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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 PM EDT Wed Apr 15 2026
VAZ018-160800-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
801 PM EDT Wed Apr 15 2026
Date 04/15/26 Thu 04/16/26 Fri 04/17/26 Sat
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 61 86 61 82 58
TEMP 72 68 65 65 75 81 85 75 69 65 62 63 73 80 82 73 64 59 58 60
DEWPT 46 46 47 49 49 48 47 47 49 54 55 55 54 50 48 48 48 47 47 49
MIN/MAX RH 62 26 80 31 70
RH 39 45 52 56 40 32 27 37 49 68 78 75 51 35 31 41 56 64 67 67
WIND DIR W W W W W SW SW W W W W W NW NW W NW W W W SW
WIND SPD 6 6 6 8 10 10 11 9 8 5 5 5 6 6 5 2 1 1 1 1
WIND GUST 20 19 20 19 21 21 19 17
CLOUDS SC B1 B1 SC FW FW SC SC B2 B1 B1 SC FW FW FW FW FW SC SC SC
CLOUDS(%) 37 63 55 30 13 14 28 26 71 65 60 44 25 18 12 17 15 32 35 37
VSBY 10 10 10 10 10 10 10 9 9 9 9 10 9 10 9 10 9 10 9 10
POP 12HR 0 20 40 20 0
RAIN SHWRS SC SC IS IS IS
MIX HGT <1 <1 <1 <1 4 6 7 <1 <1 <1 <1 <1 4 7 5 <1
T WIND DIR SW W W W W W SW SW W W NW W NW NW NW NW
T WIND SPD 5 4 5 4 9 14 17 12 18 11 13 13 26 20 16 12
DISPERSION PR PR PR PR PR PR PR VP VP VP VP
ADI 3 3 4 5 38104 82 11 16 8 9 16126148102 6
MAX LVORI 2 2 2 3 1 1 1 2 2 3 4 3 1 1 1 2
STABILITY F E E B B B C D D E E A B B A G
CEILING None None None None 15800 1400 None None None
STA PRES 27.81 27.79 27.79 27.70 27.72 27.73 27.77 27.75
Date 04/18Sun 04/19/26Mon 04/20/26Tue 04/21/26Wed 04/22/26
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 87 49 64 37 60 37 73 49 76
TEMP 86 78 64 53 63 55 42 39 56 51 39 40 69 63 53 52 73 67
DEWPT 52 52 52 45 33 27 23 20 19 19 21 24 32 34 35 39 42 40
RH 31 40 65 74 32 34 46 46 23 28 48 52 25 34 50 61 33 37
WIND SPD <15 <15 15> <15 <15 <15 <15 <15 <15
AVG CLOUDS SC B1 B2 B1 B2 B1 FW FW FW FW CL CL FW SC FW FW FW SC
POP 12HR 20 60 40 10 5 0 0 5 10
RAIN SHWRS IS NM SC SC 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