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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
331 AM EDT Sun Apr 19 2026
VAZ012-192000-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
331 AM EDT Sun Apr 19 2026
Date Sun 04/19/26 Mon 04/20/26 Tue 04/21/26
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 56 36 54 27 69
TEMP 42 40 49 54 55 48 43 41 38 38 48 52 54 47 36 30 28 33 57 66 68 61
DEWPT 39 34 30 20 18 19 22 24 27 28 25 20 17 17 20 19 18 20 26 30 34 35
MAX/MIN RH 22 70 23 68 26
RH 89 79 48 26 23 31 43 50 64 67 40 28 23 30 52 63 66 58 30 26 28 38
WIND DIR NW NW NW NW NW NW W W NW NW NW NW NW NW NW W W SW W W W SW
WIND SPD 8 10 10 9 8 4 3 3 4 5 6 6 5 3 2 1 1 1 2 3 3 3
WIND GUST 19 21 20 18 17 17 16
CLOUDS OV OV SC FW CL CL CL FW SC SC FW FW CL CL CL CL FW CL CL SC SC SC
CLOUDS(%) 91 90 47 19 4 5 4 8 27 37 17 10 5 4 4 5 6 4 5 26 33 31
VSBY 9 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 10 0 5 0 0
RAIN SHWRS O
MIX HGT 2 2 3 5 6 <1 <1 <1 <1 2 3 5 5 <1 <1 <1 <1 <1 3 5 5 <1
T WIND DIR NW NW NW NW NW NW W W W NW NW NW NW NW NW W W SW W W W SW
T WIND SPD 31 27 33 36 26 10 5 9 8 17 21 21 20 11 5 2 2 4 6 12 17 9
DISPERSION PR VP VP VP VP VP VP VP VP VP
ADI 35 69140200169 5 3 4 4 38 89129131 5 3 1 1 4 29 81114 4
MAX LVORI 4 3 1 1 1 2 2 2 3 3 1 1 1 2 2 3 3 3 2 1 1 2
STABILITY D C B B B F G G F A B B A G G G G A A A A G
CEILING None None None None None None None None None None
STA PRES 27.28 27.29 27.33 27.32 27.38 27.39 27.44 27.44 27.44 27.33
Date Wed 04/22/26Thu 04/23/26Fri 04/24/26Sat 04/25/26
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 45 74 47 77 49 80 52 75
TEMP 48 51 72 65 51 51 75 68 52 54 78 69 55 56 73 65
DEWPT 37 38 39 39 43 45 44 43 43 44 43 45 46 47 50 49
RH 65 61 30 38 74 80 33 40 71 69 29 42 72 72 44 56
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW SC SC SC FW FW FW FW FW FW FW SC SC B1 B1 B2
POP 12HR 0 20 10 10 0 20 30 70
RAIN SHWRS IS IS IS SC SC NM
TSTMS SC
$$
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