
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
VAZ018-060800-
RAWS 444002
37.56N 80.18W Elev. 2702 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 68 85 68 85 66
TEMP 81 74 71 70 69 70 81 85 82 74 71 70 69 70 80 84 81 73 71 69 67 69
DEWPT 72 71 69 68 68 69 71 71 72 70 68 68 67 68 72 71 72 71 68 67 66 68
MIN/MAX RH 96 63 97 66 97
RH 74 90 93 93 97 97 72 63 72 87 90 93 93 93 77 65 74 93 90 93 97 97
WIND DIR S S SW SW W SW SW S W W SW SW W W SW SW SW SW SW SW W W
WIND SPD 4 2 1 1 2 2 2 4 3 2 1 1 1 1 2 3 3 2 2 2 2 2
CLOUDS B1 SC SC SC FW SC FW B1 B2 B1 B1 B1 SC SC SC B2 B2 B1 SC SC SC SC
CLOUDS(%) 64 38 49 29 21 34 23 69 82 64 61 58 32 45 38 82 82 55 43 38 32 31
VSBY 10 10 9 7 4 2 10 10 10 10
POP 12HR 10 70 40 70 20
RAIN SHWRS SC SC NM SC IS NM NM IS IS
TSTMS SC SC SC IS SC SC IS
Obvis PF PF
MIX HGT 3 <1 <1 <1 <1 <1 4 5 2 <1 <1 <1 <1 <1 3 5 3 <1
T WIND DIR S S S S SW SW W SW S S SW SW SW W W W W SW
T WIND SPD 10 10 5 5 8 6 6 9 11 16 8 8 4 5 9 10 8 8
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 33 5 3 3 4 7 33 37 32 7 4 4 2 6 36 63 26 4
MAX LVORI 3 6 6 6 6 6 3 1 3 5 6 6 6 7 3 1 3 6
STABILITY C G F G G A A C B F F F G A A B B F
CEILING 2100 None None None 3000 None None None 3000 None
STA PRES 27.88 27.91 27.94 27.97 27.94 27.96 27.98 28.00 27.95
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 85 67 86 67 88 69 88 69 84
TEMP 84 76 70 70 85 78 70 69 86 78 71 71 86 78 71 71 82 75
DEWPT 71 70 67 68 69 69 65 66 69 69 66 67 70 69 67 68 71 69
RH 65 82 90 93 59 74 84 90 57 74 84 87 59 74 87 90 69 82
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC B1 SC SC SC SC SC FW SC SC SC SC SC SC B1 B1 B1 B1
POP 12HR 50 20 10 5 10 20 20 30 50
RAIN SHWRS SC IS IS IS SC IS IS SC
TSTMS SC 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