Decoding the FWC Guidance

ZCZC NMCFWCTUL

FOUS14 KWBC 030340                                               - BULLETIN HEADER
TUL SC    NGM MOS GUIDANCE  12/03/97  0000 UTC                   - STATION, ROUTING, MODEL, INITIAL DATE AND TIME IN UTC
DAY /DEC   3             /DEC   4                /DEC  5         - VALID MONTH AND DAY [UTC]
HOUR   06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  - VALID HOUR [UTC] 
MX/MN                    45          29          50          26  - MAXIMUM OR MINIMUM TEMPERATURE FOR DAYTIME/NIGHTTIME PERIOD F
TEMP   44 42 41 40 42 43 39 36 34 33 31 34 44 48 43 37 33 30 27  - TEMPERATURE AT SPECIFIED TIME F
DEWPT  43 42 41 39 37 34 32 30 28 27 26 26 25 23 23 23 22 21 19  - DEW POINT TEMPERATURE AT SPECIFIED TIME F
CLDS   OV OV OV OV OV OV OV SC CL CL CL CL CL CL CL CL CL CL CL  - OPAQUE CLOUD COVER FORECAST FOR SPECIFIED TIME [SEE BELOW]
WDIR   14 35 31 31 32 31 32 30 25 20 21 20 25 32 34 34 34 34 34  - WIND DIRECTION [ X 10 = COMPASS DIRECTION] FOR SPECIFIED TIME
WSPD   04 04 05 05 11 12 07 05 04 06 04 09 10 11 07 06 07 08 06  - WIND SPEED [KTS] FOR SPECIFIED TIME
POP06        78    37     0     1     0     4     2     1     1  - PROBABILITY OF PRECIPITATION FOR 6-H PERIOD ENDING AT SPECIFIED TIME
POP12                    31           3           6           2  - PROBABILITY OF PRECIPITATION FOR 12-H PERIOD ENDING AT SPECIFIED TIME
QPF         1/    0/    0/0   0/    0/0   0/    0/0   0/    0/0  - PRECIPITATION AMOUNT FORECAST FOR 6- AND 12-H PERIODS [SEE BELOW]
TSV06     38/ 0 17/ 0  3/ 0  2/ 0  1/ 0  1/ 0  3/ 4  0/ 4  2/ 5  - THUNDERSTORM/CONDITIONAL SEVERE T-STORM PROB. [FOR 6-H PDS ENDING AT TIME]
TSV12           42/ 0        4/ 0        2/ 0        3/ 4        - THUNDERSTORM/CONDITIONAL SEVERE T-STORM PROB. [FOR 12-H PDS ENDING AT TIME]
PTYPE   R  R  R  R  R  R  R  S  S  R  R     R     R     S     S  - CONDITIONAL PRECIPITATION TYPE FORECAST FOR SPECIFIED TIME [SEE BELOW]
POZP    0  0  5  0  0  0  1  6  2  0 11     0     0     0     2  - CONDITIONAL PROBABILITY OF FREEZING PRECIP. OR ICE PELLETS, IF PRECIPITATING
POSN    0  2  9 20 25 30 33 47 41 15 11    20    33    43    61  - CONDITIONAL PROBABILITY OF SNOW FOR SPECIFIED TIME, IF PRECIPITATING
SNOW        0/    0/    0/0   0/    0/0   0/    0/0   0/    0/0  - SNOW AMOUNT FOR 6- AND 12-H PERIODS [SEE BELOW]
CIG     3  2  2  2  4  4  5  6  7  7  7     7     7              - CEILING HEIGHT FORECAST FOR SPECIFIED TIME [SEE BELOW]
VIS     3  3  3  3  5  5  5  5  5  5  5     5     5              - VISIBILITY FORECAST FOR SPECIFIED TIME [SEE BELOW]
OBVIS   F  F  F  F  F  N  N  N  N  N  N     N     N              - OBSTRUCTION TO VISION FORECAST FOR SPECIFIED TIME [SEE BELOW]


