This alert expired on 11 August 2026 at 12:45 UTC. It is kept here as a record.
No stronger detection stands among the 55 recorded within 20 km of this point since 22 March 2026 — 26 others scored the same. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued August 11 at 2:43AM EDT until August 11 at 8:45AM EDT by NWS Pittsburgh PA
An estimated 1,355,573 people live within 50 km of this point.
Nearby, since 22 March 2026
- July 10, 2026 · score 52 · 11.9 km
- August 8, 2026 · score 52 · 13.5 km
- May 26, 2026 · score 52 · 14.0 km
How we know
Confirmed by 14 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 91 % 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 | 91% |
| Coordinates | 40.1820, -82.8159 |
| Nearest City | Westerville (11 km) |
| Population Exposed | 1.4M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-11T06:43:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flood Warning_noaa_urn:oid:2.49.0.1.840.0.d594830f49b997d731fccce4bfca8536 |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Expected |
| Certainty | Likely |
| AreaDesc | Muskingum, OH; Hardin, OH; Logan, OH; Union, OH |
| Headline | Flood Warning issued August 11 at 2:43AM EDT until August 11 at 8:45AM EDT by NWS Pittsburgh PA |
| Expires | 2026-08-11T08:45:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d594830f49b997d731fccce4bfca85361e963c27.001.1","noaa_urn:oid:2.49.0.1.840.0.4908e6097d9d9a14be33e9925ba241aea71a240f.001.1"] |
| Iem TypeSummary | D |
| Iem City | 2 NE Sparta |
| Iem County | Morrow |
| Iem State | OH |
| Iem Wfo | CLE |
| Iem Remark | One tree down at County roads 19 and 21 in S Bloomfield Township. Time estimated from radar. |
| Google News RssFeed | weather |
| Google News SourceName | myfox28columbus.com |
| MergedSources | [{"id":"iem_D_40.750_-82.530_1786420320000","source":"iem","severity":"low","severityValue":25,"timestamp":1786420320000,"latitude":40.75,"longitude":-82.53},{"id":"iem_G_40.760_-82.530_1786421700000","source":"iem","severity":"low","severityValue":25,"timestamp":1786421700000,"latitude":40.76,"longitude":-82.53},{"id":"iem_D_39.730_-82.300_1786415280000","source":"iem","severity":"low","severityValue":25,"timestamp":1786415280000,"latitude":39.73,"longitude":-82.3},{"id":"iem_E_40.760_-82.530_1786421700000","source":"iem","severity":"low","severityValue":25,"timestamp":1786421700000,"latitude":40.76,"longitude":-82.53},{"id":"iem_D_40.420_-82.830_1786416540000","source":"iem","severity":"low","severityValue":25,"timestamp":1786416540000,"latitude":40.42,"longitude":-82.83},{"id":"iem_G_40.080_-83.080_1786420140000","source":"iem","severity":"low","severityValue":25,"timestamp":1786420140000,"latitude":40.08,"longitude":-83.08},{"id":"iem_D_40.810_-82.980_1786419300000","source":"iem","severity":"low","severityValue":25,"timestamp":1786419300000,"latitude":40.81,"longitude":-82.98},{"id":"iem_G_39.990_-82.880_1786420080000","source":"iem","severity":"low","severityValue":25,"timestamp":1786420080000,"latitude":39.99,"longitude":-82.88},{"id":"iem_D_39.630_-82.550_1786422600000","source":"iem","severity":"low","severityValue":25,"timestamp":1786422600000,"latitude":39.63,"longitude":-82.55},{"id":"iem_D_40.420_-82.670_1786417380000","source":"iem","severity":"low","severityValue":25,"timestamp":1786417380000,"latitude":40.42,"longitude":-82.67},{"id":"gnews_weather_496224_279","source":"google_news","severity":"medium","severityValue":40,"timestamp":1786409700000,"latitude":39.96,"longitude":-83},{"id":"gnews_weather_496228_283","source":"google_news","severity":"medium","severityValue":40,"timestamp":1786420922000,"latitude":39.96,"longitude":-83},{"id":"gnews_weather_496226_314","source":"google_news","severity":"medium","severityValue":40,"timestamp":1786415791000,"latitude":39.96,"longitude":-83}] |
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.
Calamity.live data shows a weather event with CalamityScore 52/100, near Westerville (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.