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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 PM EDT Wed Mar 18 2026
NCZ003-190800-
RAWS 310301
36.48N 80.86W Elev. 1300 ft
801 PM EDT Wed Mar 18 2026
Date 03/18/26 Thu 03/19/26 Fri 03/20/26 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 32 60 38 68 48
TEMP 35 34 33 34 46 56 60 54 48 44 42 39 55 64 67 61 55 52 50 50
DEWPT 21 22 23 23 30 35 37 40 39 39 39 38 44 44 45 46 45 46 45 47
MIN/MAX RH 66 42 96 44 89
RH 56 61 66 64 53 45 42 59 71 82 89 96 66 48 45 58 69 80 83 89
WIND DIR S S S N SW SW W W NW N N N S S SW SW SW W W W
WIND SPD 1 1 1 1 2 3 4 2 2 0 0 0 1 3 3 2 1 1 1 2
CLOUDS B1 B1 SC B2 B2 B1 B1 SC FW B1 FW FW B1 B1 B2 B2 B1 B1 B1 B2
CLOUDS(%) 59 66 38 85 76 68 57 37 21 52 22 19 57 53 71 72 55 57 56 76
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 0 5 5 10
MIX HGT <1 <1 <1 <1 2 4 4 <1 <1 <1 <1 <1 2 5 6 <1
T WIND DIR S SW SW NW W W W S N NW NW NW SW SW SW S
T WIND SPD 3 4 2 2 11 9 5 2 0 2 3 4 8 13 16 9
DISPERSION VP VP VP VP VP VP VP VP VP VP VP
ADI 2 2 1 2 29 41 22 1 0 1 2 4 19 73112 4
MAX LVORI 3 3 3 3 2 1 2 3 4 5 6 7 3 1 1 3
STABILITY F F F C C B C F F F G A A B B F
CEILING 5800 5800 2200 None None None None 18200 13700
STA PRES 28.31 28.27 28.27 28.21 28.25 28.22 28.22 28.10
Date 03/21Sun 03/22/26Mon 03/23/26Tue 03/24/26Wed 03/25/26
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 74 52 81 52 65 34 57 36 62
TEMP 70 66 56 53 79 72 61 54 62 55 41 36 54 51 42 39 60 56
DEWPT 52 51 49 49 53 53 52 47 40 34 28 24 28 32 32 33 39 38
RH 53 58 77 86 41 51 72 77 44 45 59 61 36 48 67 79 46 51
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 SC FW SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 SC
POP 12HR 5 5 5 20 40 30 10 30 20
RAIN SHWRS IS SC SC SC IS 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