NWS confirms 1.5-inch hail near Alta, Peoria County, IL — Sept 15 evening

A line of severe thunderstorms swept through central Illinois on the evening of September 15, 2026, dropping confirmed 1.50-inch hail near Alta in Peoria County and leaving a trail of downed trees and power lines across the region. The National Weather Service office in Lincoln, Illinois (NWS ILX) logged two storm spotter reports within minutes of each other, placing the storm’s most intense hail impacts in and around Alta, with additional wind damage confirmed in Brimfield later that same evening.

The storms were part of a broader overnight convective complex that produced significant damage well beyond Peoria County, with neighboring Tazewell and Woodford counties also sustaining impacts from the same system. Residents in Alta, Brimfield, and the greater Peoria area who were in the storm’s path should take time in the coming days to inspect their properties carefully — hail damage to roofing materials and siding is often not visible from the street, and water intrusion can develop quickly once a roof’s protective layer has been compromised.

What the National Weather Service Confirmed

NWS Lincoln, IL (NWS ILX) documented the following confirmed storm reports from the evening of September 15, 2026:

• 1.50-inch hail near Alta, Peoria County, IL — Two storm spotter reports confirmed golf-ball-adjacent hail at approximately 9:15 PM CDT and again at 9:22 PM CDT. At 1.50 inches in diameter, hail of this size is large enough to cause measurable damage to asphalt shingles, siding panels, gutters, skylights, and exposed HVAC equipment.
• Trees and power lines down in Brimfield, Peoria County — NWS ILX confirmed wind-related damage in Brimfield later the same evening, consistent with the same storm system tracking through the county.
• Downed power lines and a damaged grain bin in Tazewell County — The same convective complex produced structural and infrastructure damage in the adjacent county to the south.
• Widespread downed trees and power lines in Woodford County — To the northeast, Woodford County sustained widespread wind-related damage, indicating the system’s significant geographic reach across central Illinois.
• No injuries reported — NWS storm data from this event recorded no injuries or fatalities.

At 1.50 inches in diameter, hail falls into the range that roofing professionals and insurance adjusters treat with heightened scrutiny. Asphalt shingles can sustain impact bruising, granule displacement, or cracking that accelerates aging and compromises waterproofing integrity — damage that may not be visible from the ground but becomes apparent on close inspection. Vinyl and aluminum siding panels are also vulnerable at this hail size, and older materials are at greater risk of cracking or denting upon impact.

For official storm data and reports from this event, visit weather.gov.

What Homeowners in Alta, Brimfield, and Peoria Should Check Now

If your property is in Alta, Brimfield, or the broader Peoria area, a thorough post-storm inspection is worth completing within the next several days — while the damage is fresh and before additional weather events complicate the picture. Here is what to look at, zone by zone:

Roof — From the Ground First

• Walk the full perimeter of your home and look for granule loss. Displaced shingle granules often collect in gutters or pile up at the base of downspouts after a significant hail event.
• Look for visibly cracked, split, lifted, or missing shingles.
• Check metal components — flashing around chimneys, pipe boots, ridge vents, and skylights — for dents or separation from the roof surface.
• If you have a metal roof or standing-seam panels, inspect for dimpling or dings that indicate impact points.
• Do not climb on your roof without proper safety equipment and training. A licensed contractor can perform a thorough on-site inspection safely.

Siding and Exterior Walls

• Walk all four sides of the home and look for dents, cracks, holes, or displaced panels in vinyl, aluminum, or wood siding.
• Pay close attention to the windward-facing sides of the structure — typically the south and west exposures, depending on the storm’s track.
• Check window trim, shutters, fascia boards, and soffit panels for impact marks or separation.

Gutters and Downspouts

• Gutters are one of the most reliable on-the-ground indicators of hail impact. Look along the top edge of gutters for denting or deformation.
• Check downspout connections and splash blocks for displacement or damage.
• Clear any debris that accumulated during the storm and verify water flows freely through the system.

Trees and Landscaping

• NWS ILX confirmed downed trees in Brimfield. If you have mature trees on or near your property, inspect for broken limbs, uprooted sections, or trunks leaning toward structures.
• If a tree or large limb came down, inspect the area where it landed for any contact with the roof, siding, fence, or utility connections.
• Unstable hanging limbs — sometimes called “widow makers” — should be addressed promptly by a qualified tree service before the next wind event.

Interior — Water Intrusion

• Check your attic if it is safely accessible. Look for wet insulation, water staining on sheathing or rafters, or any active dripping.
• Inspect ceilings on the top floor of your home for discoloration, bubbling paint, or soft spots — early indicators of water entry.
• Even small hail impacts on aging roofing systems can open pathways for moisture. Overnight convective storms are frequently followed by additional rain, which can quickly exploit new damage.

If You Find Damage

If your inspection turns up signs of hail or wind damage, the steps you take in the days immediately following the storm can meaningfully affect the outcome of an insurance claim and the speed of your repair. Here is what matters most:

Document everything before you touch it. Use your smartphone to photograph and video the damage from multiple angles — close-ups and wider establishing shots of each affected area. Capture a screenshot or printout of the NWS storm report from weather.gov alongside your property documentation to help establish the timing and geographic connection to the confirmed event. Back all photos and videos up to cloud storage immediately.

Take reasonable steps to prevent further damage — safely. If there is an active leak or an exposed opening, you may place a bucket, apply a tarp from the ground, or take other minimal protective measures. Document what you did and why. Do not make permanent repairs until your insurance adjuster has had the opportunity to inspect the damage.

Contact your homeowner’s insurance carrier promptly. Most policies require timely notification of damage. Have your policy number, documentation, and contact information ready when you call. Ask specifically about the inspection and claims process for storm-related damage.

Get an inspection from a licensed restoration contractor. A licensed contractor can provide a detailed written damage assessment and repair estimate — documentation that substantiates your claim and gives the adjuster a clear picture of the scope of work required. Allied Emergency Services has been serving Illinois homeowners since 2015, with more than a decade of storm restoration experience across the greater Midwest. Allied is an Illinois-licensed roofing contractor and IICRC-certified restoration firm. Allied can inspect your property, provide a written estimate, and meet with your insurance adjuster on-site during the claims process to walk through the scope of damage together.

Understand what a restoration contractor can and cannot do. Allied Emergency Services is a licensed restoration contractor — not a public adjuster. Allied does not negotiate, settle, or adjust insurance claims on your behalf. What Allied does: document damage thoroughly, provide accurate and detailed repair estimates, coordinate on-site with your adjuster, and perform the covered restoration work so your home is returned to its pre-storm condition. If you have specific questions about your policy’s coverage terms or claim settlement, direct those to your insurance carrier or a licensed public adjuster.

Homeowners in Peoria and the surrounding area can learn more about Allied’s local response capabilities at Allied’s Peoria storm damage page. For general preparedness guidance following a severe weather event, ready.gov offers additional resources for households at any stage of recovery.

This article is provided as general information only and does not constitute legal or insurance advice. For guidance specific to your policy, coverage, or claim, consult your insurance carrier or a licensed professional.

Contact Allied Emergency Services — 24/7

Storm damage doesn’t wait for business hours, and neither do we. If you suspect hail or wind damage to your home or business in Alta, Brimfield, Peoria, or anywhere in the surrounding area, reach out to Allied Emergency Services now. Our team is licensed, experienced, and ready to respond.

• 📞 Call us 24/7: (800) 792-0212
• 📱 Text ESTIMATE to (844) 907-2546