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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 AM EST Tue Jan 20 2026
NCZ006-210900-
RAWS 310801
36.37N 79.29W Elev. 580 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 19 39 17 46 32
TEMP 22 19 28 36 38 28 23 20 18 18 30 43 46 40 36 35 34 35
DEWPT 8 5 3 -1 -3 0 -1 -1 0 3 7 11 15 18 21 25 26 25
MIN/MAX RH 55 17 51 25 72
RH 54 54 33 20 17 29 34 39 44 51 37 27 28 41 54 66 72 66
WIND DIR NW NW NW NW W N N N N S S S S S SW SW SW SW
WIND SPD 2 2 4 5 4 0 0 0 0 1 4 8 8 4 4 3 3 3
WIND GUST 13
CLOUDS CL CL CL CL CL CL CL CL CL FW FW SC B1 B1 B1 B2 B1 B1
CLOUDS(%) 3 3 4 5 5 3 2 3 4 6 13 41 52 61 62 81 68 51
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 7
POP 12HR 0 0 0 0 20
RAIN S
MIX HGT <1 2 3 4 5 <1 <1 <1 <1 <1 2 3 2 <1 <1 <1 <1 <1
T WIND DIR NW NW NW W W W S SE SE S S S S S SW SW SW SW
T WIND SPD 12 9 11 9 10 1 1 2 3 4 13 16 18 9 8 6 5 4
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 6 19 34 33 42 1 1 1 2 5 30 51 39 6 5 3 3 4
MAX LVORI 2 2 1 1 1 2 2 2 2 2 2 1 1 2 2 3 3 3
STABILITY G B C C C G G G G B C C D E E F F C
CEILING None None None None None None 7400 5700
STA PRES 29.74 29.76 29.83 29.81 29.80 29.66 29.60 29.55
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 57 30 47 20 28 14 30 8 31
TEMP 54 46 35 31 44 40 33 23 27 23 17 17 28 23 14 9 29 22
DEWPT 34 32 29 27 25 24 19 15 15 12 13 14 18 13 8 6 13 9
RH 46 58 78 85 47 52 56 71 60 62 84 88 66 65 76 87 51 57
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC SC B1 B2 B2 B2 B2 OV OV OV OV B2 B1 SC SC SC FW
POP 12HR 20 20 30 30 70 80 60 20 10
FRZG RAIN S S
RAIN S S S C S
SNOW S C S S C C L D 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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