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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 AM EDT Tue Sep 22 2026
NCZ018-230800-
RAWS 311941
36.22N 81.63W Elev. 3254 ft
231 AM EDT Tue Sep 22 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 60 69 55 60 49
TEMP 62 61 68 68 66 64 63 61 59 56 59 60 59 57 55 54 52 50
DEWPT 61 61 65 64 63 61 62 60 59 56 59 59 59 57 55 54 52 50
MIN/MAX RH 100 86 100 96 100
RH 97100 90 87 90 90 97 97100100100 96100100100100100100
WIND DIR N N E SE NE E E E E E E E E E E E E E
WIND SPD 0 0 2 2 2 3 4 3 3 5 6 6 5 6 5 5 4 4
CLOUDS B2 B1 B2 B2 OV OV OV OV OV B2 B2 B2 B2 OV OV B2 B2 B2
CLOUDS(%) 76 68 82 87 91 95 88 91 88 82 80 87 80 92 92 82 85 77
VSBY 2 1 10 6 5 4 2 1 1 0 2 6 6 6 6 6 6
POP 12HR 40 90 70 80 80
RAIN C C L L D D C C S
RAIN SHWRS SC IS SC NM O NM NM SC SC
TSTMS IS IS IS SC SC
Obvis PF PF PF PF PF PF
MIX HGT <1 <1 1 2 1 <1 <1 <1 <1 1 1 1 1 1 1 1 1 1
T WIND DIR S N SW NE E NE E E NE NE NE NE NE NE E E NE NE
T WIND SPD 1 0 1 4 5 10 9 10 9 10 11 11 14 13 14 14 11 11
DISPERSION VP VP VP VP VP PR PR PR VP
ADI 1 0 2 10 7 5 6 5 4 13 17 18 23 9 10 10 8 16
MAX LVORI 10 10 6 5 5 6 6 7 9 5 5 5 5 8 7 7 8 5
STABILITY F C C C C F E F F D D D D E E E E D
CEILING 200 200 3100 300 300 300 300 300 300
STA PRES 26.92 26.95 26.96 26.98 27.00 27.06 27.06 27.06 27.04
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 60 46 67 44 67 44 67 46 70
TEMP 58 56 50 47 66 57 47 45 65 57 47 45 64 57 49 47 67 60
DEWPT 57 54 50 47 51 49 46 42 43 45 44 41 44 46 45 43 49 51
RH 96 93100100 58 75 96 89 45 64 89 86 48 67 86 86 52 72
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B1 SC SC FW FW FW FW FW FW FW FW FW SC SC SC SC
POP 12HR 20 5 10 0 0 0 0 0 5
RAIN S
$$
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