Cooperative Observer Program (COOP) Hourly Precipitation Data (HPD), Version 2

COOP-HPD v2

browse graphicNCEI COOP Hourly Precipitation
The Cooperative Observer Program (COOP) Hourly Precipitation Data (HPD) consists of quality controlled precipitation amounts, which are measurements of hourly accumulation of precipitation, including rain and snow for approximately 2,000 observing stations around the country, and several U.S. territories in the Caribbean and Pacific from the National Weather Service (NWS) Fischer-Porter Network. This new version of COOP HPD with faster automations due updated stations will result in faster access for the public. The data are from 1940 to present, depending upon when each station was installed. These stations, nearly all of which were part of HPD version 1, also known as DSI-3240, were gradually upgraded from paper punch tape data recording systems to a more modern electronic data logger system from 2004-2013.

The 15-min gauge depth time series are processed at NCEI via automated quality control and filtering algorithms to identify and remove spurious observations from noise and malfunctioning equipment, and also those due to natural phenomena such as evaporation and the necessary occasional emptying of the gauge. Hourly precipitation totals are then computed from the 15-min data and are quality controlled by a suite of automated algorithms that combine checks on the daily and hourly time scale. Data and metadata are ingested on a daily basis and combined in a single integrated dataset.

As with the legacy punch paper instrumentation, the electronic loggers record rain gauge depth every 15 minutes. Monthly site visits to each station are still performed, but instead of collecting punched paper (that would subsequently need conversion to a digital record via a MITRON reader), data are downloaded from the station's datalogger to a memory stick and centrally collected at the local Weather Forecast Office (WFO) for all stations in the WFO area. The WFO subsequently combines all data into a single tar file and transfers the data to NCEI via ftp upload nominally each month.

