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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 AM EDT Tue Sep 15 2026
VAZ046-160800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
231 AM EDT Tue Sep 15 2026
Date 09/14/26 Tue 09/15/26 Wed 09/16/26 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 56 81 56 87 60
TEMP 57 57 71 77 81 73 64 60 57 59 75 83 86 77 68 64 61 63
DEWPT 50 51 54 56 58 58 57 58 56 58 62 63 62 63 61 59 58 59
MIN/MAX RH 78 45 97 44 91
RH 77 80 55 48 46 59 78 93 96 96 64 51 45 62 78 84 90 87
WIND DIR N NE E E SE E SE S SW SW S S SE SE S SW SW S
WIND SPD 4 4 4 3 3 3 2 1 1 2 4 3 3 2 2 1 2 3
CLOUDS SC FW SC SC FW FW FW FW FW CL CL CL FW CL CL CL CL CL
CLOUDS(%) 32 15 30 35 24 11 19 22 12 3 5 2 6 1 3 4 3 4
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 0 0 0 0
Obvis PF PF
MIX HGT <1 <1 3 4 4 <1 <1 <1 <1 <1 3 4 4 <1
T WIND DIR E NE E N SE SE SE S SW S SW S S SE
T WIND SPD 10 5 2 0 2 4 3 2 1 3 4 2 2 4
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 5 6 8 0 12 2 2 1 1 3 16 11 12 2
MAX LVORI 3 3 2 2 2 3 4 6 7 6 2 2 2 3
STABILITY F B B B B G G G G A B B B G
CEILING None None None None None None None None
STA PRES 29.58 29.66 29.61 29.64 29.64 29.67 29.61
Date 09/17Fri 09/18/26Sat 09/19/26Sun 09/20/26Mon 09/21/26
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 91 66 93 66 84 67 90 67 85
TEMP 88 80 68 68 92 80 69 67 81 77 69 68 87 80 70 67 83 75
DEWPT 63 63 59 60 68 70 67 63 67 68 67 67 69 69 68 67 68 67
RH 43 56 73 76 46 72 93 87 63 74 93 97 55 69 93100 61 76
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS CL FW FW FW FW B1 B1 SC SC SC B1 SC SC SC B1 SC SC B1
POP 12HR 5 5 50 40 10 5 20 30 50
RAIN SHWRS SC SC IS SC IS IS SC
TSTMS 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