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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
310 PM EST Wed Feb 21 2018

VAZ024-220900-
RAWS 441631
37.63N  79.51W Elev. 865 ft
310 PM EST Wed Feb 21 2018

Date           02/21/18      Thu 02/22/18            Fri 02/23/18            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                 59          59          50          60          56
TEMP          75 69 66 65 63 59 58 53 50 60 55 52 50 51 52 53 60 59 58 57 56 56
DEWPT         62 60 59 59 60 59 58 53 50 56 53 48 47 50 51 52 55 53 54 54 54 53
MIN/MAX RH                   97          82          97          80          92
RH            64 73 78 81 90100100100100 87 93 86 89 96 96 96 84 80 86 90 93 90
WIND DIR      SW  S  S  S  S SE  S SE SE  E  E  E SE  E  S  S  S  S SW SW SW SW
WIND SPD       9  5  3  3  3  3  5  5  4  5  4  4  3  3  3  4  4  4  3  4  3  3
CLOUDS        SC B1 B1 B2 B2 OV OV OV OV B2 OV OV B2 B2 OV B2 B2 B2 B2 B2 B2 B2
CLOUDS(%)     43 64 67 72 87 98100100100 82100 94 79 75 89 81 76 72 79 78 76 83
VSBY           7  7  7  7  7  2  2  3  2  6  6  7  7  6  6  7  7  7            
POP 12HR                     40          80          50          40          20
DRIZZLE                       ?  ?  ?  ?                                       
RAIN                          C  L  D  D                                       
RAIN SHWRS    IS IS IS IS SC             SC SC SC SC SC SC IS IS IS IS IS IS SC
Obvis                         F PF    PF                                       
LAL            1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1               
HAINES         2  3  3  3  3  3  3  3  3  3  3  3  3  2  2  4  4  4            
MIX HGT        3  2  2  1 <1 <1 <1  2  1  1  1 <1 <1 <1  2  2  2  2            
T WIND DIR    SW SW SW SW  S  S  S  S SE  E  E  E  E  E SE  S SW SW            
T WIND SPD    13 14 13 10  2  5  6  9 10  8  8  4  3  3  5  4 10  9            
DISPERSION       PR VP VP VP             PR VP VP VP             VP VP VP VP   
ADI           42 16 13  9  4 11 14 16 12  7  8  5  4 12 13 13 23 10            
MAX LVORI      1  3  3  4  8  7  5  4  4  5  6  6  6  8  6  7  4  4            
STABILITY      C  E  E  F  F  D  D  D  D  E  D  E  F  D  C  D  D  E            
CEILING               700   600   900  1400   900  1100   900  1100  1000      
STA PRES            28.88 28.87 28.86 28.83 28.88 28.86 28.84 28.74            


Date           02/24 Sun 02/25/18 Mon 02/26/18 Tue 02/27/18 Wed 02/28/18
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       69      54      68      45      61      39      58      36      55
TEMP          65 63 58 57 64 60 51 47 58 54 45 41 55 50 40 37 53 MM
DEWPT         58 56 55 55 56 49 43 41 41 36 37 34 36 33 30 30 36 MM
RH            78 78 90 93 75 67 74 79 53 50 73 76 49 52 67 75 52 MM
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    B2 OV OV OV OV B2 B1 B1 B1 SC SC SC SC FW FW FW FW FW
POP 12HR           40      60      70      30      10      10       5       5       0
RAIN SHWRS    SC SC SC NM NM NM 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