National Weather Service United States Department of Commerce

Severe Thunderstorms and Heavy Rain Across the Ohio Valley;

Severe thunderstorms with damaging wind gusts will be possible from the mid-Mississippi Valley into parts of the Ohio Valley and central Appalachians. Heavy rain associated with these storms may lead to considerable flash and urban flooding impacts across portions of the Ohio Valley. Mid-summer heat persists from the Central Plains to the Southeast. Read More >

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

NCZ003-112000-
RAWS 310302
36.35N  80.48W Elev. 1076 ft
801 AM EDT Tue Aug 11 2026

Date             Tue 08/11/26            Wed 08/12/26            Thu 08/13/26
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00
EDT 3hrly     05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20

MAX/MIN TEMP                 91          71          90          71          91
TEMP                82 88 87 80 74 72 71 72 81 87 88 81 75 72 71 72 82 88 90 84
DEWPT               72 71 71 71 70 69 68 69 71 71 71 71 71 70 69 70 72 72 72 72
MAX/MIN RH                   55          91          56          95          55
RH                  72 57 59 74 87 90 90 90 72 59 57 72 87 93 93 93 72 59 56 67
WIND DIR             W  W NW  W NW  W  W  W  W  W  W  W  W NW  W  W  W  W  W NW
WIND SPD             4  5  4  3  4  4  5  5  5  5  5  3  3  3  3  3  4  5  4  2
CLOUDS              FW FW B1 B2 B1 SC SC B1 B1 SC SC SC SC SC B1 B1 B1 SC SC SC
CLOUDS(%)            9 17 54 75 65 36 43 52 53 40 50 40 28 37 61 51 51 44 43 33
VSBY                10 10 10 10 10 10  7 10 10 10 10 10 10 10 10 10 10 10 10   
POP 12HR                     30          10          30          10          10
RAIN SHWRS                IS                   IS SC                           
TSTMS                     IS                   IS SC                           
MIX HGT              3  5  3 <1 <1 <1 <1 <1  2  5  5 <1 <1 <1 <1 <1  2  5  3 <1
T WIND DIR           W  W  W  W NW NW  W  W  W  W  W NW  W  W  W  W  S  W  W NW
T WIND SPD          14 14 19  8  2  2  3  4  4 11 13  3  2  3  2  2  4 20 18  5
DISPERSION                   VP VP VP PR             VP VP VP VP             VP
ADI                 57 93 58  4  2  1  2  5 14 73 84  2  1  2  1  2 11125 82  3
MAX LVORI            3  1  1  3  6  7  6  6  3  1  1  3  6  7  7  6  3  1  1  3
STABILITY            A  A  C  F  E  F  E  B  A  A  A  G  G  G  F  B  C  A  A  G
CEILING              None  None  None  None  None  None  None  None  None  None
STA PRES            28.94 28.90 28.93 28.93 28.90 28.84 28.82 28.82 28.85 28.84


Date          Fri 08/14/26Sat 08/15/26Sun 08/16/26Mon 08/17/26
UTC 6hrly     06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
EDT 6hrly     02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20

MIN/MAX TEMP       72      91      71      86      69      88      71      91
TEMP          74 74 89 83 74 71 83 79 71 71 86 82 73 73 88 82
DEWPT         71 70 72 71 70 68 69 69 68 69 70 71 70 70 71 70
RH            90 87 57 67 87 90 63 72 90 93 59 69 90 90 57 67
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    SC SC B1 B1 B1 SC SC B1 SC SC SC SC SC SC SC B1
POP 12HR           10      20      20      20      10      20      20      30
RAIN SHWRS             IS IS IS    IS          IS IS       SC
TSTMS                  IS IS       IS          IS IS       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