
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 >
Print This Forecast (Printer-Friendly)
EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
131 PM EDT Tue Aug 4 2026
VAZ018-042000-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
131 PM 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 80 67 83 68 86
TEMP 79 78 71 70 70 69 69 75 80 80 73 71 70 68 70 80 85 81 73
DEWPT 70 71 69 68 68 68 68 72 72 73 71 69 68 68 68 72 72 72 71
MAX/MIN RH 74 100 76 98 65
RH 74 79 93 93 93 97 97 90 77 79 93 93 93100 93 77 65 74 93
WIND DIR E E E E E NE E SE S SE SE S S S SW SW S S S
WIND SPD 4 5 3 2 1 1 1 2 4 4 2 1 1 1 2 3 4 4 2
WIND GUST 13
CLOUDS B2 B1 B2 B2 OV B2 B2 B1 B2 B1 SC B1 B1 SC B1 SC B2 B2 B1
CLOUDS(%) 81 63 75 83 96 77 74 66 80 65 32 52 52 50 58 38 86 86 61
VSBY 7 6 6 6 2 1 1 7 10 10 10 10 10 10
POP 12HR 50 60 70 10 80
RAIN SHWRS SC SC SC NM SC SC IS IS NM SC O O IS
TSTMS SC SC IS IS IS SC SC SC SC IS
MIX HGT 3 3 <1 <1 <1 <1 <1 2 4 3 <1 <1 <1 <1 1 3 5 3 <1
T WIND DIR E E SE E SE E NE E S S S SW SW SW SW W SW S S
T WIND SPD 10 9 11 3 6 3 2 2 6 9 11 14 8 4 4 5 5 9 2
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 32 27 5 2 3 2 3 6 25 28 5 7 4 2 6 21 24 27 1
MAX LVORI 3 3 6 7 6 8 9 5 3 3 6 6 6 8 6 3 3 3 7
STABILITY C C F F F F B B C C G F F F B A C C F
CEILING 1600 300 0 500 2400 None None None 1500
STA PRES 27.83 27.85 27.86 27.88 27.86 27.89 27.91 27.96 27.94
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 86 67 86 67 86 68 88
TEMP 69 70 85 75 69 69 83 75 69 69 84 77 70 70 86 78
DEWPT 67 68 71 71 67 68 71 71 67 67 70 70 66 67 70 70
RH 93 93 63 87 93 97 67 87 93 93 63 79 87 90 59 76
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 SC SC B2 B1 SC SC B1 SC B1 SC B1 SC SC SC SC
POP 12HR 20 70 30 50 20 30 10 20
RAIN SHWRS IS IS NM SC SC IS SC IS
TSTMS IS IS SC SC 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