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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 PM EDT Sun Sep 20 2026
NCZ003-210800-
RAWS 310302
36.35N 80.48W Elev. 1076 ft
801 PM EDT Sun Sep 20 2026
Date 09/20/26 Mon 09/21/26 Tue 09/22/26 Wed
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 67 85 66 77 60
TEMP 71 69 68 68 80 85 82 74 70 68 68 67 73 77 75 69 66 65 62 61
DEWPT 69 68 67 67 70 69 69 69 68 67 67 66 67 69 68 67 66 65 62 61
MIN/MAX RH 97 58 97 76 100
RH 93 97 97 97 72 59 65 84 93 97 97 97 81 76 79 93100100100100
WIND DIR SW W W N E E N NE E NE NE NE NE NE NE NE NE NE NE NE
WIND SPD 2 2 2 2 3 3 3 3 4 3 3 4 3 4 4 8 11 12 13 12
CLOUDS B1 SC SC SC FW B1 B2 OV B2 B2 B2 B2 B2 OV OV OV OV B2 B2 B2
CLOUDS(%) 62 33 36 45 24 60 83 88 80 73 85 74 80 97 97 98 98 84 87 80
VSBY 7 7 6 3 7 7 3 3 2 1 7 6 9 3 3 3 3 6 6 6
POP 12HR 30 70 70 80 80
RAIN SHWRS SC NM NM NM NM SC IS IS O O O O NM NM SC
TSTMS SC SC SC SC SC SC IS
Obvis PF PF
MIX HGT <1 <1 <1 <1 2 4 2 <1 <1 <1 <1 <1 1 3 2 <1
T WIND DIR NW W NW NW N E SE E NE N E NE NE NE NE NE
T WIND SPD 2 2 1 1 1 2 4 9 13 6 6 5 9 9 11 14
DISPERSION VP VP VP VP VP VP VP PR FR FR FR
ADI 1 1 1 1 3 12 12 4 9 3 3 7 18 22 23 13
MAX LVORI 7 8 9 8 3 2 2 5 6 8 8 6 4 3 3 5
STABILITY F G G B B B C F E F F D C D D D
CEILING None None None 5200 1400 1400 500 500 500
STA PRES 28.90 28.90 28.93 28.86 28.94 28.97 29.01 29.01
Date 09/23Thu 09/24/26Fri 09/25/26Sat 09/26/26Sun 09/27/26
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 65 56 65 53 70 51 73 51 75
TEMP 65 63 59 58 63 61 55 54 68 63 54 52 71 64 54 52 73 65
DEWPT 64 62 59 58 62 60 55 52 57 56 50 48 52 53 49 49 53 56
RH 97 97100100 97 97100 93 68 78 86 86 51 67 83 89 49 73
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B2 B2 B2 B2 B1 B1 SC SC SC SC SC SC SC SC FW FW
POP 12HR 70 70 40 5 5 5 5 5 0
RAIN SHWRS SC NM NM SC 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