NWS

The Port Aransas Point Forecast Matrix

27.82N  97.08W ELEV. 5 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                      61          72          62          68          48
TEMP             66 63 62 62 61 65 70 72 69 65 64 63 62 62 65 67 62 56 55 53 50
DEWPT            50 54 55 57 57 57 58 58 58 60 60 60 59 53 48 44 42 39 37 36 35
RH               56 72 78 84 87 75 66 61 68 84 87 90 90 72 54 43 48 53 51 52 56
WIND DIR          S  S  S  S  S  S  S  S  S  S  S  S  S  W  N  N  N  N  N  N  N
WIND SPD         19 20 21 21 21 24 24 25 24 25 24 21 17 23 25 23 19 18 18 18 18
CLOUDS           FW FW FW FW FW FW SC SC SC FW FW SC SC SC SC FW CL CL CL FW CL
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          63      55    66      60    69      63    72      66    74
TEMP          60 57 56   55 63 62 61   61 67 65 65   64 70 69 68   67 71 68
DEWPT         34 40 43   46 50 52 55   57 58 58 60   61 62 63 64   63 66 65
PWIND DIR        NE       E     E      SE    SE      SE    SE       S    SW
WIND CHAR        GN      GN    GN      GN    BZ      BZ    BZ      BZ    GN
AVG CLOUDS    FW FW SC   SC SC B1 B1   B1 B1 B1 B1   B1 B2 B2 B1   B1 B1 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.

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  • Page last modified: 26-Jan-2013 1:46 AM UTC