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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
621 AM EDT Sun Sep 27 2026
VAZ012-272000-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
621 AM EDT Sun Sep 27 2026
Date Sun 09/27/26 Mon 09/28/26 Tue 09/29/26
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 67 47 68 47 77
TEMP 44 56 63 63 56 52 49 47 47 58 64 65 58 52 49 48 48 63 72 75 64
DEWPT 44 48 50 49 47 47 47 46 46 52 56 56 54 52 49 48 48 55 57 55 56
MAX/MIN RH 55 98 67 100 50
RH 100 74 62 60 72 83 93 96 96 80 75 73 86100100100100 75 59 50 75
WIND DIR NW NW NW NW NW NW NW NW NW NW NW NW NW NW N N N N N N N
WIND SPD 3 4 4 4 3 3 3 3 3 3 3 3 2 1 0 0 0 0 0 0 0
CLOUDS SC FW FW FW CL CL FW SC SC SC SC SC SC CL SC B1 B1 SC CL FW FW
CLOUDS(%) 40 22 16 12 3 1 11 26 47 35 44 44 31 4 38 53 59 36 0 8 13
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 5 5 5 0
MIX HGT <1 2 3 3 <1 <1 <1 <1 <1 2 3 3 <1 <1 <1 <1 <1 3 5 4 <1
T WIND DIR NW NW NW NW NW NW NW NW NW NW NW NW NW NW NW NW NW N NW NW NE
T WIND SPD 6 23 21 23 10 8 6 8 12 13 16 16 11 11 5 3 2 4 4 3 1
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 7 62 93 95 5 4 3 4 13 40 64 66 5 5 3 2 2 18 27 19 1
MAX LVORI 8 3 1 1 3 5 6 8 5 3 3 3 5 9 9 10 10 3 2 2 4
STABILITY B B B B G G G G B B B B G G G F C A A A G
CEILING None None None None None None None None None None
STA PRES 27.16 27.14 27.17 27.17 27.21 27.22 27.25 27.26 27.30 27.28
Date Wed 09/30/26Thu 10/01/26Fri 10/02/26Sat 10/03/26
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 50 80 53 82 56 80 57 75
TEMP 52 51 76 66 55 54 77 69 59 57 76 67 59 57 70 65
DEWPT 51 50 54 55 52 50 58 59 55 55 62 62 57 56 62 60
RH 96 96 46 68 90 86 52 70 87 93 62 84 93 96 76 84
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW SC FW SC SC SC SC SC SC B1 B1 B1 B1 B2
POP 12HR 0 0 0 0 5 20 20 40
RAIN SHWRS IS IS IS SC 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