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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
131 AM EDT Sun Sep 20 2026
VAZ018-210800-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
131 AM EDT Sun Sep 20 2026
Date 09/19/26 Sun 09/20/26 Mon 09/21/26 Tue
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 66 87 66 81 63
TEMP 68 67 67 78 86 81 71 69 68 67 66 76 80 75 68 65 65 64 63
DEWPT 65 65 65 68 67 67 69 66 66 65 65 70 71 70 67 64 63 62 62
MIN/MAX RH 95 53 99 74 99
RH 90 93 93 71 53 63 93 90 93 93 97 82 74 84 97 97 93 93 97
WIND DIR S S SW SW NW SW W W W NW N SE SE E E SE E E E
WIND SPD 3 3 2 3 6 3 2 2 2 1 1 2 3 3 2 3 2 2 2
CLOUDS B1 SC SC SC B1 B2 SC FW FW FW SC B2 B2 B2 OV OV B2 B2 B2
CLOUDS(%) 59 49 46 35 64 85 34 16 15 10 46 70 80 86 90 90 86 78 84
VSBY 8 6 4 10 10 10 9 8 6 3 5 10 10 10 10
POP 12HR 10 30 10 80 80
RAIN SHWRS IS SC IS NM SC O O SC SC NM
TSTMS IS SC IS SC SC SC IS
Obvis PF PF PF
MIX HGT <1 <1 <1 2 4 2 <1 <1 <1 <1 <1 2 3 1 <1
T WIND DIR S S S W W SW SW SW W NW N SE E E E
T WIND SPD 10 6 6 12 9 6 2 2 2 2 1 5 10 10 9
DISPERSION VP VP VP VP VP VP VP VP VP VP
ADI 5 3 5 38 36 19 1 1 1 1 1 15 33 16 4
MAX LVORI 6 6 7 3 1 2 7 7 7 7 9 4 3 4 9
STABILITY F F C B C C F G G G C C C C F
CEILING None None 2300 None None 300 700 0
STA PRES 27.81 27.80 27.73 27.75 27.77 27.82 27.81
Date 09/22Wed 09/23/26Thu 09/24/26Fri 09/25/26Sat 09/26/26
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 71 58 61 55 62 54 70 52 71
TEMP 70 62 61 58 60 56 56 55 61 56 55 54 68 59 54 52 69 60
DEWPT 68 62 60 57 60 56 56 54 61 56 54 52 59 54 50 49 56 52
RH 93100 97 96100100100 96100100 96 93 73 83 86 89 63 75
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 OV OV B2 B2 B2 B2 B2 B2 B2 B1 B1 SC SC SC SC SC SC
POP 12HR 90 80 80 70 50 20 10 5 10
RAIN SHWRS NM O O NM O NM NM NM SC SC IS
TSTMS SC
$$
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