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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 AM EDT Tue Sep 22 2026
VAZ020-230800-
RAWS 441801
37.99N 79.76W Elev. 2160 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 66 55 59 51
TEMP 64 64 66 66 64 61 60 59 58 56 57 59 58 55 56 56 53 51
DEWPT 64 64 65 63 61 56 57 57 56 56 57 58 57 51 51 52 51 50
MIN/MAX RH 100 84 100 88 98
RH 100100 97 90 90 84 90 93 93100100 96 96 86 83 86 93 96
WIND DIR NE NE NE E NE NE NE NE NE NE NE NE NE NE NE NE NE NE
WIND SPD 1 2 1 2 3 5 9 9 9 6 3 3 3 5 9 9 9 6
WIND GUST 18 21 21 21 19 18 21 21 20 17
CLOUDS OV OV OV OV OV OV OV OV OV B2 B2 B2 B2 B2 B2 B2 B2 B2
CLOUDS(%) 89 89 92 91 88 94 94 93 95 87 87 83 75 81 80 82 84 81
VSBY 0 1 1 1 1 1 1 2 2 3 2 6 6 6 6 6 6
POP 12HR 90 70 70 60 60
RAIN L L C C L L L L S
RAIN SHWRS SC SC SC SC NM NM SC NM 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 1 2 2 1 2 2 1 2
T WIND DIR E NE E E NE NE NE NE NE NE NE NE NE NE NE NE NE NE
T WIND SPD 4 3 5 12 14 12 13 14 14 13 12 12 12 12 12 12 12 11
DISPERSION VP PR PR PR PR PR PR PR PR
ADI 2 3 8 24 27 8 15 17 13 21 25 27 27 8 14 14 14 19
MAX LVORI 9 9 6 4 4 4 5 4 5 5 5 4 4 5 4 4 5 5
STABILITY F C C C C E D D D D C C C E D D D D
CEILING 600 700 700 300 0 100 100 100 100
STA PRES 27.88 27.93 27.97 28.02 28.03 28.09 28.10 28.10 28.07
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 62 46 71 45 70 48 72 49 74
TEMP 61 56 50 47 69 58 49 47 69 59 52 49 70 60 53 50 73 62
DEWPT 53 48 46 44 45 42 43 43 44 45 46 45 48 47 48 47 55 52
RH 75 74 86 89 42 55 80 86 40 60 80 86 45 62 83 89 53 70
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 SC SC FW SC SC
POP 12HR 20 0 0 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