This updated HPD includes the historical data from the punch paper era and the recent digital era in order to provide the full period of record for each location. These data are formatted consistent with practices for NCEI Global In-situ datasets.
  • Cite as: Wuertz, David; Lawrimore, Jay; and Korzeniewski, Bryant (2018). Cooperative Observer Program (COOP) Hourly Precipitation Data (HPD), Version 2.0. [indicate subset used]. NOAA National Centers for Environmental Information. doi:10.25921/p7j8-2170 [access date].
Order Data
  • NCEI Customer Support (order)
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Distribution Formats
  • ASCII
Distributor Customer Engagement Branch
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
1-828-271-4800
ncei.orders@noaa.gov
Dataset Point of Contact Customer Engagement Branch
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
1-828-271-4800
ncei.orders@noaa.gov
Time Period 1940 to Present (time interval: 1-hour)
Spatial Bounding Box Coordinates
N: 72.0
S: -15.0
E: -64.0
W: 134.0
Spatial Coverage Map
General Documentation
Processing Documents
Associated Resources
  • NCEI landing page for the superseded Version 1
Publication Dates
  • publication: 2018-05-31
Edition Version 2
Data Presentation Form Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status Ongoing - data is continually being updated
Data Update Frequency Monthly
Purpose This data set provides precipitation amounts on an hourly timescale for stations in the Fischer-Porter network.
Use Limitations
  • The punch paper (legacy) system provided observations to 0.10". The newer network of digital recorders provides data to 0.01". However, it is important to note that the stated accuracy of the gauges remains 0.10". Although hourly totals are provided to hundredths of an inch, users should not that the presence of noise in the record can create spurious light precipitation amounts while also making it difficult to always identifying actual light amounts (<0.05").
Dataset Citation
  • Cite as: Wuertz, David; Lawrimore, Jay; and Korzeniewski, Bryant (2018). Cooperative Observer Program (COOP) Hourly Precipitation Data (HPD), Version 2.0. [indicate subset used]. NOAA National Centers for Environmental Information. doi:10.25921/p7j8-2170 [access date].
Cited Authors
  • Wuertz, David
    DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
  • Lawrimore, Jay
    DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
  • Korzeniewski, Bryant
    DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Originators
  • Wuertz, David
    DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Collaborators
  • Lawrimore, Jay
    DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
  • Korzeniewski, Bryant
    DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Publishers
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Theme keywords Global Change Master Directory (GCMD) Science Keywords
  • Earth Science > Atmosphere > Precipitation
Global Climate Observing System (GCOS) Essential Climate Variables (ECVs)
  • Atmospheric - Surface - Precipitation
Data Center keywords Global Change Master Directory (GCMD) Data Center Keywords
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
  • DOC/NOAA/NWS > National Weather Service, NOAA, U.S. Department of Commerce
Platform keywords Global Change Master Directory (GCMD) Platform Keywords
  • Fixed Observation Stations
Instrument keywords Global Change Master Directory (GCMD) Instrument Keywords
  • Gauges
  • In Situ/Laboratory Instruments
Place keywords Global Change Master Directory (GCMD) Location Keywords
  • Continent > North America > United States Of America
Data Resolution keywords Global Change Master Directory (GCMD) Horizontal Data Resolution Keywords
  • 50 km - < 100 km or approximately .5 degree - < 1 degree
Global Change Master Directory (GCMD) Vertical Data Resolution Keywords
  • < 1 meter
Global Change Master Directory (GCMD) Temporal Data Resolution Keywords
  • 1 minute - < 1 hour
Stratum keywords Global Change Master Directory (GCMD) Location Keywords
  • Vertical Location > Land Surface
Use Constraints
  • Cite as: Wuertz, David; Lawrimore, Jay; and Korzeniewski, Bryant (2018). Cooperative Observer Program (COOP) Hourly Precipitation Data (HPD), Version 2.0. [indicate subset used]. NOAA National Centers for Environmental Information. doi:10.25921/p7j8-2170 [access date].
  • Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
Access Constraints
  • Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
Fees
  • In most cases, electronic downloads of the data are free, however fees may apply for data certifications, copies of analog materials, and data distribution on physical media.
Lineage information for: dataset
Lineage Statement This is a new version that follows the legacy Hourly Precipitation Data (HPD), version 1, (DSI-3240) that has been maintained at NCEI (formerly NCDC) since at least the 1980s. The HPD network has operated since the middle of the 20th century, providing 15-minute precipitation observations and hourly totals for approximately 2000 stations. It originally consisted of several different weighing rain gauge instruments before F&P gauges, with automated readout recorded on paper tape, were phased into the network in the early 1960s. Small changes in the number of stations have occurred throughout the period of record, but the number of stations remains near 2000. Additional information is available in the ATBD (Algorithm Theoretical Basis Document).
Processor
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Processing Steps
  • Data are provided by each of the 122 NWS Weather Forecast Offices. Monthly site visits are made, data are downloaded to thumb drives and then the volunteer either mails the thumb drive or e-mails the data to the WFO. The WFO then consolidates the data and provides to NCEI's anonymous ftp site in a zip file. These data are in the form of gauge depths collected every 15 minutes. The gauge depths are converted to 15-minute totals and those are summed into hourly totals. Quality control is performed and the final hourly data are provided - one Period of Record file per station.
    Rationale: The steps are necessary for assuring the quality of the data.
Processing Environment Information on the data processing environment is available in the ATBD (Algorithm Theoretical Basis Document).
Processing Documents
Source Datasets
  • National Weather Service (NWS) Fischer-Porter Network - Precipitation
    • National Weather Service (NWS) Fischer-Porter Network - Precipitation
      Raw 15 minute precipitation from the National Weather Service (NWS) Fischer-Porter Network stations.
    • Description of Source: Hourly precipitation totals from the National Weather Service (NWS) Fischer-Porter stations that are part of the NWS Cooperative Observers Network.
    • Temporal extent used: 2000-01-01 to 2006-02-28
    • Spatial extent used: N:55 S:22 E:60 W:130
  • National Weather Service (NWS) Fischer-Porter Network - Precipitation
    • National Weather Service (NWS) Fischer-Porter Network - Precipitation
      Raw 15 minute prlsecipitation from the National Weather Service (NWS) Fischer-Porter Network stations.
    • Description of Source: Hourly precipitation totals from the National Weather Service (NWS) Fischer-Porter stations that are part of the NWS Cooperative Observers Network.
    • Temporal extent used: 2006-03-01 to Present
    • Spatial extent used: N:55 S:22 E:60 W:130
Lineage information for: repository
Processing Steps
  • 2015-04-22T00:00:00 - NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
Last Modified: 2018-12-12
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