Hail on May 20, 2024: where it hit
The archived NWS Local Storm Reports for May 20, 2024 hold 165 hail reports across 11 states. The largest reported size, 4.00 inches, was logged 2 times (Washington County, Colorado; Yuma County, Colorado). Nebraska logged the most reports (51). Report sizes are as people reported them.
A storm day runs 7 a.m. to 7 a.m. Central (12:00 to 12:00 UTC), as the Storm Prediction Center counts it, so an evening storm stays on the day it fell.
Radar swath archive begins after this date. The dated reports on this page are the record for this day.
Largest reported stones on May 20, 2024
The 5 largest of 165 reports with a measured size. 2 reports share the top size of 4.00 inches. Report times are not kept in the archived file, so none are shown.
| Size | County | State | Lat, Lon |
|---|---|---|---|
| 4.00″ | Washington County | Colorado | 40.11, -103.21 |
| 4.00″ | Yuma County | Colorado | 40.11, -102.72 |
| 3.00″ | Washington County | Colorado | 40.05, -103.28 |
| 3.00″ | Clay County | Iowa | 43.06, -95.34 |
| 2.75″ | Yuma County | Colorado | 40.12, -102.72 |
Counties with the most hail reports
Top 10 of 52 counties with at least one report; ties are listed by state, then name. 1 report could not be placed in a county and is left out of this table.
| County | State | Reports | Largest |
|---|---|---|---|
| Yuma County | Colorado | 21 | 4.00″ |
| Washington County | Colorado | 15 | 4.00″ |
| Douglas County | Nebraska | 13 | 1.75″ |
| Hall County | Nebraska | 13 | 2.00″ |
| Morgan County | Colorado | 8 | 2.50″ |
| Clay County | Iowa | 6 | 3.00″ |
| O'Brien County | Iowa | 5 | 1.75″ |
| Saunders County | Nebraska | 4 | 1.75″ |
| El Paso County | Colorado | 3 | 1.50″ |
| Jefferson County | Colorado | 3 | 0.75″ |
States with the most hail reports
Top 10 of 11 states.
- Nebraska: 51 reports
- Colorado: 50 reports
- Iowa: 28 reports
- Minnesota: 11 reports
- Illinois: 8 reports
- Indiana: 5 reports
- Wisconsin: 4 reports
- Michigan: 3 reports
- Florida: 2 reports
- South Dakota: 2 reports
Check any address against this storm on the hail map →
Questions about the May 20, 2024 hail
How big was the hail on May 20, 2024?
The largest reported stone on May 20, 2024 was 4.00 inches, among 165 reports nationwide.
Where did it hail on May 20, 2024?
Reports by state: Nebraska (51), Colorado (50), Iowa (28), Minnesota (11), Illinois (8) and 6 more. Counties with the most reports: Yuma County, CO (21), Washington County, CO (15), Douglas County, NE (13).
Did the May 20, 2024 hail hit my address?
Use the hail map's address search: it lists every dated report within 10 miles of any US address (5 or 25 if you pick) and, for days in the radar archive, tests your exact point against the estimated swath, then prints a sourced report you can keep.
How these figures are built
Reports are NWS Local Storm Reports of hail, pulled from the Iowa Environmental Mesonet archive. This page reads data/hail/events-2024.json (pulled 2026-10-17). Local Storm Reports are preliminary and unverified: sizes are what spotters, the public and emergency managers reported, and NOAA NCEI's Storm Data, published months later, is the verified record. A report with no size counts toward the total but not toward the size figures. Severe size means 1 inch or larger, the National Weather Service threshold. Crops can be hurt by smaller hail, especially with wind, and the loss depends on growth stage: the corn growing point stays below ground until about V6, and leaf loss near tasseling costs the most yield. State is the state named on the report. County is not carried in the archived file; it is assigned here by placing each report's coordinates (rounded to about 1 km) inside US Census cartographic county boundaries, so a report near a county line can land in the neighboring county.
Method: one day of hail reports, counted and ranked as filed; county placed by coordinates; severe means 1″ or larger (NWS) · Sources: NWS Local Storm Reports via the Iowa Environmental Mesonet, NOAA MRMS MESH, US Census county boundaries, Assessing Hail Damage to Corn (NCH-1) · Reviewed by Sigurd Lindquist, CCA