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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 AM EDT Sat Apr 18 2026
NCZ003-190800-
RAWS 310302
36.35N 80.48W Elev. 1076 ft
231 AM EDT Sat Apr 18 2026
Date 04/17/26 Sat 04/18/26 Sun 04/19/26 Mon
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 58 87 51 64 41
TEMP 59 61 77 84 86 81 75 69 61 54 54 60 62 57 50 44 42 44
DEWPT 48 49 54 54 53 54 55 57 51 41 36 30 25 24 25 26 28 29
MIN/MAX RH 68 32 71 24 58
RH 67 65 45 36 32 39 50 66 70 61 50 32 24 28 37 49 57 55
WIND DIR NE E SW SW SW S SW W NW NW NW NW NW NW NW W W NW
WIND SPD 2 2 4 9 10 9 8 6 12 18 12 10 11 10 5 4 5 5
WIND GUST 31 26 21
CLOUDS SC FW FW SC SC SC B1 B1 B2 OV B2 B1 SC CL CL CL FW FW
CLOUDS(%) 45 23 25 44 35 43 62 65 79 91 82 56 28 3 3 5 6 19
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 5 40 30 0
RAIN SHWRS IS IS IS SC SC
MIX HGT <1 <1 3 7 8 <1 <1 <1 2 2 3 6 7 <1
T WIND DIR N N SW SW SW SW SW W NW NW NW NW NW NW
T WIND SPD 2 1 14 16 17 5 5 8 17 25 23 24 20 11
DISPERSION VP PR PR PR FR FR PR VP PR
ADI 1 1 59122139 5 5 5 19 53 56156 96 8
MAX LVORI 3 3 1 1 1 2 2 3 3 1 1 1 1 2
STABILITY G A A B B D D E D D D B C E
CEILING None None None None 2500 5100 None None
STA PRES 28.91 28.91 28.83 28.80 28.83 29.00 29.02
Date 04/20Tue 04/21/26Wed 04/22/26Thu 04/23/26Fri 04/24/26
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 64 36 67 47 81 52 81 55 85
TEMP 62 57 40 40 63 63 50 50 78 73 57 56 79 74 60 58 83 77
DEWPT 28 23 22 20 26 31 33 34 40 42 44 46 48 48 48 48 47 48
RH 27 27 48 44 24 30 52 54 26 33 62 69 34 40 64 69 28 36
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW CL CL FW FW FW SC SC FW FW FW FW FW SC FW FW SC
POP 12HR 0 0 0 0 5 0 5 0 5
$$
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