NWS

The Rockport Point Forecast Matrix

28.08N  97.05W ELEV. 10 FT
318 AM CDT THU OCT 3 2013

DATE             THU 10/03/13            FRI 10/04/13            SAT 10/05/13
CDT 3HRLY     04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19
UTC 3HRLY     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00

MAX/MIN                      88          77          89          78          89
TEMP          78 77 83 87 88 84 81 80 78 77 83 88 89 85 82 81 78 78 84 88 89 81
DEWPT         74 74 75 74 74 73 74 74 73 73 74 73 73 74 75 74 75 74 75 73 72 72
RH            88 90 77 65 63 70 79 82 85 87 74 61 59 70 79 79 91 88 74 61 57 74
WIND DIR       S  S  S SE SE SE SE SE  S  S  S SE SE SE SE SE  S  S  S SE  E  E
WIND SPD      11  9 10 13 14 14 13 12  9  5  6 10 12 12 11 11  9  6  5  5 10 10
CLOUDS        SC B1 SC SC SC FW SC SC SC SC SC FW FW FW FW SC SC SC SC SC SC SC
POP 12HR                     20           5          10           5          10
QPF 12HR                      0           0           0           0           0
RAIN SHWRS     S  S  S  S  S                                                  S
TSTMS                S  S  S                                                  S
HEAT INDEX          90 95 97 91 86 85       90 95 97 92 88 86       91 96 96 86
MAX HEAT         87    95    97    88          95    97    89    80    96    97


DATE          SUN 10/06/13  MON 10/07/13  TUE 10/08/13  WED 10/09/13
CDT 6HRLY     01 07 13 19   01 07 13 19   01 07 13 19   01 07 13 19
UTC 6HRLY     06 12 18 00   06 12 18 00   06 12 18 00   06 12 18 00

MIN/MAX          67    78      65    82      65    86      72    87
TEMP          78 67 78 74   67 65 80 76   70 65 83 81   76 72 85 83
DEWPT         70 56 54 50   50 48 49 51   56 58 63 65   68 67 70 70
PWIND DIR        NE     N       N    NE       E     E      SE    SE
WIND CHAR        GN    BZ      GN    LT      LT    LT      GN    GN
AVG CLOUDS    B1 B2 B2 SC   SC SC FW CL   CL CL CL FW   FW SC SC SC
POP 12HR         30    10       0     0       0     0       5     5
RAIN SHWRS     S  C
TSTMS          S  S


