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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
401 PM EST Sat Dec 27 2025
NCZ006-280900-
RAWS 310801
36.37N 79.29W Elev. 580 ft
401 PM EST Sat Dec 27 2025
Date 12/27/25 Sun 12/28/25 Mon 12/29/25 Tue
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 36 51 49 67 26
TEMP 52 45 41 38 37 42 48 51 49 51 55 58 59 63 62 58 44 35 31 28 27
DEWPT 43 40 37 34 33 36 38 40 44 49 54 57 56 55 44 29 20 16 15 13 12
MIN/MAX RH 89 66 100 33 56
RH 71 82 85 85 85 79 68 66 83 93 96 96 90 75 52 33 38 45 51 53 53
WIND DIR E E E E E S S S S S SW SW SW SW W W W W W W W
WIND SPD 8 2 2 2 1 2 3 4 3 5 8 10 11 13 13 13 10 10 8 6 6
WIND GUST 21 24 25 26 26 21 20 17
CLOUDS FW SC B1 B1 OV OV OV OV OV OV OV OV OV B2 B1 B1 FW CL FW FW FW
CLOUDS(%) 20 48 60 63 89 95 96 95 93 91 96 94 90 86 53 53 7 5 6 8 9
VSBY 10 10 10 10 10 10 10 10 10 7 6 7 10 10 10 10 10
POP 12HR 5 20 30 40 5
RAIN S C C C C C C
MIX HGT <1 <1 <1 1 1 1 1 1 <1 <1 2 1 2 3 4 5 3
T WIND DIR E E E E SE S S S S S S SW SW SW W W W
T WIND SPD 11 9 8 5 6 8 6 8 11 9 10 11 18 17 26 28 27
DISPERSION PR VP VP VP VP PR PR FR FR FR PR PR
ADI 8 4 4 3 9 12 11 12 5 6 12 13 33 41 77 91 19
MAX LVORI 3 5 5 6 4 4 3 3 4 8 7 5 4 3 1 1 2
STABILITY E F F F C C C D F E D D D D D D E
CEILING None 1400 1800 900 500 400 1000 None None
STA PRES 29.52 29.52 29.51 29.40 29.27 29.10 29.04 29.10
Date 12/30Wed 12/31/25Thu 01/01/26Fri 01/02/26Sat 01/03/26
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 42 23 49 29 52 25 47 27 49
TEMP 39 31 26 23 45 39 33 32 48 41 32 27 44 36 31 27 46 41
DEWPT 11 10 9 9 13 17 19 21 22 21 19 17 14 17 18 17 22 26
RH 31 41 48 54 27 40 56 63 35 44 58 65 29 45 58 65 38 55
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW CL FW FW FW FW SC B2 B1 FW SC SC B1 SC SC B1 B1 B1
POP 12HR 0 0 0 5 5 0 0 10 20
RAIN 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