Missouri and Illinois have experienced some of the most destructive storms in the Midwest. While these events are often remembered for tornado paths, hail size, or rainfall totals, they also tell another story — one about roofs.
From wind uplift and hail impact to long-term water intrusion, major storms across both states have repeatedly exposed how commercial roofing systems respond under extreme conditions. Looking back at these events helps building owners understand where failures happen — and how recovery starts.
2011 Joplin Tornado (Missouri): Wind Uplift at Its Worst
The Joplin tornado remains one of the most destructive tornadoes in U.S. history. While the human impact was devastating, the storm also demonstrated what extreme wind forces can do to commercial roofs.
From a roofing standpoint, this event highlighted:
Complete roof system uplift on large buildings
Failure at roof edges and parapets
Deck separation when attachment systems were overwhelmed
In many cases, buildings that survived structurally still suffered total roof loss, leaving interiors exposed to rain and debris long after the storm passed.
2020 Midwest Derecho: Widespread Wind Damage Without Tornadoes
The 2020 derecho that swept across Missouri and Illinois surprised many building owners because it didn’t involve tornadoes — yet the damage was extensive.
Straight-line winds caused:
Membrane blow-offs on low-slope roofs
Lifted edge metal and flashing
Rain intrusion through stressed seams and penetrations
This storm reinforced an important lesson: wind damage doesn’t require a tornado — and commercial roofs are especially vulnerable to prolonged high-wind events.
Record Hailstorms Across Illinois: Impact Damage That Lingers
Illinois has experienced multiple record-setting hailstorms over the past decade, some producing hailstones exceeding several inches in diameter.
From a roofing perspective, these storms often result in:
Widespread membrane bruising
Insulation compression beneath intact surfaces
Damage that doesn’t leak immediately but shortens roof lifespan
Because hail damage can be subtle, many roofs impacted by these storms continued to perform — until months or years later, when failures began to appear.
Historic Flooding Events: When Water Finds Every Weak Point
Severe rainfall and flooding events across Missouri and Illinois have stressed commercial roofing systems in different ways than wind or hail.
Heavy rain exposes:
Inadequate drainage design
Clogged or undersized roof drains
Areas of ponding water that accelerate membrane breakdown
Even roofs without visible storm damage can suffer long-term degradation when standing water becomes routine after major rainfall events.
What These Storms Reveal About Roof Failure
Across different storm types and decades, the same roofing vulnerabilities appear again and again:
1. Roof Edges Fail First
Edges, corners, and transitions are the most common failure points during high winds.
2. Hidden Damage Is the Most Dangerous
Hail and water intrusion often compromise systems beneath the surface long before leaks appear.
3. Repeated Storm Exposure Adds Up
Many roof failures aren’t caused by one storm — but by years of cumulative weather stress.
Recovery Starts With the Right Evaluation
After major storms, the difference between a manageable repair and a full replacement often comes down to timing and documentation.
Professional post-storm inspections help:
Identify damage that isn’t visible from the ground
Assess insulation and membrane condition
Create a clear plan for repair, restoration, or replacement
For commercial properties in storm-prone regions, inspections aren’t just reactive — they’re preventative.
The Bottom Line: Storms Make Headlines — Roofs Tell the Real Story
Missouri and Illinois storms are remembered for their intensity, but their lasting impact is often measured in roof damage, downtime, and recovery costs.
Understanding how major storms affect commercial roofing systems helps building owners make smarter decisions before the next storm hits — and respond faster when it does.
Jewett Roofing works with commercial property owners across Missouri and Illinois to assess storm damage, guide recovery, and build roofing systems designed for Midwest conditions — season after season.
