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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
132 PM EDT Fri Apr 17 2026
NCZ003-172000-
RAWS 310301
36.48N 80.86W Elev. 1300 ft
132 PM EDT Fri Apr 17 2026
Date Fri 04/17/26 Sat 04/18/26 Sun 04/19/26
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 83 56 88 51 60
TEMP 81 83 74 65 61 59 60 77 85 87 81 72 67 60 51 56 59 60 55
DEWPT 51 49 49 49 49 47 49 54 54 56 57 56 55 52 44 40 32 27 25
MAX/MIN RH 31 69 32 79 28
RH 35 31 41 56 65 64 67 45 35 35 44 57 65 75 77 55 36 28 31
WIND DIR W NW NW NW NW N N S SW SW SW SW W NW NW NW NW NW NW
WIND SPD 5 5 1 1 1 0 0 2 6 6 3 2 2 6 11 13 12 11 8
WIND GUST 17 13 19 29 32 27 26 24
CLOUDS FW SC FW FW SC SC SC FW SC B1 B1 B1 B2 B2 B2 B2 B1 B1 CL
CLOUDS(%) 17 49 12 13 30 33 26 21 32 54 60 64 71 85 87 81 53 53 4
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 0 10 50 50
RAIN SHWRS SC SC SC SC SC SC SC SC
TSTMS IS IS
MIX HGT 8 7 <1 <1 <1 <1 <1 4 7 7 1 <1 <1 2 3 3 6 7 1
T WIND DIR NW NW NW NW N N N SW SW SW SW SW W NW NW NW NW NW NW
T WIND SPD 17 13 3 2 3 3 2 11 14 17 10 8 6 17 32 34 32 27 18
DISPERSION VP VP VP VP VP VP VP PR PR
ADI 155119 2 1 2 2 2 52114 81 5 4 3 12 72118146130 12
MAX LVORI 1 1 2 2 3 3 3 1 1 1 2 3 3 4 3 1 1 1 2
STABILITY A A G G G G A A B C F F F E D C C C E
CEILING None None None None None 5200 2500 6600 None
STA PRES 28.10 28.12 28.11 28.11 28.02 27.98 27.98 28.08 28.13
Date Mon 04/20/26Tue 04/21/26Wed 04/22/26Thu 04/23/26
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 38 66 35 72 46 80 50 81
TEMP 42 41 63 59 41 41 68 65 50 51 77 71 55 55 78 73
DEWPT 25 25 26 26 27 25 33 36 36 35 39 41 41 44 48 48
RH 50 52 24 28 57 52 27 34 58 54 25 34 59 66 35 41
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS CL FW FW FW CL FW FW SC FW FW SC SC SC FW FW SC
POP 12HR 5 0 0 0 0 5 5 10
$$
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