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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1031 AM EDT Wed Jul 17 2024
VAZ012-172000-
RAWS 447502
37.01N 81.18W Elev. 2540 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 88 63 80 55 82
TEMP 81 85 82 73 69 66 65 69 77 78 76 71 64 60 56 62 76 78 78 72
DEWPT 69 68 67 68 67 66 65 66 66 64 62 60 58 57 55 58 59 59 60 62
MAX/MIN RH 55 100 60 95 52
RH 67 57 61 84 93100100 90 69 62 62 68 81 90 96 87 56 52 54 71
WIND DIR W W W W W W W NW NW NW NW NW NW N N NE E SE SE SE
WIND SPD 8 6 6 4 3 3 3 3 3 3 3 3 2 2 1 1 2 2 2 2
CLOUDS B1 SC B2 B2 B2 B2 B1 B2 B2 B2 B2 B1 SC SC SC SC B1 B1 B1 B1
CLOUDS(%) 51 49 77 75 75 72 68 72 76 79 71 54 36 38 38 47 56 60 63 57
VSBY 7 4 3 4 8 5 6 7 9 10 10 7
POP 12HR 60 50 50 10 30
RAIN SHWRS IS SC NM SC SC SC SC SC SC SC SC SC SC IS
TSTMS SC NM SC SC SC SC SC IS IS
Obvis PF
LAL 1 3 4 3 3 3 1 1 1 3 3 1 1 1 1 1 1 2 2
HAINES 4 4 4 3 3 3 3 3 3 3 3 4 4 4 4 4 4 4 4 4
MIX HGT 3 5 3 <1 <1 <1 <1 <1 2 3 3 <1 <1 <1 <1 <1 4 5 5 <1
T WIND DIR W W SW W W W W NW NW NW NW N N N N N SE S S S
T WIND SPD 6 12 13 13 3 4 4 9 9 10 11 11 5 3 2 1 5 4 5 6
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 26 72 47 9 2 2 2 11 20 40 46 5 3 2 1 1 26 28 36 3
MAX LVORI 3 1 1 4 7 9 9 5 3 1 1 3 5 7 8 6 2 2 1 3
STABILITY A B C E F F F B B B B F G G G A B B B F
CEILING 2100 100 400 100 2200 None None None 2600
STA PRES 27.21 27.22 27.24 27.29 27.29 27.34 27.36 27.39 27.37
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 61 81 62 84 62 83 62 83
TEMP 64 66 79 71 63 66 82 72 64 66 81 72 64 67 81 73
DEWPT 62 64 65 66 63 64 63 65 64 64 65 66 64 65 67 66
RH 93 93 62 84100 93 53 79100 93 58 81100 93 63 79
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B2 B2 B2 B1 B1 B1 B2 B1 B2 B2 B2 B2 B2 B2 B2
POP 12HR 20 60 30 40 30 60 40 60
RAIN SHWRS IS IS SC NM SC SC SC SC IS SC NM SC SC SC NM
TSTMS IS SC SC IS SC SC 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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