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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
631 PM EST Tue Jan 20 2026
NCZ003-210900-
RAWS 310302
36.35N 80.48W Elev. 1076 ft
631 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 19 42 30 53 33
TEMP 28 24 21 19 19 29 39 42 38 35 33 31 31 40 50 53 45 40 38 37 34
DEWPT 0 0 1 2 2 5 12 16 18 19 20 21 23 29 32 30 30 30 30 30 29
MIN/MAX RH 46 32 71 42 81
RH 29 34 41 47 47 35 32 34 44 52 58 66 72 64 50 41 55 67 73 75 82
WIND DIR NW NW E S SW SW SW SW SW SW SW SW W W W W NW NW NW N N
WIND SPD 3 2 1 1 1 4 9 9 6 6 5 4 3 4 5 4 2 2 2 3 3
WIND GUST 19
CLOUDS CL CL CL FW CL CL FW FW SC B1 B1 B1 SC SC SC SC SC B1 B1 B2 OV
CLOUDS(%) 3 5 5 7 5 5 18 13 26 58 60 51 34 34 27 39 48 59 67 83 90
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 7 7 6
POP 12HR 0 0 5 10 40
RAIN C C C
MIX HGT <1 <1 <1 <1 <1 1 3 3 <1 <1 <1 <1 <1 1 3 4 <1
T WIND DIR NW SW W SW SW SW SW SW SW SW SW SW SW W SW SW SW
T WIND SPD 2 1 1 1 2 13 16 18 6 6 5 4 3 2 2 2 1
DISPERSION VP VP VP VP PR PR PR VP VP VP VP VP
ADI 1 1 1 1 2 26 50 59 3 5 4 3 4 4 7 8 1
MAX LVORI 2 2 2 2 2 2 1 1 2 2 3 3 3 3 2 2 3
STABILITY G G G G B C C C F E E E B C C C F
CEILING None None None None None None None None 19600
STA PRES 29.39 29.37 29.36 29.24 29.20 29.14 29.18 29.15
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 43 20 25 15 28 14 29 4 31
TEMP 41 37 28 22 23 19 16 16 24 25 20 14 26 21 10 5 26 21
DEWPT 27 22 12 9 11 10 12 13 18 18 14 10 15 9 3 0 13 11
RH 57 54 50 57 59 67 84 88 77 74 77 84 62 59 73 79 57 65
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS OV B2 B2 B2 OV OV OV OV B2 B2 B1 B1 B1 SC SC FW FW FW
POP 12HR 50 50 80 90 70 30 10 0 5
FRZG RAIN S
RAIN C C
SLEET S
SNOW C S C L D D D L C C 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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