
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