Advanced NEXRAD Radar Data Access and Utilization Overview

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The Next Generation Weather Radar NEXRAD is an extensive network comprising 160 S-band Doppler weather radar stations jointly managed by the National Weather Service, Federal Aviation Administration, and the U.S. r Force. This sophisticated system enables real-time detection of precipitation and wind patterns and allows for mapping their movements through processed data.

National Centers for Environmental Information NCEI offers access to archived NEXRAD Level-II data alongside its associated Level-III products at no cost. For physical copies like hard copies, there's a fee and certification process; see the Data Certification section for detls on ordering and pricing.

Users can conveniently access this data through various services:

1. NEXRAD Inventory: A comprehensive search platform that combines different data access tools with statistics and documentation.

2. Launch Inventory: Access NCEI data via a user-frily interface, searchable by county, city, or zip code.

3. Climate Data Online CDO: Use CDO for pinpointing radar information based on geographic locations including time frames, stations, and altitude ranges.

4. Interactive Radar Map Tool: A visual representation of supplementary information for NCEI's Weather Radar Archive, offering advanced search capabilities across time, station sites, and altitudes.

5. NOAA Open Data Dissemination NODD: The archive inventory is released as part of NODD efforts to promote open data access.

For further assistance:

• Weather and Climate Toolkit: A web service providing data access and visualization services for weather and climate datasets.

• NCEI Online Store: Offers various products such as documentation, hard copies, and more for purchase.

The dataset includes:

1. Level-I L1 Data: Raw radar event data collected by the National Weather Service Radar Operations Center for research purposes on NEXRAD sites. This is avlable in a compressed Time Series Archive format with a 20 TB total volume from 2008 onwards and additional planned years. The data files are aggregated hourly, comprising approximately 1 to 33 case studies per year.

2. NEXRAD Level-II Data: Raw radar base quantities like reflectivity, mean radial velocity, spectrum width, along with dual-polarization data differential reflectivity, correlation coefficient, and differential phase. These are typically stored in files contning a header record followed by multiple 24-byte andor 2,432-byte records.

3. NEXRAD Level-III Products: Over 75 products avlable digitally or as printouts, including state, county, and city background maps.

We have recently reprocessed missing data related to Hurricane Ian for improved accuracy in the archive as of August 21st, 2024. Check our s section for detls on these adjustments.

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