National Weather Service United States Department of Commerce

Print This Forecast (Printer-Friendly)

EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
940 PM EST Wed Dec 2 2020

NCZ001-030900-
RAWS 310141
36.40N  81.29W Elev. 3009 ft
940 PM EST Wed Dec 2 2020

Date           12/02/20      Thu 12/03/20            Fri 12/04/20            Sat
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                 22          50          32          48          37
TEMP                28 26 27 24 38 46 48 43 40 38 37 33 42 46 46 43 43 42 40 38
DEWPT               15 11  9  8 12 15 18 24 23 22 22 24 31 37 40 41 41 41 39 36
MIN/MAX RH                   57          26          68          53          96
RH                  58 52 46 50 34 28 30 47 50 52 54 69 65 71 79 93 93 96 96 92
WIND DIR            NW NW  W  W SW  S  S SW SW SW SW SW  S  S  S  S SW  W NW NW
WIND SPD             6  3  3  3  3  5  5  3  3  4  5  4  5  8  5  5  5  6 10 11
CLOUDS              CL CL CL CL FW FW SC SC B1 B2 B2 B2 B2 B2 B2 OV OV OV OV B2
CLOUDS(%)            0  0  1  2  9 17 31 45 68 74 83 80 77 85 85100100 95 95 76
VSBY                 7  7  7  7  7  7  7  7  7  7  7  7  7  7  7  7            
POP 12HR                      0           0          10          60          80
RAIN                                                  C  C  L  L  D  D  L  L  C
LAL                  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1               
HAINES               5  5  5  5  5  5  5  5  5  5  5  3  5  3  3  3            
MIX HGT             <1 <1 <1 <1 <1 <1  1 <1 <1 <1 <1 <1 <1  1  1 <1            
T WIND DIR          NW NW  W  W SW SW  W SW SW SW SW SW SW SW SW  S            
T WIND SPD           6  3  3  3  3  8 10  3  3  4  5  4 25 25 14  9            
DISPERSION          PR VP VP             VP VP VP PR             PR PR PR FR   
ADI                  3  1  1  3  4  6 16  2  2  3  4  5 28 40 20  8            
MAX LVORI            2  2  2  2  2  2  2  2  2  2  2  3  2  3  3  5            
STABILITY            F  G  G  B  B  C  C  F  F  E  E  D  D  D  D  D            
CEILING                    None  None  None  6200  4700  3400   300   200      
STA PRES                  27.39 27.39 27.34 27.31 27.26 27.22 27.11            


Date           12/05 Sun 12/06/20 Mon 12/07/20 Tue 12/08/20 Wed 12/09/20
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       44      26      39      25      39      25      39      26      45
TEMP          41 35 31 27 38 32 27 26 38 31 28 25 38 32 29 28 44 36
DEWPT         34 27 24 21 22 22 22 22 23 22 20 19 22 22 22 21 25 25
RH            76 72 75 78 52 66 81 85 54 69 71 78 52 66 75 75 47 64
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    B2 B1 B1 B1 SC FW SC SC SC FW SC SC FW FW SC FW FW FW
POP 12HR           30       5       5       5       5       5       0       0       0
RAIN           C                                                   
RAIN SHWRS    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