CLDS

  CL = CLEAR
  SC = SCATTERED
  BK = BROKEN
  OV = OVERCAST


PTYPE

  R = LIQUID
  Z = FREEZING OR ICE PELLETS
  S = SNOW


QPF FORMAT "A/B"
  A - VALUE FOR 6-H PERIOD
        0 = NO PRECIPITATION
        1 = 0.01 - 0.09 INCHES
        2 = 0.10 - 0.24 INCHES
        3 = 0.25 - 0.49 INCHES
        4 = 0.50 - 0.99 INCHES
        5 = Greater than or equal to 1.00 INCH
  B - VALUE FOR 12-H PERIOD
        0 = NO PRECIPITATION
        1 = 0.01 - 0.09 INCHES
        2 = 0.10 - 0.24 INCHES
        3 = 0.25 - 0.49 INCHES
        4 = 1.00 - 1.99 INCHES
        5 = Greater than or equal to 2.00 INCHES


SNOW FORMAT "A/B"
  A - VALUE FOR 6-H PERIOD
        0 = NO SNOW
        1 = TRACE - < 2 INCHES
        2 = Greater than or equal to 2 INCHES
  B - VALUE FOR 12-H PERIOD
        0 = NO SNOW
        1 = TRACE - < 2 INCHES
        2 = 2 - < 4 INCHES
        4 = 4 - < 6 INCHES
        6 = Greater than or equal to 6 INCHES


OBVIS
  H = HAZE
  F = FOG
  N = NO HAZE OR FOG


CIG  
  1 = > 200 FEET
  2 = 200 - 400 FEET
  3 = 500 - 900 FEET
  4 = 1000 - 3000 FEET
  5 = 3100 - 6500 FEET
  6 = 6600 - 12000 FEET
  7 = > 12000 FEET


VIS
  1 = < 1/2 MILE
  2 = 1/2 - 7/8 MILES
  3 = 1 - 2 3/4 MILES
  4 = 3 - 5 MILES
  5 = > 5 MILES

Decoding the MRF Guidance


ZCZC NMCFMRTSA



FOXS68 KWBC 030000                                                              - BULLETIN HEADER

MRF-BASED OBJECTIVE GUIDANCE  12/03/97  0000 UTC                                - MODEL, INITIAL DATE AND TIME IN UTC


TUL   WED 03| THU 04| FRI 05| SAT 06| SUN 07| MON 08| TUE 09| WED 10| CLIMO     - STATION ID, VALID DATE [UTC] AND CLIMATIC NORMALS
MN/MX     43| 28  48| 21  42| 27  46| 31  46| 36  45| 39  52| 36  50| 32  52    - MIN AN DMAX TEMPERATURE F FOR LOCAL NIGHTTIME/DAYTIME PD.

POP12     42| 24   0|  0   0|  7   2|  3  16| 22  32| 30  34| 30  27| 14  14    - PROBABILITY OF PRECIP. FOR 0000-1200 AND 1200-0000 UTC PDS.
CPOS      24| 21  31| 53  75| 32  30| 13  21|  9  11| 11  10| 12  16| 24  24    - COND. PROBABILITY OF SNOW FOR 0000-1200 & 1200-0000 UTC PDS.
CLDS      83| 45  21| 20  23| 23  35| 37  56| 61  69| 66  67| 59  61| 45  49    - MEAN OPAQUE CLOUDINESS % FOR 0000-1200 AND 1200-0000 UTC PDS.
WIND       7|  7   8|  7   8|  5   7|  7  10|  9  11|  8  10|  9   9|  7   9    - MEAN WIND SPEED [KTS] FOR 0000-1200 AND 1200-0000 UTC PERIODS
POP24       |   24  |    0  |    8  |   17  |   41  |   45  |   42  |   22      - PROBABILITY OF PRECIPITATION FOR 0000-0000 UTC PERIOD


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Updated: Thursday, August 26,1999