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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 PM EDT Sun Sep 13 2026
VAZ046-140800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
231 PM EDT Sun Sep 13 2026
Date 09/13/26 Mon 09/14/26 Tue 09/15/26 Wed
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 85 56 81 56
TEMP 88 78 74 71 69 70 79 83 83 72 65 60 56 58 72 79 80 71 63 59 57 58
DEWPT 70 71 70 68 66 67 68 65 63 60 54 50 49 50 54 56 57 58 56 56 55 56
MIN/MAX RH 92 50 77 43 96
RH 55 79 87 90 90 90 69 55 51 66 68 69 77 75 53 45 45 63 78 90 93 93
WIND DIR NW W NW W W N NE NE NE NE NE NE NE NE E E E E SE N N SW
WIND SPD 4 2 2 3 3 4 9 8 8 8 6 4 4 4 4 3 4 2 2 0 0 2
WIND GUST 18
CLOUDS SC SC FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW CL
CLOUDS(%) 33 31 9 20 16 24 12 13 7 25 15 12 21 6 20 10 10 7 9 12 7 4
VSBY 10 10 10 8 7 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 5 0 0 0
MIX HGT 5 <1 <1 <1 <1 <1 3 5 6 <1 <1 <1 <1 <1 3 4 4 <1
T WIND DIR NW N NW NW W N N N N NE NE NE NE N E NE E E
T WIND SPD 6 2 3 4 3 5 17 12 10 11 13 6 4 4 6 2 2 3
DISPERSION VP VP VP VP PR PR VP VP VP VP VP VP
ADI 39 1 2 2 2 6 59 76 66 8 6 3 2 5 27 12 12 2
MAX LVORI 1 4 6 6 7 5 1 1 1 3 3 3 4 3 2 2 2 3
STABILITY B G G G G B C B B E F F F B B B B G
CEILING None None None None None None None None None None
STA PRES 29.19 29.25 29.29 29.40 29.41 29.52 29.57 29.66 29.59
Date 09/16Thu 09/17/26Fri 09/18/26Sat 09/19/26Sun 09/20/26
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 60 90 63 90 65 85 65 87
TEMP 85 77 64 62 87 79 66 65 88 79 69 66 83 77 68 67 85 77
DEWPT 63 62 60 59 62 62 60 60 66 67 65 64 66 66 65 65 67 66
RH 48 60 87 90 43 56 81 84 48 67 87 93 57 69 90 93 55 69
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS CL CL CL FW CL FW FW FW FW SC SC SC SC SC SC SC SC B1
POP 12HR 0 0 10 5 20 20 10 10 30
RAIN SHWRS IS 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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