Severe Weather Watch in Chicago

The National Weather Service (NWS) issues a Severe Thunderstorm Watch when atmospheric conditions are favorable for developing storms capable of producing hail of one inch in diameter or greater and/or wind speeds of at least 58 mph. This watch covers multiple counties across northeastern Illinois and northwestern Indiana, with the primary threats being damaging winds capable of downing tree limbs and power lines, as well as large hail that can damage property and vehicles. While not the primary threat, isolated tornadoes can also develop under these conditions. The Chicago Office of Emergency Management and Communications (OEMC) works with the NWS office in Romeoville, IL, to monitor the storm system. The OEMC advises residents to secure loose outdoor objects, such as patio furniture and garbage cans, which can become projectiles in high winds. Residents are encouraged to have multiple ways to receive warnings, including weather apps and NOAA Weather Radio. The city utilizes the NotifyChicago alert system for emergency notifications and makes non-emergency service requests available through the 311 system. During a similar severe weather event in April 2023, multiple tornadoes touched down in northern Illinois, accompanied by widespread reports of large hail and wind damage, underscoring the potential severity of such weather systems in the region. City officials recommend creating a household emergency plan, which includes identifying a safe shelter location away from windows, such as a basement or an interior room on the lowest floor. It is also advised to have a charged cell phone and an emergency kit accessible.