Daily visual surf observations on Oahu, Hawaii, USA of the Goddard-Caldwell collection starting 1968 (NCEI Accession 0001754)
Surf reports are typically made several times per day at select locations around Oahu, primarily by Honolulu City and County lifeguards and the Surf News Network, Inc. Wave heights are reported in Hawaii scale, Hs, which systematically underestimates breaker size by as much as one-half. Although exactly when and why this tendency originated is highly disputed, it became the primary means of communicating surf size by the late 1960s. From publicly available surf reports and other notes from reputable surfers, Mr. Larry Goddard logged heights from 1968 through September 1987 and Mr. Patrick Caldwell has done similarly from September 1987 to 2020. The caretakers of the dataset typically cross-check observations among the various reporters for quality control. The daily value in the GC set represents the upper end of the reported height range, which is roughly equivalent to H1/10, for the observing time and location with the highest breakers along a given coast facing a similar direction. For the north shore, most observations are taken at Sunset Point, which is usually one of the areas of highest surf under the dominant northwest swells. For days of extreme surf with heights greater than 15 Hs, visual observations are reported from Waimea Bay, where breakers are closer to shore. For the south shores, Ala Moana is usually the reporting site. Observations from the west and east side of Oahu have also been recorded although these reports are of lower quality. Comparisons of the Goddard-Caldwell collection to 1981-2002 data from NOAA buoy 51001, which is located roughly 400 km west-northwest of Oahu, show the north shore surf observations are temporally consistent with the shoaling-only, buoy-estimated breaker heights and have an uncertainty of 10 to 15% of the surf height. Files are in ASCII text by year.
- Cite as: Caldwell, Patrick; US National Oceanographic Data Center (2011). Daily visual surf observations on Oahu, Hawaii, USA of the Goddard-Caldwell collection starting 1968 (NCEI Accession 0001754). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0001754. Accessed [date].
|Ordering Instructions||Contact NCEI for other distribution options and instructions.|
|Distributor||NOAA National Centers for Environmental Information
|Dataset Point of Contact||NOAA National Centers for Environmental Information
|Time Period||1968-08-01 to 2020-12-10|
|Spatial Bounding Box Coordinates||
|Spatial Coverage Map|
|Data Presentation Form|| Digital table - digital representation of facts or figures systematically displayed, especially in columns
|Dataset Progress Status||Complete - production of the data has been completed
Historical archive - data has been stored in an offline storage facility
|Data Update Frequency||As needed|
In this accession, NCEI has archived multiple versions of these data. The latest (and best) version of these data has the largest version number.
|Purpose||This dataset is available to the public for a wide variety of uses including scientific research and analysis.|
|Theme keywords||NODC DATA TYPES THESAURUS
NODC OBSERVATION TYPES THESAURUS
|Data Center keywords||Global Change Master Directory (GCMD) Data Center Keywords
|Platform keywords||NODC PLATFORM NAMES THESAURUS Global Change Master Directory (GCMD) Platform Keywords|
|Instrument keywords||NODC INSTRUMENT TYPES THESAURUS Global Change Master Directory (GCMD) Instrument Keywords|
|Place keywords||NODC SEA AREA NAMES THESAURUS Global Change Master Directory (GCMD) Location Keywords|
|Keywords||NCEI ACCESSION NUMBER|
Last Modified: 2021-03-01T22:08:02Z
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