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
131 AM EDT Mon Aug 10 2026
VAZ012-110800-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
131 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 64 87 67 86 65
TEMP 65 64 66 77 83 86 79 71 69 68 68 77 82 84 77 69 68 67 66
DEWPT 64 63 66 69 68 68 67 67 67 67 67 70 69 69 68 67 66 66 66
MIN/MAX RH 98 55 99 60 100
RH 97 97100 76 61 55 67 87 93 97 97 79 65 61 74 93 93 97100
WIND DIR W W W W W W W W W W W W W W W W W W W
WIND SPD 2 2 2 3 3 3 3 3 3 3 3 3 3 3 3 3 3 4 4
WIND GUST 13
CLOUDS B1 SC B1 B1 SC SC FW FW SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1
CLOUDS(%) 52 46 60 54 49 31 24 8 28 45 57 57 69 69 58 58 54 57 66
VSBY 8 6 7 10 10 10 10 9 8 8 8 10 6 6 7 7 7 7 7
POP 12HR 30 10 20 50 40
RAIN SHWRS IS SC SC SC SC SC SC SC SC SC
TSTMS IS IS SC SC SC IS IS IS
Obvis PF
MIX HGT <1 <1 <1 3 4 4 <1 <1 <1 <1 <1 3 3 3 <1
T WIND DIR SW W W W W W SW W W W W NW W W W
T WIND SPD 3 4 5 11 13 14 12 6 5 8 8 23 16 20 9
DISPERSION VP VP VP VP VP VP VP VP VP VP
ADI 2 2 6 44 74 69 6 3 3 4 8 75 56 84 4
MAX LVORI 7 8 8 3 1 1 3 6 6 8 8 3 1 1 3
STABILITY F F B B A A G G G F B B B B F
CEILING None None None None None 200 500 100
STA PRES 27.38 27.38 27.33 27.37 27.34 27.35 27.26
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 85 66 84 65 80 63 82 64 83
TEMP 80 75 68 67 80 75 68 66 77 72 65 65 78 74 67 65 78 74
DEWPT 69 68 67 67 70 69 67 66 69 68 65 65 68 67 65 65 69 67
RH 69 79 97100 72 82 97100 76 87100100 71 79 93100 74 79
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B1 B1 B1 B1 B1 B1 B1 B2 B2 B1 B1 B2 B1 SC B1 B1 B1
POP 12HR 50 40 40 30 60 40 50 40 40
RAIN SHWRS SC SC SC IS SC SC SC SC NM SC SC SC SC SC SC SC SC
TSTMS SC SC IS SC IS SC IS IS 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
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