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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
731 AM EDT Sat Apr 18 2026
VAZ018-182000-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
731 AM EDT Sat Apr 18 2026
Date Sat 04/18/26 Sun 04/19/26 Mon 04/20/26
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 87 46 60 41 56
TEMP 60 77 85 86 75 70 63 51 47 51 57 59 51 47 45 42 42 50 55 55 48
DEWPT 47 51 50 52 54 56 56 45 37 33 26 23 21 22 26 28 28 26 23 21 18
MAX/MIN RH 30 79 24 60 26
RH 62 40 30 31 48 61 78 80 68 50 30 25 30 37 47 57 57 39 29 26 30
WIND DIR SW S SW SW W W NW NW NW NW NW NW NW W W NW NW NW NW NW NW
WIND SPD 1 3 6 6 4 4 6 14 18 14 12 11 8 5 5 6 8 10 10 10 6
WIND GUST 14 19 19 17 18 21 37 44 40 34 32 27 20 20 23 25 31 31 27 21
CLOUDS SC SC SC B1 B2 B2 B2 OV B2 B1 SC FW CL CL FW SC FW FW FW CL CL
CLOUDS(%) 30 50 46 55 77 83 80 89 87 67 42 8 4 4 11 28 25 22 13 5 3
VSBY 10 10 10 10 10 8 9 10 10 10 10 9 9 10 9 9
POP 12HR 20 80 30 10 0
RAIN SHWRS SC NM NM SC SC SC
TSTMS SC IS
MIX HGT <1 3 7 8 <1 <1 1 2 2 4 6 6 2
T WIND DIR N SW SW SW SW W W NW NW NW NW NW NW
T WIND SPD 0 17 16 18 9 16 18 27 31 33 28 31 24
DISPERSION VP VP PR GD PR PR PR PR PR
ADI 0 70119 90 6 11 12 31 63 91126139 16
MAX LVORI 3 1 1 1 2 2 4 4 1 1 1 1 2
STABILITY A A B C E E E D D D C C E
CEILING None 8300 4000 1600 3100 None None
STA PRES 27.74 27.65 27.63 27.68 27.79 27.81
Date Tue 04/21/26Wed 04/22/26Thu 04/23/26Fri 04/24/26
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 33 70 48 77 53 80 55 83
TEMP 35 37 66 60 50 53 75 68 56 55 77 70 57 57 81 72
DEWPT 19 21 26 32 34 38 43 43 45 47 48 46 46 47 47 46
RH 52 52 22 35 54 57 32 40 66 74 36 42 67 69 30 39
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS CL CL FW FW FW FW SC SC FW FW FW FW FW FW FW SC
POP 12HR 0 0 5 20 5 10 5 10
RAIN SHWRS 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