National Weather Service Weather Forecast Office

• Home
• Site Map
• News
• Organization
• Search for: NWS All NOAA 

The Rockport Point Forecast Matrix

28.08N  97.05W ELEV. 10 FT
325 PM CST SUN MAR 3 2013

DATE           03/03/13      MON 03/04/13            TUE 03/05/13            WED
CST 3HRLY     15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
UTC 3HRLY     21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12

MIN/MAX                      60          73          61          70          44
TEMP             68 63 62 61 60 64 71 73 70 65 64 62 62 61 66 68 63 54 52 49 46
DEWPT            50 53 55 57 58 57 58 58 58 61 60 60 58 51 45 41 38 36 34 32 31
RH               52 70 78 87 93 78 63 59 66 87 87 93 87 70 47 37 39 50 50 52 55
WIND DIR          S  S  S  S  S  S  S  S  S  S  S  S SW  W  N  N  N  N  N  N  N
WIND SPD         17 19 20 19 20 23 24 24 23 24 23 18 14 20 24 21 18 17 17 17 14
CLOUDS           FW FW FW FW FW FW SC SC SC FW FW SC SC SC SC FW CL CL CL FW FW
POP 12HR                      0           0           0          10           0
QPF 12HR                      0           0           0           0           0


DATE           03/06/13  THU 03/07/13  FRI 03/08/13  SAT 03/09/13  SUN 03/10/13
CST 6HRLY     12 18 00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18
UTC 6HRLY     18 00 06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

MAX/MIN          65      49    69      58    71      62    74      65    73
TEMP          61 56 52   50 65 63 60   59 68 66 64   63 71 69 67   66 71 68
DEWPT         31 38 41   44 49 51 54   56 57 57 59   60 61 63 64   63 66 64
PWIND DIR        NE       E     E      SE    SE      SE    SE       S    SW
WIND CHAR        GN      LT    GN      GN    BZ      BZ    BZ      BZ    GN
AVG CLOUDS    FW FW SC   B1 SC B1 B1   B1 B1 B1 B1   B1 B2 B2 B1   B1 B2 B2
POP 12HR          0       0     5      10    10      10    10      10    20
RAIN SHWRS                                                             S  S
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.