
Dangerous heat will persist across the Southwest U.S. through this week, easing by next week. The heat will focus further east in the Great Plains and Mississippi Valley beginning next week. Elevated to locally critical fire weather conditions will persist for the Great Basin today. Poor air quality lingers for the Northwest, Great Basin, Central Rockies into the Plains. Read More >
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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
301 PM EDT Tue Aug 4 2026
VAZ012-050800-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
301 PM EDT Tue Aug 4 2026
Date 08/04/26 Wed 08/05/26 Thu 08/06/26 Fri
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 63 80 63 82 62
TEMP 77 71 67 67 66 66 73 77 79 74 67 66 65 65 76 81 78 72 67 65 63 65
DEWPT 69 67 66 65 65 66 70 69 70 68 66 65 64 65 69 69 70 68 66 65 63 65
MIN/MAX RH 100 73 100 68 100
RH 76 87 97 93 97100 90 76 74 82 97 97 97100 79 67 76 87 97100100100
WIND DIR SE SE SE SE E SE SE S SW S S S S SW SW SW SW SW SW SW SW SW
WIND SPD 2 2 1 1 1 1 1 2 2 1 1 1 1 1 2 2 2 1 1 1 1 1
CLOUDS B1 B1 B2 B1 B2 B1 SC B2 B1 B1 FW SC B1 SC SC OV OV B1 B1 SC SC B1
CLOUDS(%) 68 64 80 63 81 59 41 73 68 53 22 48 59 40 40 91 91 52 53 40 49 60
VSBY 9 10 8 6 2 3 10 10 10 10 9 10 10
POP 12HR 40 60 10 90 20
RAIN SHWRS SC IS IS NM SC IS IS O O IS IS SC
TSTMS SC IS SC SC IS SC SC IS
Obvis PF PF PF PF
MIX HGT 3 <1 <1 <1 <1 <1 2 4 3 <1 <1 <1 <1 <1 3 4 3 <1
T WIND DIR E E SE SE SE S W S S S S S SW SW SW S SW W
T WIND SPD 8 9 8 4 3 5 4 5 9 11 6 8 6 6 5 6 12 10
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 34 4 4 2 2 6 15 26 30 5 3 4 3 7 23 32 41 5
MAX LVORI 3 6 8 8 10 8 4 3 3 5 8 8 9 8 3 3 3 6
STABILITY B F F F F B A B B F G F F A A B B F
CEILING 400 100 None 1800 None None None 4500 None
STA PRES 27.33 27.35 27.37 27.36 27.40 27.43 27.46 27.46
Date 08/07Sat 08/08/26Sun 08/09/26Mon 08/10/26Tue 08/11/26
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 81 62 82 63 83 63 86 65 85
TEMP 80 75 65 64 78 73 67 64 79 75 67 65 82 77 69 67 81 76
DEWPT 69 68 64 64 69 68 65 64 68 67 64 65 68 68 66 67 69 68
RH 69 79 97100 74 84 93100 69 76 90100 63 74 90100 67 76
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B2 SC SC B1 B2 B1 B1 B1 B1 FW FW SC SC SC SC SC B1
POP 12HR 80 20 80 20 30 10 20 10 40
RAIN SHWRS SC O IS SC O IS SC IS SC
TSTMS IS SC IS IS SC IS 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