
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