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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
831 PM EDT Fri Jul 17 2026
NCZ003-180800-
RAWS 310301
36.48N 80.86W Elev. 1300 ft
831 PM EDT Fri Jul 17 2026
Date 07/17/26 Sat 07/18/26 Sun 07/19/26 Mon
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 73 86 69 90 65
TEMP 78 76 73 75 86 84 83 81 75 72 71 73 84 88 85 80 73 69 66 70
DEWPT 70 69 69 70 72 71 72 72 71 70 69 70 72 72 72 72 70 68 66 69
MIN/MAX RH 88 63 96 58 100
RH 76 79 87 84 63 65 70 74 87 93 93 90 67 59 65 77 90 97100 97
WIND DIR NW NW NW NW SW W W SW W W W W NW NW NW NW N N N N
WIND SPD 2 2 3 2 4 6 5 3 2 3 3 2 3 4 3 1 0 0 0 0
CLOUDS B1 B2 B1 SC SC B2 B2 SC SC SC SC B2 B1 B2 B2 B1 SC SC SC SC
CLOUDS(%) 57 73 52 34 37 76 71 44 42 45 47 71 53 82 82 51 35 27 34 34
VSBY 6 6 10 10 10 6 10 10 7 7 7 10 7 6 6 7
POP 12HR 0 60 10 70 20
RAIN SHWRS IS NM SC IS IS NM NM IS IS
TSTMS IS SC SC IS SC SC IS IS
Obvis K K
MIX HGT <1 <1 <1 <1 4 5 4 <1 <1 <1 <1 <1 4 5 3 <1
T WIND DIR NW NW NW NW W SW W W NW NW W NW NW W W NW
T WIND SPD 3 3 4 5 6 10 9 11 11 6 4 11 14 13 9 11
DISPERSION VP VP VP VP VP VP VP VP VP VP VP
ADI 2 2 2 6 39 41 32 5 5 3 2 13 70 81 34 5
MAX LVORI 3 4 5 5 1 1 3 3 5 6 6 5 1 1 1 4
STABILITY F F G A A C C F G G F B B B B F
CEILING None None None 3700 None None 3700 5800 None
STA PRES 28.17 28.14 28.14 28.05 28.03 28.02 28.06 28.02
Date 07/20Tue 07/21/26Wed 07/22/26Thu 07/23/26Fri 07/24/26
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 86 67 90 69 86 63 83 62 85
TEMP 83 81 70 71 87 84 73 72 84 79 67 66 80 78 65 67 82 79
DEWPT 71 72 69 70 71 72 69 70 71 69 62 62 63 65 61 62 65 66
RH 67 74 97 97 59 67 87 93 65 72 84 87 56 64 87 84 56 64
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC B2 SC SC B1 B1 SC B1 B1 B1 SC SC SC FW FW SC SC SC
POP 12HR 60 20 30 30 50 20 20 10 20
RAIN SHWRS NM IS SC IS SC SC SC IS IS IS
TSTMS SC IS SC IS IS 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