Reported by SPC 170 days ago.
No stronger detection stands among the 135 recorded within 20 km of this point since 11 March 2026 — 89 others scored the same. Another comparable one was recorded here earlier the same day. 38 more were recorded here in the fortnight before it.
What the source measured
SPC reported: Hail 150 in near 2 S Hills, Johnson, IA. penny to ping pong. (DVN)
An estimated 134,727 people live within 50 km of this point.
Nearby, since 11 March 2026
- March 16, 2026 · score 49 · 0.0 km
- March 15, 2026 · score 49 · 0.0 km
- March 11, 2026 · score 49 · 12.2 km
How we know
Confirmed by 2 independent sources, including SPC.
Our own score for this event is 49 out of 100, at 90 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | High |
| Calamity Score (ours) | 49 / 100 |
| Our confidence | 90% |
| Coordinates | 41.5500, -91.5300 |
| Nearest City | Iowa City (12 km) |
| Population Exposed | 134.7K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-03-16T02:49:34.352Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Score Breakdown
Technical Details
| ReportType | hail |
| Speed | 150 |
| Location | 2 S Hills |
| County | Johnson |
| State | IA |
| Comments | penny to ping pong. (DVN) |
| Iem TypeSummary | N |
| Iem Magnitude | 60 |
| Iem Unit | MPH |
| Iem City | 1 N Fairfield |
| Iem County | Jefferson |
| Iem State | IA |
| Iem Wfo | DVN |
| Iem Remark | AWOS station KFFL Fairfield Arpt. |
| MergedSources | [{"id":"iem_N_41.030_-91.970_1773620100000","source":"iem","severity":"low","severityValue":25,"timestamp":1773620100000,"latitude":41.03,"longitude":-91.97}] |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
Series begins 8 March 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Want to know when something happens near Iowa City?
Calamity.live data shows a weather event with CalamityScore 49/100, near Iowa City (United States), based on data from spc. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.