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
501 AM EDT Sat Aug 8 2026
VAZ018-082000-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
501 AM EDT Sat Aug 8 2026
Date Sat 08/08/26 Sun 08/09/26 Mon 08/10/26
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 88 69 89 69 90
TEMP 70 82 86 84 75 73 71 69 71 81 86 87 76 73 70 69 71 83 88 89 80
DEWPT 68 70 70 71 70 68 68 67 68 71 70 68 68 67 66 65 67 70 69 68 69
MAX/MIN RH 59 92 54 91 50
RH 93 67 59 65 84 84 90 93 90 72 59 53 76 81 87 87 87 65 54 50 69
WIND DIR W W W W W W W NW NW W W W W W W W W W W W W
WIND SPD 3 4 4 5 3 3 3 3 3 4 4 4 2 2 2 2 2 3 4 4 3
WIND GUST 14 13
CLOUDS SC SC B1 B1 B1 B1 SC B1 B1 B2 B1 SC SC SC SC SC SC SC SC FW FW
CLOUDS(%) 32 37 69 51 52 61 43 66 69 72 68 27 45 41 43 39 32 26 34 25 22
VSBY 4 10 10 10 10 9 9 7 0 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 30 5 10 5 5
RAIN SHWRS IS SC
TSTMS IS SC
Obvis PF
MIX HGT <1 4 5 4 <1 <1 <1 <1 <1 4 6 5 <1
T WIND DIR W W W W W W W W W W W W W
T WIND SPD 4 16 14 14 12 4 4 5 5 12 9 8 8
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 5 76 63 68 6 2 2 3 6 58 41 49 4
MAX LVORI 6 1 1 1 4 5 6 6 6 1 1 1 4
STABILITY A A C A F G G F A A C A G
CEILING None None None 11000 4800 None None
STA PRES 27.93 27.87 27.89 27.89 27.91 27.87
Date Tue 08/11/26Wed 08/12/26Thu 08/13/26Fri 08/14/26
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 70 90 70 87 69 86 68 84
TEMP 71 72 89 79 72 72 84 77 71 71 84 77 71 70 81 75
DEWPT 67 68 70 70 68 68 71 70 68 68 71 69 68 67 70 69
RH 87 87 54 74 87 87 65 79 90 90 65 76 90 90 69 82
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW SC B1 SC B1 B1 B1 B1 B1 B1 B1 B1 B2 B1 B1
POP 12HR 5 30 20 30 30 30 20 40
RAIN SHWRS SC IS IS SC SC SC IS IS SC SC
TSTMS SC IS IS SC 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
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