
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
801 PM EDT Sun Aug 9 2026
VAZ046-100800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
801 PM EDT Sun Aug 9 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 73 94 74 93 70
TEMP 77 74 73 74 86 93 93 86 80 78 75 76 87 93 91 82 76 73 71 73
DEWPT 70 69 68 70 71 70 69 69 69 69 68 70 72 71 71 71 71 70 69 70
MIN/MAX RH 87 46 82 49 94
RH 79 84 84 87 61 47 46 57 69 74 79 82 61 49 52 69 85 90 93 90
WIND DIR S SW SW W W W W SW W W W W W W W W W W W W
WIND SPD 4 3 3 3 5 8 9 5 5 5 5 4 5 8 8 5 4 4 4 4
CLOUDS SC SC SC SC SC FW SC FW SC SC SC SC B1 B1 B1 B1 B1 B1 SC SC
CLOUDS(%) 50 35 42 34 37 24 33 25 34 48 33 36 52 64 64 51 52 56 44 44
VSBY 10 10 8 10 10 10 10 10 10 10 10 10 10 6 6 7 7 10 10 10
POP 12HR 20 5 10 50 20
RAIN SHWRS SC SC IS IS
TSTMS SC SC IS
MIX HGT <1 <1 <1 <1 4 7 6 <1 <1 <1 <1 <1 4 5 5 <1
T WIND DIR SW SW SW SW SW W W SW W NW SW W N W W W
T WIND SPD 4 4 3 3 8 11 12 12 6 25 11 9 11 14 17 9
DISPERSION VP VP VP PR PR PR PR PR VP VP VP
ADI 3 2 2 3 42 87 88 6 3 17 5 9 49 64 94 6
MAX LVORI 4 5 6 6 1 1 1 3 3 3 4 4 1 1 1 3
STABILITY E G F A A B B F F E F A B C B E
CEILING None None None None None None None 9100 None
STA PRES 29.33 29.36 29.33 29.27 29.31 29.27 29.31 29.18
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 92 71 93 70 86 67 85 67 87
TEMP 91 84 74 72 91 86 75 72 85 79 71 68 83 78 70 69 85 80
DEWPT 72 71 70 70 72 70 69 68 70 70 68 66 68 68 67 67 71 70
RH 54 65 87 93 54 59 82 87 61 74 90 93 61 71 90 93 63 72
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 SC B1 B1 SC SC SC B1 B1 B1 B1 B1 SC SC B1 SC SC SC
POP 12HR 20 30 20 10 40 50 20 30 20
RAIN SHWRS IS SC IS SC SC IS IS IS SC IS IS
TSTMS IS IS IS 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