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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
731 AM EDT Tue Sep 22 2026
NCZ019-222000-
RAWS 312001
36.23N 81.32W Elev. 2380 ft
731 AM EDT Tue Sep 22 2026
Date Tue 09/22/26 Wed 09/23/26 Thu 09/24/26
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 74 61 62 55 62
TEMP 67 71 73 72 67 65 64 63 61 61 62 62 59 59 58 57 55 57 61 62 58
DEWPT 65 68 68 68 64 65 64 63 61 61 62 62 59 59 58 57 55 57 60 61 56
MAX/MIN RH 86 100 97 100 91
RH 93 90 84 87 90100100100100100100100100100100100100100 97 97 93
WIND DIR N E E E E E E NE NE NE NE NE NE NE NE NE NE NE NE NE NE
WIND SPD 0 1 1 1 3 4 3 2 3 4 5 4 5 5 3 2 2 3 3 3 1
CLOUDS B2 OV B2 OV OV B2 OV OV OV OV OV B2 OV OV OV B2 OV B2 B2 B2 B2
CLOUDS(%) 84 90 74 88 95 85 93 91 94 91 91 86 95 92 88 86 88 86 83 76 70
VSBY 1 10 9 5 5 4 6 7 4 5 6 6 6 6 6 6
POP 12HR 70 80 80 80 20
RAIN C L L L D D L L S S
RAIN SHWRS IS IS SC NM NM NM SC SC
TSTMS IS IS SC SC
Obvis PF PF PF PF
MIX HGT <1 1 2 2 <1 <1 1 1 <1 2 2 2 1 1 1 1 <1 2 2 2 <1
T WIND DIR N E E E N E NE NE NE NE NE NE NE NE NE NE NE NE NE N N
T WIND SPD 1 1 4 5 8 16 10 10 11 11 13 14 11 12 13 11 11 12 10 8 5
DISPERSION VP VP VP VP PR PR VP VP VP
ADI 1 2 11 13 4 11 5 5 14 19 23 25 8 8 6 5 13 27 28 20 3
MAX LVORI 10 6 5 4 6 6 7 9 5 5 5 5 8 8 8 9 5 4 4 5 6
STABILITY C C C C F E F F C D D D E E F F C C C C F
CEILING 0 1600 1700 100 200 200 200 200 200 600
STA PRES 27.96 27.97 28.01 28.04 28.10 28.10 28.10 28.08 28.10 28.07
Date Fri 09/25/26Sat 09/26/26Sun 09/27/26Mon 09/28/26
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 51 71 50 71 50 71 51 73
TEMP 54 52 69 60 53 50 69 60 53 51 70 60 55 52 70 62
DEWPT 53 50 56 52 48 44 49 48 46 44 49 49 48 47 55 56
RH 96 93 63 75 83 80 49 64 77 77 47 67 77 83 59 81
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 SC FW FW FW FW FW FW FW FW FW FW SC SC SC SC
POP 12HR 0 5 0 0 0 0 0 0
$$
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