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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
301 AM EDT Fri Sep 18 2026
NCZ005-182000-
RAWS 310540
36.38N 79.70W Elev. 858 ft
301 AM EDT Fri Sep 18 2026
Date Fri 09/18/26 Sat 09/19/26 Sun 09/20/26
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 94 69 82 66 87
TEMP 71 73 84 90 92 83 78 74 72 69 73 78 81 76 71 69 68 68 76 84 86 79
DEWPT 68 67 69 68 70 71 71 70 70 69 69 69 68 68 68 67 67 67 69 69 69 70
MAX/MIN RH 47 100 66 100 57
RH 90 81 61 49 49 67 79 87 93100 87 74 65 76 90 93 97 97 79 61 57 74
WIND DIR W NW N N N E N N NE NE NE NE NE E E E E SE S SW SW SW
WIND SPD 2 2 4 4 3 2 1 2 3 5 6 6 6 3 2 2 1 1 2 3 3 1
CLOUDS FW FW FW B1 B2 B1 B1 B2 B2 B1 B2 B2 B1 B1 B1 B1 B1 SC B1 B1 B1 SC
CLOUDS(%) 17 15 23 57 70 67 64 72 78 69 73 79 61 53 57 66 63 50 55 53 53 50
VSBY 10 10 10 8 8 8 7 7 7 7 7 7 7 10 10 10 10 10 10 10 10 10
POP 12HR 50 40 50 5 30
RAIN SHWRS SC SC SC SC SC IS IS SC SC SC SC IS
TSTMS IS SC SC IS IS IS
MIX HGT <1 <1 3 5 3 <1 <1 <1 <1 1 2 2 3 <1 <1 <1 <1 <1 3 4 4 <1
T WIND DIR W W N N NW N N N N NE NE NE NE NE NE N NE N SW SW W SW
T WIND SPD 2 2 10 10 11 11 5 3 5 13 9 8 5 8 4 4 2 0 8 6 5 2
DISPERSION VP VP VP VP VP VP VP VP VP VP
ADI 1 2 39 33 33 5 3 2 3 19 16 17 14 4 2 2 1 0 25 26 21 1
MAX LVORI 7 5 1 1 1 3 4 6 6 5 4 3 3 4 6 8 10 10 3 2 2 3
STABILITY G B B D C F F F F D D D D F F F F A C C C F
CEILING None 4000 4300 2500 1200 1200 1200 1100 None None
STA PRES 29.37 29.28 29.28 29.28 29.33 29.31 29.32 29.28 29.27 29.18
Date Mon 09/21/26Tue 09/22/26Wed 09/23/26Thu 09/24/26
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 67 88 65 79 61 69 58 74
TEMP 70 68 87 78 68 66 77 73 65 61 67 65 61 59 72 69
DEWPT 69 68 70 70 68 66 69 68 65 61 64 64 61 59 63 64
RH 97100 57 76100100 76 84100100 90 97100100 73 84
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC SC B2 B2 B1 B1 B2 B2 B2 B2 B2 B2 B2 B1 B1
POP 12HR 20 70 70 70 60 40 30 20
RAIN SHWRS IS NM NM SC SC NM NM SC SC SC SC IS IS IS
TSTMS IS SC IS 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