Hail Damage in Jefferson County, MO

Jefferson County, MO has recorded 16626 hail events within a 30-mile radius of the county center since 2015, based on NOAA NEXRAD radar data. With over 16626 events in a decade, Jefferson County is considered a high-risk hail area.

The largest hail event recorded near Jefferson County reached 4 inches. The average hail size across all events is 1.08 inches. Hail above 1 inch can crack shingles, and hail above 1.75 inches can cause severe structural damage requiring full roof replacement.

Hail season in Missouri typically runs April through July. During these months, atmospheric conditions create powerful thunderstorms capable of producing large hail. Jefferson County residents should inspect their roofs after any storm and consider a professional inspection each spring.

Yes, standard homeowner's insurance policies in Missouri typically cover hail damage as part of the "wind and hail" peril. Most policies require you to file a claim within 1–2 years of the storm date. It's important to document damage promptly — even if damage isn't visually obvious from the ground, a licensed roofer can identify hail impacts during a free inspection.

Hail damage repair costs in Jefferson County typically range from $8,000–$25,000+ for full roof replacement. The final cost depends on roof size, pitch, material type, and the extent of damage. In most cases, if hail damage is confirmed, your homeowner's insurance will cover the cost minus your deductible.

A HailScore is a 0–100 risk index that measures historical hail activity near a specific property. The score is calculated from five factors derived from NOAA NEXRAD radar data: storm frequency, recency, hail size, cumulative damage, and proximity. A score of 0–30 is low risk, 31–60 is moderate, 61–80 is significant, and 81–100 indicates a high-impact hail history.