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

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449
FOUS54 KSJT 042027
PFWSJT

FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE SAN ANGELO TX
327 PM CDT SAT JUL 4 2015<br>

TXZ170-051130-
MASON RAWS-MASON TX
30.74N  99.19W ELEV. 1463 FT
327 PM CDT SAT JUL 4 2015

DATE           07/04/15      SUN 07/05/15            MON 07/06/15            TUE
UTC 3HRLY     21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12
CDT 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                      72          89          70          90          72
TEMP          91 87 80 76 74 72 80 86 89 85 78 74 72 70 80 87 90 86 80 76 74 72
DEWPT         66 68 70 70 70 70 69 66 66 67 69 71 70 69 68 65 66 66 67 70 70 69
MAX/MIN RH                   92          47          96          44          91
RH            44 53 71 81 86 92 68 51 47 55 73 88 92 96 67 48 44 51 66 82 88 91
WIND DIR       S  S SE  S  S  S  S  S  S  S SE  S  S  S  S  S  S  S  S  S  S  S
WIND SPD      10 11  9  9  5  8 10 14 14 14 10 10 10 10 15 16 17 16 11 12 11 10
CLOUDS        B1 SC SC B1 B1 B2 B2 SC SC SC SC B2 B2 B1 B1 SC SC SC SC B1 B1 B1
CLOUDS(%)     54 41 47 53 66 72 72 48 48 46 46 70 70 62 62 39 39 34 34 63 63 66
POP 12HR                     10          10          10           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  1
HAINES         3  3  3  3  4  4  4  3  3  3  3  4  4  5  4  4  4  4  4  4  4
MIX HGT        5  5  3  2  1 <1  2  4  4  5  4  2  1 <1  2  4  5  6  4  2  1 <1
T WIND DIR     S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S
T WIND SPD    19 23 26 27 19 12 18 25 26 26 29 29 21 16 24 33 33 31 32 32 25 19
SMOKE DISP    GD VG GD FR PR PR PR GD VG VG GD FR PR PR FR VG VG EX VG FR PR PR


DATE           07/07  WED 07/08/15  THU 07/09/15  FRI 07/10/15  SAT 07/11/15
UTC 6HRLY     18 00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18 00
CDT 6HRLY     13 19   01 07 13 19   01 07 13 19   01 07 13 19   01 07 13 19

MAX/MIN          92      72    92      72    92      70    92      71    92
TEMP          89 88   76 72 89 88   76 72 89 87   74 70 88 87   75 71 88 88
DEWPT         66 65   69 69 64 63   68 68 60 60   67 68 63 61   66 67 63 61
MIN/MAX RH       43      90    39      88    34      93    37      87    37
RH            47 48   79 90 44 44   77 88 38 40   77 93 44 41   74 87 43 41
PWIND DIR         S       S     S       S     S       S     S       S     S
WIND CHAR       <15     <15   <15     <15   <15     <15   <15     <15   <15
AVG CLOUDS    B1 B1   B1 B2 B1 SC   SC SC B1 SC   FW FW SC FW   FW FW SC FW
POP 12HR         10      20    10       5     0       0     5       0     0
RAIN SHWRS            IS IS
TSTMS                 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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