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

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912
FOUS54 KSJT 262101
PFWSJT

FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE SAN ANGELO TX
301 PM CST MON JAN 26 2015<br>

TXZ170-271015-
MASON RAWS-MASON TX
30.74N  99.19W ELEV. 1463 FT
301 PM CST MON JAN 26 2015

DATE           01/26/15      TUE 01/27/15            WED 01/28/15            THU
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                      41          78          45          78          48
TEMP          75 68 53 47 45 41 51 72 78 72 57 51 49 45 54 73 78 73 59 54 51 48
DEWPT         33 34 35 36 37 35 38 38 39 41 41 41 40 39 41 43 43 43 44 45 45 44
MAX/MIN RH                   81          24          81          29          87
RH            21 28 50 64 73 79 60 29 25 33 56 69 72 79 61 34 29 34 57 72 79 87
WIND DIR       W  W  W  W  W  W  W  W SW SE SE SW SW SW SW  S  S  S  S SW SW  W
WIND SPD       8  3  3  3  3  3  3  3  3  3  3  3  3  3  3 10 10  8  5  7  4  3
CLOUDS        FW FW SC SC SC SC SC SC FW FW FW FW FW FW FW FW FW FW FW FW FW SC
CLOUDS(%)     19 20 27 35 31 27 27 27 24 21 21 18 18 21 21 20 20 20 20 25 25 35
POP 12HR                      0           0           0           0           0
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         5  5  5  5  5  5  5  5  5  5  5  5  5  5  5  6  5  5  6  6  6
MIX HGT        4 <1 <1 <1 <1 <1 <1  2  3 <1 <1 <1 <1 <1 <1  2  5 <1 <1 <1 <1 <1
T WIND DIR     W  W  W  W  W  W  W  N NE  E SE  S SW SW  W SW SW  S  S SW  W NW
T WIND SPD    13  5  6  8  8  6  5  4  1  5  4  4  5  4  3 14 18  8  6  5  5  4
SMOKE DISP    FR PR PR PR PR PR PR PR PR PR PR PR PR PR PR PR GD PR PR PR PR PR


DATE           01/29/15  FRI 01/30/15  SAT 01/31/15  SUN 02/01/15  MON 02/02/15
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          69      40    52      42    51      37    48      31    51
TEMP          66 63 45   40 50 50 44   42 50 48 40   37 46 44 34   31 48 48
DEWPT         44 40 36   32 34 38 40   41 45 44 39   36 37 31 28   25 29 29
MIN/MAX RH       37      76    51     100    78      99    56      82    42
RH            45 43 70   74 53 62 86   96 85 85 95   95 71 59 78   79 47 47
PWIND DIR         N      NE     E       E     E      NE     N       N     N
WIND CHAR       <15     <15   <15     <15   <15     <15   <15     <15   <15
AVG CLOUDS    SC B1 B1   B1 B2 B2 B2   B2 B2 B2 B2   B2 B2 B2 B1   SC SC SC
POP 12HR          0       5    20      50    60      40    30      10    10
RAIN SHWRS                  IS IS SC   SC NM NM SC   SC SC SC

$$

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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