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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1131 PM EDT Fri Aug 15 2025
NCZ003-160800-
RAWS 310302
36.35N 80.48W Elev. 1076 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 69 85 68 88 70
TEMP 71 70 71 79 83 82 78 72 71 69 70 80 85 86 80 74 72 71 72
DEWPT 70 69 70 73 71 71 72 70 69 68 68 71 70 69 71 69 68 68 69
MIN/MAX RH 99 69 98 56 93
RH 97 97 97 82 67 69 82 93 93 97 93 74 61 57 74 84 87 90 90
WIND DIR NE NE NE E E E E NE NE NE N W NW N S NW NW N N
WIND SPD 2 2 2 2 3 2 2 1 1 1 1 1 2 2 1 2 2 3 2
CLOUDS SC SC SC SC SC SC SC FW SC FW FW FW FW SC SC FW FW FW FW
CLOUDS(%) 29 36 27 39 45 32 26 16 26 20 23 15 24 35 32 16 17 16 20
VSBY 10 9 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 20 20 5 10 5
RAIN SHWRS
TSTMS
Obvis PF PF PF
MIX HGT <1 <1 <1 3 5 4 <1 <1 <1 <1 <1 3 7 5 <1
T WIND DIR N N NE NE NE E N N N NW N W W W NE
T WIND SPD 2 3 2 8 6 5 2 2 1 1 0 5 3 2 1
DISPERSION VP VP VP VP VP VP VP VP VP VP
ADI 1 2 2 28 40 28 1 1 1 1 0 20 27 14 1
MAX LVORI 8 7 8 3 1 3 5 7 8 9 8 3 2 2 4
STABILITY G G A A A A G G G G A A A A G
CEILING None None None None None None None None
STA PRES 29.06 29.06 28.99 28.98 28.96 28.95 28.89
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 88 69 84 68 83 67 79 66 74
TEMP 84 79 71 70 81 76 69 69 79 74 68 67 75 72 67 66 72 70
DEWPT 69 71 69 69 71 71 69 68 68 69 67 66 64 66 63 64 65 65
RH 61 77 93 97 72 85100 97 69 84 97 97 69 81 87 93 79 84
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW SC SC SC SC B1 SC B1 B1 B1 B1 B2 B1 B2 B2 B2 B2 B2
POP 12HR 20 20 30 30 50 40 50 40 40
RAIN SHWRS IS IS SC SC SC SC SC SC SC SC IS IS SC
TSTMS 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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