
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
801 AM EDT Wed Aug 5 2026
NCZ003-052000-
RAWS 310301
36.48N 80.86W Elev. 1300 ft
801 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 80 67 84 66 83
TEMP 74 77 77 73 70 69 69 70 76 81 80 75 71 69 67 70 78 82 79 75
DEWPT 71 71 71 72 70 69 68 69 71 71 71 71 71 69 67 70 74 74 75 74
MAX/MIN RH 78 100 69 100 78
RH 90 82 82 97100100 97 97 85 72 74 87100100100100 88 77 88 97
WIND DIR SE S S SE N N N N S S S S N N N N S S SW N
WIND SPD 2 4 4 1 0 0 0 0 3 5 4 1 0 0 0 0 2 4 3 0
CLOUDS B2 B1 B1 B1 SC SC B1 B1 SC B2 B2 B1 B1 SC SC B1 B1 OV OV B1
CLOUDS(%) 82 67 67 62 42 34 59 63 50 78 73 61 66 45 49 57 56 88 88 54
VSBY 10 10 10 10 10 8 6 6 10 10 10 10
POP 12HR 60 30 70 30 80
RAIN SHWRS SC SC SC IS NM NM SC SC SC SC O O
TSTMS SC SC IS SC SC SC IS SC SC
Obvis PF PF
MIX HGT 2 3 3 <1 <1 <1 <1 <1 2 4 3 <1 <1 <1 <1 <1 2 3 3 <1
T WIND DIR S S S S S S SW SW SW S S S SW SW SW W W S S S
T WIND SPD 3 9 12 11 8 4 3 3 9 12 12 10 4 4 3 4 4 8 16 11
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 8 29 37 5 4 2 2 4 27 47 38 5 2 2 2 5 12 24 53 5
MAX LVORI 8 4 4 9 9 9 10 9 4 3 4 7 9 9 10 9 5 3 4 7
STABILITY B C C F F G F B A C C F F F F B B C B F
CEILING 600 2200 None 1100 None 2300 4200 None 6100 3500
STA PRES 28.24 28.22 28.26 28.29 28.32 28.32 28.33 28.33 28.35 28.29
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 66 85 66 86 66 87 68 88
TEMP 69 70 83 78 69 69 83 79 70 70 84 80 71 71 85 80
DEWPT 69 70 74 74 69 69 73 74 69 69 73 74 70 70 73 74
RH 100100 74 88100100 72 85 97 97 70 82 97 97 67 82
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC SC B2 SC SC SC B1 SC FW SC SC SC FW SC SC
POP 12HR 10 80 20 30 5 20 10 20
RAIN SHWRS O IS IS SC IS IS
TSTMS SC IS SC IS IS
$$
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