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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
331 AM EDT Tue Sep 15 2026
NCZ005-152000-
RAWS 310540
36.38N 79.70W Elev. 858 ft
331 AM EDT Tue Sep 15 2026
Date Tue 09/15/26 Wed 09/16/26 Thu 09/17/26
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 84 58 88 60 91
TEMP 63 62 73 81 84 76 67 62 59 60 77 85 87 79 68 63 61 62 80 89 90 82
DEWPT 52 52 55 57 59 59 58 58 57 58 60 61 60 59 58 58 57 58 60 59 58 58
MAX/MIN RH 44 94 40 92 34
RH 67 70 53 44 43 56 73 87 93 93 56 45 40 50 70 84 87 87 51 37 34 44
WIND DIR NE NE E E E E E E N N S SE E E S N N SW S S S S
WIND SPD 4 4 5 3 3 3 2 1 0 0 2 3 3 2 1 0 0 1 2 3 3 3
CLOUDS B1 SC B1 SC SC SC FW FW FW CL FW FW CL CL CL FW FW CL CL FW CL FW
CLOUDS(%) 54 40 62 37 32 35 25 20 14 3 9 17 4 4 3 14 6 3 4 9 3 9
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 0 0 0 0
Obvis PF PF
MIX HGT <1 <1 3 4 5 <1 <1 <1 <1 <1 3 4 5 <1 <1 <1 <1 <1 3 5 5 <1
T WIND DIR E E E E E E NE NE E SE SW S E SE S S S S SW SW S S
T WIND SPD 17 13 10 5 4 5 1 1 1 2 3 1 1 4 3 3 3 3 8 5 3 3
DISPERSION VP VP VP VP VP VP VP VP VP VP
ADI 7 13 24 22 19 4 3 3 2 8 13 6 6 1
MAX LVORI 3 4 2 2 2 3 3 5 6 5 2 2 2 2
STABILITY F B B B B G G G G A B B B G
CEILING None None None None None None None None None None
STA PRES 29.60 29.57 29.60 29.60 29.64 29.58
Date Fri 09/18/26Sat 09/19/26Sun 09/20/26Mon 09/21/26
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 94 66 87 67 90 67 87
TEMP 68 67 93 83 70 68 85 81 70 68 88 82 71 68 85 77
DEWPT 57 59 65 67 66 65 66 66 67 68 68 68 68 68 68 68
RH 68 75 40 59 87 90 53 60 90100 52 63 90100 57 74
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW CL FW B1 B1 SC SC SC SC SC SC SC SC SC SC B1
POP 12HR 5 30 30 10 5 20 20 50
RAIN SHWRS SC SC IS IS IS SC
TSTMS 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