Accessing Professional Weather Radar Data: A Comprehensive Guide

Professional weather radar data, such as the Next Generation Weather Radar (NEXRAD) system, provides critical information for weather forecasting, storm tracking, and atmospheric research. This guide outlines how to access NEXRAD Level-II and Level-III data through various platforms and tools.

What is NEXRAD Data?

The NEXRAD system comprises a network of 160 high-resolution S-band Doppler weather radars operated by the National Weather Service (NWS), the Federal Aviation Administration (FAA), and the U.S. Air Force. These radars detect precipitation and wind, enabling the mapping of precipitation patterns and movement. NEXRAD data is categorized into Level-II (base data) and Level-III (processed products) formats. (ncei.noaa.gov)

How to Access NEXRAD Data

Accessing NEXRAD data can be achieved through several platforms and tools:

1. NEXRAD Inventory

The NEXRAD Inventory is a comprehensive search and discovery hub for NEXRAD data, offering various data access tools, statistics, and documentation. Users can search for data by site, date, and product type. (ncei.noaa.gov)

2. Climate Data Online (CDO)

CDO provides free access to NCEI's archive of global historical weather and climate data, including NEXRAD data. Users can search for data by county, city, or zip code. (ncei.noaa.gov)

3. Interactive Radar Map

The Interactive Radar Map Tool displays supplemental data in support of NCEI's Weather Radar Archive, including search parameters for time frame, station(s), and altitude. (ncei.noaa.gov)

4. Cloud Access

The NOAA Open Data Dissemination (NODD) program has released both Level-II and Level-III NEXRAD data on multiple cloud storage providers, providing instant download access to all historical and near real-time data. (ncei.noaa.gov)

5. Weather and Climate Toolkit

The NCEI Weather and Climate Toolkit (WCT) offers data access and visualization web services for weather and climate data, including NEXRAD data. (ncei.noaa.gov)

Data Types and Formats

NEXRAD data is available in two primary formats:

• Level-II Data: Contains raw radar event data, including reflectivity, mean radial velocity, and spectrum width. (ncei.noaa.gov)

• Level-III Products: Processed products derived from Level-II data, such as precipitation estimates and storm tracking information. (ncei.noaa.gov)

Data Access and Usage

Access to NEXRAD data is generally free, with fees applicable for custom orders, data certifications, copies of analog materials, and data distribution on physical media. Users can download data directly from the platforms mentioned above. For bulk orders or specific data requests, the NCEI Online Store provides additional options. (ncei.noaa.gov)

Conclusion

Accessing professional weather radar data, such as NEXRAD Level-II and Level-III products, is essential for accurate weather forecasting and atmospheric research. Utilizing the platforms and tools outlined in this guide enables users to effectively obtain and utilize NEXRAD data for various applications.

Highlights:

• Historical Radar Data in Google Cloud | News | National Centers for Environmental Information (NCEI)