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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 PM EDT Mon Aug 17 2026
VAZ018-180800-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
801 PM EDT Mon Aug 17 2026
Date 08/17/26 Tue 08/18/26 Wed 08/19/26 Thu
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 68 86 62 87 67
TEMP 72 71 70 70 79 84 82 73 68 65 63 66 80 86 85 75 71 69 67 69
DEWPT 69 68 67 68 70 68 67 65 64 62 60 62 64 64 63 64 63 63 62 64
MIN/MAX RH 93 57 90 46 85
RH 90 90 90 93 74 59 61 76 87 90 90 87 58 48 48 69 76 81 84 84
WIND DIR W W NW NW NW NW NW NW NW NW NW NW W W NW NW NW W W W
WIND SPD 3 3 4 4 4 4 6 4 2 2 1 2 2 3 4 2 1 1 1 1
WIND GUST 13 14 16 16
CLOUDS B2 SC SC SC B1 SC FW FW FW CL FW SC FW FW FW FW FW FW SC SC
CLOUDS(%) 79 49 42 37 51 40 20 12 14 5 24 26 11 10 16 20 21 20 31 40
VSBY 8 5 3 2 10 10 10 10 9 7 5 10 10 10 10 10 10 10 10 7
POP 12HR 30 10 0 0 5
RAIN SHWRS IS
TSTMS
Obvis F F F F+
MIX HGT <1 <1 <1 <1 3 4 4 <1 <1 <1 <1 <1 3 5 6 <1
T WIND DIR NW NW NW N NE S W NW NW NW NW NW NW NW NW NW
T WIND SPD 3 2 2 2 3 4 5 10 5 5 5 5 12 10 13 11
DISPERSION VP VP VP VP VP VP VP VP VP VP VP
ADI 2 1 2 2 10 23 31 5 3 3 3 6 53 59 98 5
MAX LVORI 7 7 7 6 3 2 1 4 5 5 6 5 1 1 1 3
STABILITY F G E A C A A F G G G A A A A G
CEILING 3300 None None None None None None None None
STA PRES 27.75 27.74 27.77 27.72 27.76 27.76 27.78 27.76
Date 08/20Fri 08/21/26Sat 08/22/26Sun 08/23/26Mon 08/24/26
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 85 66 82 65 80 64 81 60 80
TEMP 85 75 69 67 79 71 68 66 79 71 67 65 79 70 63 61 78 69
DEWPT 69 68 66 66 71 68 65 65 69 66 63 63 65 61 59 58 61 58
RH 59 79 90 97 77 90 90 97 72 84 87 93 62 73 87 90 56 68
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B2 B1 B1 B1 B2 B1 B1 B1 B1 SC SC SC SC FW SC SC SC
POP 12HR 70 50 60 50 30 30 20 5 5
RAIN SHWRS IS NM SC SC SC NM SC IS IS SC SC IS
TSTMS IS SC IS IS NM IS SC 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
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