
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
631 PM EDT Thu Aug 6 2026
VAZ012-070800-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
631 PM EDT Thu Aug 6 2026
Date 08/06/26 Fri 08/07/26 Sat 08/08/26 Sun
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 80 63 83 63
TEMP 74 68 66 65 66 74 78 79 72 67 66 65 66 76 82 80 73 68 66 64 66
DEWPT 68 66 65 64 65 68 68 68 68 66 65 64 66 70 69 68 67 66 65 64 66
MIN/MAX RH 98 68 100 64 100
RH 82 93 97 97 97 82 71 69 87 97 97 97100 82 65 67 81 93 97100100
WIND DIR SW SW S W SW SW SW SW SW SW SW W W W W W SW W W W W
WIND SPD 2 1 2 2 2 5 4 5 3 1 2 2 2 2 2 2 2 2 2 2 2
CLOUDS B2 B2 B1 SC SC SC B1 B1 SC SC FW FW SC SC B2 B2 SC SC SC SC B1
CLOUDS(%) 71 70 52 45 49 48 69 52 35 32 11 23 28 37 82 82 39 37 35 43 57
VSBY 10 9 6 5 4 10 10 10 10 10 9 10 7 7 6 6 10 10 10 10 7
POP 12HR 20 40 10 70 10
RAIN SHWRS IS IS SC SC IS IS NM NM
TSTMS IS SC SC IS SC SC
MIX HGT <1 <1 <1 <1 <1 3 4 3 <1 <1 <1 <1 <1 3 4 3 <1
T WIND DIR SW SW S SW W SW SW SW SW SW SW SW SW W W W W
T WIND SPD 6 2 2 3 4 5 12 14 10 5 5 8 16 23 13 10 9
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 3 1 1 2 5 20 55 53 5 3 3 4 18 78 71 39 4
MAX LVORI 6 7 8 10 9 3 1 3 5 8 8 9 5 3 1 3 5
STABILITY F F F F B A B A G G G G A A B B G
CEILING 6900 None None None None None None 4200 None
STA PRES 27.44 27.46 27.48 27.40 27.40 27.38 27.40 27.36
Date 08/09Mon 08/10/26Tue 08/11/26Wed 08/12/26Thu 08/13/26
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 63 87 64 86 65 83 65 82
TEMP 82 77 66 65 83 78 67 67 82 77 68 68 80 75 67 66 78 74
DEWPT 67 66 64 65 67 67 65 67 68 68 66 66 69 68 66 66 69 68
RH 61 69 93100 59 69 93100 63 74 93 93 69 79 97100 74 82
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC SC FW SC SC FW SC SC SC B1 SC B1 B1 B1 B1 B1 B2
POP 12HR 20 5 20 10 20 30 50 40 60
RAIN SHWRS IS IS IS SC IS SC SC IS SC NM
TSTMS IS IS IS IS SC 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