
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
VAZ024-052000-
RAWS 441631
37.63N 79.51W Elev. 865 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 86 68 91 68 90
TEMP 71 73 79 85 85 79 72 71 70 71 83 90 88 80 74 71 69 71 84 90 87 79
DEWPT 70 70 71 72 71 71 70 70 69 70 70 70 71 71 72 71 69 71 73 72 74 73
MAX/MIN RH 62 100 53 100 57
RH 97 90 77 65 63 77 93 97 97 97 65 52 57 74 93100100100 70 56 65 82
WIND DIR N N SE S S S S S S SW SW S S S N N N N SW SW SW SW
WIND SPD 0 0 2 4 5 2 1 1 1 1 3 5 5 2 0 0 0 0 2 4 4 1
CLOUDS B1 B1 B2 B1 B1 SC SC SC SC FW SC B1 B2 SC SC SC SC SC SC B2 B2 B1
CLOUDS(%) 66 64 72 69 59 50 49 26 26 25 27 69 72 46 44 43 44 47 34 76 76 55
VSBY 2 3 10 10 10 9 8 5 7 8 10 10
POP 12HR 40 20 60 20 60
RAIN SHWRS SC IS IS SC SC IS IS SC NM IS IS NM NM IS
TSTMS IS SC SC IS SC SC IS SC SC IS
Obvis PF PF PF
MIX HGT <1 <1 2 3 3 <1 <1 <1 <1 <1 3 5 4 <1 <1 <1 <1 <1 3 5 2 <1
T WIND DIR SE S S S S S S S SW SW SW SW S SW SW S SW W W W W N
T WIND SPD 2 3 5 10 14 10 9 8 5 5 6 10 16 10 4 4 3 5 11 8 2 0
DISPERSION VP VP VP VP VP VP VP VP VP VP
ADI 1 4 16 34 50 5 4 4 3 7 26 43 57 5 2 2 2 6 38 43 7 0
MAX LVORI 10 7 3 3 1 4 9 9 9 8 3 1 1 4 8 9 10 9 3 1 3 6
STABILITY F B B C C F F G G A A C C F F F F A A B C F
CEILING 400 3100 None None None 3500 None None None 6800
STA PRES 28.61 28.58 28.64 28.66 28.68 28.66 28.68 28.69 28.72 28.68
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 67 91 67 92 67 94 69 93
TEMP 70 70 90 81 70 70 90 84 72 71 92 84 73 72 91 84
DEWPT 70 70 72 73 70 70 71 71 69 69 70 71 70 70 71 71
RH 100100 56 77100100 54 65 90 93 49 65 90 93 52 65
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC SC B2 SC SC SC SC SC FW SC SC FW SC SC SC
POP 12HR 20 60 20 10 0 10 5 20
RAIN SHWRS IS NM IS IS
TSTMS 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