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

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948
FOUS54 KSJT 021916
PFWSJT

FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE SAN ANGELO TX
216 PM CDT MON MAY 2 2016<br>

TXZ170-031015-
MASON RAWS-MASON TX
30.74N  99.19W ELEV. 1463 FT
216 PM CDT MON MAY 2 2016

DATE           05/02/16      TUE 05/03/16            WED 05/04/16            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
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                      45          76          50          83          53
TEMP          61 62 53 49 46 45 59 70 75 73 61 55 52 50 65 76 82 79 66 59 55 53
DEWPT         48 47 49 49 46 45 47 47 46 46 47 48 48 48 49 49 47 47 48 49 49 48
MAX/MIN RH                  100          34          93          28          84
RH            62 58 87 99100100 64 44 36 38 60 77 86 93 56 39 29 32 53 69 80 84
WIND DIR       N  N NE  N  E  N NE NE NE  E  E  E  W  W SW NW NW  N  E NE SE SW
WIND SPD      11  6  2  2  1  1  3  5  5  4  2  1  1  2  3  6  4  4  3  1  2  2
CLOUDS        B2 B1 SC FW SC FW CL FW FW FW FW FW FW FW FW FW CL CL CL CL CL CL
CLOUDS(%)     78 62 33 22 35 18  3 13  6  8 13 14 24 14 11  7  5  2  2  1  2  3
POP 12HR                      0           0           5           0           0
QPF 12HR                      0           0           0           0           0
LAL                     1     1     1     1     1     1     1     1     1     1
HAINES                  3     3     5     5     5     6     6     5     5     4
MIX HGT              2000   400  4400  5300  3000   200  7100  7700  4700   200
T WIND DIR             NE    NE    NE    NE    SE     W     W    NW    NE    SW
T WIND SPD              9     9    10    10     5     4     5    11     4     4
SMOKE DISP             PR    PR    PR    FR    PR    PR    GD    GD    PR    PR


DATE           05/05 FRI 05/06/16 SAT 05/07/16 SUN 05/08/16 MON 05/09/16
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            84      56      83      60      81      62      83      62      85
TEMP          78 80 62 56 78 80 65 60 77 79 66 62 79 80 66 62 81 82
DEWPT         49 49 53 53 53 53 56 58 60 60 61 61 62 60 62 61 60 57
MIN/MAX RH
RH            36 34 72 89 42 39 74 94 56 53 85 98 57 51 87 98 49 43
PWIND DIR           S      SE       S      SE       S       S       S       S       S
WIND CHAR         <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    FW FW FW FW SC FW FW SC B1 B1 B2 B2 B2 B1 B1 B1 B1 B1
POP 12HR            0       0       0       5      10      30      20      30      40

$$

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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