Fire Weather Point Forecast Matrices
Mason RAWS
Issued by NWS San Angelo, TX

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227
FOUS54 KSJT 250954
PFWSJT

FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE SAN ANGELO TX
454 AM CDT SAT OCT 25 2014<br>

TXZ170-252215-
MASON RAWS-MASON TX
30.74N  99.19W ELEV. 1463 FT
454 AM CDT SAT OCT 25 2014

DATE             SAT 10/25/14            SUN 10/26/14            MON 10/27/14
UTC 3HRLY     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00
CDT 3HRLY     04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19

MAX/MIN                      86          58          87          58          85
TEMP             57 70 83 86 79 68 64 60 58 72 84 87 80 69 64 60 58 70 82 85 79
DEWPT            57 58 59 57 55 55 55 55 56 57 54 52 51 52 52 55 57 59 58 57 56
MIN/MAX RH                   37          93          30          99          40
RH              100 65 44 38 44 62 73 85 93 60 36 30 37 56 66 85 96 67 45 40 46
WIND DIR         SW SW SW  S SE  S  S  S SW  S  S  S  S  S  S  S  S  S  S  S  S
WIND SPD          3  5  7  5  4  3  3  3  3  5 10 10  5  3  4  4  5  9 12 12  7
CLOUDS           CL FW FW CL CL CL CL CL CL CL CL CL CL FW SC B1 B2 B1 SC FW FW
CLOUDS(%)         4  6  7  5  3  4  5  5  5  5  5  5  5 18 30 51 72 64 27 25 23
POP 12HR                      0           0           0           0           5
QPF 12HR                      0           0           0           0           0
OBVIS            PF
LAL               1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1
HAINES            4  5  5  4  4  4  4  5  5  5  5  4  3  4  5  5  5  5  5  5  5
MIX HGT          <1  2  4  3  2  1 <1 <1 <1  2  4  3  2  1 <1 <1 <1  2  4  3  2
T WIND DIR       SW SW SW  S SE  S SW SW SW SW  S  S  S  S  S  S  S  S  S  S  S
T WIND SPD        6 17  9  6  5  5  5  5  5 14 16 17  8  6  8  9 10 14 21 18 16
SMOKE DISP       PR PR PR FR PR PR PR PR PR PR GD GD GD PR PR PR PR PR GD GD


DATE          TUE 10/28/14  WED 10/29/14  THU 10/30/14  FRI 10/31/14
UTC 6HRLY     06 12 18 00   06 12 18 00   06 12 18 00   06 12 18 00
CDT 6HRLY     01 07 13 19   01 07 13 19   01 07 13 19   01 07 13 19

MIN/MAX          61    82      58    74      56    80      55    76
TEMP          66 61 80 76   62 58 73 70   59 56 78 74   59 55 74 70
DEWPT         58 61 61 58   57 54 55 56   56 55 57 53   53 49 46 43
MAX/MIN RH      100    47      90    51      96    42      83    33
RH            79100 52 53   85 86 54 61   90 96 49 48   81 80 37 39
PWIND DIR         S     E      NE    NE      SE     S      NE    NE
WIND CHAR       <15   <15     <15   <15     <15   <15     <15   <15
AVG CLOUDS    SC B1 B1 B1   B1 B2 B2 B1   B1 B1 B1 SC   SC SC SC FW
POP 12HR         10    10      20    20      10    10      10     5
RAIN SHWRS                  IS IS IS IS
TSTMS                       IS IS IS IS

$$

BELOW IS A WEATHER ELEMENT KEY FOR THIS PRODUCT

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 HUMIDITY
RH(%)...............................RELATIVE HUMIDITY
WIND DIR(8 POINT COMPASS)...........20 FT. WIND DIRECTION
WIND SPD(MPH).......................20 FT. WIND SPEED
WIND GUST(MPH)......................20 FT. WIND GUST
WIND CHILL..........................WIND CHILL TEMPERATURE
HEAT INDX...........................HEAT INDEX
CLOUDS(CAT).........................CLOUD COVER CATEGORY
     EXAMPLE: CL = CLEAR; FW = FEW; SC = SCATTERED;
              B1 = MOSTLY CLOUDY; B2 = CONSIDERABLE CLOUDS; OV = OVERCAST
CLOUDS(%)...........................CLOUD COVER AS A PERCENTAGE
POP 12HR(%).........................PROBABILITY FOR ACCUMULATING PRECIPITATION
QPF 12HR(IN)........................LIQUID EQUIVALENT PRECIPITATION AMOUNT
WEATHER...
     TYPE...
       RAIN...........RAIN
       RAIN SHWRS.....RAIN SHOWERS
       TSTMS..........THUNDERSTORMS
       DRIZZLE........DRIZZLE
       SNOW...........SNOW
       SNOWSHWRS......SNOW SHOWERS
       SLEET..........SLEET
       FLURRIES.......FLURRIES
       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
OBVIS...............................OBSTRUCTION TO VISIBILITY
     TYPE...
       F..............FOG
       PF.............PATCHY FOG
       F+.............DENSE FOG
       H..............HAZE
       BS.............BLOWING SNOW
       K..............SMOKE
       BD.............BLOWING DUST
       AF.............VOLCANIC ASHFALL
LAL(CAT)............................LIGHTNING ACTIVITY LEVEL
HAINES(CAT).........................HAINES INDEX
10K WIND DIR(8 POINT COMPASS).......10000 FOOT WIND DIRECTION
10K WIND SPD(MPH)...................10000 FOOT WIND SPEED
MIX HGT(THOUSANDS OF FT AGL)........MIXING HEIGHT
     EXAMPLE: 6 = 6000 FEET; 12 = 12000 FEET; <1 = LESS THAN 1000 FEET
T WIND DIR(8 POINT COMPASS).........TRANSPORT WIND DIRECTION
T WIND SPD(MPH).....................TRANSPORT WIND SPEED
SMOKE DISP(CAT(KT-FT))...................SMOKE DISPERSION CATEGORY
     EXAMPLE: PR = POOR; FR = FAIR; GD = GOOD; VG = VERY GOOD; EX = EXCELLENT
FOSBERG.............................FOSBERG FIRE WEATHER INDEX
WATCH/WARNING/ADVISORY...
     EXAMPLE: W = WARNING; Y = ADVISORY; A = WATCH
     IN EFFECT FOR THE INDICATED HOUR

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).......................20 FT. WIND SPEED
     EXAMPLE: <15 = LESS THAN 15 MPH; 15> = 15 MPH OR GREATER
AVE CLOUDS(CAT).....................AVERAGE CLOUD COVER CATEGORY
POP 12HR(%).........................PROBABILITY FOR ACCUMULATING PRECIPITATION
WEATHER...
     SEE DAY 1 THROUGH 3 WEATHER DESCRIPTIONS



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