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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 PM EDT Fri Jul 31 2026
VAZ024-010800-
RAWS 441631
37.63N 79.51W Elev. 865 ft
801 PM EDT Fri Jul 31 2026
Date 07/31/26 Sat 08/01/26 Sun 08/02/26 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 63 90 68 84 68
TEMP 72 67 64 68 83 88 88 82 77 73 71 71 76 81 81 77 73 72 71 72
DEWPT 57 57 58 61 63 63 65 65 67 67 67 68 71 71 72 72 72 72 71 72
MIN/MAX RH 85 43 93 72 100
RH 59 70 81 78 51 43 47 56 71 81 87 90 85 72 74 85 97100100100
WIND DIR N N N N S S S S SE S SE SE SE SE SE SE SE S N SW
WIND SPD 0 0 0 0 3 6 8 6 5 4 3 3 4 5 4 2 1 1 0 1
WIND GUST 18 19 21 24 19 14
CLOUDS SC B1 SC SC B2 OV OV B2 B2 B2 B1 B2 OV OV B2 OV OV B2 B2 B2
CLOUDS(%) 38 59 48 47 75 90 88 76 84 72 69 74 88 90 86 91 91 84 84 74
VSBY 10 10 10 10 10 10 10 10 10 10 8 6 5 3 3 3 3 6 6 6
POP 12HR 0 5 50 80 90
RAIN SHWRS SC SC SC O O O O SC SC SC
TSTMS SC SC SC SC SC SC SC
MIX HGT <1 <1 <1 <1 3 6 5 1 <1 <1 <1 <1 2 3 3 <1
T WIND DIR SE SE E SE S S S S S S S SE S S S S
T WIND SPD 2 2 1 1 14 18 18 12 11 14 9 8 8 13 17 9
DISPERSION VP VP VP PR PR VP VP VP VP VP VP
ADI 1 1 1 1 54 82 76 8 8 10 4 9 19 46 51 4
MAX LVORI 3 3 6 4 1 1 1 2 3 4 5 6 4 3 3 5
STABILITY G F F A A C C E E E F B C C C F
CEILING None None 19400 4100 4100 2000 100 1200 100
STA PRES 28.48 28.47 28.46 28.41 28.40 28.39 28.40 28.38
Date 08/03Tue 08/04/26Wed 08/05/26Thu 08/06/26Fri 08/07/26
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 85 67 87 67 88 68 91 69 92
TEMP 83 79 71 68 85 80 70 70 87 81 72 71 89 82 71 72 90 82
DEWPT 73 72 70 68 72 71 70 70 72 72 70 70 71 72 71 71 71 72
RH 72 79 97100 65 74100100 61 74 93 97 56 72100 97 54 72
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B1 SC B1 B2 SC SC B1 B1 SC SC B1 B1 SC SC SC B1
POP 12HR 70 40 60 30 30 10 40 20 40
RAIN SHWRS SC NM SC IS NM SC SC SC IS SC
TSTMS SC SC SC IS 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