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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Sun Aug 16 2026
VAZ024-162000-
RAWS 441631
37.63N 79.51W Elev. 865 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 87 71 93 67 92
TEMP 80 87 87 81 76 74 72 73 85 91 91 81 74 70 68 70 83 89 91 82
DEWPT 73 73 73 74 72 71 69 71 72 71 71 70 69 68 67 68 68 66 65 64
MAX/MIN RH 62 93 50 99 41
RH 79 63 63 79 87 90 90 93 65 52 52 69 84 93 97 93 61 47 42 55
WIND DIR S SW SW S SW SW SW SW W W W NW NW NW NW NW NW NW NW NW
WIND SPD 3 4 4 2 2 2 3 3 5 5 5 3 1 1 1 1 2 3 3 2
WIND GUST 12 16 16 16
CLOUDS B2 B1 B1 B1 B2 OV B1 SC SC SC SC B1 SC SC FW FW SC FW FW FW
CLOUDS(%) 77 57 60 56 75 92 57 37 33 45 33 64 44 37 20 19 27 17 15 7
VSBY 10 10 10 10 9 7 6 9 10 10 10 10 10 10 2 2 10 10 10 10
POP 12HR 60 40 10 5 0
RAIN SHWRS SC SC SC SC SC SC
TSTMS IS IS IS SC IS
MIX HGT 2 3 3 <1 <1 <1 <1 <1 3 5 5 <1 <1 <1 <1 <1 4 6 6 <1
T WIND DIR SW SW SW W E SW W W NW NW W NW NW N NW NW NW NW NW N
T WIND SPD 12 11 16 8 1 6 6 8 14 11 13 11 3 3 3 3 3 5 6 6
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 33 40 48 4 1 3 3 8 66 70 80 5 2 2 2 3 16 42 49 3
MAX LVORI 3 3 1 4 7 6 6 6 1 1 1 3 5 7 8 6 2 1 1 3
STABILITY B C C F F F F A A A A F F G G A A A A G
CEILING 300 3100 6100 8200 None None None None None None
STA PRES 28.58 28.47 28.43 28.41 28.42 28.38 28.40 28.41 28.45 28.41
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 93 68 91 64 85 64 86
TEMP 67 66 90 83 71 70 89 80 69 66 83 76 67 66 84 77
DEWPT 62 62 65 65 65 66 68 67 66 64 67 66 65 65 67 65
RH 84 87 44 55 81 87 50 65 90 93 59 71 93 97 57 67
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW FW SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1
POP 12HR 0 5 20 40 50 50 50 40
RAIN SHWRS IS IS SC SC IS SC SC SC IS IS SC
TSTMS SC IS SC IS IS
$$
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