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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
101 PM EDT Mon May 18 2026
NCZ003-182000-
RAWS 310301
36.48N 80.86W Elev. 1300 ft
101 PM EDT Mon May 18 2026
Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26
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 89 61 90 62 89
TEMP 87 88 81 72 68 63 69 82 88 89 82 73 69 64 69 85 88 86 79
DEWPT 62 59 59 57 57 57 59 60 56 55 56 55 55 54 56 60 60 62 65
MAX/MIN RH 38 84 32 72 39
RH 43 38 47 59 68 81 70 47 34 32 41 53 61 70 63 43 39 45 62
WIND DIR S S S SW N N N SW SW S S SW N N N SW SW SW NW
WIND SPD 8 8 4 1 0 0 0 4 8 8 3 1 0 0 0 1 4 4 2
WIND GUST 14 13
CLOUDS CL FW FW CL FW FW FW FW FW SC B1 B1 SC SC FW FW B1 B1 B1
CLOUDS(%) 5 6 6 5 11 25 22 22 13 44 54 52 32 41 14 14 69 69 63
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 0 0 5 50
RAIN SHWRS SC SC SC
TSTMS SC SC IS
MIX HGT 6 6 <1 <1 <1 <1 <1 4 6 7 <1 <1 <1 <1 <1 5 8 3 <1
T WIND DIR SW S S SW SW W W W SW SW S SW SW NW NW W SW NE S
T WIND SPD 12 16 10 5 3 2 2 5 9 11 9 5 3 3 3 6 5 12 8
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 84113 5 3 2 1 2 26 65 87 4 3 2 2 3 42 28 43 4
MAX LVORI 1 1 2 3 3 5 4 2 1 1 2 3 3 3 3 1 2 1 3
STABILITY B B G G G G A A B B F G G G A A C C F
CEILING None None None None None None None None 2800
STA PRES 28.31 28.35 28.34 28.35 28.28 28.28 28.26 28.25 28.23
Date Thu 05/21/26Fri 05/22/26Sat 05/23/26Sun 05/24/26
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 62 79 53 69 55 77 59 80
TEMP 66 66 78 69 60 55 66 67 59 59 73 73 63 63 76 75
DEWPT 63 63 66 63 56 55 61 61 58 59 67 68 63 63 69 70
RH 90 90 67 81 87100 84 81 96100 81 84100100 79 84
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B1 B2 OV OV B2 B2 B2 B2 B2 B2 B2 B2 B2 B1 B2
POP 12HR 60 90 90 80 80 70 50 80
RAIN SHWRS SC NM NM O O O O NM O NM SC NM SC SC SC O
TSTMS IS IS SC 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