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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
731 AM EDT Sun Apr 19 2026
NCZ003-192000-
RAWS 310301
36.48N 80.86W Elev. 1300 ft
731 AM EDT Sun Apr 19 2026
Date Sun 04/19/26 Mon 04/20/26 Tue 04/21/26
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 62 39 63 33 69
TEMP 45 51 60 61 55 47 44 41 43 55 60 62 55 43 36 34 37 55 65 69 64
DEWPT 37 34 27 24 24 24 26 27 29 32 29 24 23 24 22 21 22 28 32 36 38
MAX/MIN RH 24 62 23 59 29
RH 73 52 28 24 30 40 49 57 57 41 31 23 29 47 56 58 54 35 29 30 38
WIND DIR NW NW NW NW NW SW SW W NW NW NW NW NW N N NW N S S S S
WIND SPD 17 14 12 10 4 2 2 2 2 6 10 8 3 1 1 1 0 1 3 4 2
WIND GUST 40 34 25 23 16 18 20 19
CLOUDS OV B1 FW FW FW CL FW FW FW SC FW CL CL CL FW FW CL CL FW FW FW
CLOUDS(%) 89 66 20 6 6 4 6 9 25 28 7 4 4 4 6 6 5 4 10 19 15
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 30 0 0 0 0
RAIN SHWRS SC
MIX HGT 2 3 6 6 1 <1 <1 <1 1 5 7 7 1 <1 <1 <1 1 4 5 5 <1
T WIND DIR NW NW NW NW NW W SW W NW NW W NW NW N N NW N SW SW SW SW
T WIND SPD 35 34 29 26 16 3 3 4 4 12 20 20 14 9 3 3 0 3 9 14 11
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 68117132180 7 2 2 2 9 79152149 7 4 2 2 0 16 59 96 5
MAX LVORI 3 1 1 1 2 2 2 3 2 1 1 1 2 2 3 3 2 2 1 1 2
STABILITY D C C B F G G G A B B B G G G G A A A A G
CEILING None None None None None None None None None None
STA PRES 28.13 28.17 28.24 28.23 28.27 28.27 28.34 28.37 28.37 28.26
Date Wed 04/22/26Thu 04/23/26Fri 04/24/26Sat 04/25/26
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 45 79 50 82 52 84 55 81
TEMP 49 51 78 72 55 54 80 73 58 57 81 75 60 59 78 73
DEWPT 37 39 42 42 46 46 48 48 46 46 48 49 48 49 53 55
RH 63 63 28 34 72 74 33 41 64 67 32 40 64 69 42 53
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW SC SC FW FW FW CL FW FW FW FW SC SC SC B1 B2
POP 12HR 0 5 5 5 0 10 20 60
RAIN SHWRS IS SC NM
TSTMS SC
$$
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