
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
401 AM EDT Wed Aug 5 2026
VAZ012-052000-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
401 AM EDT Wed Aug 5 2026
Date Wed 08/05/26 Thu 08/06/26 Fri 08/07/26
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 79 62 83 62 82
TEMP 66 67 74 78 76 70 66 65 64 65 77 82 79 72 67 65 63 65 76 81 78 71
DEWPT 64 65 67 67 67 66 66 65 64 65 67 66 68 67 66 65 63 65 70 70 70 68
MAX/MIN RH 70 100 60 100 68
RH 93 93 79 69 74 87100100100100 71 58 69 84 97100100100 82 69 76 90
WIND DIR E SE SE S S S S SW SW SW SW S SW SW S SW SW SW SW SW SW SW
WIND SPD 1 1 1 2 2 1 1 1 1 1 2 2 2 1 1 1 1 1 1 2 2 1
CLOUDS B2 B2 B1 B1 B2 B1 SC SC SC SC FW B2 B2 SC B1 SC B1 B1 B1 B2 B2 SC
CLOUDS(%) 80 70 55 67 76 55 42 34 35 32 20 73 74 44 51 46 53 59 54 85 85 35
VSBY 4 4 10 10 10 10 9 5 6 6 10 10
POP 12HR 60 10 80 20 80
RAIN SHWRS IS SC NM NM NM IS IS SC SC O O
TSTMS SC SC SC SC IS IS SC SC
Obvis PF PF PF
MIX HGT <1 <1 2 4 3 <1 <1 <1 <1 <1 3 4 2 <1 <1 <1 <1 <1 2 3 2 <1
T WIND DIR S S SW S S S S S S S SW S S S S S SW W W S S E
T WIND SPD 4 4 4 5 10 9 6 5 4 3 6 8 13 9 5 4 6 9 8 5 4 3
DISPERSION VP VP VP VP VP VP VP VP VP VP
ADI 2 6 14 26 37 4 3 3 2 3 26 39 42 4 3 2 3 10 24 21 12 2
MAX LVORI 9 7 4 3 3 6 9 9 9 9 3 3 3 6 8 9 9 8 3 3 4 7
STABILITY F B B B B F F G G A A B B F F F F B B B B G
CEILING 200 2600 None None None 2700 None None 1600 2200
STA PRES 27.37 27.35 27.40 27.42 27.45 27.43 27.45 27.47 27.49 27.43
Date Sat 08/08/26Sun 08/09/26Mon 08/10/26Tue 08/11/26
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 62 83 63 84 63 86 65 85
TEMP 65 65 81 74 66 65 80 75 67 65 82 77 69 67 81 76
DEWPT 65 65 69 68 66 65 68 68 65 65 69 68 66 67 70 68
RH 100100 67 82100100 67 79 93100 65 74 90100 69 76
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC SC B2 B1 SC B1 SC SC SC SC SC SC SC SC B1
POP 12HR 10 80 20 20 10 20 10 30
RAIN SHWRS IS O IS IS IS SC
TSTMS IS SC IS IS 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