National Weather Service United States Department of Commerce

Print This Forecast (Printer-Friendly)

EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
244 PM EST Fri Dec 15 2017

NCZ001-160900-
RAWS 310142
36.40N  81.46W Elev. 4608 ft
244 PM EST Fri Dec 15 2017

Date           12/15/17      Sat 12/16/17            Sun 12/17/17            Mon
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                 21          41          30          48          41
TEMP          26 23 23 22 22 21 28 37 39 36 34 33 31 32 40 46 48 41 42 43 44 41
DEWPT         17 16 15 15 16 17 19 20 16 10  9  9  5  9 14 19 25 32 36 37 40 39
MIN/MAX RH                   85          33          39          32          93
RH            68 74 71 74 77 84 68 50 39 33 35 36 32 37 34 34 40 70 79 79 86 92
WIND DIR       W NW NW NW NW  W  W  W  W  W  W  W  W  W SW SW SW SW  W  W  W  W
WIND SPD      23 26 28 25 24 23 21 16 14 16 13  8  8  6  8  8 10  9 12 11 13 11
WIND GUST     43 43 43 40 37 35 33                                             
CLOUDS        B1 SC SC SC SC FW FW CL CL CL FW SC SC B1 B2 B2 B2 B2 B2 B2 B2 B2
CLOUDS(%)     56 29 45 44 32 25 17  4  3  4 14 27 49 69 78 81 82 80 79 78 78 78
VSBY          10 10  6  6 10 10 10 10 10 10                                    
POP 12HR                     10           0           0          30          30
FLURRIES            SC SC                                                      
RAIN SHWRS                                                 SC SC SC SC SC SC IS
LAL            1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1               
HAINES         2  2  2  2  2  3  4  4  4  4  4  5  5  4  4  4  3  3            
MIX HGT        1  1  1  1 <1 <1 <1  1  1 <1 <1 <1 <1 <1 <1 <1 <1 <1            
T WIND DIR    NW NW NW NW NW NW  W  W  W  W  W  W  W  W SW  W  W SW            
T WIND SPD    35 42 42 37 33 21 19 21 23 16 18 14 11  8  6 19 21 17            
DISPERSION       GD GD GD GD             GD FR PR PR             PR FR FR FR   
ADI           64 54 54 51 38 47 42 46 43 14 12  5  7  8  8 33 47  8            
MAX LVORI      1  3  3  3  3  4  3  1  1  2  2  2  2  2  2  1  1  3            
STABILITY      D  D  D  D  D  D  D  D  D  D  D  E  D  D  D  D  D  D            
CEILING              None  None  None  None  None  None  7200  1100   500      
STA PRES            26.62 26.67  27.0 27.01 27.07 27.07 27.07 27.03            


Date           12/18 Tue 12/19/17 Wed 12/20/17 Thu 12/21/17 Fri 12/22/17
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      44      53      35      46      33      50      40      52
TEMP          51 49 47 44 51 45 41 35 44 41 38 34 47 46 43 41 50 46
DEWPT         44 43 44 42 43 38 33 21 19 19 21 23 31 32 35 37 42 42
RH            77 80 89 93 74 76 73 56 36 41 50 64 53 58 73 85 74 86
WIND SPD          <15     <15     15>     15>     15>     <15     <15     <15     <15
AVG CLOUDS    B2 B2 B2 B2 B2 B2 B1 SC FW FW FW FW FW SC SC B1 B2 OV
POP 12HR           20      30      40      10       0      10       5      10      30
RAIN SHWRS    IS IS    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