
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 310302
36.35N 80.48W Elev. 1076 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 68 81 68 83
TEMP 73 76 76 72 70 70 69 70 74 79 79 75 71 70 69 70 77 82 80 76
DEWPT 70 72 72 71 70 70 69 70 73 74 73 72 71 70 69 70 73 74 73 72
MAX/MIN RH 85 100 81 100 76
RH 90 87 87 97100100100100 97 85 82 90100100100100 87 77 79 87
WIND DIR NE E NE E E NE NE E S S S S S S SW S SW S S SW
WIND SPD 6 5 4 4 3 3 2 2 3 4 4 2 2 2 3 3 5 6 6 4
CLOUDS B2 B2 B2 B2 B2 B1 B1 B2 B1 B1 B2 B1 B1 B1 B1 B1 SC B2 B2 B1
CLOUDS(%) 72 74 76 81 77 64 57 74 69 62 71 67 67 64 68 59 46 80 80 51
VSBY 10 6 6 6 6 7 4 4 10 10 10 4 4 10 10
POP 12HR 60 50 60 50 70
RAIN SHWRS IS SC NM SC SC IS SC NM SC SC NM NM IS
TSTMS IS SC NM 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 4 2 <1
T WIND DIR NE NE E E E E NW W S SW S S S S S S SW SW SW SW
T WIND SPD 10 8 8 3 3 2 2 2 4 10 12 12 10 8 8 8 9 11 12 10
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 26 24 20 2 2 1 1 2 12 34 36 6 5 4 4 8 26 43 25 7
MAX LVORI 4 4 4 8 10 10 10 9 5 4 4 6 9 9 9 8 4 3 3 5
STABILITY C C C E F F F B B C C F F F F B A C C E
CEILING 500 5900 800 500 3500 2100 2100 600 None 3900
STA PRES 28.97 28.95 28.98 29.00 29.03 29.01 29.05 29.08 29.13 29.12
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 68 83 68 84 68 85 68 86
TEMP 70 70 82 77 70 70 82 78 70 70 83 79 70 70 84 80
DEWPT 70 70 74 72 70 70 73 72 70 70 73 72 70 70 72 72
RH 100100 77 85100100 74 82100100 72 79100100 67 77
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B1 B1 B1 B1 SC SC B1 SC SC SC B1 SC SC SC SC
POP 12HR 20 50 20 50 20 30 10 20
RAIN SHWRS IS SC IS SC IS SC IS
TSTMS IS SC IS SC IS SC IS
$$
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