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

NCZ006-220900-
RAWS 310801
36.37N  79.29W Elev. 580 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                 20          39          17          43          23
TEMP                27 23 21 20 31 38 38 28 24 21 19 18 31 40 42 33 26 24 24 25
DEWPT               16 15 14 14 16 14 13 15 14 14 13 13 16 15 16 18 17 17 17 18
MIN/MAX RH                   76          35          82          33          76
RH                  63 71 74 77 53 37 35 58 65 74 77 80 53 36 34 53 68 74 74 74
WIND DIR             N  N  N  N NE  N NE  E  E  E  N  N  E SE  S  S  S SW SW  W
WIND SPD             5  4  3  3  5  3  3  2  2  1  0  0  2  2  2  1  1  1  2  2
CLOUDS              FW CL CL FW CL CL CL FW CL CL CL CL CL CL CL CL FW FW SC SC
CLOUDS(%)            7  2  3  6  5  4  2 12  5  2  4  3  2  5  2  3  6 16 34 49
VSBY                10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10            
POP 12HR                      0           0           0           0          10
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  3  4  3 <1 <1 <1 <1 <1  2  3  2 <1            
T WIND DIR           N  N  N  N  N  N  N NE  E  E  E  E  E SE SE SE            
T WIND SPD          12 10 10 10  6  4  3  2  3  3  4  3  4  4  4  3            
DISPERSION          PR VP VP             VP VP VP VP             VP VP VP VP   
ADI                  6  5  5 11 25 20 14  1  2  2  2  4 11 17 11  2            
MAX LVORI            3  3  3  4  2  2  2  3  3  3  5  4  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            29.68 29.73 29.80 29.79 29.86 29.88 29.90 29.82            


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       53      30      49      31      50      35      53      40      55
TEMP          50 44 34 30 47 43 36 32 48 43 36 35 50 47 42 41 53 49
DEWPT         31 34 33 30 38 37 35 32 39 39 36 35 41 41 38 37 42 42
RH            48 68 96100 71 79 96100 71 86100100 71 79 86 85 66 77
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    SC SC SC SC B1 B1 B2 B1 B1 B1 B1 B1 B2 B2 B2 B2 B2 B2
POP 12HR            5      10      10      30      20      30      40      50      40
RAIN SHWRS                      IS SC IS IS IS SC SC SC SC SC SC SC
SNOWSHWRS                          SC IS                           

$$


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