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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
331 PM EDT Tue May 19 2026
VAZ018-200800-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
331 PM EDT Tue May 19 2026
Date 05/19/26 Wed 05/20/26 Thu 05/21/26 Fri
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 68 91 66 70 54
TEMP 90 80 74 71 68 72 85 90 87 76 71 68 66 66 69 70 66 60 57 56 55 55
DEWPT 57 59 57 54 54 59 62 59 60 62 63 61 61 63 65 65 63 58 55 53 52 53
MIN/MAX RH 65 36 91 82 96
RH 33 49 55 55 61 64 46 35 40 62 76 78 84 90 87 84 90 93 93 90 90 93
WIND DIR W W W W W W W W W W NW N N NE E E E E E E E E
WIND SPD 3 1 2 3 3 2 4 4 4 3 1 0 0 1 2 4 3 4 4 3 3 3
WIND GUST 13 16 14 14 14 18 16 13 14 16
CLOUDS SC B1 B2 B1 SC FW FW SC B1 B1 B2 B2 B2 OV OV OV OV OV OV B2 B2 B2
CLOUDS(%) 36 61 73 56 45 9 12 30 63 55 73 70 78 94 94 98 98 92 92 85 86 86
VSBY 10 10 10 10 10 10 10 10 10 9 7 4 3 3 4 3 2 2
POP 12HR 10 40 60 100 90
RAIN SHWRS SC IS NM NM NM O O O O O O NM NM O
TSTMS SC IS IS SC IS
MIX HGT 8 <1 <1 <1 <1 <1 5 7 5 <1 <1 <1 <1 <1 2 2 2 1
T WIND DIR SW SW SW W W W W W W W NE E SE E E E NE E
T WIND SPD 10 5 4 5 5 9 16 9 4 2 3 8 6 10 13 10 11 9
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 92 3 2 3 3 9 96 81 19 1 2 4 3 13 37 23 24 6
MAX LVORI 1 2 2 3 3 3 1 1 2 3 4 4 5 4 4 4 5 6
STABILITY A F F F F A A A C F F F F B B C B E
CEILING 10600 None None 4100 1300 0 100 100 100
STA PRES 27.91 27.90 27.90 27.84 27.86 27.88 27.93 27.93
Date 05/22Sat 05/23/26Sun 05/24/26Mon 05/25/26Tue 05/26/26
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 60 56 72 62 78 63 79 64 80
TEMP 60 60 59 59 70 68 64 65 77 72 65 66 78 72 67 67 79 74
DEWPT 57 55 54 55 63 61 58 60 66 64 60 61 66 65 61 62 66 64
RH 90 84 83 87 78 78 81 84 69 76 84 84 67 79 81 84 64 71
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B1 B2 B2
POP 12HR 80 70 70 40 70 50 80 40 70
RAIN SHWRS O SC NM SC NM NM SC IS SC NM SC SC SC O SC IS SC NM
TSTMS SC SC SC 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