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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
132 AM EDT Sat Aug 16 2025
NCZ001-170800-
RAWS 310142
36.40N 81.46W Elev. 4608 ft
132 AM EDT Sat Aug 16 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 62 75 62 76 64
TEMP 64 63 63 69 72 70 66 65 64 63 63 70 74 72 68 66 65 64 64
DEWPT 62 61 61 63 63 64 63 63 61 61 60 61 61 63 62 62 61 61 62
MIN/MAX RH 96 73 95 65 93
RH 93 93 93 81 73 81 90 93 90 93 90 73 64 73 81 87 87 90 93
WIND DIR SE N NE E E E SE SE S SW W NW NW NW NW NW NW NW NW
WIND SPD 3 4 3 3 3 2 2 2 3 3 4 4 4 4 4 5 5 5 5
CLOUDS SC SC SC SC B1 B1 SC SC FW FW SC FW SC SC SC FW FW FW SC
CLOUDS(%) 28 42 37 37 66 57 38 32 19 23 26 20 38 33 27 19 18 19 28
VSBY 7 6 6 10 10 10 10 10 10 1 1 10 10 10 10 10 10 3
POP 12HR 20 20 5 10 5
RAIN SHWRS IS
TSTMS IS
MIX HGT <1 <1 <1 3 4 2 <1 <1 <1 <1 <1 3 4 3 <1
T WIND DIR E NW NW E N N E E SE SW W NW NW N N
T WIND SPD 1 2 1 2 5 4 5 1 1 2 2 8 4 8 6
DISPERSION VP VP VP VP VP VP VP PR PR PR
ADI 1 2 1 8 26 13 3 1 1 1 2 29 25 31 3
MAX LVORI 8 7 7 4 3 4 6 9 8 7 6 3 3 3 5
STABILITY G E A A B B G G G G A A A A F
CEILING None None None None None None None None
STA PRES 26.86 26.85 26.80 26.78 26.76 26.76 26.72
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 77 64 75 63 74 61 69 59 64
TEMP 73 68 65 64 72 66 64 63 70 64 63 61 64 61 61 59 61 59
DEWPT 63 64 63 62 64 64 62 62 64 63 61 60 61 58 57 58 59 58
RH 71 87 93 93 76 93 93 97 81 97 93 97 90 90 87 96 93 96
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC SC SC SC B1 SC B1 B1 B2 B1 B2 B2 B2 B2 B2 OV B2
POP 12HR 30 20 40 30 60 50 50 30 40
RAIN SHWRS SC IS IS SC SC IS SC NM SC SC SC SC SC IS SC SC
TSTMS SC IS IS SC SC IS SC IS 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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