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

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327
FOUS54 KSJT 232006
PFWSJT

FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE SAN ANGELO TX
306 PM CDT TUE SEP 23 2014<br>

TXZ170-241015-
MASON RAWS-MASON TX
30.74N  99.19W ELEV. 1463 FT
306 PM CDT TUE SEP 23 2014

DATE           09/23/14      WED 09/24/14            THU 09/25/14            FRI
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                      63          83          59          82          61
TEMP          85 77 69 66 63 63 72 82 83 75 66 62 59 60 70 81 82 75 67 64 61 62
DEWPT         58 59 58 57 57 57 56 53 53 50 52 54 54 54 53 53 54 55 57 58 58 58
MAX/MIN RH                   82          35          83          38          90
RH            40 54 68 74 82 80 57 37 36 42 61 75 83 81 56 38 38 50 70 81 90 88
WIND DIR       E  E  E SE SE  E SE  E  E  E  E SE SE SE SE  E  E  E SE SE SE  E
WIND SPD       7  9  7  4  3  3  4  4  5  4  3  3  3  3  3  5  5  5  4  3  3  3
CLOUDS        B1 SC B1 B1 B1 B1 B1 SC SC SC SC SC SC SC SC SC SC SC SC SC SC B1
CLOUDS(%)     56 49 51 54 55 55 52 48 47 46 44 41 39 36 39 41 41 41 40 39 46 53
POP 12HR                     10           5           5           5           5
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  6  5  5  4  4  5  5  5  5  5  4  4  4  4  3  3  4  4  4  4
MIX HGT        6 <1 <1 <1 <1 <1  2  3  5  3 <1 <1 <1 <1  2  4  5  4 <1 <1 <1 <1
T WIND DIR     E  E SE SE SE  E SE  E  E  E SE SE  E NE SE NE  E  E  E SE  S NE
T WIND SPD     6 11 13  5  3  3  8  5  8  8  5  4  2  2  3  3  5  8  4  3  1  2
SMOKE DISP    PR PR PR PR PR PR PR PR PR PR PR PR PR PR PR PR PR PR PR PR PR PR


DATE           09/26  SAT 09/27/14  SUN 09/28/14  MON 09/29/14  TUE 09/30/14
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          85      63    85      61    86      63    87      66    89
TEMP          84 77   66 64 84 77   64 62 85 78   66 64 86 80   69 67 88 81
DEWPT         58 58   59 57 55 56   58 57 56 56   56 58 58 57   59 60 59 57
MIN/MAX RH       40      84    36      90    36      82    36      82    35
RH            42 52   78 80 37 49   81 85 37 46   70 81 39 46   70 80 38 44
PWIND DIR         E      SE     E      SE     E      SE    SE      SE     S
WIND CHAR       <15     <15   <15     <15   <15     <15   <15     <15   <15
AVG CLOUDS    B1 B1   SC SC SC SC   FW FW FW FW   FW FW FW SC   FW SC SC SC
POP 12HR         10      10    10       5     5       5     5       5     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 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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