
A series of fronts will focus locally heavy showers and storms across portions of the central and eastern U.S. through the end of the workweek. Dangerous to extreme heat continues across the Southwest U.S., eventually spreading eastward over the weekend into early next week. Elevated fire weather conditions continue across the Great Basin, with degraded air quality lingering across the Northwest. Read More >
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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
431 PM EDT Wed Aug 5 2026
VAZ012-060800-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
431 PM EDT Wed Aug 5 2026
Date 08/05/26 Thu 08/06/26 Fri 08/07/26 Sat
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 63 83 62 83 61
TEMP 81 74 67 66 64 65 77 80 78 72 67 66 64 65 76 81 78 72 67 65 63 65
DEWPT 69 68 66 65 64 65 69 68 70 68 66 65 64 65 70 69 69 68 66 64 63 65
MIN/MAX RH 100 65 100 66 100
RH 67 82 97 97100100 76 67 76 87 97 97100100 82 67 74 87 97 97100100
WIND DIR S SW SW SW SW SW SW SW SW S S N SW W SW SW SW SW SW SW SW W
WIND SPD 2 1 1 1 1 1 1 2 2 1 1 0 1 1 1 2 2 1 1 1 2 2
CLOUDS B2 SC SC SC SC SC FW B2 B2 B1 B2 B1 B1 SC SC B2 B2 SC SC SC SC SC
CLOUDS(%) 71 48 32 36 47 44 20 82 73 68 71 57 51 40 45 78 78 45 41 33 41 36
VSBY 10 10 8 6 2 2 10 10 10 10
POP 12HR 10 70 30 70 20
RAIN SHWRS NM NM NM SC NM NM IS IS IS
TSTMS SC SC SC IS SC SC IS
Obvis PF PF PF
MIX HGT 3 <1 <1 <1 <1 <1 3 4 2 <1 <1 <1 <1 <1 3 4 3 <1
T WIND DIR S S S S S SW W SW S S S S SW SW W W SW SW
T WIND SPD 10 11 4 4 5 5 8 8 12 8 5 3 3 5 12 10 12 6
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 44 5 2 2 3 6 32 36 39 4 3 2 2 6 50 54 46 3
MAX LVORI 1 4 8 8 9 9 3 3 3 6 8 8 10 9 3 1 3 6
STABILITY B F G G F A A B B F F F F A A B B F
CEILING None None None 2700 2200 None None 4800 None
STA PRES 27.38 27.41 27.44 27.42 27.44 27.46 27.48 27.45
Date 08/08Sun 08/09/26Mon 08/10/26Tue 08/11/26Wed 08/12/26
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 82 63 84 62 86 65 86 65 82
TEMP 81 74 65 66 80 75 66 65 82 77 67 66 81 76 67 67 78 73
DEWPT 69 68 65 66 67 67 64 65 67 67 65 66 69 68 66 67 69 68
RH 67 82100100 65 76 93100 61 71 93100 67 76 97100 74 84
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC B2 SC B1 B1 SC FW FW SC SC SC SC SC B1 B1 B1 B2 B2
POP 12HR 70 20 20 5 20 10 30 40 60
RAIN SHWRS IS NM IS IS IS IS IS SC SC IS SC NM
TSTMS IS SC IS 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