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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
131 AM EDT Fri Mar 20 2026
VAZ012-210800-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
131 AM EDT Fri Mar 20 2026
Date 03/19/26 Fri 03/20/26 Sat 03/21/26 Sun
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 34 65 51 70 49
TEMP 37 35 34 57 65 64 57 54 54 52 51 62 68 70 62 55 52 51 51
DEWPT 33 31 31 38 39 39 42 44 46 47 47 50 48 46 48 48 48 48 47
MIN/MAX RH 86 38 88 43 92
RH 85 85 89 49 38 40 57 69 74 83 86 65 49 42 60 77 86 89 86
WIND DIR W W W SW W W W W W W W W W W W W W W W
WIND SPD 4 4 3 6 9 10 8 9 9 3 3 3 3 3 2 2 2 2 2
WIND GUST 17
CLOUDS FW SC SC SC B2 OV B1 B1 B1 B1 B2 B2 B2 B1 FW FW FW SC B1
CLOUDS(%) 9 26 28 29 78 89 68 57 60 61 78 74 74 51 21 16 23 36 56
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 10 40 10 5
RAIN SHWRS SC SC IS IS
MIX HGT <1 <1 <1 2 4 3 <1 <1 <1 <1 <1 1 2 4 <1
T WIND DIR W W W SW SW SW SW SW W W NW NW W W W
T WIND SPD 3 3 3 16 21 21 9 12 13 9 9 6 4 8 4
DISPERSION VP VP PR PR PR VP VP VP VP VP
ADI 2 2 4 41 77 71 6 8 9 4 7 9 13 41 2
MAX LVORI 5 5 6 1 1 1 3 3 4 5 5 3 2 1 3
STABILITY G G B B C C E E E F C C B B G
CEILING None None 11000 3800 700 700 None None
STA PRES 27.34 27.31 27.20 27.13 27.10 27.16 27.12
Date 03/22Mon 03/23/26Tue 03/24/26Wed 03/25/26Thu 03/26/26
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 78 51 61 29 58 37 59 39 70
TEMP 77 67 60 54 61 49 36 30 56 49 41 38 58 52 43 41 69 62
DEWPT 49 50 50 48 37 26 25 23 23 26 28 31 35 35 36 36 43 44
RH 37 54 69 80 41 40 64 75 27 40 59 76 42 52 76 82 39 52
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC FW SC B1 SC FW FW FW SC SC B1 B1 B1 B1 SC SC SC SC
POP 12HR 5 30 20 10 10 20 20 10 10
RAIN SHWRS IS SC IS IS IS IS
SNOWSHWRS 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