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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 PM EDT Wed Apr 15 2026
NCZ005-160800-
RAWS 310540
36.38N 79.70W Elev. 858 ft
801 PM EDT Wed Apr 15 2026
Date 04/15/26 Thu 04/16/26 Fri 04/17/26 Sat
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 62 89 64 87 60
TEMP 74 69 66 66 77 84 87 81 74 69 65 66 78 85 86 80 69 64 61 63
DEWPT 50 50 51 52 53 51 48 48 51 51 54 56 57 53 50 50 50 51 51 52
MIN/MAX RH 69 26 72 28 72
RH 43 51 58 61 43 32 26 32 44 53 68 70 48 33 29 35 51 63 70 67
WIND DIR SW SW SW SW SW SW SW SW SW W W W NW W W W NW N NW N
WIND SPD 5 4 4 4 6 10 10 6 6 5 4 3 5 5 5 2 2 2 2 2
CLOUDS FW B1 SC SC FW FW CL FW FW SC SC SC FW FW FW FW FW SC FW SC
CLOUDS(%) 25 58 44 35 17 9 4 11 19 35 49 32 22 20 18 18 16 32 24 42
VSBY 10 10 10 10 10 10 10 10 10 10 10 9 10 10 10 10 10 10 10 10
POP 12HR 0 0 10 5 0
MIX HGT <1 <1 <1 <1 4 7 8 <1 <1 <1 <1 <1 4 7 8 <1
T WIND DIR SW SW SW SW SW SW SW SW SW SW W NW NW NW NW NW
T WIND SPD 5 6 4 3 9 17 18 8 8 5 4 12 13 13 13 4
DISPERSION PR VP VP PR PR PR VP VP VP VP VP
ADI 3 5 2 3 45126147 4 4 3 3 12 67122134 2
MAX LVORI 2 2 3 3 1 1 1 2 2 2 3 3 1 1 1 2
STABILITY F E F A B B B F F F E A A A A G
CEILING None None None None None None None None None
STA PRES 29.29 29.27 29.29 29.18 29.19 29.21 29.26 29.20
Date 04/18Sun 04/19/26Mon 04/20/26Tue 04/21/26Wed 04/22/26
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 90 57 72 41 66 39 72 50 81
TEMP 88 85 71 62 70 67 47 43 62 59 44 43 69 66 56 54 78 73
DEWPT 52 53 54 49 40 33 29 26 21 22 24 25 30 32 35 39 41 42
RH 29 33 55 62 33 28 49 51 20 24 45 49 23 28 45 57 27 33
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC B1 B2 B2 B2 FW FW CL FW CL CL FW FW FW FW FW FW
POP 12HR 5 30 30 10 5 0 0 0 5
RAIN SHWRS IS SC SC 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