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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
131 AM EDT Sat Sep 19 2026
VAZ024-200800-
RAWS 441631
37.63N 79.51W Elev. 865 ft
131 AM EDT Sat Sep 19 2026
Date 09/18/26 Sat 09/19/26 Sun 09/20/26 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 80 65 85 66
TEMP 69 68 68 74 78 79 74 70 68 67 68 77 82 84 77 70 68 67 67
DEWPT 67 66 65 65 65 65 65 65 65 65 65 68 69 69 71 70 68 67 67
MIN/MAX RH 100 63 96 61 100
RH 93 93 90 74 64 62 74 84 90 93 90 74 65 61 82100100100100
WIND DIR N N NE E E SE E S SE SE SE S S SW S SW N N N
WIND SPD 1 1 3 3 3 3 2 1 1 1 2 3 4 4 1 1 0 0 1
CLOUDS B2 B2 B1 B1 B1 SC SC B1 B2 B1 B1 B1 SC B1 B1 B1 B1 B1 B1
CLOUDS(%) 78 77 53 57 58 34 40 52 80 59 54 57 38 54 65 62 66 59 52
VSBY 5 4 6 7 7 7 6 5 4 10 10 10 4 4 7
POP 12HR 30 20 10 30 20
RAIN SHWRS IS IS IS SC IS IS SC
TSTMS IS IS IS
Obvis PF PF PF
MIX HGT <1 <1 <1 2 3 3 <1 <1 <1 <1 <1 2 4 2 <1
T WIND DIR N NE NE E E SE SE E S S S SW W SW SW
T WIND SPD 4 3 9 9 3 2 5 1 1 3 5 10 11 13 3
DISPERSION VP VP VP VP VP VP VP VP VP VP
ADI 2 2 7 21 11 8 3 1 1 2 4 30 41 43 2
MAX LVORI 6 7 6 3 3 3 5 8 9 8 9 4 1 3 5
STABILITY F F C C C B F F F F C C C B F
CEILING 2200 None None 4200 1800 None None 9500
STA PRES 28.58 28.62 28.59 28.59 28.55 28.50 28.43
Date 09/21Tue 09/22/26Wed 09/23/26Thu 09/24/26Fri 09/25/26
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 84 63 72 57 66 55 69 54 74
TEMP 83 74 65 63 70 66 61 57 64 61 57 56 67 61 56 55 72 64
DEWPT 70 68 65 63 67 65 61 57 61 60 57 55 61 61 56 55 59 60
RH 65 82100100 90 97100100 90 97100 96 81100100100 64 87
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B1 B2 B1 B1 SC B1
POP 12HR 70 70 70 70 50 40 30 20 30
RAIN SHWRS SC NM NM SC NM NM NM NM SC SC SC SC SC SC IS IS SC
TSTMS SC IS 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