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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1101 PM EST Tue Dec 9 2025
VAZ046-100900-
RAWS 441101
37.39N 78.80W Elev. 804 ft
1101 PM EST Tue Dec 9 2025
Date 12/09/25 Wed 12/10/25 Thu 12/11/25 Fri
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 26 45 29 42 24
TEMP 30 31 33 37 41 42 42 39 36 33 30 37 40 39 31 27 25 26 27
DEWPT 26 27 28 33 35 36 37 34 30 26 23 23 21 21 20 19 19 20 21
MIN/MAX RH 90 74 82 45 79
RH 85 85 82 85 79 79 82 82 79 75 75 56 46 48 63 71 78 78 78
WIND DIR SW SW SW SW SW SW SW W W W W W W W W W W W SW
WIND SPD 6 8 9 12 13 11 10 10 9 9 8 10 10 9 5 5 4 4 4
WIND GUST 26 26 23 21 21 20 16
CLOUDS B1 B1 B1 B2 B2 B2 FW FW FW FW FW FW FW FW FW FW SC B1 B2
CLOUDS(%) 62 65 64 82 87 75 15 21 17 14 9 9 11 9 19 25 46 68 70
VSBY 9 9 9 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 10 0 0 5
SNOW S
MIX HGT <1 <1 <1 1 1 1 <1 <1 <1 <1 <1 4 4 3 <1
T WIND DIR SW SW SW SW SW SW SW W W W W NW NW W W
T WIND SPD 9 13 17 16 14 16 12 12 12 14 12 24 18 17 5
DISPERSION PR PR FR FR PR PR PR PR VP VP
ADI 8 12 19 23 22 21 8 8 8 10 10 85 70 53 3
MAX LVORI 6 5 5 4 3 3 4 4 4 4 4 1 1 1 3
STABILITY D D D D D D E E E E C C C C F
CEILING 9300 500 None None None None None None
STA PRES 29.14 28.97 28.88 28.93 29.06 29.22 29.26
Date 12/12Sat 12/13/25Sun 12/14/25Mon 12/15/25Tue 12/16/25
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 40 30 48 36 44 15 36 21 42
TEMP 38 35 33 31 46 38 38 39 43 29 21 17 33 27 25 23 40 33
DEWPT 27 29 29 28 33 32 34 35 25 16 10 7 11 14 14 15 20 22
RH 64 78 85 88 60 79 85 85 49 58 62 64 39 57 62 71 44 63
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B1 B1 SC SC SC B1 SC FW FW FW FW FW SC SC SC SC
POP 12HR 30 10 0 20 20 5 0 10 10
RAIN C S S
SNOW 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