
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
801 AM EDT Tue Aug 4 2026
NCZ003-042000-
RAWS 310301
36.48N 80.86W Elev. 1300 ft
801 AM EDT Tue Aug 4 2026
Date Tue 08/04/26 Wed 08/05/26 Thu 08/06/26
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 79 67 81 67 83
TEMP 75 78 75 73 70 70 69 69 74 78 78 75 71 69 68 70 78 82 79 76
DEWPT 72 73 74 72 70 70 69 69 74 74 75 74 71 69 68 70 74 74 75 73
MAX/MIN RH 85 100 85 100 78
RH 90 85 97 97100100100100100 88 91 97100100100100 88 77 88 90
WIND DIR E E E E N N N N SE S S S N N N N S S S SW
WIND SPD 4 4 3 1 0 0 0 0 2 4 4 1 0 0 0 0 3 6 5 1
CLOUDS B2 B1 B2 B2 B2 B2 B1 B2 B1 B2 B2 B1 B1 B1 B1 B1 SC OV OV SC
CLOUDS(%) 82 69 73 83 78 82 58 72 58 73 71 57 58 68 69 62 46 89 89 48
VSBY 10 6 6 6 6 6 3 3 10 10 10 7 7 10 10
POP 12HR 50 50 70 40 80
RAIN SHWRS SC SC SC SC IS IS NM NM SC SC O O IS
TSTMS SC SC SC SC SC IS SC SC IS
MIX HGT 2 3 2 <1 <1 <1 <1 1 2 3 3 <1 <1 <1 <1 <1 2 3 2 <1
T WIND DIR E E E SE SE SE SW SW S S S S S S S S SW SW S SW
T WIND SPD 8 8 9 5 1 2 2 2 5 10 12 12 11 8 6 9 6 9 11 9
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 22 29 25 3 1 1 1 3 12 32 38 6 5 4 3 10 18 30 26 4
MAX LVORI 4 4 5 8 10 10 10 9 5 4 4 7 9 9 9 8 4 3 4 6
STABILITY C B B F F F F B B C C F F F F B A C C F
CEILING 1000 9300 1600 600 1100 2900 2200 900 None 1900
STA PRES 28.15 28.14 28.17 28.18 28.21 28.20 28.23 28.26 28.30 28.30
Date Fri 08/07/26Sat 08/08/26Sun 08/09/26Mon 08/10/26
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 67 84 66 84 66 85 67 87
TEMP 69 70 82 77 69 69 82 78 68 69 83 79 69 70 84 80
DEWPT 69 70 74 74 69 69 74 74 68 69 73 74 69 69 73 74
RH 100100 77 90100100 77 88100100 72 85100 97 70 82
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 SC B1 B2 B1 SC SC B2 SC SC SC B1 SC SC SC B1
POP 12HR 20 60 20 70 20 50 20 30
RAIN SHWRS IS IS NM IS NM IS SC IS SC
TSTMS IS IS SC 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