
Scattered showers and storms are expected across portions of the Central and Eastern U.S. through the end of the week. Meanwhile, dangerous heat will intensify across the Desert Southwest and Intermountain West. Hot, dry weather and increasing winds will allow elevated wildfire conditions to return to the northern Intermountain West, where air quality issues persist from ongoing fires. Read More >
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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
831 PM EDT Sat Aug 8 2026
VAZ012-090800-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
831 PM EDT Sat Aug 8 2026
Date 08/08/26 Sun 08/09/26 Mon 08/10/26 Tue
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 86 64 86 65
TEMP 68 67 65 66 77 83 83 75 68 67 66 66 77 83 85 78 70 68 65 67
DEWPT 66 65 65 66 69 68 68 67 66 65 64 66 69 68 68 67 67 66 65 67
MIN/MAX RH 100 56 100 56 100
RH 93 93100100 76 61 61 76 93 93 93100 76 61 57 69 90 93100100
WIND DIR W W W W W W W W W W W W W W W W W W W W
WIND SPD 2 2 2 2 1 1 1 1 1 2 2 2 2 2 2 2 2 3 3 3
CLOUDS B2 SC B2 B1 B1 B1 SC B1 B1 SC B1 SC B2 B1 SC SC SC SC SC SC
CLOUDS(%) 71 49 73 65 63 58 48 51 58 47 53 43 70 61 40 32 38 30 34 42
VSBY 10 9 6 6 10 10 10 10 10 7 8 8 10 7 7 10 10 10 10 10
POP 12HR 10 30 10 20 10
RAIN SHWRS IS IS IS IS
TSTMS IS IS IS IS
MIX HGT <1 <1 <1 <1 3 5 3 <1 <1 <1 <1 <1 3 3 4 <1
T WIND DIR W W W W NW W W W W SW W W W W W W
T WIND SPD 5 5 5 4 9 8 12 6 3 3 4 2 6 9 12 9
DISPERSION VP VP VP VP VP VP VP VP VP VP VP
ADI 3 3 3 5 33 47 50 3 2 2 2 2 22 39 72 4
MAX LVORI 6 6 9 9 3 1 1 4 7 7 8 9 3 1 1 3
STABILITY F F F B B B A F F F F A B B A G
CEILING 16100 200 200 None None None 1500 None None
STA PRES 27.39 27.40 27.43 27.40 27.41 27.39 27.42 27.39
Date 08/11Wed 08/12/26Thu 08/13/26Fri 08/14/26Sat 08/15/26
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 86 65 84 65 83 65 81 63 81
TEMP 83 78 69 66 80 75 68 67 79 74 67 66 77 73 65 65 78 73
DEWPT 69 68 66 66 69 68 67 67 70 68 66 66 69 67 64 65 68 66
RH 63 71 90100 69 79 97100 74 82 97100 76 81 97100 71 79
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC B1 B1 SC B1 B1 B1 B1 B2 B1 B1 B1 B2 B2 B1 B1 B1 B1
POP 12HR 50 30 30 50 40 30 60 30 50
RAIN SHWRS SC SC SC IS SC SC IS IS SC SC SC SC NM SC IS SC SC
TSTMS SC IS IS SC IS IS SC IS 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