Print This Forecast (Printer-Friendly)
EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 AM EDT Sat Apr 18 2026
NCZ003-190800-
RAWS 310301
36.48N 80.86W Elev. 1300 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 56 87 47 64 40
TEMP 58 60 77 84 86 79 71 66 56 48 53 60 62 56 48 43 41 44
DEWPT 48 49 54 54 55 56 58 58 49 40 35 29 25 25 25 26 28 29
MIN/MAX RH 70 32 79 24 60
RH 69 67 45 36 35 45 63 75 77 74 50 31 24 30 40 51 59 55
WIND DIR N N S SW S SW W NW NW NW NW NW NW NW NW W NW NW
WIND SPD 1 0 2 6 6 2 2 2 9 14 14 12 10 5 2 2 2 2
WIND GUST 12 25 37 34 25 24 18
CLOUDS SC SC SC SC SC B1 B1 B2 B2 OV B2 SC FW CL CL CL FW FW
CLOUDS(%) 41 31 33 36 47 56 65 70 85 89 79 49 16 4 3 5 7 16
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 10 60 20 0
RAIN SHWRS SC SC IS IS IS IS
TSTMS IS IS
MIX HGT <1 <1 4 7 8 <1 <1 <1 2 2 3 6 6 1
T WIND DIR N N SW SW SW SW SW W NW NW NW NW NW NW
T WIND SPD 2 1 17 17 17 9 6 10 28 34 34 29 25 13
DISPERSION VP VP VP VP PR PR VP VP VP
ADI 1 1 78128140 4 3 5 19 73118133175 6
MAX LVORI 3 3 1 1 1 2 3 3 3 1 1 1 1 2
STABILITY G A A B B F F F E D C C B F
CEILING None None None 4200 2500 14400 None None
STA PRES 28.09 28.09 28.01 27.98 28.01 28.14 28.17
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 34 70 45 80 50 82 53 85
TEMP 62 56 38 39 66 64 48 50 78 73 56 55 80 74 58 57 83 77
DEWPT 28 24 23 22 29 35 35 36 42 43 44 46 49 50 47 47 48 48
RH 27 29 54 50 25 34 60 58 28 34 64 72 34 43 67 69 30 36
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW CL CL CL FW SC FW 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