
Severe thunderstorm and heavy rainfall are possible in the Midwest into the Central Appalachians and the Desert Southwest early this week. Storms are also expected in parts of the northern Plains today. Fire weather and air quality concerns will persist across portions of the West. Mid-summer heat will continue across much of the CONUS this week, especially in the the south-central High Plains. Read More >
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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Mon Aug 10 2026
VAZ012-102000-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
801 AM EDT Mon Aug 10 2026
Date Mon 08/10/26 Tue 08/11/26 Wed 08/12/26
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 87 67 87 66 85
TEMP 76 82 84 76 71 70 68 69 77 81 82 75 70 69 68 68 75 80 80 74
DEWPT 68 67 67 67 67 66 66 67 70 69 69 68 67 66 66 67 69 69 69 68
MAX/MIN RH 57 96 65 99 67
RH 76 61 57 74 87 87 93 93 79 67 65 79 90 90 93 97 82 69 69 82
WIND DIR W W NW W W W W W W W W W W W W W W W W W
WIND SPD 4 4 4 4 4 4 5 5 5 5 4 4 4 4 4 5 5 5 4 5
CLOUDS B1 B1 B1 SC SC B1 B1 B1 B1 B2 SC B1 B1 B1 B1 B2 B1 B1 B1 B1
CLOUDS(%) 54 51 57 36 48 53 62 58 58 70 50 62 62 59 60 75 57 61 61 59
VSBY 10 10 10 10 10 10 10 10 10 10 6 10 10 10 10 10 10 10 10 10
POP 12HR 20 20 40 40 40
RAIN SHWRS IS SC SC SC SC SC IS IS SC SC SC
TSTMS IS SC SC SC IS SC SC SC
MIX HGT 3 4 4 <1 <1 <1 <1 1 3 4 3 <1 <1 <1 <1 1 2 4 3 <1
T WIND DIR W NW W W W W W N SW W N SW W SW SW SW SW W W SW
T WIND SPD 8 8 11 10 8 8 5 9 2 20 13 6 4 2 3 4 13 16 14 8
DISPERSION VP VP VP PR VP VP VP VP PR
ADI 26 32 42 5 5 5 4 12 7 77 54 5 3 2 2 7 39 62 47 5
MAX LVORI 3 1 1 3 5 6 6 5 4 1 1 4 6 7 8 8 3 1 1 4
STABILITY C C C F E E E C C C A E E E E C C C C E
CEILING None None None 1300 200 None 100 100 1500 2400
STA PRES 27.41 27.35 27.37 27.35 27.35 27.33 27.29 27.26 27.23 27.18
Date Thu 08/13/26Fri 08/14/26Sat 08/15/26Sun 08/16/26
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 66 85 67 84 64 83 64 85
TEMP 69 68 80 76 69 68 79 75 67 66 79 75 67 66 81 76
DEWPT 67 67 69 69 68 68 71 69 66 66 69 68 65 66 69 68
RH 93 97 69 79 97100 77 82 97100 72 79 93100 67 76
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B1 B2 B1 B1 B1 B2 B2 B1 B1 B2 B2 SC SC B1 B1
POP 12HR 40 50 20 60 30 60 20 40
RAIN SHWRS SC IS SC IS IS SC NM SC IS SC NM IS IS IS SC
TSTMS SC IS SC IS IS IS SC 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