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

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142
FOUS54 KSJT 222025
PFWSJT

FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE SAN ANGELO TX
325 PM CDT FRI MAY 22 2015<br>

TXZ128-231015-
HAMBY RAWS-CALLAHAN TX
32.50N  99.62W ELEV. 1900 FT
325 PM CDT FRI MAY 22 2015

DATE           05/22/15      SAT 05/23/15            SUN 05/24/15            MON
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                      66          75          65          82          65
TEMP          71 72 69 67 67 66 69 72 75 72 70 69 67 65 72 78 82 79 71 67 66 65
DEWPT         63 65 65 65 65 65 66 65 65 65 65 65 64 64 65 65 64 63 62 59 63 63
MAX/MIN RH                   97          71          97          54          93
RH            76 79 87 93 93 97 90 79 71 79 84 87 90 97 80 64 55 58 73 74 90 93
WIND DIR      SE SE SE SE  S SE SE  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S
WIND SPD      10 10 10 12 12 11 14 15 12 12 10 10 10  9 10 10 10  8  9  8 10 10
CLOUDS        OV B2 OV OV OV OV OV OV OV OV OV OV OV OV B2 B2 B1 SC SC SC SC B1
CLOUDS(%)     93 87 90 92 95 97 93 89 90 90 92 94 93 91 85 79 59 40 40 39 39 51
POP 12HR                     30          80          80          50          10
QPF 12HR                   0.07        0.86        1.46        0.30           0
RAIN SHWRS    SC SC SC SC SC  O  O  O  O  O  O  O  O SC SC SC SC IS IS IS IS SC
TSTMS         IS SC SC SC SC  O  O  O  O  O  O  O  O SC SC SC SC IS IS IS IS SC
LAL            2  3  3  3  3  5  5  5  5  5  5  5  5  3  3  3  3  1  1  1  1  3
HAINES         3  3  3  3  4  3  3  3  3  3  3  3  3  3  3  3  4  4  5  4  4  5
MIX HGT        2  2 <1  1  1 <1  2  4  3  3  1  1  1  1  3  5  7  6 <1 <1 <1 <1
T WIND DIR     S SE SE  S  S  S  S  S  S  S  S  S  S  S SW  S  S  S  S  S  S  S
T WIND SPD    19 20 19 20 21 20 28 24 19 19 14 16 16 13 18 17 19 20 19 18 20 21
SMOKE DISP    FR FR PR PR PR PR FR GD FR FR PR PR PR PR FR GD VG VG PR PR PR PR
FLASH FLOOD                      A  A  A  A  A  A  A  A


DATE           05/25  TUE 05/26/15  WED 05/27/15  THU 05/28/15  FRI 05/29/15
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          84      65    83      66    86      68    85      68    83
TEMP          80 81   68 65 79 80   68 66 82 83   71 68 81 82   70 68 80 80
DEWPT         66 63   62 63 65 63   65 65 68 66   68 67 67 65   66 66 67 65
MIN/MAX RH       51      93    53      97    53      97    52      93    57
RH            61 54   81 93 62 56   89 97 63 57   90 97 63 57   88 93 65 60
PWIND DIR         S       S     S       S     S       S     S       S     S
WIND CHAR       <15     <15   <15     <15   <15     <15   <15     <15   <15
AVG CLOUDS    B1 B1   B1 B1 B1 SC   SC B1 B1 B1   SC B1 B1 B1   B1 B1 B2 B1
POP 12HR         30      50    20      20    20      20    30      20    40
RAIN SHWRS    SC SC   SC SC IS IS   IS IS IS IS   IS IS SC SC   IS IS SC SC
TSTMS         SC SC   SC SC IS IS   IS IS IS IS   IS IS SC SC   IS IS 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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