Right now
The most recent data we hold from NOAA arrived 25 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 20 May 2026 at 03:15 UTC. It is kept here as a record.
It is the 17th strongest of the 109 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 19 at 11:02PM EDT until May 19 at 11:15PM EDT by NWS Charleston WV
An estimated 90,308 people live within 50 km of this point.
Nearby, since 12 March 2026
- August 11, 2026 · score 43 · 5.2 km
- May 20, 2026 · score 43 · 6.7 km
- August 12, 2026 · score 39 · 10.7 km
How we know
Confirmed by 6 independent sources, including NOAA.
Our own score for this event is 39 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 | Medium |
| Calamity Score (ours) | 39 / 100 |
| Our confidence | 90% |
| Coordinates | 39.6480, -82.1100 |
| Nearest City | Zanesville (34 km) |
| Population Exposed | 90.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-20T03:02:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.778d309ca0fa35c3947f33d1ee79f4834549af4c.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Morgan, OH; Perry, OH |
| Headline | Severe Thunderstorm Warning issued May 19 at 11:02PM EDT until May 19 at 11:15PM EDT by NWS Charleston WV |
| Expires | 2026-05-19T23:15:00-04:00 |
| SenderName | NWS Charleston WV |
| HasExactCoords | true |
| Iem TypeSummary | G |
| Iem Magnitude | 46 |
| Iem Unit | MPH |
| Iem City | 3 E Pleasant Grove |
| Iem County | Muskingum |
| Iem State | OH |
| Iem Wfo | PBZ |
| Iem Remark | ASOS station KZZV Zanesville Airport. |
| MergedSources | [{"id":"iem_D_39.120_-81.730_1779228000000","source":"iem","severity":"low","severityValue":25,"timestamp":1779228000000,"latitude":39.12,"longitude":-81.73},{"id":"iem_D_39.880_-82.760_1779240600000","source":"iem","severity":"low","severityValue":25,"timestamp":1779240600000,"latitude":39.88,"longitude":-82.76},{"id":"iem_D_39.460_-81.820_1779228240000","source":"iem","severity":"low","severityValue":25,"timestamp":1779228240000,"latitude":39.46,"longitude":-81.82},{"id":"iem_D_39.900_-82.540_1779242040000","source":"iem","severity":"low","severityValue":25,"timestamp":1779242040000,"latitude":39.9,"longitude":-82.54},{"id":"iem_G_39.950_-81.900_1779243420000","source":"iem","severity":"low","severityValue":25,"timestamp":1779243420000,"latitude":39.95,"longitude":-81.9}] |
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.
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