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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
245 PM EDT Fri Jul 17 2026
VAZ012-180800-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
245 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 66 80 65 85 61
TEMP 91 83 72 69 67 69 77 80 79 75 69 68 67 67 75 79 83 76 66 63 61 64
DEWPT 65 66 66 65 65 68 69 69 69 68 67 66 66 67 70 68 67 66 65 63 61 64
MIN/MAX RH 96 68 100 59 100
RH 42 57 81 87 93 97 76 69 72 79 93 93 97100 84 69 59 71 97100100100
WIND DIR S NW N W W W W W W W W W W W W W NW NW N N N N
WIND SPD 1 1 0 1 1 2 2 4 3 3 3 3 3 3 2 2 2 1 0 0 0 0
CLOUDS SC SC B2 B1 SC B1 SC B2 B1 SC SC SC B2 B2 B1 B2 B2 FW FW FW FW SC
CLOUDS(%) 36 42 72 65 41 65 42 77 69 35 36 50 82 86 59 76 76 17 11 11 24 34
VSBY 10 10 10 10 10 10 7 6 6 6 6 7 7 7 7 6 6 10
POP 12HR 5 70 50 60 5
RAIN SHWRS IS NM SC IS IS SC IS IS NM NM
TSTMS IS SC SC IS IS IS SC SC
MIX HGT 6 <1 <1 <1 <1 <1 3 4 3 <1 <1 <1 <1 1 3 4 4 1
T WIND DIR SE S W W W W W W W W W W W W W W W W
T WIND SPD 6 6 3 5 8 8 8 12 14 12 8 8 5 9 14 12 11 9
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 49 3 2 3 4 8 32 46 61 6 4 4 3 15 51 65 55 4
MAX LVORI 1 3 5 6 6 6 3 1 3 4 6 6 9 5 4 1 1 3
STABILITY A F F F F B A C B G G F F B B B B G
CEILING None 3400 100 None 2500 None 400 500 2100 None
STA PRES 27.32 27.33 27.31 27.30 27.23 27.20 27.18 27.22 27.20
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 63 89 65 83 56 81 56 84
TEMP 81 77 65 66 83 79 68 67 78 74 60 60 76 72 59 60 79 74
DEWPT 65 65 63 66 66 66 65 67 66 62 58 59 59 59 56 58 60 61
RH 58 67 93100 57 64 90100 67 66 93 96 56 64 90 93 52 64
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC B1 SC SC B1 B1 B1 B2 B2 B1 SC SC SC FW FW FW SC SC
POP 12HR 30 5 30 60 50 20 5 5 20
RAIN SHWRS SC IS SC SC NM SC SC IS IS
TSTMS SC IS SC 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