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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 PM EDT Wed Aug 19 2026
VAZ046-200800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
801 PM EDT Wed Aug 19 2026
Date 08/19/26 Thu 08/20/26 Fri 08/21/26 Sat
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 70 91 67 83 66
TEMP 75 73 71 72 83 89 88 77 72 69 68 69 77 82 81 73 70 68 67 68
DEWPT 66 66 67 67 69 69 70 70 70 69 68 68 70 72 71 70 69 68 67 68
MIN/MAX RH 91 52 100 70 100
RH 74 79 87 84 63 52 55 79 93100100 97 79 72 72 90 97100100100
WIND DIR W W W W SW W W N N N NE NE NE NE E NE NE N N N
WIND SPD 3 2 2 2 4 6 6 4 3 3 4 4 5 5 5 3 2 2 2 3
CLOUDS CL FW FW FW FW B1 B1 B1 SC SC B2 B1 B2 B2 B2 B2 B2 B2 B2 B1
CLOUDS(%) 3 13 13 24 16 55 56 52 40 45 80 68 74 79 79 85 85 77 83 67
VSBY 10 10 9 10 10 10 10 10 8 7 7 7 8 10 10 10
POP 12HR 0 30 30 70 80
RAIN SHWRS SC SC SC IS IS IS IS IS NM NM O O SC SC IS
TSTMS IS IS IS IS SC SC IS IS
MIX HGT <1 <1 <1 <1 3 6 4 <1 <1 <1 <1 <1 2 3 3 <1
T WIND DIR W W N NE S SW SW NW N N N N N NE N NE
T WIND SPD 2 2 2 2 10 13 8 1 19 14 10 6 9 3 0 5
DISPERSION VP VP VP VP VP VP VP VP VP VP VP
ADI 1 1 1 2 42 63 29 1 9 7 7 8 21 11 0 3
MAX LVORI 3 4 5 5 1 1 2 4 6 8 8 8 3 3 4 6
STABILITY G G G A A C C E G F E C C C C F
CEILING None None None None None 400 400 1600 8600
STA PRES 29.24 29.26 29.26 29.21 29.29 29.37 29.37 29.32
Date 08/22Sun 08/23/26Mon 08/24/26Tue 08/25/26Wed 08/26/26
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 65 87 63 86 62 85 65 88
TEMP 82 77 68 68 85 78 66 66 84 77 65 64 83 77 67 67 86 78
DEWPT 72 70 68 67 66 63 62 62 62 61 60 60 65 64 65 65 69 68
RH 72 79100 97 53 60 87 87 48 58 84 87 55 64 93 93 57 71
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B1 SC FW FW FW FW FW FW FW FW FW SC SC SC SC B1 B1
POP 12HR 30 10 5 5 5 20 20 20 40
RAIN SHWRS IS SC IS IS IS IS IS IS SC
TSTMS 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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