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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 PM EDT Wed Sep 16 2026
VAZ046-170800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
801 PM EDT Wed Sep 16 2026
Date 09/16/26 Thu 09/17/26 Fri 09/18/26 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 63 93 68 88 64
TEMP 70 67 64 66 83 91 90 79 74 71 70 71 85 88 85 76 72 69 66 66
DEWPT 63 62 61 62 66 67 68 69 69 68 68 69 70 70 70 70 67 64 61 60
MIN/MAX RH 93 44 97 55 86
RH 78 84 90 87 57 45 49 72 84 90 93 93 61 55 61 82 84 84 84 81
WIND DIR S SW SW SW SW S S S W W W N NE NE NE NE NE NE NE NE
WIND SPD 4 3 3 4 4 5 5 4 4 3 3 3 5 6 8 5 5 5 8 8
WIND GUST 16
CLOUDS CL CL FW CL CL FW B1 B2 SC FW FW SC SC B1 B1 SC B1 B1 B2 B1
CLOUDS(%) 0 2 10 0 5 12 53 78 42 20 16 33 38 69 69 50 56 69 74 59
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 30 5 50 10
RAIN SHWRS IS SC SC
TSTMS IS IS IS
MIX HGT <1 <1 <1 <1 2 5 2 <1 <1 <1 <1 <1 4 4 3 <1
T WIND DIR S SW SW SW SW SW W W SW W NW N N N NE NE
T WIND SPD 3 3 2 3 6 10 11 8 4 4 3 3 13 9 9 4
DISPERSION VP VP VP VP VP VP VP PR PR PR PR
ADI 2 2 1 4 16 62 31 4 2 2 2 4 63 25 20 3
MAX LVORI 5 7 7 6 2 1 1 3 5 6 7 6 1 2 3 5
STABILITY G G G B B B B F G F G B B D D E
CEILING None None None None None None None 6900 6000
STA PRES 4.928 29.55 29.52 29.43 29.40 29.39 29.41 29.36
Date 09/19Sun 09/20/26Mon 09/21/26Tue 09/22/26Wed 09/23/26
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 81 63 88 65 84 64 79 61 76
TEMP 79 75 68 67 85 79 70 68 82 75 67 66 77 73 66 64 75 71
DEWPT 65 65 65 65 70 70 68 67 69 69 67 66 70 69 66 64 67 66
RH 62 71 90 93 61 74 93 97 65 82100100 79 87100100 76 84
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B2 B2 B2 B2 B2 B2 B2 B2
POP 12HR 5 5 30 30 50 50 50 50 40
RAIN SHWRS SC SC SC SC IS IS SC SC SC SC SC
TSTMS IS IS SC 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