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

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487
FOUS54 KSJT 010943
PFWSJT

FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE SAN ANGELO TX
443 AM CDT FRI AUG 1 2014<br>

TXZ170-012215-
MASON RAWS-MASON TX
30.74N  99.19W ELEV. 1463 FT
443 AM CDT FRI AUG 1 2014

DATE             FRI 08/01/14            SAT 08/02/14            SUN 08/03/14
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                      89          67          92          66          93
TEMP             68 77 87 89 87 79 74 71 67 78 89 92 89 80 75 71 66 78 90 93 90
DEWPT            64 64 61 59 58 59 61 65 64 65 62 58 58 60 62 63 63 62 61 59 58
MIN/MAX RH                   36          90          32          89          32
RH               86 64 42 37 39 50 64 81 90 64 40 32 35 50 64 76 89 58 38 32 34
WIND DIR          N  N  N  N NE NE NE NE NE NE NE NE NE NE  E NE NE NE NE NE  E
WIND SPD          4  5  7  8  7  5  5  3  3  5  7  9  9  5  4  2  2  5  7 10  9
CLOUDS           SC SC SC SC SC SC B1 B1 B1 SC SC SC SC SC SC SC SC SC SC SC FW
CLOUDS(%)        28 37 46 47 47 49 51 54 56 50 43 43 41 39 38 37 35 32 32 29 24
POP 12HR                     10          10           5           5           5
QPF 12HR                      0           0           0           0           0
LAL               1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1
HAINES            3  2  3  3  4  3  4  4  4  4  4  4  4  4  4  3  3  3  3  3  4
MIX HGT           1  4  6  7  7 <1 <1 <1 <1  3  6  8  8 <1 <1 <1 <1  4  8  8  8
T WIND DIR       NE  N  N  N  N NE NE  E NE NE NE NE NE NE NE NE  N NE NE NE NE
T WIND SPD        9  6  8  6  6  5 10  9  5 10 11 14 13  5  5  4  3 12 16 16 14
SMOKE DISP       PR PR FR FR FR PR PR PR PR PR FR VG GD PR PR PR PR FR VG VG VG


DATE          MON 08/04/14  TUE 08/05/14  WED 08/06/14  THU 08/07/14
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          67    94      68    96      70    97      71    97
TEMP          76 67 91 91   77 68 93 93   79 70 94 94   80 71 94 94
DEWPT         60 63 61 58   62 64 59 60   63 66 61 60   65 68 63 61
MAX/MIN RH       87    31      87    30      87    30      90    32
RH            59 87 37 33   61 87 33 33   59 87 34 32   61 90 36 34
PWIND DIR         E     E      SE    SE      SE     S       S     S
WIND CHAR       <15   <15     <15   <15     <15   <15     <15   <15
AVG CLOUDS    SC SC SC SC   SC SC SC SC   FW SC SC SC   FW SC SC SC
POP 12HR          5     5       5     5       5     5      10    10

$$

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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