
A frontal boundary will bring scattered showers and storms to portions of the Central and Eastern U.S. through the end of the week. Meanwhile, dangerous heat will intensify across the Intermountain West and expand into the Central U.S. by early next week. Elevated wildfire conditions will develop across portions of the Northern/Central Plains and air quality issues will persist in the Northwest. Read More >
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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
901 PM EDT Wed Aug 5 2026
NCZ001-060800-
RAWS 310142
36.40N 81.46W Elev. 4608 ft
901 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 62 72 62 72 61
TEMP 64 64 63 63 68 70 68 64 64 64 63 63 68 71 68 64 63 63 62 62
DEWPT 63 63 62 63 63 65 66 64 63 63 62 62 64 65 66 64 63 62 61 62
MIN/MAX RH 99 83 100 82 100
RH 97 97 97100 84 84 93100 97 97 97 97 87 81 93100100 97 97100
WIND DIR S S SW SW S SW S SW S S SW W SW S SW S SW SW W W
WIND SPD 5 5 5 4 4 5 4 4 4 5 5 4 3 4 4 3 5 5 5 6
CLOUDS SC SC SC SC SC B2 OV B2 B2 SC SC B1 B1 OV OV B1 B1 SC SC SC
CLOUDS(%) 45 38 44 46 28 87 89 74 82 44 41 57 57 91 91 64 52 32 30 34
VSBY 9 6 3 2 10 9 10 10 10 5 1
POP 12HR 20 80 30 90 20
RAIN SHWRS IS O O SC SC SC O O IS IS IS
TSTMS IS NM NM IS IS SC SC IS
Obvis PF PF PF
MIX HGT <1 <1 <1 <1 3 2 2 <1 <1 <1 <1 <1 3 3 2 <1
T WIND DIR S S S SW SW S S S S S SW W W SW SW S
T WIND SPD 4 5 8 5 6 10 16 13 9 9 8 2 10 6 8 8
DISPERSION PR PR PR VP VP PR PR VP PR PR PR
ADI 3 3 5 6 25 29 33 9 6 6 5 2 36 22 19 4
MAX LVORI 8 8 7 9 4 4 4 8 6 6 7 10 4 3 5 9
STABILITY E F E A A C C E E E E C B C C F
CEILING None None 700 700 None 1100 700 None
STA PRES 26.87 26.91 26.89 26.91 26.92 26.95 26.91
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 73 62 75 62 76 63 76 64 74
TEMP 72 67 64 62 72 68 63 63 74 69 65 64 73 69 65 64 71 67
DEWPT 65 64 62 62 64 64 61 61 63 64 62 62 64 64 63 63 65 64
RH 79 90 93100 76 87 93 93 69 84 90 93 73 84 93 97 81 90
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC OV B1 SC SC B1 SC FW SC SC SC FW SC B1 SC SC B1 B1
POP 12HR 80 20 50 5 20 5 30 20 50
RAIN SHWRS IS O IS IS SC IS IS SC IS IS SC
TSTMS IS SC IS IS SC IS IS SC 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