
Severe thunderstorm and heavy rainfall threats will persist from the Midwest to Lower Great Lakes through Monday, shifting into the Ohio Valley and Central Appalachians Monday evening into Tuesday. Mid-summer heat will continue across much of the CONUS this week, with record highs possible well into the 100s across the south-central High Plains. Read More >
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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 AM EDT Mon Aug 10 2026
VAZ024-110800-
RAWS 441631
37.63N 79.51W Elev. 865 ft
231 AM EDT Mon Aug 10 2026
Date 08/09/26 Mon 08/10/26 Tue 08/11/26 Wed
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 69 95 72 94 70
TEMP 70 73 87 92 93 85 78 75 73 75 86 91 91 83 76 73 72 73
DEWPT 67 68 70 68 67 68 69 68 68 69 70 69 69 70 70 69 68 69
MIN/MAX RH 91 43 85 48 90
RH 90 84 57 46 43 57 74 79 84 82 59 49 49 65 82 87 87 87
WIND DIR SW W W W W W W W W W W W W W W W W W
WIND SPD 1 1 3 5 5 3 3 3 3 3 5 6 6 4 2 2 3 3
CLOUDS SC SC SC SC SC SC SC SC B1 B1 B1 B1 SC B1 B1 B1 B1 B1
CLOUDS(%) 44 36 30 39 32 31 40 46 52 55 59 55 44 62 62 64 53 60
VSBY 5 6 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 5 10 10 30 40
RAIN SHWRS SC IS SC SC IS IS
TSTMS SC IS SC SC
MIX HGT <1 <1 3 6 5 <1 <1 <1 <1 <1 4 6 5 <1 <1 <1 <1 1
T WIND DIR NW NW W W SW W W NW NW W NW NW W W W NW W NW
T WIND SPD 2 3 4 8 12 6 6 11 9 23 11 20 8 4 3 3 3 2
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 1 3 20 61 79 3 3 5 4 24 54 90 44 3 2 2 2 3
MAX LVORI 6 5 2 1 1 3 3 4 5 3 1 1 1 3 5 6 6 6
STABILITY F A A A A G G F F B B C B E F F F B
CEILING None None None None None None None 17100 7100
STA PRES 28.59 28.61 28.53 28.54 28.56 28.54 28.49 28.50 28.46
Date 08/12Thu 08/13/26Fri 08/14/26Sat 08/15/26Sun 08/16/26
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 93 70 94 71 88 67 88 67 91
TEMP 90 82 73 73 91 86 74 72 86 80 71 69 86 80 70 69 89 82
DEWPT 69 70 69 70 68 71 71 70 71 70 69 66 68 68 67 67 70 70
RH 50 67 87 90 47 61 90 93 61 72 93 90 55 67 90 93 54 67
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B1 B1 B1 SC B1 B1 B1 B1 B2 B1 B1 B1 B1 B1 B1 SC SC
POP 12HR 30 30 20 20 50 30 30 30 20
RAIN SHWRS SC SC IS IS SC SC SC IS SC SC IS
TSTMS SC SC IS IS SC IS 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