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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
601 PM EDT Tue May 19 2026
NCZ003-200800-
RAWS 310301
36.48N 80.86W Elev. 1300 ft
601 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 63 91 63 78 55
TEMP 84 73 70 65 68 86 89 88 81 72 68 64 67 76 76 71 68 61 58 56 56
DEWPT 57 55 55 54 56 61 59 60 62 62 62 61 63 66 66 68 66 61 58 56 56
MIN/MAX RH 70 36 93 67 100
RH 40 53 59 68 65 43 37 39 53 71 81 90 87 71 71 90 93100100100100
WIND DIR S SW N N N W S SW W NW N N N E SE NE NE E E E E
WIND SPD 2 1 0 0 0 1 3 4 1 1 0 0 0 2 4 4 3 3 1 1 1
CLOUDS B1 B2 SC FW FW FW B1 B1 B2 B1 B1 B1 B1 B1 OV OV OV OV B2 B2 B2
CLOUDS(%) 51 77 41 22 12 8 51 57 73 64 61 51 61 62 96 96 94 94 87 87 83
VSBY 10 10 10 10 10 10 10 10 10 10 9 7 9 10 10 9 3
POP 12HR 0 40 30 90 90
RAIN SHWRS SC SC IS SC SC SC O O O O O O SC
TSTMS SC SC IS IS SC SC IS
MIX HGT <1 <1 <1 <1 <1 5 8 6 <1 <1 <1 <1 1 3 4 2 <1
T WIND DIR SW SW W NW NW W SW S SW NW N N E E E E NE
T WIND SPD 10 5 5 3 3 8 8 10 5 3 4 3 6 6 6 10 12
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 5 3 3 2 3 52 77 78 3 2 2 2 9 26 27 23 6
MAX LVORI 2 2 3 3 3 1 1 1 2 3 5 7 5 3 3 4 6
STABILITY F F F G A A A A F F F F B B C C F
CEILING None None None 16600 14100 None 600 1300 600
STA PRES 28.26 28.25 28.24 28.16 28.18 28.19 28.23 28.20
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 67 55 75 59 79 59 80 60 81
TEMP 62 67 61 59 70 72 64 63 77 74 65 64 77 74 66 64 78 75
DEWPT 62 63 59 59 67 68 62 63 70 70 63 63 70 70 64 64 70 70
RH 100 87 93100 90 87 93100 79 87 93 97 79 87 93100 76 84
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 OV OV B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 OV B2 B1 B2 B2
POP 12HR 50 80 70 50 80 60 80 50 70
RAIN SHWRS SC SC O NM NM SC SC SC SC O NM SC SC O SC IS SC NM
TSTMS SC IS SC IS IS 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