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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1131 PM EDT Fri Aug 15 2025
VAZ020-160800-
RAWS 441801
37.99N 79.76W Elev. 2160 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 88 66 89 67
TEMP 70 68 70 82 86 85 74 70 69 67 69 82 87 86 77 72 70 68 70
DEWPT 67 67 68 70 68 68 68 68 67 66 67 68 67 68 68 67 67 66 67
MIN/MAX RH 99 56 99 51 96
RH 90 97 93 67 55 57 82 93 93 97 93 63 52 55 74 84 90 93 90
WIND DIR N N N SE SE SE SE S SW W W NW NW NW NW NW NW N N
WIND SPD 2 2 2 1 1 1 1 1 1 1 2 2 2 3 2 2 2 3 3
CLOUDS SC SC SC SC SC SC B1 SC FW SC SC SC SC SC SC SC SC SC SC
CLOUDS(%) 42 41 41 39 28 37 55 33 23 28 30 27 40 30 34 31 29 36 32
VSBY 6 2 2 10 10 10 10 3 2 1 8 4 10 10 10 3 2 1
POP 12HR 5 30 10 20 10
RAIN SHWRS IS IS IS
TSTMS IS IS IS
Obvis PF PF
MIX HGT <1 <1 <1 3 5 4 <1 <1 <1 <1 <1 3 6 6 <1
T WIND DIR N N N E N E S N S SW W W NW NW N
T WIND SPD 3 2 2 3 2 1 8 0 2 2 1 2 4 4 2
DISPERSION VP VP VP VP VP VP VP VP VP VP
ADI 2 1 2 13 15 6 4 0 1 1 1 9 32 33 1
MAX LVORI 7 8 6 3 2 3 5 7 7 8 8 3 1 1 3
STABILITY F F A A A A F G G G A A A A G
CEILING None None None None None None None None
STA PRES 27.99 27.99 27.91 27.90 27.87 27.87 27.83
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 68 83 66 81 65 78 62 76
TEMP 86 75 70 69 81 72 68 68 78 69 67 66 76 67 64 64 75 67
DEWPT 67 68 67 68 70 69 66 66 68 66 64 64 63 62 60 62 63 61
RH 53 79 90 97 69 90 93 93 71 90 90 93 64 84 87 93 66 81
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC SC B1 B1 B1 B1 B2 B2 B2 B2 B2 B1 B1 B1 B1 B2 B2
POP 12HR 30 20 50 40 60 40 40 20 30
RAIN SHWRS SC IS IS SC SC IS IS NM SC SC SC SC IS IS SC
TSTMS SC IS IS SC SC 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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