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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Sun Aug 16 2026
VAZ018-162000-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
801 AM EDT Sun Aug 16 2026
Date Sun 08/16/26 Mon 08/17/26 Tue 08/18/26
UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00
EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20
MAX/MIN TEMP 86 70 87 67 85
TEMP 80 85 85 77 75 73 72 72 81 86 84 75 72 69 68 69 80 85 84 73
DEWPT 71 70 68 71 69 68 68 68 71 71 71 69 68 67 66 66 67 66 65 63
MAX/MIN RH 56 89 60 95 52
RH 74 61 57 82 82 84 87 87 72 61 65 82 87 93 93 90 65 53 53 71
WIND DIR W W W W W W W W W W W NW NW NW NW NW NW NW NW NW
WIND SPD 3 5 5 4 5 6 8 8 8 6 6 5 3 2 2 3 3 4 5 3
WIND GUST 13 16 17 14 20 25 27 26 23 20 20 18 13 14
CLOUDS SC B1 B1 B1 B1 OV B1 B1 B1 SC SC B1 SC SC SC SC SC FW FW FW
CLOUDS(%) 47 62 55 62 63 94 58 52 56 42 46 59 47 46 31 31 31 21 13 9
VSBY 10 10 10 10 9 7 5 6 10 10 10 10 10 10 10 1 10 10 10 10
POP 12HR 40 60 40 10 0
RAIN SHWRS IS SC SC SC SC NM IS
TSTMS IS IS IS SC IS IS
MIX HGT 3 4 4 <1 <1 <1 <1 1 3 5 4 1 <1 <1 <1 <1 3 6 5 1
T WIND DIR W W SW NW S W W W NW NW NW NW NW NW NW NW NW NW NW NW
T WIND SPD 13 13 14 5 2 5 8 11 14 13 14 11 3 3 3 4 4 8 8 12
DISPERSION VP PR PR PR PR VP VP VP VP
ADI 47 54 58 4 2 4 7 18 52 73 72 8 2 2 2 4 20 56 52 6
MAX LVORI 3 1 1 5 5 5 5 4 3 1 1 4 6 7 7 6 3 1 1 3
STABILITY A C C E E E D C B B B E F F G A A A A G
CEILING None None 4200 2300 None None None None None None
STA PRES 27.88 27.78 27.75 27.73 27.74 27.70 27.71 27.72 27.76 27.73
Date Wed 08/19/26Thu 08/20/26Fri 08/21/26Sat 08/22/26
UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20
MIN/MAX TEMP 63 88 67 85 65 81 64 80
TEMP 65 66 86 77 69 69 83 74 67 65 78 72 66 66 78 72
DEWPT 59 61 65 64 63 64 69 66 63 63 68 65 63 63 67 64
RH 81 84 50 64 81 84 63 76 87 93 71 79 90 90 69 76
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW FW SC SC SC B1 B1 B1 B1 B2 B1 B1 B1 B1
POP 12HR 0 5 20 30 40 60 50 40
RAIN SHWRS IS IS IS SC SC SC SC NM SC IS IS SC
TSTMS 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