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

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017
FOUS54 KSJT 012011
PFWSJT

FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE SAN ANGELO TX
311 PM CDT SAT AUG 1 2015<br>

TXZ170-021015-
MASON RAWS-MASON TX
30.74N  99.19W ELEV. 1463 FT
311 PM CDT SAT AUG 1 2015

DATE           08/01/15      SUN 08/02/15            MON 08/03/15            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                      73          99          73          99          73
TEMP          98 97 84 80 77 73 86 95 99 98 84 80 77 73 86 95 99 98 85 80 77 73
DEWPT         62 61 59 59 60 61 64 60 58 56 58 60 63 64 65 58 59 58 62 64 67 68
MAX/MIN RH                   66          25          73          26          84
RH            31 31 43 49 56 66 49 31 26 26 41 51 61 73 50 29 27 27 47 58 71 84
WIND DIR       E  E SE SE SE  S  S SE SE SE SE  S  S  S  S SE SE SE SE  S  S  S
WIND SPD      10  9  4  3  3  3  4  4  6  8  5  5  4  3  6  6  9 10  8  8  9  6
CLOUDS        B1 SC SC SC SC SC SC SC SC SC FW SC SC SC SC SC SC SC FW FW SC SC
CLOUDS(%)     55 50 42 42 40 38 35 45 49 48 21 29 31 33 34 34 31 27 23 19 26 32
POP 12HR                     10          10           5           0           0
QPF 12HR                      0           0           0           0           0
RAIN SHWRS     S
TSTMS          S
LAL                     1     1     1     1     1     1     1     1     1     1
HAINES                  5     5     4     5     5     5     5     5     5     4
MIX HGT              3400   100  5900  7800  4000   200  4900  7100  4500   400
T WIND DIR             SE     S    SE    SE    SE     S     S    SE    SE     S
T WIND SPD              5     3     4     6     6     5    10    11     8    13


DATE           08/04 WED 08/05/15 THU 08/06/15 FRI 08/07/15 SAT 08/08/15
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            98      76      99      76     101      76     101      76     101
TEMP          94 97 82 76 95 98 82 76 97100 83 76 97100 83 76 97100
DEWPT         62 59 65 68 66 60 64 68 64 58 63 67 61 58 65 69 62 57
MIN/MAX RH
RH            35 29 57 76 38 29 55 76 34 25 51 74 31 25 55 79 33 25
PWIND DIR           S       S       S       S       S       S       S       S       S
WIND CHAR         <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    SC FW FW FW SC FW FW FW FW FW FW FW FW FW FW FW FW FW
POP 12HR            0       0       0       0       0       0       0       0       5

$$

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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