Regional climate

Midwest region temperatures fluxuate with the seasons. It’s generally cold in winter, hot in summer, and temperate but rainy in spring and fall. Climate reports for the Chicagoland area are available online through the National Oceanic and Atmospheric Administration.

Severe weather

A substantial part of the region’s rainfall comes in the form of thunderstorms with frequent gusts of wind, especially in the spring and summer months. If severe weather conditions occur, radio and TV stations will give detailed information about which areas will be effected. You should keep yourself informed and have a battery-powered radio ready in case of a power outage. If conditions become life-threatening due to a tornado in the area, warning sirens will be activated. The sirens are tested every first Tuesday of the month at 10:00 a.m.

If tornado sirens are activated, seek shelter immediately. Argonne has designated shelter areas. Familiarize yourself with the emergency shelter locations in your work area. When you are off site and shelter areas are not specifically designated, seek shelter inside the basement of a building or a room on the lowest floor in an interior room without any windows.