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

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917
FOUS54 KSJT 041050
PFWSJT

FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE SAN ANGELO TX
450 AM CST WED MAR 4 2015<br>

TXZ170-042215-
MASON RAWS-MASON TX
30.74N  99.19W ELEV. 1463 FT
450 AM CST WED MAR 4 2015

DATE             WED 03/04/15            THU 03/05/15            FRI 03/06/15
UTC 3HRLY     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00
CST 3HRLY     03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18

MAX/MIN                      58          25          35          22          45
TEMP             53 56 58 56 36 32 28 27 26 28 32 35 34 28 25 24 22 28 39 44 42
DEWPT            52 56 54 48 36 31 25 24 22 21 20 20 20 20 20 19 19 20 21 23 25
MIN/MAX RH                   75          99          55          89          42
RH               95100 86 75 99 96 88 87 85 75 61 55 57 72 82 82 89 71 49 44 51
WIND DIR          W SW NE  N  N  N  N  N  N  N  N  N NE NE NE  N  N NE NE  E  E
WIND SPD          3  3  7 11 18 19 17 17 16 15 15 12 10  7  3  3  3  3  3  3  3
CLOUDS           OV OV OV OV OV OV OV OV B2 B1 SC SC SC FW FW FW FW SC SC SC SC
CLOUDS(%)        94 95 95 98100100100 91 82 65 48 38 28 25 23 23 24 29 35 41 48
POP 12HR                     60          90          10           5           5
QPF 12HR                   0.16        0.27           0           0           0
FRZG RAIN                     D  D
RAIN                       L  D
RAIN SHWRS       NM NM NM
SLEET                         D  D  D  D
SNOW                                D  D
TSTMS            IS IS IS
LAL               2  2  2  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1
HAINES            2  2  3  3  2  2  2  2  2  2  4  4  4  4  4  4  4  4  4  4  4
MIX HGT          <1 <1  3  2  2  2  2  2  2  2  2  3  3 <1 <1 <1 <1  1  3  3  2
T WIND DIR        W NW NE NE  N  N  N  N  N  N  N NE NE  N NE NE NE NE NE NE  E
T WIND SPD        4  5  6 11 27 31 33 33 32 32 25 24 19  9  5  5  4  9  8  6  6
SMOKE DISP       PR PR PR PR FR FR FR FR FR FR FR GD FR PR PR PR PR PR PR PR PR


DATE               SAT 03/07/15  SUN 03/08/15  MON 03/09/15  TUE 03/10/15
UTC 6HRLY     06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00
CST 6HRLY     00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18

MIN/MAX            32    52      35    61      40    64      43    66
TEMP          35   32 47 50 39   35 54 58 46   40 58 61 49   43 60 63
DEWPT         24   26 29 31 32   33 38 40 40   38 43 42 42   42 45 44
MAX/MIN RH         79    43      92    44      91    45      95    47
RH            65   79 50 49 76   92 54 51 78   91 57 50 78   95 58 50
PWIND DIR          SE    SE       S    NW       S     E      SE    SE
WIND CHAR         <15   <15     <15   <15     <15   <15     <15   <15
AVG CLOUDS    B1   B2 B2 B1 B1   B1 SC SC SC   SC SC FW SC   SC SC SC
POP 12HR           10    10      20    20       5     5      10    20
RAIN SHWRS                  IS   IS 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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