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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
401 PM EDT Fri Sep 11 2026
VAZ046-120800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
401 PM EDT Fri Sep 11 2026
Date 09/11/26 Sat 09/12/26 Sun 09/13/26 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 68 83 69 88 67
TEMP 80 74 69 69 69 69 76 82 82 75 72 71 70 70 80 86 88 79 72 69 68 68
DEWPT 73 72 69 68 67 69 74 74 74 73 72 71 70 70 74 73 72 72 70 69 67 68
MIN/MAX RH 100 75 100 59 100
RH 79 93100 97 93100 94 77 77 94100100100100 82 65 59 79 93100 97100
WIND DIR NE E E NE NE NE E SE E S SE S S SW W NW W W W W W NW
WIND SPD 8 5 4 3 3 3 3 4 4 2 2 2 3 4 4 4 3 2 2 2 3 4
CLOUDS B1 B1 B1 B1 B2 B2 OV OV B2 OV OV B2 B1 B1 SC SC SC SC FW FW FW FW
CLOUDS(%) 69 59 56 66 87 81 88 89 85 91 88 86 62 59 39 40 40 27 21 20 17 21
VSBY 5 5 8 5 3 2 5 10 10 9 4 5 5 6 10 7 7 10 10 10 10
POP 12HR 40 70 80 20 5
RAIN SHWRS SC SC IS IS SC O NM SC IS IS IS
TSTMS SC SC IS SC SC IS IS IS
Obvis PF
MIX HGT 3 <1 <1 <1 <1 <1 1 2 2 <1 <1 <1 <1 <1 3 5 3 <1
T WIND DIR NE E E E E E E SE S E NE S SW W NW NW W SW
T WIND SPD 9 13 11 8 8 8 9 11 6 1 1 2 4 8 6 5 6 1
DISPERSION PR VP VP VP VP VP VP VP VP VP VP VP
ADI 20 9 8 4 4 6 14 24 13 1 1 1 2 9 23 33 28 1
MAX LVORI 3 6 8 8 8 8 5 3 4 8 10 10 9 8 3 1 2 4
STABILITY D E E F F C C D D F F F F D B B B G
CEILING 3000 1400 400 4000 5200 3200 None None None
STA PRES 29.33 29.36 29.38 29.33 29.32 29.30 29.30 29.23
Date 09/14Tue 09/15/26Wed 09/16/26Thu 09/17/26Fri 09/18/26
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 86 57 79 58 83 62 89 67 85
TEMP 83 75 62 58 76 71 60 59 82 75 65 64 87 80 70 68 83 75
DEWPT 68 65 59 57 61 62 60 59 66 66 63 63 67 67 65 63 66 66
RH 61 71 90 96 60 73100100 58 74 93 97 52 65 84 84 57 74
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC FW SC FW SC FW SC FW FW FW FW FW FW SC SC SC B1
POP 12HR 20 0 0 0 0 0 10 20 30
RAIN SHWRS IS IS SC
TSTMS 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