Weather
Illinois Winter Weather Awareness Week Oct 25-31: Blizzard Dangers Explained
Chicago, IL – Winter Weather Awareness Week begins Sunday, October 25, with an important question for Illinois residents: What actually makes a winter storm a blizzard? The answer may surprise you, es
By Cole Barrett · 2026-10-25T17:35:07.296Z
Chicago, IL – Winter Weather Awareness Week begins Sunday, October 25, with an important question for Illinois residents: What actually makes a winter storm a blizzard? The answer may surprise you, especially because heavy snowfall isn't always required.
According to the National Weather Service NWS , a blizzard occurs when sustained winds or frequent gusts reach at least 35 mph, accompanied by falling or blowing snow that reduces visibility to one quarter mile or less for at least three hours.
Even snow already on the ground can produce blizzard conditions when powerful winds lift it into the air, creating dangerous whiteouts.
What's the Difference Between a Watch and a Warning? A Winter Storm Watch means significant winter weather is possible, giving residents time to prepare.
A Winter Storm Warning means dangerous winter conditions are expected or already occurring.
A Blizzard Warning is issued when blizzard conditions are expected or underway. Travel can quickly become dangerous as blowing snow reduces visibility and roads become difficult to navigate.
What Should Illinois Residents Have Ready? Before winter storms arrive, households should prepare emergency supplies, including:
Food and water: At least three days of nonperishable food and one gallon of water per person daily. Warmth: Extra blankets, sleeping bags, winter clothing and safe backup heating options. Emergency supplies: Flashlights, batteries, medications, first aid kits and charged power banks. Vehicles: A full tank of gas, blankets, jumper cables, an ice scraper, a small shovel and emergency supplies. Snow removal: Shovels, ice melt, rock salt and traction materials. Never operate generators, outdoor grills or other fuel burning outdoor equipment indoors or inside garages because of deadly carbon monoxide risks.
Why It Matters Across Illinois From Chicago and Cook County to Rockford, Peoria, Bloomington, Springfield and communities throughout southern Illinois, winter storms can create dangerous conditions statewide.
Lake effect snow near Lake Michigan, strong winds across central Illinois farmland and blowing snow can disrupt travel along Interstate 90, Interstate 80, Interstate 55, Interstate 57 and Interstate 74.
Rural highways across central and northern Illinois can become especially dangerous when powerful winds create drifting snow and sudden whiteouts, even after snowfall has stopped.
Power outages, blocked roads and extreme cold can also delay emergency assistance.
As Winter Weather Awareness Week continues through Saturday, October 31, residents are encouraged to review emergency plans, check supplies and monitor official NWS forecasts.
Remember: A blizzard is defined by wind, visibility and duration — not snowfall totals.