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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
101 AM EDT Sun Apr 19 2026
NCZ003-200800-
RAWS 310302
36.35N 80.48W Elev. 1076 ft
101 AM EDT Sun Apr 19 2026
Date 04/18/26 Sun 04/19/26 Mon 04/20/26 Tue
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 53 63 41 63 36
TEMP 71 63 55 54 61 62 57 50 46 42 45 56 60 62 57 46 39 36 39
DEWPT 57 48 40 35 25 21 23 23 26 27 28 30 28 20 20 23 22 21 19
MIN/MAX RH 65 20 55 19 53
RH 61 58 57 48 25 20 27 34 45 55 51 37 29 20 23 40 50 54 44
WIND DIR W NW NW NW NW NW NW NW W W NW NW NW NW NW N N N NE
WIND SPD 5 14 19 12 14 12 8 3 3 4 5 9 10 11 9 6 5 4 3
WIND GUST 34 26 25 23 21
CLOUDS B1 B2 OV B2 B1 FW CL CL CL CL FW FW FW FW CL CL CL CL FW
CLOUDS(%) 62 84 96 82 55 12 5 5 3 4 24 23 23 10 3 2 4 4 6
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 20 20 0 0 0
RAIN SHWRS IS
TSTMS
MIX HGT <1 2 2 3 5 6 <1 <1 <1 <1 <1 6 7 8 <1
T WIND DIR SW NW NW NW NW NW NW W SW SW W W W NW NW
T WIND SPD 4 27 25 24 24 21 11 2 3 3 4 17 12 17 11
DISPERSION PR GD PR VP VP VP PR PR PR VP
ADI 3 31 47 80104 99 8 1 2 2 4117 97 84 8
MAX LVORI 3 1 1 1 1 1 2 2 2 3 2 1 1 1 2
STABILITY E D D C C C E G G F A B B C E
CEILING 2400 5100 None None None None None None
STA PRES 28.83 28.96 29.01 29.11 29.12 29.13 29.11
Date 04/21Wed 04/22/26Thu 04/23/26Fri 04/24/26Sat 04/25/26
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 67 45 80 51 81 55 84 58 82
TEMP 63 63 50 50 77 73 56 55 78 74 59 58 81 75 62 60 80 75
DEWPT 28 33 33 34 39 40 44 47 48 47 47 46 48 48 49 50 52 52
RH 26 32 52 54 25 30 64 74 35 38 64 64 32 38 62 69 38 45
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW SC SC SC SC FW FW FW SC FW FW FW SC SC SC B1 B1
POP 12HR 0 0 5 5 5 0 5 20 40
RAIN SHWRS IS IS SC
TSTMS 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
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