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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
401 PM EST Thu Dec 4 2025
WVZ043-050900-
RAWS 465401
37.53N 81.00W Elev. 2725 ft
401 PM EST Thu Dec 4 2025
Date 12/04/25 Fri 12/05/25 Sat 12/06/25 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 27 34 30 41 26
TEMP 27 27 28 28 28 28 32 33 32 32 32 31 32 36 40 39 33 31 29 27 27
DEWPT 24 24 26 27 27 27 28 31 31 31 31 31 31 33 32 32 31 29 27 25 26
MIN/MAX RH 100 86 100 71 96
RH 88 88 92 96 96 96 85 92 96 96 96100 96 89 73 76 92 92 92 92 96
WIND DIR N NE SE SE SE SE SE SE SE S SW W W W W W W W W SW S
WIND SPD 2 2 2 5 5 5 4 2 2 2 2 2 2 4 6 5 3 2 2 2 2
CLOUDS B2 OV OV OV OV OV OV B2 OV OV OV B2 B2 B2 B1 B1 B1 SC SC B1 B1
CLOUDS(%) 77 93 95 93 94 95 95 87 91 88 91 81 84 82 57 58 56 43 45 52 65
VSBY 10 8 1 1 1 2 9 8 6 6 8 7 5 6 10 10 10 10 8 10 10
POP 12HR 100 60 5 5 5
SNOW C D L L
MIX HGT <1 1 <1 <1 <1 1 1 <1 <1 <1 <1 <1 <1 2 3 2 <1
T WIND DIR N E SE SE SE SE S S N SW SW W W SW W W W
T WIND SPD 3 4 6 11 11 12 5 2 0 3 6 5 8 8 12 12 12
DISPERSION VP VP VP PR VP VP VP VP VP VP VP VP
ADI 2 2 3 8 13 19 8 2 0 2 3 3 6 13 29 27 6
MAX LVORI 7 6 6 6 5 5 5 7 8 8 9 9 8 5 3 3 6
STABILITY F F F E D D D C F F F F C D D D F
CEILING 500 100 500 700 700 700 700 10500 None
STA PRES 27.73 27.68 27.65 27.57 27.54 27.50 27.52 27.51
Date 12/07Mon 12/08/25Tue 12/09/25Wed 12/10/25Thu 12/11/25
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 41 25 30 19 39 28 42 30 35
TEMP 40 34 31 25 30 23 21 20 38 34 31 29 41 38 36 31 34 30
DEWPT 33 32 29 23 20 17 16 17 24 25 25 26 30 30 32 31 28 22
RH 76 92 92 92 66 77 81 88 57 69 78 88 65 73 85100 78 72
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B2 B2 B2 SC SC B1 B1 SC SC B1 B2 B1 B2 B2 B2 B2
POP 12HR 20 40 10 10 10 20 20 60 30
RAIN S C S L L C C
SNOW C S S L C C
$$
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