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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
401 AM EDT Sun Mar 22 2026
NCZ001-222000-
RAWS 310142
36.40N 81.46W Elev. 4608 ft
401 AM EDT Sun Mar 22 2026
Date Sun 03/22/26 Mon 03/23/26 Tue 03/24/26
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 70 51 56 31 49
TEMP 54 55 59 68 70 65 62 60 59 55 51 52 49 43 39 36 33 32 39 45 48 43
DEWPT 52 53 52 49 46 49 51 51 53 52 47 38 30 26 24 22 23 23 20 22 24 26
MAX/MIN RH 42 95 47 70 37
RH 93 93 78 51 42 56 67 72 80 90 86 59 48 51 54 56 66 69 46 40 39 51
WIND DIR W W W W W W W W W NW NW NW NW NW N N N E SE SE S S
WIND SPD 17 17 14 12 14 14 18 26 29 26 21 17 18 18 14 10 9 8 10 9 9 10
CLOUDS SC SC SC FW FW FW FW SC B2 B2 B1 SC FW FW B1 B1 B1 B1 SC SC SC FW
CLOUDS(%) 45 39 26 21 14 23 20 38 75 86 64 35 21 23 61 62 57 54 49 48 31 12
VSBY 10 10 10 10 10 10 10 10 8 6 9 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 5 30 20 0 5
RAIN SHWRS IS IS
MIX HGT <1 <1 2 4 4 <1 <1 <1 1 <1 1 2 3 <1 <1 <1 <1 <1 1 2 2 <1
T WIND DIR W W W W W SW W W W W N NW N N N N NE E SE S S SE
T WIND SPD 10 10 18 16 19 6 10 14 20 19 21 23 25 16 11 6 6 5 5 5 6 6
DISPERSION GD GD GD GD GD GD GD FR PR FR
ADI 9 11 31 60 57 6 9 13 19 25 36 46 55 14 10 6 6 6 10 15 19 5
MAX LVORI 5 5 3 1 1 3 3 3 3 4 4 1 1 2 2 3 3 3 2 2 2 2
STABILITY D D D C D D D D D D D D D D D D D D C C C E
CEILING None None None 0 0 None None None None None
STA PRES 26.62 26.55 26.53 26.51 26.60 26.70 26.79 26.83 26.86 26.82
Date Wed 03/25/26Thu 03/26/26Fri 03/27/26Sat 03/28/26
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 35 55 44 64 53 60 34 47
TEMP 37 38 55 51 47 47 60 60 58 56 57 50 41 36 44 42
DEWPT 25 28 36 39 41 43 48 49 49 49 48 36 34 29 25 22
RH 61 67 49 63 79 86 64 67 72 77 72 58 76 75 47 44
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC B1 B1 B1 SC B1 B1 SC SC SC B1 B2 B2 B1 SC SC
POP 12HR 5 10 20 30 20 40 40 20
RAIN SHWRS IS SC IS IS SC SC SC SC IS 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