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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
731 PM EDT Fri Aug 28 2026
VAZ046-290800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
731 PM EDT Fri Aug 28 2026
Date 08/28/26 Sat 08/29/26 Sun 08/30/26 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 66 86 67 90 69
TEMP 78 71 69 67 67 78 83 84 77 70 68 67 68 81 87 89 82 74 72 70 71
DEWPT 68 68 67 66 66 67 67 67 68 68 68 67 68 70 70 68 69 68 68 68 69
MIN/MAX RH 98 55 100 50 96
RH 71 90 93 97 97 69 59 57 74 93100100100 69 57 50 65 82 87 93 93
WIND DIR NE NE NE NE NE NE E E E SE S S S SW S S S S SW SW SW
WIND SPD 3 2 2 4 6 8 6 5 3 3 1 1 1 3 5 5 4 4 3 4 3
CLOUDS SC B1 B1 B2 B2 B1 B1 B1 FW SC SC FW SC SC FW FW FW FW FW FW FW
CLOUDS(%) 43 59 69 70 70 54 56 63 13 32 37 24 28 37 24 23 16 16 12 13 6
VSBY 10 10 10 10 10 10 10 10 10 10 10 6 6 10 10 10 10
POP 12HR 10 10 10 0 0
RAIN SHWRS
TSTMS
MIX HGT <1 <1 <1 <1 <1 3 5 4 <1 <1 <1 <1 <1 3 6 5 <1
T WIND DIR E NE N NE NE E SE SE SE SE S S SW SW SW SW SW
T WIND SPD 10 3 4 4 10 9 6 6 3 2 3 4 5 10 9 9 8
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 5 2 2 3 11 31 27 26 2 1 2 2 6 43 63 55 4
MAX LVORI 4 7 9 9 7 3 2 2 3 7 10 9 9 3 1 1 3
STABILITY G F F E C B C C G G G G A A A A F
CEILING 2600 6400 4000 None None None None None None
STA PRES 29.38 29.43 29.48 29.44 29.46 29.47 29.47 29.38
Date 08/31Tue 09/01/26Wed 09/02/26Thu 09/03/26Fri 09/04/26
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 95 72 97 74 98 73 96 72 94
TEMP 93 84 74 74 94 86 76 75 95 88 77 74 94 85 74 73 91 83
DEWPT 67 67 67 68 67 68 68 69 68 68 68 69 68 69 68 68 68 68
RH 43 57 79 82 41 55 76 82 42 52 74 84 43 59 82 84 47 61
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW FW FW FW FW FW FW FW SC SC FW SC SC FW FW B1
POP 12HR 0 0 0 5 10 10 20 10 30
RAIN SHWRS IS SC
TSTMS 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
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