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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1031 AM EDT Thu Apr 16 2026
VAZ012-162000-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
1031 AM EDT Thu Apr 16 2026
Date Thu 04/16/26 Fri 04/17/26 Sat 04/18/26
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 81 56 79 51 83
TEMP 72 79 79 70 64 60 57 57 71 76 78 71 59 54 52 54 77 81 83 74
DEWPT 48 47 48 49 54 56 55 54 52 46 44 45 46 46 45 47 49 48 50 52
MAX/MIN RH 33 95 30 82 31
RH 42 32 34 47 70 87 93 90 51 34 30 39 62 74 77 77 37 32 32 46
WIND DIR W SW W W W W W W NW NW NW W W SW SW S SW SW SW SW
WIND SPD 9 10 11 3 3 2 2 3 3 3 2 1 1 1 1 1 3 4 4 3
CLOUDS FW CL FW B1 B1 B1 B1 SC FW FW FW FW FW SC SC SC FW B1 B1 B2
CLOUDS(%) 7 4 12 57 55 65 54 34 18 16 18 11 21 28 29 32 23 57 64 72
VSBY 10 10 10 7 7 6 7 10 10 10 10 10 10 10 10 10 10 7 7 6
POP 12HR 5 60 10 0 30
RAIN SHWRS SC SC SC SC SC SC NM
TSTMS IS IS IS IS
MIX HGT 3 4 6 <1 <1 <1 <1 1 4 6 6 <1 <1 <1 <1 <1 4 7 5 <1
T WIND DIR W W W SW W NW NW NW NW NW NW W SW SW S S SW SW SW S
T WIND SPD 19 21 25 8 14 18 13 19 18 14 12 3 3 3 3 2 12 16 16 6
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 91116 95 4 7 8 6 26 95112 90 2 2 2 2 2 62117 96 3
MAX LVORI 1 1 1 2 3 4 6 4 1 1 1 2 3 4 4 4 1 1 1 2
STABILITY B B C F F F F A A A A G G G G A A B B F
CEILING None 6100 None None None None None None 11700
STA PRES 27.22 27.22 27.23 27.28 27.25 27.25 27.23 27.22 27.16
Date Sun 04/19/26Mon 04/20/26Tue 04/21/26Wed 04/22/26
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 41 57 32 57 31 69 44 72
TEMP 60 45 55 48 38 35 55 48 34 36 67 60 47 48 69 63
DEWPT 52 41 29 24 23 20 19 19 21 22 30 31 33 35 38 38
RH 75 86 37 39 54 54 24 31 58 56 25 33 58 60 32 39
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B1 SC FW CL CL FW CL CL FW SC FW SC SC SC
POP 12HR 70 40 10 5 0 0 5 20
RAIN SHWRS NM NM SC IS IS
TSTMS 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