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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
431 PM EST Fri Nov 21 2025
NCZ003-220900-
RAWS 310301
36.48N 80.86W Elev. 1300 ft
431 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 54 72 40 65 36
TEMP 60 57 57 55 56 66 70 66 57 52 48 43 41 56 64 63 51 45 41 39 37
DEWPT 59 57 57 55 55 60 56 54 51 48 45 42 39 42 39 39 39 37 36 35 33
MIN/MAX RH 100 60 99 38 90
RH 96100100100 96 81 61 65 80 86 89 96 92 59 40 41 63 73 82 85 85
WIND DIR N S SW SW SW SW NW NW NW NW N NW NW NW NW NW NW NW NW NW NW
WIND SPD 0 1 1 2 2 4 5 5 2 2 1 1 2 2 4 4 2 2 1 1 1
CLOUDS B2 B1 B1 B2 B2 B1 FW SC FW FW FW FW FW FW FW CL CL CL FW FW FW
CLOUDS(%) 83 63 59 77 77 54 19 26 18 16 19 18 12 10 6 4 5 4 7 10 18
VSBY 10 7 4 4 3 6 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 20 30 5 0 0
RAIN SHWRS IS IS IS IS IS IS
Obvis PF PF PF PF PF
MIX HGT <1 <1 <1 <1 <1 2 5 3 <1 <1 <1 <1 <1 2 4 4 <1
T WIND DIR S SW W SW W W NW NW NW NW NW NW NW NW NW NW NW
T WIND SPD 4 4 5 4 3 4 18 13 13 12 9 5 6 8 10 13 9
DISPERSION VP VP VP VP VP VP VP VP VP VP VP VP
ADI 2 2 3 2 3 9 75 43 6 6 4 3 7 23 40 49 4
MAX LVORI 8 9 9 9 8 4 1 1 4 5 6 8 6 2 1 1 3
STABILITY F F F F C D C C G G G G B B C C G
CEILING 500 400 None None None None None None None
STA PRES 28.05 28.00 28.02 28.07 28.15 28.17 28.22 28.19
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 61 41 58 48 65 35 53 29 50
TEMP 60 52 44 43 56 55 52 53 64 53 43 36 52 41 33 29 48 38
DEWPT 35 36 37 38 48 51 51 51 52 41 33 27 22 24 21 20 21 24
RH 39 54 76 82 74 86 96 93 65 64 67 69 31 50 61 69 34 57
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 FW FW FW SC SC SC
POP 12HR 0 10 40 60 40 20 5 5 10
RAIN C C C L C S 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