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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1131 PM EDT Fri Aug 15 2025
NCZ019-160800-
RAWS 312001
36.23N 81.32W Elev. 2380 ft
1131 PM EDT Fri Aug 15 2025
Date 08/15/25 Sat 08/16/25 Sun 08/17/25 Mon
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 67 84 67 86 69
TEMP 70 68 69 77 81 80 75 71 69 67 68 79 84 82 77 73 70 69 70
DEWPT 67 65 66 70 69 69 69 68 67 65 66 68 67 68 69 67 66 65 67
MIN/MAX RH 99 67 95 57 91
RH 90 90 90 79 67 69 82 90 93 93 93 69 57 63 76 81 87 87 90
WIND DIR N N N E SE E NE NW NW NW NW NW N N NW NW NW NW NW
WIND SPD 1 2 1 2 2 2 1 1 1 1 1 1 2 2 1 2 2 2 2
CLOUDS SC SC SC SC SC SC SC FW FW FW FW FW SC SC SC FW FW FW FW
CLOUDS(%) 28 44 30 42 38 41 35 23 21 24 18 18 30 35 27 18 16 13 11
VSBY 8 9 9 10 10 10 10 10 10 3 4 10 10 10 10 10 10 7
POP 12HR 20 20 5 10 5
RAIN SHWRS IS IS
TSTMS IS IS
MIX HGT <1 <1 <1 3 5 3 <1 <1 <1 <1 <1 3 5 3 <1
T WIND DIR N NW NW NE N NE E NE SE SW W W NW W NW
T WIND SPD 2 3 3 3 4 2 4 2 1 2 2 3 3 4 2
DISPERSION VP VP VP VP VP VP VP VP VP VP
ADI 1 2 3 11 27 10 2 1 1 1 2 12 21 18 1
MAX LVORI 7 7 6 4 3 3 5 7 8 7 6 3 2 2 4
STABILITY G F A A A A G G G G A A A A G
CEILING None None None None None None None None
STA PRES 28.05 28.04 27.98 27.97 27.95 27.94 27.90
Date 08/18Tue 08/19/25Wed 08/20/25Thu 08/21/25Fri 08/22/25
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 68 83 67 81 65 77 64 71
TEMP 84 76 71 70 81 73 69 68 78 72 67 66 74 69 66 64 70 67
DEWPT 68 69 67 67 70 70 67 67 68 68 66 65 64 64 62 62 65 64
RH 59 79 87 90 69 90 93 97 71 87 97 97 71 84 87 93 84 90
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B2 B2 B2 B2 B2 B2
POP 12HR 30 20 40 30 60 50 50 40 50
RAIN SHWRS SC IS IS SC SC IS IS NM SC SC SC SC SC IS SC SC
TSTMS SC IS IS SC SC SC IS SC 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
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