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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1031 AM EDT Wed Jul 17 2024
WVZ043-172000-
RAWS 465401
37.53N 81.00W Elev. 2725 ft
1031 AM EDT Wed Jul 17 2024
Date Wed 07/17/24 Thu 07/18/24 Fri 07/19/24
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 83 66 78 58 80
TEMP 78 82 79 73 70 69 68 69 73 76 75 71 65 62 60 62 72 77 77 73
DEWPT 69 67 68 67 67 67 66 66 65 62 60 59 58 57 56 57 59 57 59 60
MAX/MIN RH 62 100 58 89 50
RH 74 61 69 81 90 93 93 90 76 62 60 66 78 84 87 84 64 50 54 64
WIND DIR SW W W W W W W NW NW NW NW NW NW N N NE E SE SE E
WIND SPD 6 8 9 5 4 4 3 3 5 6 6 4 3 3 2 2 3 3 3 3
CLOUDS SC B1 B1 B2 B2 B2 B2 B2 B1 B2 B1 SC SC SC SC B1 SC SC SC SC
CLOUDS(%) 36 60 69 78 73 72 76 75 68 70 66 48 30 32 37 54 49 46 50 48
VSBY 6 5 4 6 7 3 7 5 9 10 10 7
POP 12HR 50 50 40 5 20
RAIN SHWRS SC SC SC SC SC SC SC SC SC SC IS IS IS
TSTMS IS SC SC SC SC SC SC IS
LAL 2 3 3 3 3 3 1 1 1 3 2 1 1 1 1 1 1 1 1
HAINES 4 4 4 3 3 3 3 3 3 3 3 4 4 4 4 4 4 4 4 4
MIX HGT 4 5 4 2 <1 <1 <1 <1 2 3 4 1 <1 <1 <1 <1 4 6 5 1
T WIND DIR W SW SW W W NW NW NW NW NW NW NW N N N N S SW S SE
T WIND SPD 11 12 12 10 6 9 9 8 9 11 12 12 3 2 1 0 5 5 4 8
DISPERSION PR VP VP VP VP VP VP VP VP
ADI 40 50 48 7 5 6 4 9 22 39 49 8 2 1 1 0 30 40 31 4
MAX LVORI 3 1 1 4 6 6 7 5 3 1 1 3 4 5 6 6 1 1 1 3
STABILITY C C C E E E F B C C C E G G G B A A A F
CEILING 2200 1700 400 200 1900 None None None None
STA PRES 27.58 27.61 27.63 27.69 27.70 27.75 27.77 27.80 27.76
Date Sat 07/20/24Sun 07/21/24Mon 07/22/24Tue 07/23/24
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 63 79 64 81 64 80 64 80
TEMP 66 65 76 72 66 66 79 73 67 66 80 73 68 67 78 73
DEWPT 62 63 66 66 64 65 62 63 64 64 64 65 65 65 66 66
RH 87 93 71 81 93 97 56 71 90 93 58 76 90 93 67 79
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B2 B2 B2 B1 B1 B1 B1 B1 B2 B2 B2 B1 B2 B2 B2
POP 12HR 20 50 20 30 20 50 40 60
RAIN SHWRS IS SC SC IS IS SC IS IS SC SC SC SC SC NM
TSTMS SC IS SC IS IS SC SC IS SC
$$
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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