
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
231 PM EDT Wed Aug 5 2026
NCZ006-060800-
RAWS 310801
36.37N 79.29W Elev. 580 ft
231 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 69 88 70 88 69
TEMP 83 78 74 73 71 72 81 86 86 80 75 74 73 73 82 87 88 82 76 73 71 73
DEWPT 75 75 72 72 71 72 76 75 74 74 72 72 72 73 76 75 74 74 72 72 71 72
MIN/MAX RH 100 67 100 63 100
RH 77 91 93 97100100 85 70 68 82 90 93 97100 82 68 63 77 87 97100 97
WIND DIR S S S S S SW SW SW S S S S SW SW SW SW SW SW S S SW SW
WIND SPD 5 2 1 1 2 3 5 6 5 3 1 1 2 3 5 6 6 2 1 2 2 3
CLOUDS B1 B1 SC FW SC B1 SC SC B1 SC SC SC B1 SC SC SC B1 B1 B1 FW SC SC
CLOUDS(%) 67 69 28 19 33 53 36 38 52 48 35 36 65 47 42 40 55 59 51 21 26 28
VSBY 10 10 10 9 7 8 10 10 10 10
POP 12HR 20 20 20 20 30
RAIN SHWRS SC IS IS IS IS IS IS SC SC
TSTMS SC IS IS IS IS IS SC IS
MIX HGT 3 <1 <1 <1 <1 1 3 4 3 <1 <1 <1 <1 1 3 5 4 <1
T WIND DIR S S S S S SW SW SW S S S SW SW SW SW SW SW SW
T WIND SPD 18 12 6 11 9 10 11 12 16 8 9 5 5 9 14 17 17 8
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 58 6 3 5 4 14 41 66 49 4 4 3 3 12 60100 83 4
MAX LVORI 3 5 6 7 9 5 4 1 1 5 6 6 9 5 3 1 1 4
STABILITY C F G G G B A B C F G G F A A B B F
CEILING 3000 None None None None None None None None None
STA PRES 29.46 29.50 29.52 29.55 29.51 29.55 29.57 29.58 29.51
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 88 70 90 69 92 71 93 71 91
TEMP 87 83 74 71 88 83 74 72 90 85 75 73 91 85 76 72 89 82
DEWPT 74 74 72 71 73 73 71 72 72 73 71 72 73 73 71 72 73 73
RH 65 74 93100 61 72 90100 56 67 87 97 56 67 85100 59 74
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC SC SC SC SC SC FW FW SC SC SC FW SC SC SC SC B1
POP 12HR 20 10 20 10 5 10 20 20 40
RAIN SHWRS IS IS IS IS SC
TSTMS IS 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