Right now
The most recent data we hold from NOAA arrived 9 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 10 May 2026 at 13:15 UTC. It is kept here as a record.
It is the 8th strongest of the 92 detections recorded within 20 km of this point since 17 March 2026. The last comparable one was on 9 May 2026. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued May 9 at 11:11PM EDT until May 11 at 8:35AM EDT by NWS Cleveland OH
An estimated 454,427 people live within 50 km of this point.
Nearby, since 17 March 2026
- May 10, 2026 · score 43 · 0.0 km
- May 7, 2026 · score 43 · 0.0 km
- September 2, 2026 · score 41 · 5.7 km
How we know
Confirmed by 18 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 91 % 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 | 91% |
| Coordinates | 41.2800, -80.9529 |
| Nearest City | Warren (12 km) |
| Population Exposed | 454.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-10T03:28:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.9bddc65e666ed5da32fbf1d5273097902ae12661.001.1 |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Expected |
| Certainty | Likely |
| AreaDesc | Trumbull, OH |
| Headline | Flood Warning issued May 9 at 11:11PM EDT until May 11 at 8:35AM EDT by NWS Cleveland OH |
| Expires | 2026-05-10T09:15:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
| Iem TypeSummary | D |
| Iem City | 1 W Chardon |
| Iem County | Geauga |
| Iem State | OH |
| Iem Wfo | CLE |
| Iem Remark | Two trees downed in Chardon. |
| MergedSources | [{"id":"iem_M_41.760_-81.280_1778365800000","source":"iem","severity":"low","severityValue":25,"timestamp":1778365800000,"latitude":41.76,"longitude":-81.28},{"id":"iem_M_41.500_-81.730_1778365500000","source":"iem","severity":"low","severityValue":25,"timestamp":1778365500000,"latitude":41.5,"longitude":-81.73},{"id":"iem_D_41.530_-81.240_1778367000000","source":"iem","severity":"low","severityValue":25,"timestamp":1778367000000,"latitude":41.53,"longitude":-81.24},{"id":"iem_M_41.550_-81.770_1778365200000","source":"iem","severity":"low","severityValue":25,"timestamp":1778365200000,"latitude":41.55,"longitude":-81.77},{"id":"iem_G_41.520_-81.680_1778366160000","source":"iem","severity":"low","severityValue":25,"timestamp":1778366160000,"latitude":41.52,"longitude":-81.68},{"id":"iem_D_41.150_-80.640_1778371200000","source":"iem","severity":"low","severityValue":25,"timestamp":1778371200000,"latitude":41.15,"longitude":-80.64},{"id":"iem_D_41.180_-80.510_1778371260000","source":"iem","severity":"low","severityValue":25,"timestamp":1778371260000,"latitude":41.18,"longitude":-80.51},{"id":"iem_M_41.760_-81.330_1778366400000","source":"iem","severity":"low","severityValue":25,"timestamp":1778366400000,"latitude":41.76,"longitude":-81.33},{"id":"iem_M_41.590_-81.580_1778365800000","source":"iem","severity":"low","severityValue":25,"timestamp":1778365800000,"latitude":41.59,"longitude":-81.58},{"id":"iem_D_41.680_-81.050_1778366400000","source":"iem","severity":"low","severityValue":25,"timestamp":1778366400000,"latitude":41.68,"longitude":-81.05},{"id":"iem_D_41.340_-80.980_1778368800000","source":"iem","severity":"low","severityValue":25,"timestamp":1778368800000,"latitude":41.34,"longitude":-80.98},{"id":"iem_D_41.250_-80.850_1778370120000","source":"iem","severity":"low","severityValue":25,"timestamp":1778370120000,"latitude":41.25,"longitude":-80.85},{"id":"iem_D_41.210_-80.500_1778371320000","source":"iem","severity":"low","severityValue":25,"timestamp":1778371320000,"latitude":41.21,"longitude":-80.5},{"id":"iem_D_41.410_-81.780_1778365920000","source":"iem","severity":"low","severityValue":25,"timestamp":1778365920000,"latitude":41.41,"longitude":-81.78},{"id":"iem_D_41.260_-80.940_1778369820000","source":"iem","severity":"low","severityValue":25,"timestamp":1778369820000,"latitude":41.26,"longitude":-80.94},{"id":"iem_D_41.570_-81.390_1778366280000","source":"iem","severity":"low","severityValue":25,"timestamp":1778366280000,"latitude":41.57,"longitude":-81.39},{"id":"iem_D_41.580_-81.220_1778367000000","source":"iem","severity":"low","severityValue":25,"timestamp":1778367000000,"latitude":41.58,"longitude":-81.22}] |
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.
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