National Weather Service Chicago
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| National Weather Service Chicago | |
|---|---|
| Name | National Weather Service Chicago |
| Headquarters | Chicago, Illinois |
| Formed | 1870s (local precursor), 1993 (modern office consolidation) |
| Jurisdiction | Northeastern Illinois and Northwestern Indiana |
| Parent agency | National Weather Service |
National Weather Service Chicago is the local National Weather Service office responsible for meteorological services across the Chicago metropolitan area, northeastern Illinois, and northwestern Indiana. The office issues forecasts, warnings, observations, and hydrologic guidance for municipalities, counties, airports, waterways, and emergency management partners including the City of Chicago, Cook County, Lake County, and Porter County. It supports aviation operations at O'Hare International Airport, Midway International Airport, Gary/Chicago International Airport, and regional airspace coordination involving the Federal Aviation Administration and the Transportation Security Administration.
History
The lineage of meteorological services in the Chicago region traces to early signal stations and the United States Army Signal Corps in the 19th century, with antecedents tied to the development of the United States Signal Service and the later United States Weather Bureau. During the Progressive Era, the office engaged with the Great Chicago Fire aftermath and urban planning initiatives alongside the Chicago Sanitary and Ship Canal projects. In the 20th century, collaborations occurred with institutions such as the University of Chicago, the Argonne National Laboratory, and the Illinois State Water Survey. The office adapted through events like the Great Lakes Storm of 1913, the Chicago heat wave of 1995, and the 1979 Chicago blizzard, integrating lessons with federal directives from the Office of the Federal Coordinator for Meteorology and the National Oceanic and Atmospheric Administration modernization efforts. The consolidation of forecast offices and the deployment of the NEXRAD radar network, including the local WSR-88D installation, reshaped services during the 1980s and 1990s in concert with the National Weather Service modernization and restructuring.
Organization and Operations
The office operates under the administration of the National Weather Service and coordinates with the NOAA Weather Radio system, regional NOAA laboratories, and the National Centers for Environmental Prediction. Staffing includes meteorologists from the American Meteorological Society-certified ranks, electronics technicians certified by Institute of Electrical and Electronics Engineers, hydrologists affiliated with the American Geophysical Union, and communication specialists liaising with municipal agencies, state emergency management agencies like the Illinois Emergency Management Agency and the Indiana Department of Homeland Security. Operational suites host the Advanced Weather Interactive Processing System and depend on real-time ingest from networks such as the Automated Surface Observing System, AWOS, ASOS, and cooperative observers including National Weather Service Cooperative Observer Program volunteers. The office issues products via the Emergency Alert System and coordinates with regional forecast offices including NWS Milwaukee/Sullivan and NWS Lincoln (IL).
Forecast and Warning Services
Forecast responsibilities encompass short-term, public, marine, and severe-weather products that integrate guidance from the Storm Prediction Center, the Hydrometeorological Prediction Center, and the Climate Prediction Center. Watches and warnings for tornadoes, severe thunderstorms, flash floods, and winter storms reference upstream observations from the Great Lakes Surf Forecasting System and satellite platforms such as GOES-East and Suomi NPP. Performance metrics are assessed relative to national standards set by the Office of Management and Budget and interagency reviews with partners like the Federal Emergency Management Agency. The office also supports hazard-specific coordination during incidents involving agencies such as the Chicago Fire Department, the Cook County Office of Homeland Security and Emergency Management, and the United States Coast Guard on Lake Michigan.
Hydrology and River Forecasting
River and hydrologic forecasting involves collaboration with the United States Geological Survey streamgage network, the Chicago Metropolitan Water Reclamation District of Greater Chicago, and the Great Lakes Observing System. Flood forecasts account for basin behavior in systems such as the Des Plaines River, the Kankakee River, and the Chicago River, integrating precipitation estimates from Doppler radar, gauge networks, and models like the Hydrologic Engineering Center River Analysis System. The office issues river stage forecasts used by entities including the Metropolitan Water Reclamation District of Greater Chicago and navigation stakeholders such as the American Great Lakes Ports Association and the Inland Waterways Users Board.
Climate and Research Programs
Climate services draw upon records from local cooperative stations, municipal climatology archives maintained by the Chicago Office of Emergency Management and Communications, and research partnerships with universities such as Northwestern University, University of Illinois Urbana-Champaign, and DePaul University. Programs integrate paleoclimate context from the Illinois State Museum and applied research with the Cooperative Institute for Meteorological Satellite Studies. Projects have examined urban heat island effects relevant to the Chicago Climate Action Plan, lake-effect processes on Lake Michigan, and long-term trends considered by the Intergovernmental Panel on Climate Change assessments. The office contributes to the National Weather Service Climate Services and provides data supporting initiatives by the Regional Greenhouse Gas Initiative-adjacent stakeholders.
Outreach, Aviation, and Emergency Coordination
Outreach includes educational engagements with institutions like the Field Museum, Museum of Science and Industry (Chicago), and public schools across Chicago Public Schools, alongside volunteer recruitment from organizations such as American Red Cross and the Boy Scouts of America. Aviation weather services liaise directly with Chicago Department of Aviation, air traffic control centers like Chicago Air Route Traffic Control Center, and airline operations at hubs including United Airlines and American Airlines. Emergency coordination protocols are exercised with agencies including the Department of Homeland Security, the Centers for Disease Control and Prevention during public-health incidents, and local emergency operations centers such as those in Cook County and Lake County, Illinois. Community alerting leverages partnerships with media outlets like WGN-TV, WBBM-TV, Chicago Tribune, and regional radio broadcasters to disseminate warnings and preparedness guidance.