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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
931 AM EST Wed Jan 21 2026
NCZ001-212100-
RAWS 310142
36.40N 81.46W Elev. 4608 ft
931 AM EST Wed Jan 21 2026
Date Wed 01/21/26 Thu 01/22/26 Fri 01/23/26
UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00
EST 3hrly 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19
MAX/MIN TEMP 35 29 39 29 34
TEMP 28 34 34 30 33 33 31 33 33 37 39 33 31 30 31 30 30 33 33 27
DEWPT 8 8 12 13 18 25 31 27 26 17 14 12 22 21 23 23 22 23 21 18
MAX/MIN RH 31 100 31 73 62
RH 42 33 39 49 53 72100 78 75 44 35 41 69 69 72 75 72 66 61 68
WIND DIR SW S SW SW W W W W W W W W W W W NW NW NW NW NW
WIND SPD 11 13 14 13 16 19 24 23 18 13 10 9 9 9 10 10 10 10 10 14
CLOUDS FW FW SC B1 B2 B1 B1 B1 SC FW SC SC B1 B2 B2 B2 OV B2 B2 B2
CLOUDS(%) 8 22 50 59 72 68 67 62 42 24 28 35 55 71 73 86 91 82 71 79
VSBY 10 10 10 10 10 10 8 6 7 10 10 10 10 6 6 5 5 6 6 6
POP 12HR 0 10 10 30 30
FRZG RAIN S C C C
RAIN S C
SNOW C S S S
MIX HGT <1 2 1 <1 <1 <1 <1 <1 1 2 1 <1 <1 <1 <1 <1 <1 2 2 <1
T WIND DIR S S S S SW SW W W W W W NW NW NW W SW SW W N NW
T WIND SPD 11 14 12 10 8 8 11 17 16 13 13 5 4 3 1 2 3 2 11 12
DISPERSION FR GD GD GD PR PR PR FR GD
ADI 13 24 19 9 7 7 10 19 22 25 27 4 4 3 1 2 4 4 22 11
MAX LVORI 2 2 2 2 2 3 7 3 3 2 2 2 3 3 3 3 3 3 2 3
STABILITY D D D D D D D D D D C E D D D C D D D D
CEILING None 4400 1000 None None 21800 14200 7800 700
STA PRES 26.82 26.79 26.74 26.78 26.77 26.78 26.76 26.79 26.77
Date Sat 01/24/26Sun 01/25/26Mon 01/26/26Tue 01/27/26
UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
EST 6hrly 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19
MIN/MAX TEMP 16 18 12 23 10 17 4 25
TEMP 21 17 16 15 14 16 17 22 18 11 14 12 7 5 22 17
DEWPT 10 9 11 10 10 13 17 17 14 6 8 4 -2 -4 7 7
RH 62 70 80 80 84 88100 81 84 80 76 70 66 65 52 64
WIND SPD <15 <15 <15 <15 15> 15> 15> 15>
AVG CLOUDS B2 B2 OV OV OV OV OV B2 B2 B2 B1 SC SC FW FW FW
POP 12HR 30 80 100 80 40 10 5 5
SLEET S S
SNOW S C L D D D D 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