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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 AM EST Tue Jan 20 2026
VAZ046-210900-
RAWS 441101
37.39N 78.80W Elev. 804 ft
231 AM EST Tue Jan 20 2026
Date 01/19/26 Tue 01/20/26 Wed 01/21/26 Thu
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 18 33 17 43 32
TEMP 22 19 25 32 33 25 21 19 17 17 29 40 42 38 36 36 35 34
DEWPT 1 -1 -4 -8 -8 -6 -6 -7 -6 -4 0 6 11 14 16 20 22 25
MIN/MAX RH 42 16 39 23 69
RH 39 40 27 17 16 25 29 30 35 38 28 24 28 37 43 52 59 69
WIND DIR W W W W W W W W S SW S S S S SW SW SW SW
WIND SPD 5 5 10 10 8 2 2 2 2 2 6 11 11 9 10 10 9 6
WIND GUST 17 23 23 21 23 20 19
CLOUDS CL CL CL CL FW CL CL CL CL CL FW FW SC SC SC B1 B1 FW
CLOUDS(%) 2 3 4 3 6 4 2 3 5 5 7 12 26 40 48 57 52 22
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 7
POP 12HR 0 0 0 0 10
MIX HGT <1 <1 3 4 5 <1 <1 <1 <1 <1 2 3 3 <1 <1 <1 <1 <1
T WIND DIR W W W W W W W SW S S S S S S SW SW SW SW
T WIND SPD 16 14 13 14 16 6 2 2 2 2 14 19 25 11 11 10 8 5
DISPERSION PR VP VP VP VP PR FR FR PR
ADI 7 11 40 54 64 3 1 1 1 2 32 46 60 8 10 9 7 4
MAX LVORI 2 2 1 1 1 2 2 2 2 2 1 1 1 2 2 2 3 3
STABILITY F C C C C G G G G B C D D E D D D C
CEILING None None None None None None None None
STA PRES 29.66 29.68 29.75 29.73 29.70 29.54 29.48 29.44
Date 01/22Fri 01/23/26Sat 01/24/26Sun 01/25/26Mon 01/26/26
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 53 28 44 17 24 14 28 8 30
TEMP 51 43 33 29 43 37 27 19 23 20 17 14 25 22 13 9 29 19
DEWPT 29 25 23 22 19 18 13 8 5 4 6 10 12 11 6 3 9 6
RH 42 49 66 75 38 46 55 61 45 49 61 84 57 62 73 76 42 56
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW SC B1 B2 B2 B2 OV OV OV OV B2 B1 SC SC FW FW
POP 12HR 10 10 20 30 60 80 60 20 10
RAIN S
SNOW S S C C L L D L C S S
$$
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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