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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
431 AM EDT Sat Jul 18 2026
NCZ003-182000-
RAWS 310301
36.48N 80.86W Elev. 1300 ft
431 AM EDT Sat Jul 18 2026
Date Sat 07/18/26 Sun 07/19/26 Mon 07/20/26
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 90 70 88 67 86
TEMP 73 76 87 88 84 81 75 72 71 73 83 87 85 80 73 69 67 70 79 83 85 80
DEWPT 69 70 72 73 73 73 71 69 69 70 73 72 73 72 71 68 67 69 73 72 72 73
MAX/MIN RH 57 94 61 100 66
RH 87 82 61 61 70 77 87 90 93 90 72 61 67 77 93 97100 97 82 70 65 79
WIND DIR N N SW W W W W SW W W NW W NW NW N N N N SE S S N
WIND SPD 0 0 4 6 4 2 1 1 2 2 3 4 3 1 0 0 0 0 1 3 3 0
CLOUDS B1 SC B1 B2 B2 SC SC SC SC B1 B1 B2 B2 B1 B1 SC SC SC SC B2 B2 B1
CLOUDS(%) 52 49 51 80 71 44 42 45 47 55 56 72 70 60 51 34 30 40 40 80 80 52
VSBY 10 10 10 6 10 10 7 7 7 10 7 6 6 6 7 10 10 7 7 6 6 7
POP 12HR 80 10 50 40 70
RAIN SHWRS NM SC IS SC SC IS IS IS NM NM SC
TSTMS SC SC IS SC SC IS IS SC SC SC
MIX HGT <1 <1 4 4 2 <1 <1 <1 <1 <1 4 5 2 <1 <1 <1 <1 <1 3 4 3 <1
T WIND DIR W W SW SW SW W W NW W NW NW W W NW N N N E S SW SW N
T WIND SPD 2 2 12 12 17 9 5 6 3 9 11 9 6 3 4 4 4 8 2 4 5 1
DISPERSION VP VP VP VP VP VP VP VP VP VP
ADI 1 2 45 45 43 4 3 3 2 11 51 39 21 2 2 2 2 9 10 23 18 1
MAX LVORI 6 5 1 1 1 4 6 6 7 5 3 1 3 4 6 8 9 6 4 3 3 4
STABILITY F A C C C F F F F B B C B F F G G A A B B F
CEILING None 3300 None None 9400 4500 None None None 3600
STA PRES 28.11 28.03 28.03 28.00 28.04 28.01 28.04 28.07 28.09 28.05
Date Tue 07/21/26Wed 07/22/26Thu 07/23/26Fri 07/24/26
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 67 89 69 87 61 84 62 85
TEMP 70 71 86 82 73 72 85 80 66 65 81 78 66 67 82 79
DEWPT 69 70 73 72 70 70 70 68 62 62 62 64 60 61 65 67
RH 97 97 65 72 90 93 61 67 87 90 53 62 81 81 56 67
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B1 B1 B1 B1 B1 SC B1 FW FW SC SC SC SC B1 SC
POP 12HR 30 40 40 40 20 20 10 20
RAIN SHWRS SC IS SC SC SC SC SC IS IS IS IS
TSTMS SC IS SC SC IS SC IS
$$
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