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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1131 PM EDT Thu Apr 18 2024
NCZ018-190800-
RAWS 311941
36.22N 81.63W Elev. 3254 ft
1131 PM EDT Thu Apr 18 2024
Date 04/18/24 Fri 04/19/24 Sat 04/20/24 Sun
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 54 70 49 62 41
TEMP 57 56 57 63 68 68 63 58 55 52 52 57 61 60 54 50 46 44 43
DEWPT 43 44 47 52 54 54 55 55 53 50 46 46 41 38 35 35 34 34 35
MIN/MAX RH 69 58 93 44 72
RH 59 64 69 67 61 61 75 90 93 93 80 67 48 44 48 56 63 68 73
WIND DIR S S SW SW W W W NW NW NW NW NW NW NW NW NW NW NW NW
WIND SPD 3 3 2 5 8 11 10 8 8 9 10 11 13 14 14 11 9 6 3
CLOUDS SC B1 OV OV B2 B1 B1 B1 B1 B1 B2 B1 B1 B1 B1 SC B1 B1 B2
CLOUDS(%) 43 55 88 95 78 67 63 69 60 66 72 59 57 57 55 47 51 65 72
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 20 60 30 10 20
RAIN SHWRS IS SC SC SC SC IS IS IS
TSTMS SC SC
LAL 1 1 1 1 1 3 3 1 1 1 1 1 1 1 1
HAINES 2 2 2 2 2 3 3 3 3 4 4 3 3 2 2
MIX HGT <1 <1 <1 2 4 3 <1 <1 <1 <1 <1 2 4 4 <1
T WIND DIR SW SW SW SW W W W NW N NW NW NW NW NW NW
T WIND SPD 2 2 4 14 13 11 10 13 12 13 13 13 16 14 20
DISPERSION VP VP FR PR PR PR GD FR PR PR
ADI 1 1 5 35 49 39 9 12 11 12 13 37 60 55 19
MAX LVORI 3 3 3 3 1 1 4 5 5 5 4 3 1 1 2
STABILITY F F B C C C D D D D C C C C D
CEILING 17700 3400 1700 700 100 13700 None None
STA PRES 26.89 26.87 26.83 26.85 26.87 26.89 26.89
Date 04/21Mon 04/22/24Tue 04/23/24Wed 04/24/24Thu 04/25/24
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 53 38 56 38 65 48 65 41 63
TEMP 51 48 42 41 53 50 43 43 60 59 52 51 62 57 48 45 59 57
DEWPT 40 38 35 34 37 37 35 37 41 43 44 45 46 42 40 38 40 40
RH 66 68 76 76 54 61 73 79 49 55 74 80 56 57 74 76 49 53
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B2 B1 SC SC FW FW FW FW SC B1 SC SC FW SC SC FW
POP 12HR 30 20 10 0 0 20 20 5 10
RAIN SHWRS IS SC IS IS 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
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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