
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
801 AM EDT Fri Aug 7 2026
NCZ003-072000-
RAWS 310301
36.48N 80.86W Elev. 1300 ft
801 AM EDT Fri Aug 7 2026
Date Fri 08/07/26 Sat 08/08/26 Sun 08/09/26
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 84 66 84 67 87
TEMP 80 83 83 77 72 70 69 70 81 83 81 77 72 69 68 70 81 85 82 78
DEWPT 73 73 73 73 71 69 68 70 73 73 74 74 71 69 68 70 73 73 73 74
MAX/MIN RH 70 99 71 100 66
RH 79 72 72 87 97 97 97100 77 72 79 90 97100100100 77 67 74 88
WIND DIR S S SW SW N N N N S S SW N N N N NW NW SW W N
WIND SPD 2 4 4 1 0 0 0 0 1 3 3 0 0 0 0 1 1 2 2 0
CLOUDS B1 B1 B1 B2 B1 FW FW SC B1 B2 B2 B1 SC FW FW SC SC B1 B1 B1
CLOUDS(%) 58 69 65 76 51 24 20 35 53 77 79 57 36 21 21 33 34 63 63 53
VSBY 10 7 6 7 10 1 1 1 10 5 3 10 10 10 10 7 7 6 6 10
POP 12HR 50 20 60 5 40
RAIN SHWRS SC SC IS SC NM IS IS SC SC
TSTMS SC SC IS SC SC SC SC
Obvis PF F F
MIX HGT 2 3 3 <1 <1 <1 <1 <1 2 4 2 <1 <1 <1 <1 <1 3 5 1 <1
T WIND DIR W S SW S SW SW W W W SW SW W SW W NW NW W SW SW SW
T WIND SPD 3 9 11 12 4 4 3 2 11 8 9 1 4 3 3 3 3 3 9 10
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 10 32 45 6 2 2 2 2 35 35 21 1 2 2 2 3 15 21 15 5
MAX LVORI 4 3 3 5 8 8 10 9 3 3 3 6 8 10 10 9 4 3 3 5
STABILITY B C B F F G G A A B B F G G G A A B B F
CEILING None 9900 None None None 3000 None None None 3800
STA PRES 28.34 28.27 28.27 28.26 28.27 28.24 28.23 28.22 28.24 28.22
Date Mon 08/10/26Tue 08/11/26Wed 08/12/26Thu 08/13/26
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 67 88 68 89 69 88 69 86
TEMP 69 70 88 82 71 71 87 82 72 72 85 81 71 71 83 80
DEWPT 69 69 71 74 69 69 72 73 69 70 72 73 70 70 73 73
RH 100 97 57 77 93 93 61 74 90 93 65 77 97 97 72 79
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC SC SC SC FW FW SC SC FW SC B1 B1 SC SC B1
POP 12HR 5 10 0 10 5 30 10 40
RAIN SHWRS SC SC
TSTMS 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