Right now
The most recent data we hold from NOAA arrived 5 minutes ago, and this point is in it.
3 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
This alert expired on 9 September 2026 at 02:15 UTC. It is kept here as a record.
No stronger detection stands among the 106 recorded within 20 km of this point since 11 March 2026 — 6 others scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Tornado Warning issued September 8 at 9:03PM CDT until September 8 at 9:15PM CDT by NWS Quad Cities IA IL
An estimated 278,494 people live within 50 km of this point.
Nearby, since 11 March 2026
- September 9, 2026 · score 67 · 0.0 km
- March 11, 2026 · score 49 · 5.2 km
- July 5, 2026 · score 43 · 5.2 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 67 out of 100, at 81 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Critical |
| Calamity Score (ours) | 67 / 100 |
| Our confidence | 81% |
| Coordinates | 41.9400, -91.6033 |
| Nearest City | Cedar Rapids (8 km) |
| Population Exposed | 278.5K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-09-09T02:03:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.23ea507e4dea86d52e9992535a53f16b7bf16c79.002.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Linn, IA |
| Headline | Tornado Warning issued September 8 at 9:03PM CDT until September 8 at 9:15PM CDT by NWS Quad Cities IA IL |
| Expires | 2026-09-08T21:15:00-05:00 |
| SenderName | NWS Quad Cities IA IL |
| HasExactCoords | true |
Safety Information
If a tornado warning is issued: go to a basement or an interior room on the lowest floor, away from windows. A vehicle and a mobile home are not shelter. Cover your head and neck. Wait for the official all-clear before going outside, and watch for downed power lines and gas leaks afterwards.
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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