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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
731 PM EST Sat Dec 21 2024
NCZ001-220900-
RAWS 310142
36.40N 81.46W Elev. 4608 ft
731 PM EST Sat Dec 21 2024
Date 12/21/24 Sun 12/22/24 Mon 12/23/24 Tue
UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12
EST 3hrly 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07
MIN/MAX TEMP 14 30 20 34 24
TEMP 17 15 15 14 20 27 28 21 21 20 20 20 27 33 31 25 24 26 29 32
DEWPT 11 10 8 5 4 4 7 10 10 10 11 11 13 15 17 16 16 15 15 17
MIN/MAX RH 82 36 67 47 71
RH 77 80 73 67 49 37 40 62 62 64 67 67 55 47 56 68 71 62 55 53
WIND DIR NW NW NW NW NW W SW S S S S S S S S S SW W W W
WIND SPD 10 8 6 6 3 3 3 3 4 4 5 5 5 6 6 5 5 8 10 12
CLOUDS SC FW FW CL CL CL CL FW FW CL CL CL CL FW CL CL CL FW FW SC
CLOUDS(%) 26 15 8 5 3 5 1 21 7 5 3 2 3 8 1 3 3 6 20 29
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 0 0 0 5
SNOWSHWRS
LAL 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
HAINES 4 4 4 4 4 4 3 3 2 2 3 3 3 3 4 4
MIX HGT <1 <1 <1 <1 <1 2 2 <1 <1 <1 <1 <1 <1 1 <1 <1
T WIND DIR NW NW NW NW NW NW W E S S S S S S S S
T WIND SPD 13 10 5 5 5 6 2 1 3 4 4 4 5 6 6 4
DISPERSION FR PR PR VP VP VP PR PR PR PR FR
ADI 12 7 4 4 7 19 5 1 2 2 2 4 4 10 5 2
MAX LVORI 4 4 3 3 2 2 2 3 3 3 3 3 3 2 2 3
STABILITY D E E C B B B G F F F C C C C F
CEILING None None None None None None None None None
STA PRES 26.80 26.83 26.88 26.88 26.94 26.95 26.96 26.92
Date 12/24Wed 12/25/24Thu 12/26/24Fri 12/27/24Sat 12/28/24
UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
EST 6hrly 13 19 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19
MAX/MIN TEMP 43 32 42 34 43 36 41 39 46
TEMP 43 34 34 32 42 36 36 34 41 38 37 36 39 39 39 40 44 43
DEWPT 28 29 29 28 35 33 33 33 38 36 35 35 38 36 36 35 39 38
RH 55 82 82 85 76 89 89 96 89 92 92 96 96 89 89 82 82 82
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC SC SC B1 B1 B2 B1 B1 SC B1 B2 B2 B2 B2 B1 B1 B1
POP 12HR 5 5 20 30 20 30 50 50 40
RAIN SHWRS IS IS SC IS IS SC SC SC SC SC SC SC
SNOWSHWRS 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
LAL(CATEGORY).......................Lightning Activity Level
HAINES(CATEGORY)....................Haines Index
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
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