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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
731 PM EST Fri Nov 21 2025
NCZ001-220900-
RAWS 310142
36.40N 81.46W Elev. 4608 ft
731 PM EST Fri Nov 21 2025
Date 11/21/25 Sat 11/22/25 Sun 11/23/25 Mon
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 52 56 39 51 35
TEMP 54 54 53 54 53 53 51 48 46 44 41 39 43 50 48 42 40 39 37 36
DEWPT 52 52 53 53 52 50 48 46 44 42 38 36 34 34 34 34 34 33 30 28
MIN/MAX RH 100 86 96 53 80
RH 93 93100 96 96 89 89 93 93 93 89 89 70 54 58 73 79 79 75 72
WIND DIR W W W W W W NW NW NW NW NW NW NW NW NW NW NW NW NW NW
WIND SPD 10 14 18 20 17 14 10 9 10 11 11 11 9 10 9 9 9 8 5 4
CLOUDS SC B1 B2 B2 B2 SC B1 B1 B1 SC SC FW FW FW CL CL CL FW FW FW
CLOUDS(%) 47 65 79 80 78 42 59 54 51 48 32 24 12 8 5 4 4 8 14 23
VSBY 8 7 5 4 7 10 10 8 9 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 30 40 5 0 0
RAIN SHWRS IS SC IS SC SC
MIX HGT <1 <1 <1 <1 2 2 2 <1 <1 <1 <1 <1 1 2 2 <1
T WIND DIR W W W W NW NW NW NW NW NW NW NW NW NW NW NW
T WIND SPD 10 13 9 10 24 19 17 12 12 12 9 9 11 16 18 10
DISPERSION FR GD GD PR FR FR FR PR PR PR PR
ADI 9 12 8 11 41 39 32 11 11 11 6 10 17 41 39 7
MAX LVORI 6 5 8 6 4 4 4 5 5 5 5 5 3 1 1 4
STABILITY D D D D D D D D D D E D C C C E
CEILING None 300 300 300 None None None None None
STA PRES 26.64 26.60 26.62 26.64 26.71 26.72 26.77 26.75
Date 11/24Tue 11/25/25Wed 11/26/25Thu 11/27/25Fri 11/28/25
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 51 40 50 47 51 31 39 25 37
TEMP 50 42 42 42 48 47 49 49 48 41 36 31 38 30 28 26 35 28
DEWPT 31 31 32 36 44 45 48 48 45 35 28 21 16 18 16 15 17 18
RH 48 65 67 79 86 93 96 96 89 79 72 66 40 60 60 62 47 66
WIND SPD <15 <15 <15 <15 <15 15> 15> 15> <15
AVG CLOUDS FW SC B1 B2 OV OV B2 B2 B2 B1 SC SC SC FW FW SC SC SC
POP 12HR 5 10 50 70 40 20 10 5 10
RAIN C C L 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