This alert expired on 4 July 2026 at 01:00 UTC. It is kept here as a record.
It is the 6th strongest of the 19 detections recorded within 20 km of this point since 31 March 2026. The last comparable one was on 18 June 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 3 at 8:02PM EDT until July 3 at 9:00PM EDT by NWS Cleveland OH
An estimated 477,386 people live within 50 km of this point.
Nearby, since 31 March 2026
- July 4, 2026 · score 48 · 8.9 km
- July 6, 2026 · score 43 · 12.0 km
- June 18, 2026 · score 67 · 12.3 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 84 % 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) | 43 / 100 |
| Our confidence | 84% |
| Coordinates | 41.1448, -82.3587 |
| Nearest City | Norwalk (24 km) |
| Population Exposed | 477.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-04T00:02:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.23bc24d5a5660cd566bfdbca6747a69c |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Cuyahoga, OH; Lorain, OH; Armstrong, PA; Butler, PA; Clarion, PA; Venango, PA; Erie, OH; Huron, OH; Lorain, OH; Sandusky, OH and 2 more areas |
| Headline | Severe Thunderstorm Warning issued July 3 at 8:02PM EDT until July 3 at 9:00PM EDT by NWS Cleveland OH |
| Expires | 2026-07-03T21:00:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.23bc24d5a5660cd566bfdbca6747a69c85461f87.001.1","noaa_urn:oid:2.49.0.1.840.0.14ed9d519b6737e4c0515a4664c0abad34579c5d.001.1","noaa_urn:oid:2.49.0.1.840.0.0dae8dc4acef9b49df3c9a476590dc770aeebfba.002.1","noaa_urn:oid:2.49.0.1.840.0.cae5c42e8c1f7cd7846d3a140becb2b12674aa0c.001.1","noaa_urn:oid:2.49.0.1.840.0.4d2e073bcfe6c14f233c2670b32a4d32f5fb0e64.002.1"] |
| Iem TypeSummary | M |
| Iem Magnitude | 43 |
| Iem Unit | MPH |
| Iem City | 2 N Port Clinton |
| Iem County | LEZ143 |
| Iem State | OH |
| Iem Wfo | CLE |
| Iem Remark | Corrects previous tstm wnd gst report from 2 N Port Clinton. Mesonet station 45202 1 N Port Clinton. Peak wind 37 knots. |
| MergedSources | [{"id":"iem_M_41.530_-82.940_1783119600000","source":"iem","severity":"low","severityValue":25,"timestamp":1783119600000,"latitude":41.53,"longitude":-82.94}] |
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 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 43/100, near Norwalk (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.