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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
401 AM EDT Sat Sep 19 2026
VAZ018-192000-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
401 AM EDT Sat Sep 19 2026
Date Sat 09/19/26 Sun 09/20/26 Mon 09/21/26
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 78 66 83 65 80
TEMP 67 68 73 76 77 73 70 68 67 68 76 81 82 71 69 68 66 66 75 79 74 66
DEWPT 65 65 66 66 65 65 65 64 64 64 68 68 68 68 66 65 65 65 70 70 69 65
MAX/MIN RH 68 92 64 98 75
RH 93 90 79 71 67 76 84 87 90 87 76 65 63 90 90 90 97 97 84 74 84 97
WIND DIR E E E SE SE SE SE SE SE S SW SW SW SW W W NW NW E SE E E
WIND SPD 1 3 3 3 4 3 3 3 3 3 3 4 3 3 2 2 2 2 2 3 3 3
CLOUDS B2 B2 B1 B1 SC B1 B1 B2 B2 B2 B1 B1 B1 B1 SC SC SC B1 B1 OV OV B2
CLOUDS(%) 76 86 68 59 35 51 69 78 73 84 67 63 69 56 34 38 39 68 68 92 92 78
VSBY 2 2 8 9 9 8 6 4 10 10 10 3 3 7 10 10 10 10 10 10 10 10
POP 12HR 20 10 40 10 90
RAIN SHWRS IS SC SC SC SC O O NM
TSTMS IS SC SC SC IS
Obvis PF PF
MIX HGT <1 <1 2 3 3 <1 <1 <1 <1 <1 2 4 2 <1 <1 <1 <1 <1 2 2 2 <1
T WIND DIR NE E E E E SE SE S S S W W W SW SW SW SW W W W W NW
T WIND SPD 3 9 6 4 4 6 4 3 4 3 9 12 12 2 8 3 3 4 17 17 16 8
DISPERSION VP VP VP VP VP VP VP VP VP VP
ADI 2 8 15 15 17 3 2 2 2 3 26 37 32 1 4 2 2 4 43 44 36 4
MAX LVORI 7 5 4 3 3 4 5 6 6 6 3 3 1 7 6 7 7 8 4 3 4 8
STABILITY F C C C B F F F F C C D C F G G G C B C C F
CEILING 100 None 400 0 None 4900 None None 5700 2600
STA PRES 27.90 27.86 27.87 27.82 27.82 27.75 27.74 27.72 27.73 27.71
Date Tue 09/22/26Wed 09/23/26Thu 09/24/26Fri 09/25/26
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 61 68 56 61 55 65 54 69
TEMP 64 61 67 62 59 56 60 56 56 56 64 59 56 54 67 60
DEWPT 61 61 66 61 58 55 60 56 55 54 62 57 54 53 60 55
RH 90100 97 97 96 96100100 96 93 93 93 93 96 78 84
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 B1 B1
POP 12HR 70 70 70 60 50 40 20 20
RAIN SHWRS NM SC SC NM NM NM NM SC SC SC SC IS IS IS IS IS
TSTMS IS IS SC IS IS IS
$$
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