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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 AM EST Fri Nov 21 2025
NCZ003-220900-
RAWS 310301
36.48N 80.86W Elev. 1300 ft
231 AM EST Fri Nov 21 2025
Date 11/20/25 Fri 11/21/25 Sat 11/22/25 Sun
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 66 55 70 39
TEMP 55 51 57 63 65 60 58 57 57 57 65 68 65 56 51 46 42 40
DEWPT 52 53 58 60 61 60 58 56 56 55 59 56 52 49 46 43 40 37
MIN/MAX RH 100 76 100 61 95
RH 90108104 90 87100100 96 96 93 81 65 63 77 83 89 93 89
WIND DIR N N S S SW SE W SW SW W W NW NW NW N N NW NW
WIND SPD 0 0 1 4 3 1 2 2 2 2 3 5 5 2 2 2 2 2
CLOUDS OV OV OV OV B2 B1 B1 B1 B2 B2 B1 SC SC FW FW FW FW FW
CLOUDS(%) 100100100 94 77 66 56 58 75 72 56 48 27 23 18 17 14 11
VSBY 8 7 7 8 10 9 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 70 50 40 30 5
RAIN L C S C C
RAIN SHWRS IS SC SC
MIX HGT <1 <1 <1 2 <1 <1 <1 <1 <1 <1 2 4 3 <1 <1 1 <1 <1
T WIND DIR N NW NW SW SW S SW SW SW W W NW NW NW N N NW NW
T WIND SPD 1 1 1 3 4 4 4 4 4 8 11 18 14 14 13 11 6 8
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 1 1 1 6 5 2 2 2 2 6 28 70 47 7 6 5 3 8
MAX LVORI 7 10 8 4 4 8 9 8 8 6 3 1 1 4 4 6 6 5
STABILITY D D D D C F F F F C C C C G G G G B
CEILING 1900 2000 500 7200 None None None None
STA PRES 28.14 28.08 28.04 27.99 28.01 28.05 28.15 28.18
Date 11/23Mon 11/24/25Tue 11/25/25Wed 11/26/25Thu 11/27/25
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 64 37 64 43 61 51 66 37 53
TEMP 62 53 42 38 63 53 46 46 58 57 53 53 65 56 48 39 52 41
DEWPT 38 39 37 34 39 42 40 41 51 53 53 53 53 48 40 30 25 23
RH 41 59 82 85 41 66 79 83 77 86100100 65 74 74 70 35 48
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW CL FW FW FW SC B1 B2 B2 B2 B2 B2 B1 B1 B1 B1 SC SC
POP 12HR 0 0 0 10 40 60 40 30 10
RAIN C C L L C 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