This alert expired on 30 May 2026 at 03:00 UTC. It is kept here as a record.
No stronger detection stands among the 10 recorded within 20 km of this point since 28 May 2026 — 4 others scored the same. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued May 29 at 9:36AM EDT until May 30 at 3:20AM EDT by NWS Wilmington OH
An estimated 1,253,142 people live within 50 km of this point.
Nearby, since 28 May 2026
- May 28, 2026 · score 52 · 0.0 km
- July 11, 2026 · score 52 · 12.7 km
- July 11, 2026 · score 52 · 15.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 52 out of 100, at 77 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 52 / 100 |
| Our confidence | 77% |
| Coordinates | 39.6650, -82.9933 |
| Nearest City | Grove City (25 km) |
| Population Exposed | 1.3M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-29T13:36:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.b21c2c84e185baf86304bcfa9e293c32051eca17.001.1 |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Pickaway, OH |
| Headline | Flood Warning issued May 29 at 9:36AM EDT until May 30 at 3:20AM EDT by NWS Wilmington OH |
| Expires | 2026-05-29T23:00:00-04:00 |
| SenderName | NWS Wilmington OH |
| HasExactCoords | true |
Safety Information
During flooding: never walk, swim, or drive through floodwaters. Six inches of moving water can knock you down, and one foot of water can sweep away a vehicle. Move to higher ground if waters rise. After flooding, avoid contact with floodwater which may contain sewage, chemicals, or debris. Follow local emergency service guidance.
Series begins 10 February 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 Grove City?
Calamity.live data shows a weather event with CalamityScore 52/100, near Grove City (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.