Hail map for Sioux City, IA — May 17, 2026
NOAA radar detected hail up to 1.50″ — half dollar size — within 5 miles of Sioux City on May 17, 2026.
- Max hail size
- 1.50″
- half dollar
- Impact rating
- 5/10
- from stone size
- Size bands over the city
- 2
- distinct radar bands
- Reached the ground
- 70%
- NOAA POSH probability
NOAA's Probability of Severe Hail peaked at 70% over Sioux City that day — high: around even odds of 1″ hail reaching the ground. It is a separate model from the size estimate above: one asks how big the stones were in the storm, the other asks whether they made it down.
Sizes come from NOAA MRMS radar (MESH), which runs about ±0.25″ against ground truth. It is canvass-targeting quality, not claim evidence.
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- The whole state around Sioux City, with this swath already on it
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This page covers Sioux City as a whole. Check your own address to see every storm on record for your roof — the date and the stone size for each one — and we'll email you the full report to keep.
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Sioux City hail on May 17, 2026
NOAA radar estimated stones up to 1.50 inches — half dollar size — within about 5 miles of Sioux City that day, across 2 distinct size bands. Sizes vary street to street inside a single swath.