THE TABLE OF CODES BELOW DESCRIBE THE PFM PRODUCT:
THE FOLLOWING PARAMETERS APPEAR DAILY... MAX/MIN = DAYTIME HIGH AND NIGHTTIME LOW TEMPERATURE TEMP = TEMPERATURE AT 3 HOURLY INTERVALS DEWPT = DEWPOINT AT 3 HOURLY INTERVALS RH = RELATIVE HUMIDITY AT 3 HOURLY INTERVALS WIND DIR = WIND DIRECTION AT 3 HOURLY INTERVALS WIND SPD = WIND SPEED IN MPH AT 3 HOURLY INTERVALS CLOUDS = CLOUD COVER AT 3 HOURLY INTERVALS CL = CLEAR SKIES (0-5% CLOUD COVER) FW = MOSTLY CLEAR SKIES (6-25% CLOUD COVER) SC = PARTLY CLOUDY SKIES (26-50% CLOUD COVER) B1 = MOSTLY CLOUDY SKIES (51-69% CLOUD COVER) B2 = MOSTLY CLOUDY SKIES (70-87% CLOUD COVER) OV = CLOUDY SKIES (88-100% CLOUD COVER) POP 12HR = PROBABILITY OF PRECIPITATION FOR DAY AND NIGHT QPF 12HR = PRECIPITATION AMOUNT IN INCHES FOR DAY AND NIGHT THE FOLLOWING PARAMETERS APPEAR AS NEEDED... WIND GUST = WIND GUST IN MPH AT 3 HOURLY INTERVALS MAX QPF = MAXIMUM AMOUNT OF PRECIPITATION OCCURRING AT ANY ONE LOCATION SNOW 12HR = SNOWFALL AMOUNT IN INCHES FOR DAY AND NIGHT WIND CHILL = HOW IT FEELS BASED ON TEMPERATURE AND WIND EACH 3 HOURS MIN CHILL = LOWEST WIND CHILL OVER LAST 6 HOUR PERIOD HEAT INDEX = HOW IT FEELS BASED ON TEMPERATURE AND RH EACH 3 HOURS MAX HEAT = HIGHEST HEAT INDEX OVER LAST 6 HOUR PERIOD RAIN = PRECIPITATION TYPE FOR EACH 3 HOUR PERIOD IS RAIN RAIN SHWRS = PRECIPITATION TYPE FOR EACH 3 HOUR PERIOD IS RAIN SHOWERS SPRINKLES = PRECIPITATION TYPE FOR EACH 3 HOUR PERIOD IS SPRINKLES TSTMS = PRECIPITATION TYPE FOR EACH 3 HOUR PERIOD IS THUNDERSTORMS DRIZZLE = PRECIPITATION TYPE FOR EACH 3 HOUR PERIOD IS DRIZZLE SNOW = PRECIPITATION TYPE FOR EACH 3 HOUR PERIOD IS SNOW SNOWSHWRS = PRECIPITATION TYPE FOR EACH 3 HOUR PERIOD IS SNOW SHOWERS FLURRIES = PRECIPITATION TYPE FOR EACH 3 HOUR PERIOD IS FLURRIES SLEET = PRECIPITATION TYPE FOR EACH 3 HOUR PERIOD IS ICE PELLETS FRZG RAIN = PRECIPITATION TYPE FOR EACH 3 HOUR PERIOD IS FREEZING RAIN FRZG DRZL = PRECIPITATION TYPE FOR EACH 3 HOUR PERIOD IS FREEZING DRIZZLE EACH PRECIPITATION PARAMETER IS CLASSIFIED AS FOLLOWS... IS = ISOLATED (10-20% COVERAGE) S = SLIGHT (10-20% PROBABILITY) SC = SCATTERED (30-50% COVERAGE) C = CHANCE (30-50% PROBABILITY) NM = NUMEROUS (60-70% COVERAGE) L = LIKELY (60-70% PROBABILITY) O = OCCASIONAL (80-100% PROBABILITY) D = DEFINITE (80-100% PROBABILITY) EC = EXTENSIVE COVERAGE (80-100% PROBABILITY) PA = PATCHY (<25% COVERAGE) AR = AREAS (25-50% COVERAGE) WD = WIDESPREAD (>50% COVERAGE) OBSTRUCTIONS TO VISIBILITY (OBVIS) ARE CLASSIFIED AS FOLLOWS... F = FOG PF = PATCHY FOG F+ = DENSE FOG PF+ = PATCHY DENSE FOG H = HAZE BS = BLOWING SNOW BD = BLOWING DUST AF = VOLCANIC ASH K = SMOKE ADDITIONAL EXTENDED FORECAST PARAMETERS ARE CLASSIFIED AS FOLLOWS... PWIND DIR = PRIMARY WIND DIRECTION FOR EACH 12 HOUR PERIOD WIND CHAR = WIND CHARACTERISTIC FOR EACH 12 HOUR PERIOD LT = LIGHT (< 8 MPH) GN = GENTLE (8-14 MPH) BZ = BREEZY (15-22 MPH) WY = WINDY (23-30 MPH) VW = VERY WINDY (31-39 MPH) SD = STRONG (>40 MPH) AVG CLOUDS = AVERAGE CLOUD COVER FOR EACH 12 HOUR PERIOD MM = MISSING DATA IF A HURRICANE IS EXPECTED THEN THE FOLLOWING APPLIES... 0-24 HOURS BEFORE LANDFALL...THE ACTUAL WIND SPEEDS WILL BE USED. 25-60 HOURS BEFORE LANDFALL...THE CODE "HU" WILL BE USED FOR WINDS AND "HG" FOR WIND GUSTS. 61-120 HOURS BEFORE LANDFALL...THE CODE "HU" WILL ONLY BE USED.

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