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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 PM EDT Sun Sep 20 2026
VAZ024-210800-
RAWS 441631
37.63N 79.51W Elev. 865 ft
231 PM EDT Sun Sep 20 2026
Date 09/20/26 Mon 09/21/26 Tue 09/22/26 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 65 83 62 74 56
TEMP 84 76 71 68 66 66 76 81 80 71 67 66 65 64 70 74 72 66 63 62 59 56
DEWPT 68 67 67 66 65 66 69 69 68 67 65 64 64 63 65 67 66 65 63 62 59 56
MIN/MAX RH 100 63 99 80 100
RH 59 74 87 93 97100 79 67 67 87 93 93 97 97 84 79 81 97100100100100
WIND DIR W S N N N N E E E E E NE E NE E E NE NE NE NE NE NE
WIND SPD 2 1 0 0 0 0 2 3 3 3 1 1 1 1 2 3 4 5 4 4 5 5
WIND GUST 16 19 20 21 21
CLOUDS B1 B2 B2 SC SC SC B1 B1 B2 OV OV OV OV OV OV OV OV OV OV B2 B2 B2
CLOUDS(%) 61 87 75 31 30 47 62 69 77 90100 99 93 88 98100100100100 87 85 80
VSBY 10 10 10 10 3 2 10 7 6 3 5 2 2 3 4 3 3 6 6 3 3 6
POP 12HR 5 70 80 90 90
RAIN SHWRS IS SC SC NM O NM SC SC SC O O O O O O NM
TSTMS SC SC SC SC IS IS
MIX HGT 2 <1 <1 <1 <1 <1 2 3 2 <1 <1 <1 <1 <1 1 2 2 1
T WIND DIR SW S S NW N N E E E NE NE NE NE N NE NE NE NE
T WIND SPD 8 4 2 2 2 3 5 6 10 10 8 5 6 9 9 12 13 12
DISPERSION VP VP VP VP VP VP VP VP PR VP VP PR
ADI 20 2 1 1 1 3 13 20 22 5 7 3 3 7 15 25 24 14
MAX LVORI 2 4 6 7 8 9 4 3 3 5 6 6 8 6 4 3 4 5
STABILITY C F F G G A C C C F D F F C C D D D
CEILING 3800 11200 None 1300 1700 300 300 1100 1800 1100
STA PRES 28.44 28.44 28.46 28.51 28.50 28.57 28.57 28.60 28.62
Date 09/23Thu 09/24/26Fri 09/25/26Sat 09/26/26Sun 09/27/26
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 66 53 64 50 71 48 75 49 77
TEMP 65 60 57 54 63 59 53 51 68 61 52 49 72 64 53 50 75 65
DEWPT 61 59 57 54 58 56 53 50 53 52 48 47 51 52 49 48 54 57
RH 87 96100100 84 90100 96 59 72 86 93 48 65 86 93 48 75
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B2 B2 B1 B2 B1 SC SC SC SC SC FW SC SC SC SC SC
POP 12HR 70 70 40 20 5 5 5 5 5
RAIN SHWRS NM NM NM SC SC SC 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