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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
531 AM EDT Tue May 19 2026
VAZ012-192000-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
531 AM EDT Tue May 19 2026
Date Tue 05/19/26 Wed 05/20/26 Thu 05/21/26
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 90 61 88 59 79
TEMP 64 79 85 86 78 68 65 62 65 78 83 82 73 66 62 60 63 72 76 71 66
DEWPT 55 55 52 52 53 52 51 51 55 57 55 56 60 60 60 58 61 62 62 63 60
MAX/MIN RH 29 70 35 95 63
RH 73 44 32 31 42 57 60 67 70 48 38 41 64 81 93 93 93 71 62 76 81
WIND DIR W W W SW S SW W W W W W W NW N N N N E SE E E
WIND SPD 1 2 3 2 1 1 1 2 2 3 3 3 2 0 0 0 0 1 2 1 3
CLOUDS SC SC B1 B1 B1 SC B1 SC FW FW B1 B1 B1 B1 B1 B1 OV OV OV OV OV
CLOUDS(%) 41 28 55 59 63 42 67 37 19 17 66 61 58 68 63 66 88 88 98 98 92
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 6 2 0 2 10 10 10 10
POP 12HR 5 0 40 40 100
RAIN SHWRS SC SC SC SC IS IS O O O O O
TSTMS SC SC IS IS SC SC IS
MIX HGT <1 4 7 7 <1 <1 <1 <1 <1 5 7 5 <1 <1 <1 <1 <1 2 2 2 <1
T WIND DIR SW SW SW SW S S SW W W W W W N N N NW NW N NW E E
T WIND SPD 3 6 10 9 3 6 4 6 11 16 9 9 10 10 4 4 6 5 2 9 8
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 3 33 76 66 2 3 2 3 11 98 66 50 5 5 2 2 7 17 7 18 4
MAX LVORI 3 1 1 1 2 3 3 3 3 1 1 1 3 5 6 6 6 3 3 3 5
STABILITY A A B B F F F G A A B B F F F F B B B B F
CEILING None 4400 None None None 3400 500 200 200 200
STA PRES 27.47 27.42 27.39 27.40 27.39 27.33 27.35 27.36 27.39 27.36
Date Fri 05/22/26Sat 05/23/26Sun 05/24/26Mon 05/25/26
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 52 70 56 73 58 77 58 77
TEMP 58 55 67 65 60 60 70 70 61 60 74 71 62 61 74 71
DEWPT 54 54 58 57 56 58 62 61 58 59 62 62 59 60 62 62
RH 86 96 73 75 87 93 76 73 90 96 66 73 90 97 66 73
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS OV B2 B2 B2 B2 B2 B2 OV B1 B2 B2 OV B1 B1 B2 OV
POP 12HR 90 70 40 90 40 80 30 90
RAIN SHWRS O SC SC NM SC SC SC O SC IS NM O SC SC O
TSTMS IS IS SC IS IS SC IS IS 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
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