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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
201 PM EDT Mon Apr 20 2026
VAZ012-210800-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
201 PM EDT Mon Apr 20 2026
Date 04/20/26 Tue 04/21/26 Wed 04/22/26 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 25 71 45 75 45
TEMP 55 46 38 34 30 33 52 69 71 60 52 48 48 50 69 74 74 64 55 50 47 50
DEWPT 20 17 18 18 17 19 23 29 34 38 39 39 39 39 40 39 38 39 40 41 40 43
MIN/MAX RH 70 22 71 26 84
RH 25 31 44 51 58 56 32 22 26 44 61 71 71 66 35 28 27 40 57 71 76 77
WIND DIR NW NW N N SW S SW W W SW SW W W W W W W W W W W W
WIND SPD 10 5 2 1 1 2 3 5 6 5 4 5 6 8 10 11 9 5 3 2 2 3
CLOUDS CL CL CL CL FW FW CL FW FW SC SC FW SC SC SC SC FW FW FW FW FW FW
CLOUDS(%) 4 4 4 4 6 7 4 19 25 47 34 19 34 39 39 38 24 24 15 9 10 6
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 0 0 10 5
MIX HGT 5 <1 <1 <1 <1 <1 3 5 5 <1 <1 <1 <1 <1 5 7 8 <1
T WIND DIR NW NW NW SW SW S W W W SW SW W W W W W NW W
T WIND SPD 19 11 2 1 2 3 8 11 16 9 9 10 11 13 44 37 24 6
DISPERSION PR VP VP VP PR VP PR PR PR VP VP VP
ADI 122 5 1 1 1 3 28 76 99 6 4 5 5 14200181195 3
MAX LVORI 1 2 2 2 3 3 2 1 1 2 3 3 3 2 1 1 1 2
STABILITY B F G G G A A A B E F F F B B C B F
CEILING None None None None None None None None None None
STA PRES 27.41 27.45 27.47 27.48 27.38 27.35 27.31 27.31 27.29
Date 04/23Fri 04/24/26Sat 04/25/26Sun 04/26/26Mon 04/27/26
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 79 47 78 53 75 50 73 51 70
TEMP 76 67 52 53 78 68 55 55 72 66 54 53 71 65 55 52 67 64
DEWPT 43 44 44 45 43 45 46 48 51 52 50 50 48 48 49 49 51 51
RH 31 43 74 74 29 43 72 77 48 61 86 89 44 54 80 89 56 63
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW FW SC SC SC B1 B1 B2 B1 B1 B1 B1 B1 B1 B2 B2
POP 12HR 5 5 10 30 70 50 50 40 60
RAIN SHWRS SC SC NM SC SC SC SC SC SC SC NM
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