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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
931 PM EDT Mon Apr 20 2026
NCZ003-210800-
RAWS 310302
36.35N 80.48W Elev. 1076 ft
931 PM EDT Mon Apr 20 2026
Date 04/20/26 Tue 04/21/26 Wed 04/22/26 Thu
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 31 69 44 81 50
TEMP 47 40 37 38 53 63 68 62 56 50 46 49 69 77 79 71 61 55 52 55
DEWPT 23 20 20 21 23 27 31 34 36 36 37 38 42 41 38 40 42 42 42 44
MIN/MAX RH 59 25 74 23 70
RH 38 44 50 50 31 25 25 35 47 58 71 66 37 28 23 32 49 61 69 66
WIND DIR N NE NE NE SE SW SW S SW SW SW SW W W W W NW NW NW NW
WIND SPD 4 4 4 3 3 4 6 5 5 4 4 4 8 10 10 6 5 4 4 4
WIND GUST 20
CLOUDS CL CL CL CL CL FW SC SC SC SC FW SC FW FW FW FW FW FW FW FW
CLOUDS(%) 4 5 4 5 4 9 26 38 43 45 25 27 12 13 16 21 14 10 7 11
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 0 0 10 5
MIX HGT <1 <1 <1 <1 3 4 4 <1 <1 <1 <1 <1 5 9 10 <1
T WIND DIR N N N NE SW SW SW SW SW SW SW SW W W NW N
T WIND SPD 3 3 3 2 3 8 11 8 6 4 3 4 29 26 20 6
DISPERSION VP VP VP PR PR VP VP PR PR VP VP
ADI 2 2 2 2 15 42 55 4 5 3 2 4175200191 3
MAX LVORI 2 2 2 2 2 1 1 2 2 3 3 3 1 1 1 2
STABILITY F F F A A A B F E E F A B B B F
CEILING None None None None None None None None
STA PRES 29.27 29.30 29.16 29.10 29.05 29.03 28.98
Date 04/23Fri 04/24/26Sat 04/25/26Sun 04/26/26Mon 04/27/26
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 83 54 83 58 81 57 77 56 71
TEMP 79 75 61 58 80 75 63 60 78 74 61 59 74 71 60 57 67 68
DEWPT 46 48 47 47 46 47 48 50 53 55 55 54 54 53 55 53 56 56
RH 31 38 60 67 30 37 58 69 42 51 81 83 50 53 84 86 68 65
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW SC FW FW FW B1 SC SC SC B1 B1 B1 B1 B1 B1 B1 B2 B2
POP 12HR 5 5 5 10 50 40 40 40 50
RAIN SHWRS IS SC SC SC SC SC SC SC SC SC
TSTMS 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