
Scattered showers and storms are expected across portions of the Central and Eastern U.S. through the end of the week. Meanwhile, dangerous heat will intensify across the Desert Southwest and Intermountain West. Hot, dry weather and increasing winds will allow elevated wildfire conditions to return to the northern Intermountain West, where air quality issues persist from ongoing fires. Read More >
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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Fri Aug 7 2026
NCZ006-072000-
RAWS 310801
36.37N 79.29W Elev. 580 ft
801 AM EDT Fri Aug 7 2026
Date Fri 08/07/26 Sat 08/08/26 Sun 08/09/26
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 89 71 90 72 91
TEMP 83 88 88 83 77 76 74 74 83 88 88 82 77 74 72 74 84 90 89 83
DEWPT 74 74 73 74 72 72 72 73 74 74 73 74 72 72 71 72 74 73 72 74
MAX/MIN RH 61 97 61 99 57
RH 74 63 61 74 85 87 93 97 74 63 61 77 85 93 97 93 72 58 57 74
WIND DIR SW SW S S SW SW SW SW SW SW SW SW SW SW SW SW W SW SW SW
WIND SPD 5 6 6 3 1 2 3 4 5 6 6 2 1 1 2 2 3 3 4 2
CLOUDS SC SC SC SC SC FW SC SC SC B1 B1 SC SC FW SC FW SC SC SC B1
CLOUDS(%) 49 49 41 49 36 23 37 34 44 51 55 42 42 20 26 21 34 36 40 52
VSBY 10 10 10 7 10 10 10 10 10 7 7 10 10 10 10 10 10 10 10 10
POP 12HR 10 20 30 10 10
RAIN SHWRS IS IS SC
TSTMS IS IS SC
MIX HGT 3 5 4 <1 <1 <1 <1 <1 4 6 4 <1 <1 <1 <1 <1 3 6 7 <1
T WIND DIR SW SW SW SW SW SW SW SW W SW SW SW SW W SW SW W SW SW SW
T WIND SPD 10 14 14 14 5 6 6 13 13 12 14 9 11 6 4 9 10 6 12 5
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 37 82 73 7 3 3 3 17 62 56 77 4 5 3 2 10 39 50102 3
MAX LVORI 3 1 1 3 5 6 6 5 3 1 1 4 5 6 8 6 3 1 1 3
STABILITY A B B F G G G A A C B F F G G A A A A F
CEILING None None None None None None None None None None
STA PRES 29.57 29.49 29.49 29.49 29.5 29.43 29.44 29.44 29.46 29.41
Date Mon 08/10/26Tue 08/11/26Wed 08/12/26Thu 08/13/26
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 72 93 73 95 72 94 71 92
TEMP 74 74 91 87 76 74 93 87 76 74 91 85 75 73 90 84
DEWPT 71 72 72 72 71 72 71 72 71 71 72 73 71 71 72 73
RH 90 93 54 61 85 93 49 61 85 90 54 67 87 93 56 70
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC SC SC SC FW FW FW SC FW FW SC B1 SC SC B1
POP 12HR 5 5 5 5 10 30 30 30
RAIN SHWRS SC SC SC
TSTMS SC 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