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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Tue Sep 22 2026
NCZ006-222000-
RAWS 310801
36.37N 79.29W Elev. 580 ft
801 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 79 59 65 54 65
TEMP 76 79 74 67 65 63 61 61 64 65 64 62 61 59 57 54 59 63 65 61
DEWPT 73 71 70 67 65 63 61 61 64 64 64 62 61 59 57 54 59 60 61 58
MAX/MIN RH 77 100 97 100 86
RH 90 77 87100100100100100100 97100100100100100100100 90 87 90
WIND DIR E NE NE NE NE NE NE NE NE NE NE NE NE NE N N N N N N
WIND SPD 3 4 8 9 5 5 9 10 10 10 10 10 8 6 10 10 11 10 10 6
WIND GUST 20 21 21 21 21 20
CLOUDS OV B2 OV OV OV OV OV OV OV OV OV OV B2 B2 B2 B2 B2 B2 B2 B1
CLOUDS(%) 88 79 92 95 96 92 92 90 91 88 95 94 87 81 81 84 83 73 74 68
VSBY 4 7 5 4 4 5 5 4 5 6 6 6 6 6 6
POP 12HR 80 90 70 70 40
RAIN L L L L L L L L C C S S
RAIN SHWRS SC SC NM O O O NM
TSTMS IS SC SC
Obvis PF PF PF PF PF
MIX HGT 2 2 1 1 1 <1 1 1 2 2 2 <1 <1 <1 1 2 2 2 3 <1
T WIND DIR E SE NE NE N N N N N N N NE NE N N N N N N N
T WIND SPD 8 6 6 14 11 12 11 11 12 16 12 13 13 14 16 14 12 12 13 14
DISPERSION PR PR PR PR FR PR PR FR PR
ADI 16 13 11 13 8 8 10 18 22 29 23 12 12 10 14 29 25 27 32 10
MAX LVORI 4 4 5 5 6 6 7 5 5 4 5 5 5 7 5 4 5 4 4 5
STABILITY C D D D E E D D D D D D D E D D D D D E
CEILING 600 1700 700 700 800 800 800 800 1200 3300
STA PRES 29.42 29.42 29.48 29.50 29.57 29.58 29.58 29.55 29.56 29.54
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 49 71 48 74 50 75 51 77
TEMP 54 50 69 63 53 50 71 64 55 52 73 66 55 52 75 67
DEWPT 53 50 54 54 47 46 52 53 49 49 54 56 51 51 58 60
RH 96100 59 72 80 86 51 67 80 89 51 70 86 96 55 78
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 FW FW FW FW CL CL FW FW FW FW FW SC SC SC SC
POP 12HR 0 0 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