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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
701 PM EST Tue Jan 20 2026
VAZ012-210900-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
701 PM EST Tue Jan 20 2026
Date 01/20/26 Wed 01/21/26 Thu 01/22/26 Fri
UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12
EST 3hrly 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07
MIN/MAX TEMP 12 47 31 46 26
TEMP 16 15 13 14 31 46 46 36 35 35 33 33 40 46 45 35 31 30 28 26
DEWPT -4 -1 0 1 5 13 16 17 22 28 31 30 29 26 24 24 24 24 22 20
MIN/MAX RH 55 26 93 41 80
RH 40 48 55 55 32 26 29 45 59 75 92 89 64 45 43 64 75 78 78 78
WIND DIR W SW S S S SW SW SW SW W W W W W W W W W NW NW
WIND SPD 2 2 2 2 2 4 4 3 4 5 5 4 4 4 3 2 2 2 2 2
WIND GUST 14
CLOUDS CL CL CL CL CL SC SC B1 B1 B1 B1 B1 SC SC SC SC SC B1 B2 B2
CLOUDS(%) 3 3 4 4 4 30 36 57 61 68 68 58 43 30 27 50 50 56 74 83
VSBY 10 10 10 10 10 10 10 10 10 6 8 10 10 10 10 7 7 7 5 5
POP 12HR 0 10 40 10 30
FRZG DRZL S
FRZG RAIN S C
RAIN C C C C S
SNOW C C S S C C
MIX HGT <1 <1 <1 <1 1 3 2 <1 <1 <1 1 1 2 3 3 <1
T WIND DIR W SW S S S S SW SW SW SW W W W W W NW
T WIND SPD 9 4 3 5 12 12 13 9 14 11 10 11 11 14 12 4
DISPERSION VP VP VP VP VP PR PR VP VP VP VP
ADI 4 2 2 6 17 42 39 4 10 8 7 15 24 47 48 2
MAX LVORI 2 2 3 2 2 1 1 2 2 4 5 4 2 1 1 3
STABILITY G G G B B C C F E E E D C C B G
CEILING None None None None 2200 400 None None None
STA PRES 27.51 27.47 27.44 27.36 27.35 27.33 27.38 27.36
Date 01/23Sat 01/24/26Sun 01/25/26Mon 01/26/26Tue 01/27/26
UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
EST 6hrly 13 19 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19
MAX/MIN TEMP 37 15 25 13 29 8 24 2 30
TEMP 37 26 19 15 24 19 14 13 27 23 14 9 24 15 8 3 26 20
DEWPT 18 11 4 0 7 9 9 9 15 13 8 4 7 4 0 -2 6 6
RH 46 52 51 50 47 64 80 84 60 65 76 80 47 61 69 79 42 54
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B2 B2 OV OV OV OV B2 OV B2 B1 B1 SC SC SC SC SC
POP 12HR 30 40 80 90 70 40 10 5 5
SNOW C S S C L D D D L C C C
$$
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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