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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
731 AM EDT Fri Apr 17 2026
NCZ003-172000-
RAWS 310302
36.35N 80.48W Elev. 1076 ft
731 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 85 59 88 56 61
TEMP 63 75 82 84 78 68 64 61 62 77 85 87 81 74 70 62 57 57 60 61 55
DEWPT 57 54 51 48 50 50 48 48 50 54 55 54 55 55 54 52 46 40 33 27 24
MAX/MIN RH 29 66 32 71 27
RH 81 48 34 29 37 52 56 62 65 45 36 32 41 51 57 70 67 53 36 27 30
WIND DIR NW NW NW NW W W N NE NE S SW SW SW SW SW NW NW NW NW NW NW
WIND SPD 4 5 5 5 3 3 2 2 2 4 9 10 10 10 8 10 14 12 11 11 12
WIND GUST 20 27 26 23 23
CLOUDS SC CL FW SC FW FW SC SC FW FW SC B1 B1 B1 B2 B2 OV B2 B1 B1 FW
CLOUDS(%) 45 1 6 39 13 15 33 33 24 24 41 52 51 59 70 79 90 84 64 56 6
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 0 5 40 50
RAIN SHWRS IS IS SC SC SC SC SC SC
MIX HGT <1 5 8 7 <1 <1 <1 <1 <1 3 7 8 <1 <1 <1 2 3 3 6 7 <1
T WIND DIR W NW NW NW W NW N N N SW SW SW SW SW SW W NW NW NW NW NW
T WIND SPD 5 16 14 12 2 2 2 2 2 11 14 18 8 6 5 3 26 21 25 23 12
DISPERSION VP VP VP VP FR FR PR FR FR
ADI 6 98137112 1 1 1 1 2 45114 91 7 6 5 4 58 51112107 11
MAX LVORI 4 1 1 1 2 2 3 3 3 1 1 1 2 2 3 3 3 1 1 1 2
STABILITY A A A A G G G G A A B C D D D D D D C C D
CEILING None None None None None None 9100 3600 5000 None
STA PRES 28.97 28.92 28.94 28.93 28.93 28.83 28.79 28.80 28.94 29.00
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 41 66 38 70 48 80 52 81
TEMP 44 44 63 59 43 42 66 65 52 51 77 72 57 56 79 74
DEWPT 25 25 26 25 27 23 29 32 35 34 38 39 41 44 46 46
RH 47 47 24 27 53 46 25 29 52 52 24 30 55 64 31 37
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS CL FW FW FW CL FW FW SC FW SC SC SC FW FW FW FW
POP 12HR 5 0 0 0 0 5 5 10
$$
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