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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
401 PM EDT Sat Sep 19 2026
NCZ003-200800-
RAWS 310301
36.48N 80.86W Elev. 1300 ft
401 PM EDT Sat Sep 19 2026
Date 09/19/26 Sun 09/20/26 Mon 09/21/26 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 66 86 65 86 64
TEMP 81 74 70 68 67 67 75 83 83 75 70 68 66 66 80 84 80 73 68 67 65 64
DEWPT 70 69 68 68 67 67 71 70 71 72 69 68 66 66 72 72 73 71 68 67 65 64
MIN/MAX RH 100 62 100 67 100
RH 69 84 93100100100 87 65 67 90 97100100100 77 67 79 93100100100100
WIND DIR SE SE N N N N S S SW N N N NW NW NE SE E NE E E E E
WIND SPD 3 1 0 0 0 0 3 3 2 0 0 0 1 1 1 3 2 2 1 1 1 1
CLOUDS SC B1 B1 B2 B2 B2 B2 B1 B2 B1 B1 SC SC SC SC B2 B2 B2 B2 B2 OV B2
CLOUDS(%) 48 51 60 81 85 83 78 69 70 60 52 35 28 48 48 87 87 87 87 86 92 83
VSBY 10 10 9 8 6 6 10 10 10 10 10 6 4 8 10 10 10 10
POP 12HR 40 60 40 80 80
RAIN SHWRS IS SC SC SC NM SC SC IS IS O O O O SC SC SC
TSTMS IS IS SC SC SC SC SC IS
MIX HGT 3 <1 <1 <1 <1 <1 2 3 2 <1 <1 <1 <1 <1 2 4 <1 <1
T WIND DIR S SE N E SE S SW SW SW SW SW W NW NW NW S E E
T WIND SPD 3 1 1 1 5 5 9 5 9 8 3 2 3 4 5 3 8 9
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 14 1 1 1 3 4 20 19 21 4 2 1 2 4 17 13 8 4
MAX LVORI 3 6 9 10 9 9 4 3 3 6 10 10 10 9 3 3 4 6
STABILITY B F F F F C C C C F F G G A A C C F
CEILING 3900 1200 600 1300 None None None 2300 500
STA PRES 28.17 28.14 28.16 28.09 28.10 28.10 28.12 28.08
Date 09/22Wed 09/23/26Thu 09/24/26Fri 09/25/26Sat 09/26/26
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 75 60 68 57 69 55 72 52 73
TEMP 72 68 63 61 65 64 59 58 67 64 58 56 70 65 56 53 70 65
DEWPT 70 68 63 61 65 63 59 58 64 62 57 56 61 59 54 52 57 57
RH 93100100100100 97100100 90 93 96100 73 81 93 96 63 75
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 OV B2 OV B2 B2 B2 B2 B2 B2 SC SC SC SC SC SC SC SC
POP 12HR 70 70 60 60 30 10 20 10 10
RAIN SHWRS SC NM NM NM NM SC NM NM SC IS IS
TSTMS 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