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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1131 PM EDT Fri Aug 15 2025
NCZ005-160800-
RAWS 310540
36.38N 79.70W Elev. 858 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 71 87 68 90 71
TEMP 72 71 72 80 86 85 79 73 71 69 71 82 88 88 81 76 73 72 74
DEWPT 72 71 72 73 73 71 71 70 70 69 70 72 71 70 72 71 70 70 71
MIN/MAX RH 100 64 100 54 92
RH 100100100 79 65 63 77 90 97100 97 72 57 55 74 85 90 93 90
WIND DIR N N NE NE NE NE E E E E NW W N N S SW W NW N
WIND SPD 2 2 3 5 5 4 2 1 1 1 1 2 2 2 2 2 2 2 2
CLOUDS FW SC SC SC SC SC SC FW FW FW SC FW FW FW SC SC FW FW FW
CLOUDS(%) 22 41 36 49 38 35 26 16 17 19 30 16 16 23 31 26 19 24 23
VSBY 9 9 9 10 10 10 10 10 10 7 10 10 10 10 10 10 10 10
POP 12HR 10 10 5 10 5
Obvis PF PF
MIX HGT <1 <1 <1 2 4 4 <1 <1 <1 <1 <1 3 6 5 <1
T WIND DIR NE N E NE NE NE E E E S S W W N SE
T WIND SPD 2 3 9 12 9 8 9 2 2 2 1 4 3 0 2
DISPERSION VP VP VP VP VP VP VP VP VP VP
ADI 1 2 9 40 44 40 4 1 1 1 1 15 23 0 1
MAX LVORI 10 10 8 3 1 3 4 7 8 10 8 3 2 3 3
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 29.37 29.36 29.30 29.30 29.28 29.27 29.20
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 89 70 85 68 84 68 81 65 77
TEMP 87 80 72 72 83 77 70 70 82 75 69 69 79 73 67 66 76 72
DEWPT 71 71 70 70 71 71 68 68 69 69 68 66 65 66 65 65 66 66
RH 59 74 93 93 67 82 93 93 65 82 97 90 62 79 93 97 71 81
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW SC SC SC B1 SC SC B1 B1 B1 B1 B2 B1 B1 B1 B2 B2 B2
POP 12HR 20 20 30 20 40 40 40 40 30
RAIN SHWRS IS IS SC IS IS SC SC IS IS SC SC IS IS SC
TSTMS IS IS SC IS SC IS 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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