What Types of Data Does NOAA NCEI Archive?

Updated

NOAA's National Centers for Environmental Information (NCEI) maintains one of the most significant environmental archives on Earth, covering oceanic, atmospheric, and geophysical data. According to NCEI, the center archives over 229 terabytes of data each month from a wide range of observing systems. The archive spans historical weather, climate, ocean, and magnetic field conditions, so it serves both long-term climate research and near-term operational needs.

The Three Core Data Domains

NCEI organizes its holdings around three broad categories, each drawing on different observing systems and serving different user communities.

Atmospheric Data

This covers weather and climate records collected from surface stations, satellites, radar, radiosondes, and aircraft. It includes:

  • Historical weather observations and daily summaries
  • Climate monitoring products, such as global and U.S. temperature and precipitation analyses
  • Long-running climate records used to track trends and anomalies

NCEI's featured news illustrates the scale of this work: its August 2026 global report placed the month 2.38°F (1.32°C) above the 20th-century average, the warmest August in the 1850–2026 record. That kind of statement depends on a continuous, quality-controlled atmospheric archive.

Oceanic Data

NCEI's ocean holdings come from buoys, ships, satellites, and submersible platforms. They support:

  • Sea surface temperature and ocean heat content records
  • Coastal and marine observations
  • Long-term oceanographic monitoring datasets

Geophysical Data

This domain includes solid-Earth and space-weather measurements, notably:

  • Magnetic field conditions and geomagnetic observations
  • Seismic and other geophysical records

The magnetic field data is one reason NCEI's scope extends beyond weather and climate into navigation, infrastructure, and space-weather applications.

How the Archive Is Organized for Access

NCEI does not present its holdings as a single undifferentiated store. The site separates them into functional entry points:

Entry Point What It Provides
Access Data Direct paths into datasets and archives
Archive The long-term preservation collections
Recent Weather Current and recent conditions for a local area
Maps / Monitoring Visual and ongoing monitoring products
Data Certification Officially certified climate records

Weather forecasts are handled separately by the National Weather Service, so NCEI is best understood as the historical and monitoring archive rather than a forecast source.

A Practical Note on Access

NCEI states it is currently moving its data and applications to the cloud, and this upgrade "may result in temporary data access delays." If a dataset does not load as expected, the recommended steps are:

  1. Check the NCEI Alerts page for impacted products and datasets.
  2. Review the cloud migration overview and its FAQ for current status.
  3. Retry access later if the delay is migration-related rather than a broken link.

Who This Archive Is For

The 229-terabyte monthly intake and the breadth of domains make NCEI relevant to several audiences:

  • Researchers needing historical climate, ocean, or geomagnetic series
  • Analysts tracking temperature, precipitation, or ENSO patterns
  • Engineers and planners working with magnetic field or long-term environmental records
  • General users looking up recent weather data for a specific area

If your need is a forecast, go to the National Weather Service. If your need is a record of what already happened—measured, archived, and often certified—NCEI is the appropriate starting point.