev. 865 ft
231 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                 69          95          72          94          70
TEMP                      70 73 87 92 93 85 78 75 73 75 86 91 91 83 76 73 72 73
DEWPT                     67 68 70 68 67 68 69 68 68 69 70 69 69 70 70 69 68 69
MIN/MAX RH                   91          43          85          48          90
RH                        90 84 57 46 43 57 74 79 84 82 59 49 49 65 82 87 87 87
WIND DIR                  SW  W  W  W  W  W  W  W  W  W  W  W  W  W  W  W  W  W
WIND SPD                   1  1  3  5  5  3  3  3  3  3  5  6  6  4  2  2  3  3
CLOUDS                    SC SC SC SC SC SC SC SC B1 B1 B1 B1 SC B1 B1 B1 B1 B1
CLOUDS(%)                 44 36 30 39 32 31 40 46 52 55 59 55 44 62 62 64 53 60
VSBY                       5  6 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR                      5          10          10          30          40
RAIN SHWRS                                                 SC IS SC SC IS IS   
TSTMS                                                      SC IS SC SC         
MIX HGT                   <1 <1  3  6  5 <1 <1 <1 <1 <1  4  6  5 <1 <1 <1 <1  1
T WIND DIR                NW NW  W  W SW  W  W NW NW  W NW NW  W  W  W NW  W NW
T WIND SPD                 2  3  4  8 12  6  6 11  9 23 11 20  8  4  3  3  3  2
DISPERSION                VP             VP VP VP VP             VP VP VP VP   
ADI                        1  3 20 61 79  3  3  5  4 24 54 90 44  3  2  2  2  3
MAX LVORI                  6  5  2  1  1  3  3  4  5  3  1  1  1  3  5  6  6  6
STABILITY                  F  A  A  A  A  G  G  F  F  B  B  C  B  E  F  F  F  B
CEILING                    None  None  None  None  None  None  None 17100  7100
STA PRES                  28.59 28.61 28.53 28.54 28.56 28.54 28.49 28.50 28.46


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       93      70      94      71      88      67      88      67      91
TEMP          90 82 73 73 91 86 74 72 86 80 71 69 86 80 70 69 89 82
DEWPT         69 70 69 70 68 71 71 70 71 70 69 66 68 68 67 67 70 70
RH            50 67 87 90 47 61 90 93 61 72 93 90 55 67 90 93 54 67
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    B1 B1 B1 B1 SC B1 B1 B1 B1 B2 B1 B1 B1 B1 B1 B1 SC SC
POP 12HR           30      30      20      20      50      30      30      30      20
RAIN SHWRS       SC SC       IS IS    SC SC SC IS    SC SC       IS
TSTMS            SC SC       IS 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