Iowa · May 15, 2026

Iowa hail map — May 15, 2026

NOAA radar detected hail of an inch or more over 1 Iowa city on May 15, 2026. The largest stones — 1.00″, quarter size — fell over Mason City.

Hail swath map for Mason City, IA on May 15, 2026 showing 1.00 inch hail.
Swath over Mason City on May 15, 2026 — 1.00″ hail. Each city below has its own map for this storm.
Cities hit
1
in Iowa
Largest stone
1.00″
quarter size
Impact rating
3/10
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 15, 2026

Mason City, IA1.00″ · quarter

What people on the ground measured in Iowa on May 15, 2026

12 reports filed with the National Weather Service — 4 from trained spotters or officials. These are measured stones, not radar estimates, so they are the closest thing to proof that hail actually reached the ground.

  • 2.50″ hen egg size Public
    Kanawha, IA7:22 PM CDTHancock County

    Hail ranged from 2.25 to 2.5. Time estimated by radar.

  • 2.50″ hen egg size Public
    Goodell, IA7:45 PM CDTHancock County

    Time estimated by radar.

  • 2.00″ hen egg size Public
    Anthon, IA6:22 PM CDTWoodbury County

    2 inch hail was reported via social media along with damage to lights fixtures and trees.

  • 2.00″ hen egg size Public
    Kanawha, IA7:25 PM CDTHancock County

    Windows broken on car. Time estimated by radar.

  • 2.00″ hen egg size Public
    3 S Woden, IA7:34 PM CDTHancock County

    Report from mPING.

  • 2.00″ hen egg size Trained Spotter
    2 WNW Meservey, IA8:05 PM CDTHancock County

    Corrects previous hail report from 2 WNW Meservey. Updated to included windows on house broken.

  • 1.75″ golf ball size Emergency Mngr
    Ringsted, IA6:03 PM CDTEmmet County
  • 1.75″ golf ball size Law Enforcement
    Bancroft, IA6:24 PM CDTKossuth County
  • 1.75″ golf ball size Public
    4 NW Thornton, IA8:39 PM CDTCerro Gordo County
  • 1.50″ half dollar size Trained Spotter
    5 SSE Holstein, IA7:57 PM CDTIda County

    Spotter reported ping pong ball size hail.

  • 1.50″ half dollar size Trained Spotter
    2 WNW Meservey, IA8:05 PM CDTHancock County
  • 1.50″ half dollar size Public
    Garner, IA8:18 PM CDTHancock County

    Report from mPING: Ping Pong Ball (1.50 in.).

Showing the 12 largest of 42 hail reports filed that day.

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 15, 2026

Nebraska1 city · 1.00″
The full US hail map for May 15, 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 15, 2026

NOAA radar put hail of an inch or more over 1 Iowa city that day. The largest stones — 1.00 inches, quarter size — were over Mason City. Every city hit is listed above with its own stone size.

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