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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 AM EDT Tue Sep 22 2026
VAZ024-230800-
RAWS 441631
37.63N 79.51W Elev. 865 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 63 72 55 64 52
TEMP 64 65 70 71 69 65 62 61 58 57 60 62 63 58 56 56 54 52
DEWPT 64 65 69 67 64 62 61 60 58 57 60 61 60 58 56 56 54 52
MIN/MAX RH 100 84 100 91 100
RH 100100 97 87 84 90 97 97100100100 97 90100100100100100
WIND DIR N NE NE NE NE N NE NE N N NE NE NE NE NE NE NE NE
WIND SPD 0 1 1 4 5 5 5 4 5 6 5 5 5 6 5 4 5 5
WIND GUST 17 19 20 21 21 16 16 16 19 23 21 23 21
CLOUDS B2 B2 OV OV OV OV OV OV OV B2 B2 OV OV OV B2 B2 B2 B2
CLOUDS(%) 79 78 91 89 91 96 97 96 91 85 84 89 88 92 86 84 75 73
VSBY 2 1 2 3 3 3 1 3 4 4 3 6 6 6 6 6 6
POP 12HR 90 80 80 70 60
RAIN L L C C L L C C C
RAIN SHWRS SC SC SC SC NM O NM O NM
TSTMS IS IS IS SC
Obvis PF PF PF PF PF PF
MIX HGT <1 <1 1 1 1 1 <1 1 1 1 2 2 2 1 <1 1 1 1
T WIND DIR E E E NE NE N N NE NE NE NE NE NE NE NE NE NE N
T WIND SPD 3 3 6 10 14 12 12 13 13 14 11 12 12 12 12 12 13 12
DISPERSION VP PR PR VP PR PR PR VP PR
ADI 2 3 9 16 23 8 8 9 9 22 19 22 22 8 8 8 9 20
MAX LVORI 10 9 6 4 4 5 6 6 8 5 5 5 4 8 8 8 8 5
STABILITY F C C D D E E E E D D D D E E E E D
CEILING 300 300 1100 500 500 1000 1200 1300 800
STA PRES 28.54 28.59 28.63 28.68 28.69 28.75 28.76 28.76 28.74
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 65 46 73 46 75 48 77 49 77
TEMP 64 59 50 47 71 62 50 48 73 63 52 50 74 64 54 50 75 65
DEWPT 55 53 49 46 49 48 45 44 48 50 48 47 51 52 50 49 57 59
RH 73 80 96 96 46 60 83 86 41 62 86 89 44 65 86 96 54 81
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B1 SC FW FW FW FW FW FW FW FW FW FW FW SC SC FW SC
POP 12HR 30 0 0 0 0 0 0 0 0
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