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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
631 AM EDT Sun Sep 20 2026
VAZ018-202000-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
631 AM EDT Sun Sep 20 2026
Date Sun 09/20/26 Mon 09/21/26 Tue 09/22/26
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 84 65 81 63 72
TEMP 70 77 82 83 76 72 70 68 68 75 79 80 69 66 66 65 64 68 71 69 64
DEWPT 65 69 69 69 67 65 64 62 64 68 70 69 68 65 64 63 63 68 69 68 64
MAX/MIN RH 63 91 70 99 93
RH 84 76 65 63 74 79 81 81 87 79 74 69 97 97 93 93 97100 93 97100
WIND DIR SW W NW SW W W W NW N SE SE E E SE E E E SE E E E
WIND SPD 5 4 6 3 2 2 2 1 1 2 3 3 2 3 2 2 2 3 3 3 5
WIND GUST 17
CLOUDS B2 SC B1 B2 SC FW FW FW SC B2 B2 B2 OV OV B2 B2 B2 B2 OV OV OV
CLOUDS(%) 73 47 64 85 34 16 15 10 46 70 80 86 90 90 86 78 84 85 94 94 88
VSBY 6 10 10 10 10 9 6 4 5 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 30 10 80 80 90
RAIN SHWRS IS SC IS NM SC O O SC SC NM NM O O O
TSTMS IS SC IS SC SC SC IS SC SC
Obvis PF PF PF
MIX HGT <1 3 4 2 <1 <1 <1 <1 <1 2 3 1 <1 <1 <1 <1 <1 1 2 1 1
T WIND DIR SW W W SW SE SW W W N SE SE E E E NE NE NE E NE NE NE
T WIND SPD 8 9 9 6 4 3 1 3 1 5 8 6 9 5 5 3 8 8 9 9 10
DISPERSION VP VP VP VP VP VP VP VP PR
ADI 8 33 26 19 2 2 1 2 1 15 25 9 4 3 3 2 8 14 19 14 7
MAX LVORI 5 3 3 2 3 4 6 5 7 4 3 3 9 8 6 7 8 5 5 5 8
STABILITY B B D C G G G G A C C C F F F F C C C C E
CEILING 700 5000 None None 2700 700 300 0 100 100
STA PRES 27.79 27.72 27.74 27.76 27.78 27.79 27.85 27.84 27.88 27.90
Date Wed 09/23/26Thu 09/24/26Fri 09/25/26Sat 09/26/26
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 57 63 53 64 51 70 50 70
TEMP 62 58 62 57 57 54 62 57 55 52 67 59 53 51 69 59
DEWPT 60 56 62 57 55 53 61 55 52 50 58 53 49 48 55 52
RH 93 93100100 93 96 97 93 90 93 73 80 86 89 61 78
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS OV B2 B2 B2 B2 B2 B2 B2 B1 B1 B1 SC SC SC SC SC
POP 12HR 80 80 70 50 20 10 5 10
RAIN SHWRS O NM O NM NM NM 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