Spring in Boulder is a time of blooming wildflowers, longer hikes, and bike rides under clear blue skies—but it also marks the start of hail season. Between April and September, Boulder residents know to keep an eye on the sky, as severe thunderstorms can roll through quickly, dropping ice from above with little warning.

When is Hail Season in Boulder?

Colorado’s hail season typically runs from mid-April through mid-September, peaking in June and July. Boulder, located along the Front Range of the Rockies, lies within the infamous “Hail Alley,” one of the most hail-prone regions in North America.

The combination of warm, moist air from the Gulf of Mexico and cold, dry air descending from the mountains creates the perfect environment for strong thunderstorms—and large hail.

Why Boulder Gets So Much Hail

Boulder’s elevation and unique location on the edge of the Rockies make it a hotspot for volatile weather. As air masses collide and storms build along the foothills, hail becomes a common companion to lightning and high winds.

The updrafts in these storms lift raindrops high into freezing air layers, where they freeze, fall, and refreeze, growing layer by layer. Eventually, gravity wins, and those icy balls plummet to the ground—sometimes with destructive force.

How to Protect Yourself and Your Property

Being prepared can help minimize damage and stress during hail season. Here’s how Boulder residents can get ahead of the storm:

1. Inspect Your Roof

Start with a seasonal checkup. Replace any damaged shingles, and if you’re considering a new roof, look into hail-resistant materials. Roofs in Boulder often take the brunt of hailstorms, and the right preparation can save thousands in repairs.

2. Protect Windows and Skylights

Close blinds and curtains during a storm to help contain shattered glass. If you’re planning home upgrades, consider installing impact-resistant glass or window films that reduce breakage.

3. Clear Gutters and Drains

Backed-up gutters can lead to roof leaks and foundation damage when heavy rain or hail hits. Keeping them clear ensures proper drainage and lessens the chance of water buildup.

4. Trim Trees and Secure the Yard

Remove weak branches that could snap and damage your home. Tie down or store outdoor furniture and equipment, which could become projectiles during high winds.

What to Do During a Hailstorm

When the storm hits, quick thinking and the right precautions can keep you safe:

• Take Shelter Immediately: Head indoors or to the nearest sturdy shelter. Don’t wait for the hail to start falling.

• Avoid Windows: Stay away from windows, glass doors, and skylights. Hail can crack or shatter glass unexpectedly.

• Stay Informed: Use a weather app or radio to monitor Boulder’s alerts and warnings in real time.

• Have an Emergency Plan: Discuss where to go and what to do with your household before a storm arrives.

After the Storm: Recovery Tips

Once it’s safe to go outside, do a quick inspection of your home:

• Check the Roof and Siding: Look for dents, missing shingles, or signs of leaks.

• Walk the Property: Assess damage to windows, fencing, and landscaping.

• Document Everything: Take photos of all damage for insurance claims and keep detailed notes.

• Report to Insurance: Contact your provider as soon as possible to start the claims process.

Final Thoughts

Hail season is just a part of life in Boulder—but with preparation, it doesn’t have to be a nightmare. From regular roof maintenance to knowing how to stay safe during a storm, taking proactive steps now can save you money, stress, and even injury.

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