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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 AM EDT Mon Apr 20 2026
NCZ003-210800-
RAWS 310301
36.48N 80.86W Elev. 1300 ft
231 AM EDT Mon Apr 20 2026
Date 04/19/26 Mon 04/20/26 Tue 04/21/26 Wed
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 39 64 33 70 46
TEMP 40 43 56 62 62 55 44 38 35 38 54 65 69 64 54 49 46 51
DEWPT 27 30 34 32 26 23 22 22 21 22 27 32 36 39 38 39 39 41
MIN/MAX RH 64 24 57 28 76
RH 59 60 43 32 25 29 41 52 56 52 35 29 30 40 54 68 76 68
WIND DIR SW NW NW NW NW N N NW NW N S S S SW SW W W W
WIND SPD 1 2 8 10 8 3 1 1 1 0 2 3 4 2 1 1 1 2
WIND GUST 19 23 20
CLOUDS CL FW SC FW FW FW CL CL CL CL CL FW FW FW FW FW FW SC
CLOUDS(%) 5 8 48 14 6 8 4 5 5 5 4 11 14 22 25 23 24 30
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 0 0 0 0
MIX HGT <1 2 6 7 7 <1 <1 <1 <1 <1 3 5 6 <1
T WIND DIR W W NW W NW NW N N NW E SW SW SW S
T WIND SPD 3 3 17 27 23 16 5 3 3 1 4 6 8 8
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 2 9110133175 7 3 2 2 1 20 42 55 4
MAX LVORI 3 3 1 1 1 2 2 2 3 2 2 1 1 2
STABILITY G A B C B G G G G A A A A G
CEILING None None None None None None None None
STA PRES 28.25 28.30 28.29 28.36 28.40 28.41 28.30
Date 04/22Thu 04/23/26Fri 04/24/26Sat 04/25/26Sun 04/26/26
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 80 51 82 53 83 56 81 54 73
TEMP 77 72 56 55 80 74 58 57 82 76 60 59 80 73 59 57 72 69
DEWPT 43 45 45 47 48 49 46 47 47 49 48 50 53 55 53 51 54 53
RH 30 38 66 74 33 41 64 69 29 39 64 72 39 53 80 80 53 57
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW FW FW FW FW FW FW SC SC SC B1 B2 B1 B1 B1 B1
POP 12HR 10 5 10 0 5 20 60 50 50
RAIN SHWRS IS SC NM SC SC SC SC
TSTMS 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