
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
401 AM EDT Tue Aug 11 2026
VAZ018-112000-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
401 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 88 69 86 68 88
TEMP 71 72 82 86 86 76 73 71 70 70 77 83 85 78 72 70 69 71 80 85 86 78
DEWPT 67 68 71 70 70 70 68 68 67 67 71 71 71 70 68 68 67 68 71 71 72 71
MAX/MIN RH 59 92 63 94 61
RH 87 87 69 59 59 82 84 90 90 90 82 67 63 76 87 93 93 90 74 63 63 79
WIND DIR NW NW NW NW NW W W W W W W W W W W W W W W W W NW
WIND SPD 6 6 8 6 6 5 6 6 8 9 8 8 6 4 4 4 4 4 5 6 6 4
WIND GUST 25 26 23 19 19 18 23 25 26 29 25 23 20 16 14 14 14 14 17 17 18 14
CLOUDS B1 B1 SC B1 SC B1 B1 SC B2 B1 B1 B1 SC B1 B1 B1 B1 B1 B1 B1 B1 B1
CLOUDS(%) 57 65 33 64 34 66 64 46 72 58 66 55 32 52 52 65 65 55 60 62 59 64
VSBY 9 6 10 10 10 10 8 10 9 6 10 10 10 10 10 10 10 5 10 10 10
POP 12HR 40 50 30 30 40
RAIN SHWRS SC SC IS SC IS IS SC SC SC SC SC SC SC SC
TSTMS IS IS IS SC SC IS IS IS IS
MIX HGT <1 <1 2 4 3 <1 <1 <1 <1 1 3 5 4 <1 <1 <1 <1 1 3 3 4 <1
T WIND DIR W NW NW NW W NW NW NW W W W W W W W W W NW W W NW NW
T WIND SPD 8 9 14 19 10 11 12 6 4 3 9 19 17 17 6 5 6 12 9 6 13 16
DISPERSION PR PR PR PR PR VP VP VP VP VP
ADI 5 10 43 69 33 8 8 5 4 4 26 80 84 12 5 4 5 17 29 23 54 11
MAX LVORI 5 5 3 1 1 4 5 5 5 6 3 1 1 4 5 6 6 4 3 2 1 4
STABILITY E B B C B E E E D C C C B E E E E C C C C E
CEILING None None 13100 2100 1400 None None 8700 6600 2800
STA PRES 27.81 27.78 27.79 27.77 27.75 27.69 27.68 27.68 27.70 27.72
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 70 86 66 84 66 87 70 85
TEMP 72 72 83 77 69 67 81 75 69 68 85 78 72 71 83 76
DEWPT 69 69 72 69 66 64 68 68 65 65 70 70 68 68 71 70
RH 90 90 70 76 90 90 65 79 87 90 61 76 87 90 67 82
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B1 B1 B1 B1 SC SC B1 SC SC SC SC SC SC SC B1
POP 12HR 50 40 20 20 20 20 30 30
RAIN SHWRS SC IS SC SC IS IS IS IS IS IS SC SC
TSTMS IS SC 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