Derby, KS

Hail map for Derby, KS — April 17, 2026

NOAA radar detected hail up to 1.00″ — quarter size — within 5 miles of Derby on April 17, 2026.

Hail swath map for Derby, KS on April 17, 2026 showing 1.00 inch hail.
Max hail size
1.00″
quarter
Impact rating
3/10
from stone size
Size bands over the city
1
distinct radar bands
Reached the ground
50%
NOAA POSH probability
Measured on the ground
1.75″
1.1 mi away · Public

NOAA's Probability of Severe Hail peaked at 50% over Derby that day — moderate: severe hail likely reached the ground somewhere nearby. 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.

Roofing contractors

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Homeowners

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This page covers Derby 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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Other towns hit on April 17, 2026

Ponca City, OK2.00″Janesville, WI1.50″Enid, OK1.50″Beloit, WI1.50″Freeport, IL1.50″Wichita, KS1.00″Saint Joseph, MO1.00″Chesterfield, MO1.00″Wildwood, MO1.00″Wentzville, MO1.00″Marshalltown, IA1.00″Faribault, MN1.00″
Every Kansas city hit on April 17, 2026 →

Other hail dates for Derby

August 7, 20261.50″April 3, 20261.00″September 3, 20251.50″August 19, 20251.00″July 6, 20251.00″June 29, 20251.50″June 17, 20251.50″April 2, 20251.00″August 23, 20241.00″June 4, 20241.50″May 15, 20241.00″April 30, 20241.00″
Every storm over Derby →

What people on the ground measured in Derby, KS on April 17, 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.

  • 1.75″ golf ball size Public
    Derby, KS · 1.1 mi away3:41 PM CDTSedgwick County

    Golf ball sized hail sent via mPING.

  • 1.00″ quarter size Fire Dept/Rescue
    Derby, KS · 0.6 mi away3:38 PM CDTSedgwick County
  • 1.00″ quarter size Public
    3 S Haysville, KS · 4.8 mi away3:33 PM CDTSedgwick County
  • 1.00″ quarter size Public
    2 WNW Rose Hill, KS · 5.9 mi away3:54 PM CDTSedgwick County
  • 1.00″ quarter size Official NWS Obs
    Wichita Eisenhower Airp, KS · 11.8 mi away2:36 PM CDTSedgwick County

    Mostly pea to penny sized hail with a couple of quarter sized pieces.

  • 0.88″ penny size Fire Dept/Rescue
    1 SSE Clearwater, KS · 13.1 mi away3:21 PM CDTSedgwick County
  • 0.88″ penny size Fire Dept/Rescue
    Douglass, KS · 14.3 mi away4:07 PM CDTButler County

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

Derby hail on April 17, 2026

NOAA radar estimated stones up to 1.00 inches — quarter size — within about 5 miles of Derby that day, across 1 distinct size band. Sizes vary street to street inside a single swath.

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