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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
601 PM EDT Sat Aug 15 2026
VAZ046-160800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
601 PM EDT Sat Aug 15 2026
Date 08/15/26 Sun 08/16/26 Mon 08/17/26 Tue
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 71 89 73 93 71
TEMP 80 76 74 73 72 80 87 88 81 76 75 74 75 87 92 91 83 76 73 71 72
DEWPT 70 72 71 71 72 75 76 76 75 74 72 71 72 74 74 73 72 71 70 70 70
MIN/MAX RH 100 68 93 53 96
RH 72 87 90 93100 85 70 68 82 94 90 90 90 65 56 56 70 85 90 97 93
WIND DIR E SE SE S S S SW SW S SW SW SW W W W W W W NW N N
WIND SPD 4 4 3 4 4 6 9 8 5 5 5 5 5 8 9 8 4 3 3 3 3
CLOUDS SC B1 B2 B2 B2 B2 SC B1 B1 SC SC B1 SC FW SC SC B1 B1 SC SC SC
CLOUDS(%) 29 59 81 82 83 85 48 68 53 35 48 64 37 21 28 35 55 55 50 41 33
VSBY 10 10 8 7 6 9 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 30 50 30 20 30
RAIN SHWRS IS IS IS IS IS SC SC IS IS IS SC SC
TSTMS IS IS IS SC SC IS IS IS IS
Obvis PF
MIX HGT <1 <1 <1 <1 1 2 4 3 <1 <1 <1 <1 <1 4 6 4 <1
T WIND DIR SE SE SE S S S S S S S SW SW W NW NW W W
T WIND SPD 6 3 3 4 6 9 11 13 8 8 5 3 4 11 10 11 3
DISPERSION VP VP VP VP PR PR PR PR VP VP VP VP
ADI 3 2 2 2 10 23 53 55 5 4 4 2 4 51 65 56 2
MAX LVORI 4 7 8 9 8 4 3 1 4 6 6 6 6 1 1 1 3
STABILITY G G F F C C B B E F E E A B B B E
CEILING None 3100 700 4800 None 5500 None None None
STA PRES 29.41 29.40 29.38 29.25 29.19 29.19 29.20 29.14
Date 08/18Wed 08/19/26Thu 08/20/26Fri 08/21/26Sat 08/22/26
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 90 67 90 70 89 67 84 64 83
TEMP 89 81 70 69 88 83 73 72 88 80 70 68 82 76 66 66 81 76
DEWPT 70 68 66 65 69 68 69 68 70 69 66 63 66 64 64 64 67 66
RH 54 65 87 87 54 61 87 87 55 69 87 84 58 66 93 93 63 71
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC FW FW SC SC FW FW SC SC B1 B1 B1 SC B1 B1 B1 B1 B1
POP 12HR 5 10 0 10 30 50 40 50 30
RAIN SHWRS SC SC SC IS SC SC SC IS SC
TSTMS IS IS IS 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
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