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

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769
FOUS54 KSJT 042040
PFWSJT

FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE SAN ANGELO TX
240 PM CST SUN DEC 4 2016<br>

TXZ170-051015-
MASON RAWS-MASON TX
30.74N  99.19W ELEV. 1463 FT
240 PM CST SUN DEC 4 2016

DATE           12/04/16      MON 12/05/16            TUE 12/06/16            WED
UTC 3HRLY     21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12
CST 3HRLY     15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06

MIN/MAX                      43          53          42          63          41
TEMP          52 48 46 45 44 43 45 51 53 49 46 44 43 42 46 58 63 54 48 46 43 41
DEWPT         48 46 45 44 43 43 44 46 48 47 45 42 42 39 43 43 42 42 43 41 42 40
MAX/MIN RH                  100          80         100          46         100
RH            86 93 96 96 96100 96 83 83 93 96 93 96 89 89 57 46 64 83 83 96 96
WIND DIR      NE  N  N  N NE  N  N NW  W  W SW SW  W  W NW NW NW  N NE  E SE SE
WIND SPD      10  6  6  5  6  5  3  3  6  4  3  5  5  5  6  8  5  3  3  3  3  3
CLOUDS        OV OV OV OV OV OV OV B2 B2 SC FW CL CL CL FW FW FW SC SC SC SC SC
CLOUDS(%)     98 98100 95 99 96 88 85 82 50  8  2  2  2  6 13  8 31 34 29 41 40
POP 12HR                     90          90           5           0           5
QPF 12HR                   0.45        0.32           0           0           0
RAIN SHWRS     L  D  D  D  D  D  D  D  D
TSTMS          S  S  S  S  S  S  S  S  S
LAL                     2     2     1     1     1     1     1     1     1     1
HAINES                  3     3     3     2     5     5     5     5     5     5
MIX HGT              1200   400  2600  3800   700   400  1400  2000   500   300
T WIND DIR             NE    NE     N     W    SW    SW     W    NW     N     E
T WIND SPD             18    16     4    13     8    10    11    10     5     2
SMOKE DISP             PR    PR    PR    FR    PR    PR    PR    PR    PR    PR


DATE           12/07/16  THU 12/08/16  FRI 12/09/16  SAT 12/10/16  SUN 12/11/16
UTC 6HRLY     18 00 06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00
CST 6HRLY     12 18 00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18

MAX/MIN          61      30    40      24    45      30    59      39    62
TEMP          56 49 37   30 38 34 27   24 40 39 33   30 52 51 43   39 57 53
DEWPT         49 47 32   24 19 18 18   17 15 22 24   30 39 43 39   38 39 42
MIN/MAX RH       62     100    41      74    33     100    51      96    46
RH            77 93 82   78 46 51 68   74 36 50 69  100 61 74 86   96 51 66
PWIND DIR        SW       N     N       N    SE       S     S      SW     W
WIND CHAR       <15     <15   <15     <15   <15     <15   <15     <15   <15
AVG CLOUDS    SC B1 B1   B1 B1 SC FW   FW FW FW FW   SC SC FW FW   FW FW FW
POP 12HR          5      10     5       0     0       0     0       0     0

$$

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 DIR DEG(DEGREES)...............20 FT. WIND DIRECTION IN TENS OF DEGREES
                                    RELATIVE TO DUE NORTH.
     EXAMPLE: 09 = 90 DEGREES = EAST; 18 = 180 DEGREES = SOUTH;
              27 = 270 DEGREES = WEST; 36 = 360 DEGREES = NORTH
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...
       S..............SLIGHT CHANCE
       C..............CHANCE
       L..............LIKELY
       O..............OCCASIONAL
       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
MIX HGT(FT AGL).....................MIXING HEIGHT
T WIND DIR(8 POINT COMPASS).........TRANSPORT WIND DIRECTION
T WIND SPD(MPH).....................TRANSPORT WIND SPEED
ADI (INDEX).........................ATMOSPHERIC DISPERSION INDEX
DISPERSION..........................LDSI
MAX LVORI...........................LVORI
STA PRES (INCHES MERCURY)...........STATION PRESSURE
ADI (INDEX).........................ATMOSPHERIC DISPERSION INDEX
CEILING (FT)........................CEILING
STABILITY (CAT).....................PASQUILL TURNER STABILITY
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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