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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Fri Jul 31 2026
NCZ003-312000-
RAWS 310302
36.35N 80.48W Elev. 1076 ft
801 AM EDT Fri Jul 31 2026
Date Fri 07/31/26 Sat 08/01/26 Sun 08/02/26
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 85 65 84 69 79
TEMP 78 82 83 77 70 67 66 68 76 80 80 77 73 72 70 70 72 75 75 73
DEWPT 61 61 62 64 62 61 61 63 68 70 70 69 68 68 68 70 72 72 74 72
MAX/MIN RH 46 85 68 99 91
RH 56 49 49 64 76 81 84 84 76 72 72 76 84 87 93100100 90 97 97
WIND DIR NE SW SW S S N S S S S S SE S S S SE S S S S
WIND SPD 1 2 2 1 1 0 1 2 4 6 6 5 10 10 6 5 5 5 5 4
CLOUDS CL SC SC FW SC B1 SC SC B2 B2 B1 B2 B2 B2 OV B2 B2 B2 B2 OV
CLOUDS(%) 4 32 34 11 40 64 38 47 71 83 63 70 80 87 88 76 82 85 85 88
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 0 50 60 80
RAIN SHWRS IS SC SC SC SC SC NM NM O O O
TSTMS IS IS IS IS IS IS SC SC SC
MIX HGT 4 6 6 <1 <1 <1 <1 <1 3 5 3 <1 <1 <1 <1 1 2 3 2 <1
T WIND DIR SW SW SW S NE SE S S S S S S S S S S S S SW SW
T WIND SPD 1 5 4 2 1 1 2 3 14 18 19 8 14 14 10 10 18 18 16 12
DISPERSION VP VP VP VP PR FR FR PR VP
ADI 6 42 32 1 1 1 1 3 46 76 67 5 13 13 7 16 47 54 44 8
MAX LVORI 3 1 1 3 4 6 5 5 3 3 3 4 4 4 6 5 4 4 4 6
STABILITY A A A G G F G A C C C E D D E C C C C E
CEILING None None None None 2500 2700 1700 600 300 1500
STA PRES 28.96 28.92 28.91 28.89 28.88 28.80 28.78 28.75 28.76 28.75
Date Mon 08/03/26Tue 08/04/26Wed 08/05/26Thu 08/06/26
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 68 80 67 80 67 82 68 82
TEMP 71 70 75 75 69 69 76 75 70 69 78 76 71 69 80 76
DEWPT 71 70 74 73 69 69 73 72 70 69 73 73 71 69 73 73
RH 100100 97 94100100 90 90100100 85 90100100 79 90
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS OV B2 B2 B2 B1 B1 B1 B2 B1 B1 B1 B2 SC SC SC B2
POP 12HR 80 70 30 60 40 60 20 60
RAIN SHWRS O SC SC NM SC IS IS NM SC IS NM IS IS NM
TSTMS SC IS IS SC SC IS SC SC 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