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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
731 PM EDT Sat Aug 22 2026
VAZ046-230800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
731 PM EDT Sat Aug 22 2026
Date 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue
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 65 86 60 86 58
TEMP 75 69 68 66 67 78 84 84 74 67 63 60 62 78 83 85 76 66 61 59 60
DEWPT 69 68 67 65 65 64 60 56 56 54 54 54 56 58 57 55 54 52 52 52 54
MIN/MAX RH 99 38 81 35 81
RH 82 97 97 97 93 62 44 38 53 63 72 81 81 50 41 36 46 61 72 78 81
WIND DIR S SW SW W W NW NW W W NW W W W W W W NW N N N NW
WIND SPD 3 3 4 5 6 9 9 9 5 4 2 2 3 6 8 6 4 3 3 3 3
CLOUDS B1 SC FW FW CL CL CL CL CL CL CL CL FW CL FW FW FW FW FW FW FW
CLOUDS(%) 60 43 12 21 2 2 3 5 3 1 1 0 6 1 8 13 16 10 19 24 20
VSBY 10 7 6 4 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 40 0 0 0 0
RAIN SHWRS SC IS
TSTMS IS IS
MIX HGT <1 <1 <1 <1 <1 4 7 7 <1 <1 <1 <1 <1 5 7 8 <1
T WIND DIR S S S SW W NW NW W W NW NW W W W W W W
T WIND SPD 6 2 3 5 12 14 13 13 4 5 3 2 2 14 11 10 2
DISPERSION VP VP VP PR PR VP VP VP VP VP VP VP
ADI 3 1 2 3 13 67101104 2 3 2 1 2 88 84 82 1
MAX LVORI 5 8 10 8 5 1 1 1 2 3 3 4 5 1 1 1 2
STABILITY F F F F B B B B F F G G A B B B F
CEILING None None None None None None None None None
STA PRES 29.22 29.18 29.25 29.24 29.31 29.34 29.34 29.32
Date 08/25Wed 08/26/26Thu 08/27/26Fri 08/28/26Sat 08/29/26
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 86 62 89 66 87 66 88 67 88
TEMP 83 75 63 63 86 79 68 69 84 77 68 69 85 79 69 69 86 79
DEWPT 56 57 57 59 66 65 66 68 71 70 68 69 71 70 68 68 70 69
RH 40 54 81 87 51 62 93 97 65 79100100 63 74 97 97 59 72
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW FW FW SC B1 B1 B1 B2 B1 B1 SC SC SC SC SC SC
POP 12HR 0 5 20 30 60 40 20 20 20
RAIN SHWRS IS SC IS SC NM SC IS IS IS IS IS
TSTMS SC 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
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