National Weather Service United States Department of Commerce

Print This Forecast (Printer-Friendly)

EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
731 PM EST Sat Dec 21 2024

NCZ019-220900-
RAWS 312001
36.23N  81.32W Elev. 2380 ft
731 PM EST Sat Dec 21 2024

Date           12/21/24      Sun 12/22/24            Mon 12/23/24            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                 19          36          21          39          27
TEMP                25 22 20 19 27 35 35 27 25 24 22 22 29 37 38 31 27 27 28 30
DEWPT               13 12 10 10 11 10 11 12 13 12 12 13 15 16 17 17 17 17 17 20
MIN/MAX RH                   68          34          68          41          66
RH                  60 65 64 67 50 35 36 53 60 60 65 68 55 42 42 56 65 65 63 66
WIND DIR             N  N  N  N NE SE SE  E  N  E NW  W  S  S  S SW  W  W NW NW
WIND SPD             4  3  2  2  2  2  3  1  0  1  1  1  2  3  2  1  1  2  2  2
CLOUDS              CL CL CL CL CL FW CL FW CL FW CL CL CL CL CL CL CL FW FW SC
CLOUDS(%)            5  4  3  4  3  7  0 19  4  9  4  3  3  4  1  3  2  7 16 27
VSBY                10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10            
POP 12HR                      0           0           0           0           5
LAL                  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1               
HAINES               4  4  4  4  4  4  4  4  4  4  4  4  4  4  4  4            
MIX HGT             <1 <1 <1 <1  2  3  3 <1 <1 <1 <1 <1  2  3  2 <1            
T WIND DIR           N  N  N  N NW NW  S SE SE SE SE  S  S  S  S SW            
T WIND SPD          12  9  4  2  2  3  2  2  1  1  1  1  4  5  5  2            
DISPERSION          VP VP VP             VP VP VP VP             VP VP VP VP   
ADI                  6  4  2  2  6 14  7  1  1  1  1  1 11 18 15  1            
MAX LVORI            3  3  3  3  2  2  2  2  3  3  4  3  2  2  2  3            
STABILITY            G  G  G  B  B  B  B  G  G  G  G  B  B  B  B  G            
CEILING              None  None  None  None  None  None  None  None  None      
STA PRES            28.11 28.15 28.20 28.19 28.26 28.28 28.29 28.24            


Date           12/24Wed 12/25/24Thu 12/26/24Fri 12/27/24Sat 12/28/24
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       52      33      48      35      49      38      48      41      52
TEMP          52 40 36 33 47 41 37 35 47 43 39 39 46 43 41 41 49 47
DEWPT         31 31 30 31 36 36 35 35 39 38 37 37 39 37 37 37 40 40
RH            44 70 79 92 65 82 92100 74 82 92 92 76 79 85 85 71 76
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    SC SC SC SC B1 B1 B2 B1 B1 SC B2 B2 B2 B2 B2 B2 B2 B2
POP 12HR            5       5      20      30      20      30      40      50      40
RAIN SHWRS                   IS IS SC IS IS    SC SC SC SC SC SC SC

$$


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
LAL(CATEGORY).......................Lightning Activity Level
HAINES(CATEGORY)....................Haines Index
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