Johnston, IA

Hail map for Johnston, IA — September 8, 2026

NOAA radar detected hail up to 2.00″ — hen egg size — within 5 miles of Johnston on September 8, 2026.

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Max hail size
2.00″
hen egg
Impact rating
7/10
from stone size
Size bands over the city
3
distinct radar bands
Measured on the ground
2.25″
6.4 mi away · Broadcast Media

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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Other towns hit on September 8, 2026

Des Moines, IA2.00″Ankeny, IA2.00″West Des Moines, IA1.50″Urbandale, IA1.50″
Every Iowa city hit on September 8, 2026 →

Other hail dates for Johnston

July 27, 20261.00″July 20, 20261.50″July 3, 20261.00″July 2, 20261.00″March 30, 20261.00″July 31, 20242.00″July 15, 20241.50″
Every storm over Johnston →

What people on the ground measured in Johnston, IA on September 8, 2026

7 reports filed with the National Weather Service — 1 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.

  • 2.25″ hen egg size Broadcast Media
    Ankeny, IA · 6.4 mi away5:53 PM CDTPolk County

    Report of 2.25 inch hail relayed from broadcast media via email.

  • 1.75″ golf ball size Public
    1 NW Bondurant, IA · 11.4 mi away6:17 PM CDTPolk County

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

  • 1.50″ half dollar size Trained Spotter
    2 E Ankeny, IA · 8.9 mi away6:08 PM CDTPolk County

    Trained spotter reported largest hail around 1.5 inches and minor siding damage.

  • 1.50″ half dollar size Public
    3 E Ankeny, IA · 8.9 mi away6:09 PM CDTPolk County

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

  • 1.25″ half dollar size Broadcast Media
    4 SE Ankeny, IA · 8.4 mi away6:10 PM CDTPolk County

    Relayed public photo of a hailstone estimated at half dollar sized. Time and location also estimated.

  • 1.25″ half dollar size Public
    1 NW Bondurant, IA · 11.4 mi away6:09 PM CDTPolk County

    Report from mPING: Half Dollar (1.25 in.).

  • 0.88″ penny size Public
    1 NW Altoona, IA · 10.8 mi away6:08 PM CDTPolk County

    Time estimated.

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.

FAQ

Johnston hail on September 8, 2026

NOAA radar estimated stones up to 2.00 inches — hen egg size — within about 5 miles of Johnston that day, across 3 distinct size bands. Sizes vary street to street inside a single swath.

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