
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
531 PM EDT Mon Aug 10 2026
NCZ003-110800-
RAWS 310301
36.48N 80.86W Elev. 1300 ft
531 PM EDT Mon Aug 10 2026
Date 08/10/26 Tue 08/11/26 Wed 08/12/26 Thu
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 70 89 70 89 69
TEMP 80 76 74 72 73 81 86 87 81 76 74 72 73 83 88 87 80 74 71 70 72
DEWPT 71 69 68 67 68 71 71 71 72 70 69 69 70 73 72 72 72 71 69 69 70
MIN/MAX RH 90 58 94 59 97
RH 74 79 82 84 84 72 61 59 74 82 84 90 90 72 59 61 77 90 93 97 93
WIND DIR W NW W NW W NW NW NW W NW NW W NW NW W W W W NW NW NW
WIND SPD 4 5 4 6 4 6 6 4 2 2 2 4 4 5 5 4 2 2 1 2 2
CLOUDS SC B1 SC B2 SC SC SC SC SC SC SC B1 B2 B1 SC SC SC SC SC SC B1
CLOUDS(%) 45 64 42 73 36 27 48 47 43 48 28 66 75 59 45 44 39 45 43 40 51
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 20 20 20 20 10
RAIN SHWRS IS IS IS IS IS
TSTMS IS IS IS IS IS
MIX HGT <1 <1 <1 <1 <1 3 5 3 <1 <1 <1 <1 <1 2 4 4 <1
T WIND DIR SW NW N NW NW NW W NW W W W NW W NW W NW SW
T WIND SPD 4 3 17 8 21 12 9 13 2 3 3 9 4 14 14 5 1
DISPERSION VP PR VP PR VP VP VP VP VP VP VP VP
ADI 2 2 12 5 21 49 51 52 1 2 2 6 5 39 78 28 1
MAX LVORI 3 4 4 5 4 3 1 1 3 5 5 5 6 3 1 2 4
STABILITY G E E E A B B A F F G E B C A A G
CEILING None None None None None 6200 6600 None None
STA PRES 28.20 28.17 28.17 28.10 28.10 28.08 28.07 28.02
Date 08/13Fri 08/14/26Sat 08/15/26Sun 08/16/26Mon 08/17/26
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 89 71 89 70 85 69 89 70 90
TEMP 87 84 73 73 87 82 73 72 83 79 72 71 86 82 73 72 87 82
DEWPT 73 74 71 71 74 74 71 70 73 73 70 70 73 73 70 70 72 72
RH 63 72 93 93 65 77 93 93 72 82 93 97 65 74 90 93 61 72
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC B1 B1 SC SC B1 B1 B1 B1 B1 SC SC B1 B1 SC SC SC B1
POP 12HR 10 5 30 20 50 20 30 10 30
RAIN SHWRS SC IS IS IS SC IS SC SC
TSTMS SC IS IS SC IS SC 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