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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1102 AM EDT Fri Apr 17 2026
VAZ018-172000-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
1102 AM EDT Fri Apr 17 2026
Date Fri 04/17/26 Sat 04/18/26 Sun 04/19/26
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 80 58 88 49 57
TEMP 77 79 71 65 62 58 60 77 85 87 78 70 66 56 49 53 56 57 50
DEWPT 48 46 46 45 45 46 49 52 51 53 55 56 55 50 41 36 29 23 21
MAX/MIN RH 31 66 30 80 27
RH 36 31 41 48 54 64 67 42 31 31 45 61 68 80 74 52 35 27 31
WIND DIR NW NW NW NW NW W W S S SW SW W W NW NW NW NW NW NW
WIND SPD 9 8 2 1 1 1 1 3 6 6 4 5 6 10 16 14 13 12 10
WIND GUST 16 19 20 17 20 23 32 41 40 35 35 33
CLOUDS CL CL FW FW SC FW FW SC SC B1 B2 B2 B2 B2 B2 B2 SC SC CL
CLOUDS(%) 3 1 8 7 40 25 15 34 50 57 78 78 80 84 84 73 50 50 4
VSBY 10 10 10 10 9 10 10 10 10 9 9 9 10 10 10 9 9 9 9
POP 12HR 0 0 20 70 50
RAIN SHWRS IS IS NM NM NM NM SC SC SC SC
TSTMS IS IS
MIX HGT 6 6 <1 <1 <1 <1 <1 3 7 7 <1 <1 <1 2 2 3 6 7 3
T WIND DIR NW NW NW W NW W W SW SW SW S SW W NW NW NW NW NW NW
T WIND SPD 19 14 3 3 2 2 1 12 13 18 11 17 17 23 28 29 34 32 28
DISPERSION VP VP VP VP VP PR PR FR FR
ADI 139116 2 2 1 1 1 50107 89 8 12 12 31 59 77155149 19
MAX LVORI 1 1 2 2 2 3 3 1 1 1 2 2 3 3 3 1 1 1 2
STABILITY B A G G G G A A B C E E E D D D C C E
CEILING None None None None 8300 3600 1900 7100 None
STA PRES 27.77 27.79 27.78 27.76 27.65 27.62 27.65 27.75 27.79
Date Mon 04/20/26Tue 04/21/26Wed 04/22/26Thu 04/23/26
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 38 58 35 71 50 77 52 79
TEMP 42 40 56 50 38 39 67 63 51 52 75 68 56 55 76 70
DEWPT 24 23 23 20 21 23 30 32 35 38 41 39 40 44 47 45
RH 48 50 27 30 50 52 25 31 54 59 29 34 55 66 36 41
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW FW CL CL FW FW FW FW SC SC SC FW FW SC
POP 12HR 5 0 0 0 0 10 10 20
RAIN SHWRS IS
TSTMS 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