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

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592
FOUS54 KSJT 202007
PFWSJT

FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE SAN ANGELO TX
307 PM CDT MON OCT 20 2014<br>

TXZ170-211015-
MASON RAWS-MASON TX
30.74N  99.19W ELEV. 1463 FT
307 PM CDT MON OCT 20 2014

DATE           10/20/14      TUE 10/21/14            WED 10/22/14            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                      57          80          55          81          57
TEMP          79 72 65 61 59 57 65 76 80 72 64 60 58 55 64 76 81 73 65 62 60 57
DEWPT         58 59 58 58 57 56 57 58 56 55 54 53 53 52 52 52 52 51 53 54 55 55
MAX/MIN RH                   96          44          92          36          93
RH            49 63 78 89 93 96 75 54 44 55 71 79 85 92 66 43 37 46 65 75 84 93
WIND DIR       E  E  E  E SE  E SE SE SE  E  E  E  E  E  E SE  E  E  E SE SE SE
WIND SPD       4  3  3  2  1  1  3  5  5  5  3  3  2  3  3  8  9  4  3  3  3  2
CLOUDS        B1 SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B2 B1 B1 B1 B2 B2 B2 B2 B2
CLOUDS(%)     60 50 54 56 63 60 57 55 58 55 58 61 66 70 64 57 64 71 71 71 72 73
POP 12HR                      5          10           5           5          10
QPF 12HR                      0           0           0           0           0
RAIN SHWRS                                                                   IS
TSTMS                                                                        IS
LAL            1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  2
HAINES         3  4  3  4  4  4  4  5  4  4  4  4  4  5  5  5  5  3  3  3  3  3
MIX HGT        6  3 <1 <1 <1 <1  2  5  6  3 <1 <1 <1 <1  2  5  7  3 <1 <1 <1 <1
T WIND DIR     E  E SE SE  S NE SE  E SE  E SE SE SE  E SE SE SE  E  E  E SE  S
T WIND SPD    10  5  4  3  1  1  5  8  9  6  5  4  3  2  6 13 13  5  5  4  9  3
SMOKE DISP    FR PR PR PR PR PR PR PR FR PR PR PR PR PR PR FR GD PR PR PR PR PR


DATE           10/23  FRI 10/24/14  SAT 10/25/14  SUN 10/26/14  MON 10/27/14
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          81      57    85      54    85      55    85      56    82
TEMP          77 73   62 57 80 75   60 54 79 75   61 55 80 75   62 56 77 72
DEWPT         56 55   54 55 56 53   53 54 55 52   52 52 52 50   55 56 58 56
MIN/MAX RH       42      92    36      99    34      90    31     100    43
RH            48 53   75 92 44 47   77 99 44 45   72 90 38 41   79100 52 57
PWIND DIR        SE      NE     N       E     S       S     S       S    SW
WIND CHAR       <15     <15   <15     <15   <15     <15   <15     <15   <15
AVG CLOUDS    B1 B1   SC SC FW FW   FW FW FW FW   FW FW FW FW   FW FW FW FW
POP 12HR         20      10     5       0     0       0     0       5     5
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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