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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1031 PM EDT Wed Jul 29 2026
VAZ046-300800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
1031 PM EDT Wed Jul 29 2026
Date 07/29/26 Thu 07/30/26 Fri 07/31/26 Sat
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 62 87 64 88 67
TEMP 70 66 64 68 79 85 86 79 72 69 66 69 81 86 86 79 72 69 68 70
DEWPT 58 61 59 60 60 60 61 61 61 59 58 60 63 62 61 63 64 64 63 65
MIN/MAX RH 84 42 78 42 87
RH 66 84 84 76 52 43 43 54 68 70 75 73 54 45 43 58 76 84 84 84
WIND DIR NW NW W NW N NW N N N N NW N NE SW S SE SE S SW S
WIND SPD 3 2 3 3 5 4 4 2 3 2 3 2 2 3 3 2 2 1 2 2
CLOUDS CL CL CL CL CL CL FW FW SC CL FW FW CL FW SC FW SC SC SC B1
CLOUDS(%) 0 3 2 2 3 4 22 25 35 5 10 9 4 20 27 19 30 40 36 53
VSBY 10 10 10 10 10 10 10 10 7 7 7 7 7 7 7 7 7 7 7 7
POP 12HR 0 0 0 0 0
MIX HGT <1 <1 <1 <1 4 7 8 <1 <1 <1 <1 <1 5 7 8 <1
T WIND DIR NW NW NW NW NW NW NW N N NW NW NW NW W W E
T WIND SPD 11 4 3 11 12 8 9 3 3 3 2 2 1 3 2 2
DISPERSION VP VP VP VP VP VP VP VP VP VP VP
ADI 5 2 2 11 71 68 86 2 2 2 1 2 7 30 21 1
MAX LVORI 3 5 5 4 1 1 1 3 3 3 4 3 2 2 2 3
STABILITY F G F A A A A G G G G A A A A G
CEILING None None None None None None None None
STA PRES 29.17 29.20 29.19 29.26 29.28 29.30 29.25
Date 08/01Sun 08/02/26Mon 08/03/26Tue 08/04/26Wed 08/05/26
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 87 68 83 68 81 68 84 69 84
TEMP 86 79 72 70 80 76 72 70 79 75 70 70 82 77 70 70 83 77
DEWPT 67 68 69 70 74 73 72 70 76 74 70 70 75 74 70 70 75 74
RH 53 69 90100 82 90100100 91 97100100 79 90100100 77 90
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B2 B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1
POP 12HR 10 40 60 70 60 30 40 30 40
RAIN SHWRS SC SC SC NM NM SC SC NM SC IS IS SC SC IS IS SC
TSTMS IS SC SC SC IS IS IS 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