Iowa · May 17, 2026

Iowa hail map — May 17, 2026

NOAA radar detected hail of an inch or more over 1 Iowa city on May 17, 2026. The largest stones — 1.50″, half dollar size — fell over Sioux City.

Hail swath map for Sioux City, IA on May 17, 2026 showing 1.50 inch hail.
Swath over Sioux City on May 17, 2026 — 1.50″ hail. Each city below has its own map for this storm.
Cities hit
1
in Iowa
Largest stone
1.50″
half dollar size
Impact rating
5/10
from stone size

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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Iowa cities hit on May 17, 2026

Sioux City, IA1.50″ · half dollar

What people on the ground measured in Iowa on May 17, 2026

6 reports filed with the National Weather Service. These are measured stones, not radar estimates, so they are the closest thing to proof that hail actually reached the ground.

  • 1.75″ golf ball size Public
    3 SW Craig, IA6:43 PM CDTPlymouth County

    Photo via social media. Time estimated via radar.

  • 1.75″ golf ball size Public
    3 S Sanborn, IA8:09 PM CDTO'Brien County

    Report from mPING: Golf Ball (1.75 in.).

  • 1.25″ half dollar size Public
    3 NE Lester, IA5:14 PM CDTLyon County

    Social media report with picture and coin for size comparison. Time estimated by radar.

  • 1.25″ half dollar size Public
    Craig, IA6:50 PM CDTPlymouth County

    Photo via social media. Time estimated by radar.

  • 0.75″ penny size Public
    Rock Valley, IA5:51 PM CDTSioux County

    mPING: Dime (0.75 in.). Time estimated via radar.

  • 0.75″ penny size Public
    Sibley, IA6:36 PM CDTOsceola County

    Report from mPING: Dime (0.75 in.). Time estimated via radar.

Reports come from the National Weather Service Local Storm Report feed, ingested every 15 minutes. A report records where the observer was, not the full extent of the swath — treat it as evidence about the storm, not about any one roof.

Other states hit on May 17, 2026

South Dakota1 city · 1.50″Michigan2 cities · 1.50″Florida1 city · 1.00″Nebraska2 cities · 1.00″
The full US hail map for May 17, 2026 →

Other Iowa hail days

August 12, 20262 cities · 1.00″August 7, 20262 cities · 1.00″July 27, 20263 cities · 1.00″July 21, 20261 city · 1.00″July 20, 20267 cities · 1.50″July 4, 20261 city · 1.00″July 3, 20263 cities · 1.00″July 2, 20267 cities · 1.00″July 1, 20261 city · 1.50″June 30, 20261 city · 1.00″June 28, 20262 cities · 1.00″June 17, 20261 city · 1.00″
Every hail day across Iowa →
FAQ

Iowa hail on May 17, 2026

NOAA radar put hail of an inch or more over 1 Iowa city that day. The largest stones — 1.50 inches, half dollar size — were over Sioux City. Every city hit is listed above with its own stone size.

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