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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Fri Jul 31 2026
VAZ018-312000-
RAWS 444002
37.56N 80.18W Elev. 2702 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 88 64 86 67 78
TEMP 76 82 84 75 69 66 65 68 79 83 82 74 73 71 70 69 72 75 75 71
DEWPT 58 57 57 59 56 57 57 59 63 65 66 66 65 65 66 67 70 72 72 70
MAX/MIN RH 39 77 54 94 86
RH 54 43 40 58 63 73 75 73 58 55 58 76 76 81 87 93 93 90 90 97
WIND DIR N S S E N N N SW SE S S SE SE SE SE SE SE S S SE
WIND SPD 1 2 2 1 0 0 0 1 3 6 6 6 5 5 4 4 4 5 5 3
WIND GUST 13 19 21 23 21 23 17 14 16 17 16 13
CLOUDS FW SC SC SC B1 B1 SC B1 B2 OV B2 B1 B2 B2 B2 B2 OV OV B2 B2
CLOUDS(%) 20 36 35 41 59 55 31 64 86 92 70 68 77 87 87 84 90 90 85 80
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 20 70 80
RAIN SHWRS IS IS SC SC NM NM O O NM
TSTMS IS IS IS IS SC SC SC
MIX HGT 4 6 6 <1 <1 <1 <1 <1 4 5 4 2 <1 <1 <1 <1 2 3 2 <1
T WIND DIR W W W SE SE S SE S S S S S S S SE SE S S SW W
T WIND SPD 2 3 2 4 3 4 1 2 17 24 23 12 10 16 11 8 10 17 17 9
DISPERSION VP VP VP VP PR PR PR VP VP
ADI 13 25 18 2 2 2 1 2 86103 91 8 7 11 8 8 21 50 48 4
MAX LVORI 2 2 2 3 3 3 4 3 1 1 1 4 4 4 5 6 5 4 4 9
STABILITY A A A F F F G B A C C E E E E C C C C F
CEILING None None None None 12300 2500 2200 500 500 1800
STA PRES 27.82 27.78 27.76 27.74 27.72 27.66 27.64 27.60 27.61 27.61
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 67 82 66 81 66 82 68 84
TEMP 70 69 78 73 68 68 78 73 68 68 79 74 69 69 82 75
DEWPT 68 68 72 70 66 67 71 70 66 67 71 71 67 68 71 70
RH 93 97 82 90 93 97 79 90 93 97 77 90 93 97 69 84
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B1 B2 B1 B1 B1 B2 SC B1 B1 B2 SC SC SC B1
POP 12HR 70 60 30 70 20 60 20 50
RAIN SHWRS NM SC SC NM SC IS NM IS IS NM IS IS SC
TSTMS SC IS SC SC IS SC 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