Print This Forecast (Printer-Friendly)
EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
631 AM EDT Tue Apr 21 2026
NCZ003-212000-
RAWS 310301
36.48N 80.86W Elev. 1300 ft
631 AM EDT Tue Apr 21 2026
Date Tue 04/21/26 Wed 04/22/26 Thu 04/23/26
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 69 45 80 50 81
TEMP 38 53 64 68 63 54 51 48 50 72 78 79 73 61 55 51 55 73 79 80 74
DEWPT 20 25 29 34 37 38 38 39 41 42 40 41 44 44 44 44 46 49 49 48 49
MAX/MIN RH 27 75 25 77 32
RH 48 33 27 28 38 54 61 71 71 34 26 26 35 53 66 77 72 43 35 33 41
WIND DIR N S S S S SW NW NW W W W W W W NW NW NW NW W W W
WIND SPD 0 1 3 5 2 1 1 1 1 5 9 8 2 2 1 2 1 2 3 3 2
WIND GUST 16 19 19 12
CLOUDS CL CL FW FW SC SC SC FW FW FW SC SC FW FW FW FW FW FW SC SC SC
CLOUDS(%) 4 3 7 21 40 41 31 10 18 17 27 27 18 18 12 7 15 15 32 32 27
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 0 10
MIX HGT 1 3 4 4 <1 <1 <1 <1 <1 6 8 9 <1 <1 <1 <1 <1 6 9 9 <1
T WIND DIR E S SW SW S SW SW W W W W W NW W NW NW NW NW NW W NW
T WIND SPD 3 4 5 11 9 5 2 2 4 32 25 21 6 3 4 5 6 14 8 8 3
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 5 19 31 63 4 3 1 1 4200200189 3 2 2 3 7115 83 80 2
MAX LVORI 2 2 1 1 2 3 3 3 3 1 1 1 2 2 3 4 3 1 1 1 2
STABILITY A A A A G F G G A A B B G G G G A A A A G
CEILING None None None None None None None None None None
STA PRES 28.43 28.32 28.28 28.23 28.21 28.15 28.16 28.15 28.16 28.09
Date Fri 04/24/26Sat 04/25/26Sun 04/26/26Mon 04/27/26
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 52 83 55 80 52 73 48 71
TEMP 58 56 80 75 59 59 75 71 60 55 70 67 54 51 69 66
DEWPT 47 46 47 50 49 49 56 57 54 52 52 49 47 46 51 51
RH 67 69 31 41 69 69 52 61 81 90 53 52 77 83 53 58
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC FW SC SC SC SC B1 B2 B2 B1 B1 B1 SC SC B1 B1
POP 12HR 5 5 20 70 50 30 20 40
RAIN SHWRS IS SC NM SC SC SC SC IS IS SC SC
TSTMS SC IS IS 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