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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
931 AM EDT Sat May 9 2026
NCZ001-092000-
RAWS 310142
36.40N 81.46W Elev. 4608 ft
931 AM EDT Sat May 9 2026
Date Sat 05/09/26 Sun 05/10/26 Mon 05/11/26
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 64 49 69 51 56
TEMP 54 62 62 57 53 51 50 54 61 67 67 61 57 56 54 52 51 55 52 49
DEWPT 44 43 44 46 47 47 47 48 46 45 45 48 48 48 49 49 48 47 43 38
MAX/MIN RH 49 90 44 89 67
RH 69 50 52 67 80 86 89 80 58 45 45 62 72 74 83 89 89 74 71 66
WIND DIR W W W W W NW NW NW W W W W W NW NW NW NW NW NW NW
WIND SPD 10 13 13 11 10 11 10 9 8 5 8 8 6 8 10 11 9 9 12 16
CLOUDS B1 SC B1 SC FW SC SC FW CL FW FW SC SC B2 B2 B2 B2 B2 B1 SC
CLOUDS(%) 55 29 51 50 20 31 28 11 4 6 8 28 47 75 79 82 81 75 53 33
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 7 7 6 6 7 7 10
POP 12HR 5 0 0 30 70
RAIN SHWRS SC SC NM NM SC SC
TSTMS IS
MIX HGT 4 6 5 1 <1 <1 <1 <1 4 6 6 <1 <1 <1 <1 1 2 2 3 2
T WIND DIR W W W W W W W W W SW SW S S E N N N N N N
T WIND SPD 17 24 25 12 8 8 8 6 11 8 8 9 4 1 1 13 14 13 14 19
DISPERSION FR FR FR FR PR PR PR FR GD
ADI 67105106 8 5 5 5 7 53 61 51 6 3 1 1 20 30 34 36 26
MAX LVORI 1 1 1 3 4 5 6 4 1 1 1 3 3 4 5 4 4 3 3 3
STABILITY C C C E E E E B B A B E E D D D C C D D
CEILING None None None None None None 400 400 None
STA PRES 26.55 26.63 26.66 26.71 26.67 26.64 26.54 26.61 26.66
Date Tue 05/12/26Wed 05/13/26Thu 05/14/26Fri 05/15/26
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 59 45 61 47 63 44 68
TEMP 40 41 56 53 46 48 58 56 50 48 57 54 46 47 62 59
DEWPT 34 33 33 37 36 39 44 46 45 44 41 40 40 41 43 45
RH 79 73 42 54 68 71 59 69 83 86 55 59 79 79 50 60
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW CL CL FW FW B1 B1 B1 SC SC FW FW SC FW SC
POP 12HR 5 0 10 40 30 5 5 10
RAIN SHWRS SC SC SC
TSTMS 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