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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 AM EDT Mon Jul 20 2026
NCZ003-210800-
RAWS 310302
36.35N 80.48W Elev. 1076 ft
231 AM EDT Mon Jul 20 2026
Date 07/19/26 Mon 07/20/26 Tue 07/21/26 Wed
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 71 84 69 87 71
TEMP 72 72 78 83 83 79 74 72 71 72 80 86 84 81 76 75 73 72
DEWPT 69 70 72 72 73 72 71 71 70 71 74 74 74 72 71 71 70 72
MIN/MAX RH 95 69 100 68 100
RH 90 93 82 70 72 79 90 97 97 97 82 68 72 74 85 87 90100
WIND DIR N NE E S SE SW SE S SW SW SW SW W SW SW SW SW SW
WIND SPD 2 4 3 4 3 2 2 3 4 6 8 9 9 10 11 12 11 9
WIND GUST 20 20
CLOUDS B2 B1 B1 B1 B2 B2 B2 B2 B2 B1 B1 B2 B2 B1 B1 B2 B2 OV
CLOUDS(%) 76 53 57 67 80 82 76 77 78 62 66 78 72 59 66 84 84 92
VSBY 7 8 10 10 10 10 10 10 8 10 10 6 10 4 6 10 3 10
POP 12HR 40 70 70 70 80
RAIN SHWRS SC NM NM NM IS NM SC SC SC O O O
TSTMS SC NM SC SC IS NM SC SC SC IS IS IS
Obvis PF
MIX HGT <1 <1 2 4 2 <1 <1 <1 <1 <1 2 3 2 <1 <1 <1 <1 <1
T WIND DIR N NE E S S SE S W SW SW SW W W W SW SW SW SW
T WIND SPD 2 9 4 2 8 4 11 2 2 5 13 5 14 4 3 3 6 8
DISPERSION VP VP VP VP VP FR FR FR FR
ADI 1 11 14 8 25 2 5 1 2 4 37 18 31 4 3 3 6 7
MAX LVORI 8 7 4 3 3 5 9 10 10 9 4 3 3 4 5 6 6 8
STABILITY F C B C B F F F E C C C C D D D D C
CEILING 3100 None 2500 3600 1300 2100 3600 3500 2100
STA PRES 28.87 28.91 28.85 28.87 28.83 28.85 28.87 28.80 28.81
Date 07/22Thu 07/23/26Fri 07/24/26Sat 07/25/26Sun 07/26/26
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 84 65 78 63 79 65 78 65 83
TEMP 80 78 68 65 75 73 66 65 76 74 67 66 76 74 66 67 81 78
DEWPT 73 71 66 64 65 66 64 64 66 66 65 65 68 68 66 66 69 69
RH 79 79 93 97 71 79 93 97 71 76 93 97 76 82100 97 67 74
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS OV OV B2 B1 B1 B1 B1 B1 B1 B1 B1 B2 B2 B1 B1 SC SC B1
POP 12HR 90 60 30 30 20 30 40 20 30
RAIN SHWRS O O NM SC SC SC SC SC IS IS IS SC SC SC IS IS SC
TSTMS SC SC IS SC IS IS 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