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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
802 AM EDT Sun Apr 19 2026
NCZ006-192000-
RAWS 310801
36.37N 79.29W Elev. 580 ft
802 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 68 41 66 35 68
TEMP 55 63 66 59 47 44 41 43 59 64 65 54 45 40 35 39 55 65 68 63
DEWPT 41 34 28 24 23 24 25 29 34 30 25 22 21 22 22 24 25 27 29 32
MAX/MIN RH 23 58 22 59 22
RH 59 34 24 26 38 45 52 57 39 28 22 28 38 48 59 54 31 24 23 31
WIND DIR NW NW NW N NW SW SW W NW NW NW N N N NE NE E SW S S
WIND SPD 10 8 9 4 2 2 2 3 6 9 9 4 3 2 2 2 2 2 4 3
WIND GUST 23 20 19
CLOUDS OV B1 SC CL CL FW CL FW FW FW FW CL CL CL FW FW CL FW FW FW
CLOUDS(%) 91 69 35 5 5 7 5 17 20 17 7 5 4 5 6 7 3 10 8 17
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 50 0 0 0 0
RAIN SHWRS IS
MIX HGT 3 5 7 <1 <1 <1 <1 <1 6 7 8 <1 <1 <1 <1 1 4 5 5 <1
T WIND DIR N NW NW NW NW SW SW W NW W NW N N N N E N SW SW S
T WIND SPD 20 20 20 10 3 3 5 5 11 20 19 9 10 5 3 5 3 5 14 6
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 61125155 5 2 2 3 6 74149165 4 5 3 2 9 18 38 93 3
MAX LVORI 1 1 1 2 2 2 2 2 1 1 1 2 2 2 3 2 2 1 1 2
STABILITY C B B F G G G A B B B F G G G A A A A G
CEILING 1800 None None None None None None None None None
STA PRES 29.42 29.43 29.53 29.52 29.56 29.54 29.64 29.68 29.70 29.55
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 49 83 53 84 57 88 60 86
TEMP 53 53 81 75 59 57 82 76 62 60 85 79 65 63 84 76
DEWPT 33 37 42 41 47 49 47 48 46 50 48 47 49 51 53 55
RH 46 54 25 29 64 75 29 37 56 69 28 32 56 65 34 48
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW SC SC SC FW FW CL FW SC FW FW SC SC SC SC B1
POP 12HR 0 5 5 5 0 5 10 40
RAIN SHWRS 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