Right now
The most recent data we hold from NOAA arrived 10 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 27 May 2026 at 22:30 UTC. It is kept here as a record.
It is the 6th strongest of the 60 detections recorded within 20 km of this point since 15 March 2026. The last comparable one was on 25 May 2026. 10 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued May 27 at 3:25PM EDT until May 27 at 6:30PM EDT by NWS Wilmington OH
An estimated 137,986 people live within 50 km of this point.
Nearby, since 15 March 2026
- July 18, 2026 · score 43 · 16.5 km
- July 17, 2026 · score 43 · 16.5 km
- August 1, 2026 · score 43 · 19.0 km
How we know
Confirmed by 15 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 89 % 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 | Medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 89% |
| Coordinates | 39.6460, -85.0080 |
| Nearest City | Richmond (23 km) |
| Population Exposed | 138.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-27T19:25:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.cb4a139f6a75d3c52ca1fcd9316d1c43417a0e58.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Fayette, IN; Franklin, IN; Union, IN; Wayne, IN |
| Headline | Flash Flood Warning issued May 27 at 3:25PM EDT until May 27 at 6:30PM EDT by NWS Wilmington OH |
| Expires | 2026-05-27T18:30:00-04:00 |
| SenderName | NWS Wilmington OH |
| HasExactCoords | true |
| Iem TypeSummary | E |
| Iem City | 3 W Ross |
| Iem County | Butler |
| Iem State | OH |
| Iem Wfo | ILN |
| Iem Remark | Water crossing Morgan-Ross at Cincinnati-Brookville. Driveway washed out. |
| MergedSources | [{"id":"iem_E_39.870_-84.680_1779897240000","source":"iem","severity":"low","severityValue":25,"timestamp":1779897240000,"latitude":39.87,"longitude":-84.68},{"id":"iem_D_39.510_-85.320_1779900960000","source":"iem","severity":"low","severityValue":25,"timestamp":1779900960000,"latitude":39.51,"longitude":-85.32},{"id":"iem_R_39.510_-85.320_1779914880000","source":"iem","severity":"low","severityValue":25,"timestamp":1779914880000,"latitude":39.51,"longitude":-85.32},{"id":"iem_E_39.490_-85.260_1779913080000","source":"iem","severity":"low","severityValue":25,"timestamp":1779913080000,"latitude":39.49,"longitude":-85.26},{"id":"iem_E_39.330_-84.750_1779907800000","source":"iem","severity":"low","severityValue":25,"timestamp":1779907800000,"latitude":39.33,"longitude":-84.75},{"id":"iem_E_39.780_-84.500_1779897420000","source":"iem","severity":"low","severityValue":25,"timestamp":1779897420000,"latitude":39.78,"longitude":-84.5},{"id":"iem_R_39.580_-85.810_1779914100000","source":"iem","severity":"low","severityValue":25,"timestamp":1779914100000,"latitude":39.58,"longitude":-85.81},{"id":"iem_E_39.830_-84.390_1779889500000","source":"iem","severity":"low","severityValue":25,"timestamp":1779889500000,"latitude":39.83,"longitude":-84.39},{"id":"iem_E_39.520_-85.020_1779913500000","source":"iem","severity":"low","severityValue":25,"timestamp":1779913500000,"latitude":39.52,"longitude":-85.02},{"id":"iem_E_39.850_-84.350_1779897960000","source":"iem","severity":"low","severityValue":25,"timestamp":1779897960000,"latitude":39.85,"longitude":-84.35},{"id":"iem_E_39.450_-85.060_1779913200000","source":"iem","severity":"low","severityValue":25,"timestamp":1779913200000,"latitude":39.45,"longitude":-85.06},{"id":"iem_R_39.670_-85.610_1779915060000","source":"iem","severity":"low","severityValue":25,"timestamp":1779915060000,"latitude":39.67,"longitude":-85.61},{"id":"iem_E_39.510_-85.320_1779914880000","source":"iem","severity":"low","severityValue":25,"timestamp":1779914880000,"latitude":39.51,"longitude":-85.32},{"id":"iem_E_39.320_-84.700_1779907680000","source":"iem","severity":"low","severityValue":25,"timestamp":1779907680000,"latitude":39.32,"longitude":-84.7}] |
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 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 Richmond?
Calamity.live data shows a weather event with CalamityScore 43/100, near Richmond (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.