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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
131 PM EDT Thu Sep 17 2026
VAZ046-172000-
RAWS 441101
37.39N 78.80W Elev. 804 ft
131 PM EDT Thu Sep 17 2026
Date Thu 09/17/26 Fri 09/18/26 Sat 09/19/26
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 92 68 90 65 79
TEMP 90 88 78 74 72 71 71 85 90 85 76 71 70 67 66 71 76 79 75
DEWPT 66 68 70 70 69 69 70 71 71 72 72 70 68 66 64 64 66 66 67
MAX/MIN RH 45 95 53 97 64
RH 45 52 76 87 90 93 97 63 54 65 87 97 93 97 93 79 71 64 76
WIND DIR SW SW SW SW W NW N NE NE NE NE NE NE NE NE NE NE E E
WIND SPD 5 5 3 3 3 3 2 4 4 5 4 3 4 6 8 8 5 5 3
CLOUDS FW B1 B1 SC SC SC FW FW SC B2 B1 B2 B2 B2 B2 B2 B1 B2 B1
CLOUDS(%) 19 67 68 45 27 31 25 17 38 72 66 84 79 72 75 78 67 70 55
VSBY 7 6 10 10 10 6 6 10 7 6 6 6 7 7 10 10 10 10 10
POP 12HR 50 10 60 60 10
RAIN SHWRS IS SC IS NM SC SC SC IS
TSTMS IS SC IS SC IS
MIX HGT 6 2 <1 <1 <1 <1 <1 3 5 3 <1 <1 <1 <1 <1 2 3 3 <1
T WIND DIR NW W S W W W N NE W NE NE N N NE NE NE E E E
T WIND SPD 3 8 3 3 3 2 0 5 2 3 13 10 4 11 10 5 3 3 9
DISPERSION VP VP VP VP VP VP VP PR VP
ADI 24 17 2 2 2 1 0 23 12 8 9 5 3 8 12 10 8 8 4
MAX LVORI 2 2 4 6 7 7 8 2 2 3 5 7 8 6 5 4 3 3 4
STABILITY B D F F G G B B B D E F E E D D D D F
CEILING None None None None 2700 1300 2500 1500 2700
STA PRES 29.42 29.42 29.38 29.38 29.32 29.37 29.38 29.40 29.36
Date Sun 09/20/26Mon 09/21/26Tue 09/22/26Wed 09/23/26
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 65 86 66 83 64 74 59 69
TEMP 68 67 83 79 70 68 82 72 67 64 71 68 62 59 66 64
DEWPT 65 67 71 71 69 68 70 69 67 64 68 67 62 59 63 63
RH 90100 67 77 97100 67 90100100 90 97100100 90 97
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B1 SC SC B1 B1 B1 B1 B2 B2 B2 B2 B2 B2 B2 B2
POP 12HR 0 20 30 50 60 60 50 30
RAIN SHWRS IS SC SC NM SC SC NM SC SC IS SC
TSTMS IS IS SC 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