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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1131 PM EDT Mon Sep 21 2026
NCZ003-220800-
RAWS 310302
36.35N 80.48W Elev. 1076 ft
1131 PM EDT Mon Sep 21 2026
Date 09/21/26 Tue 09/22/26 Wed 09/23/26 Thu
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 74 59 62 55
TEMP 69 69 68 70 73 72 67 64 62 61 60 61 61 61 60 59 58 57 56
DEWPT 68 67 67 69 69 68 66 63 62 60 59 60 60 60 60 59 58 57 56
MIN/MAX RH 100 87 98 97 100
RH 97 93 97 97 87 87 97 97100 97 96 97 97 97100100100100100
WIND DIR E NE NE E E NE NE NE NE NE NE NE NE NE NE NE NE NE NE
WIND SPD 5 4 4 3 3 4 9 11 13 14 13 10 10 9 12 14 14 13 11
WIND GUST 23 21 20
CLOUDS B2 B2 B2 OV B2 B2 OV OV OV OV B2 B2 B2 B2 B2 B2 B2 B2 B2
CLOUDS(%) 76 74 84 90 77 80 90 94 93 90 81 86 81 82 85 84 83 85 78
VSBY 5 4 5 6 8 5 4 3 6 5 6 6 6 6 10
POP 12HR 40 80 90 70 70
RAIN D D L C L L L L L L L L C
RAIN SHWRS SC SC SC SC NM NM
TSTMS IS IS SC SC
MIX HGT <1 <1 1 1 2 2 1 1 1 1 1 2 2 2 1
T WIND DIR NE NE NE SE SW N NE NE NE NE NE NE NE NE NE
T WIND SPD 6 5 4 4 3 4 11 12 11 12 13 12 16 16 12
DISPERSION PR VP PR FR FR GD FR GD GD FR
ADI 5 4 6 8 8 8 10 11 10 11 21 22 29 31 14
MAX LVORI 7 8 9 6 5 5 6 7 7 7 5 5 4 4 5
STABILITY E E C C C D D D D D D D D D D
CEILING 500 3200 1300 600 600 700 700 700
STA PRES 28.99 29.02 29.00 29.06 29.07 29.13 29.14
Date 09/24Fri 09/25/26Sat 09/26/26Sun 09/27/26Mon 09/28/26
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 63 51 71 49 73 50 75 51 74
TEMP 60 58 53 52 69 62 53 50 69 63 53 51 72 65 54 52 72 64
DEWPT 60 58 53 51 55 55 49 46 51 52 48 47 52 54 50 50 59 60
RH 100100100 96 61 78 86 86 53 67 83 86 49 68 86 93 64 87
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B1 SC SC FW FW FW FW CL FW FW FW FW FW SC FW FW FW
POP 12HR 30 0 0 0 0 0 0 0 5
RAIN C
$$
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