Right now
The most recent data we hold from NOAA arrived 5 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 4 June 2026 at 22:15 UTC. It is kept here as a record.
It is the 9th strongest of the 47 detections recorded within 20 km of this point since 15 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 June 4 at 4:47PM CDT until June 4 at 5:15PM CDT by NWS Topeka KS
Nearby, since 15 March 2026
- May 17, 2026 · score 46 · 1.6 km
- July 31, 2026 · score 22 · 16.7 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 61 % 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) | 22 / 100 |
| Our confidence | 61% |
| Coordinates | 39.7739, -96.2753 |
| Nearest City | Manhattan (71 km) |
| Impact Tier | minor |
| Timestamp | 2026-06-04T21:47:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.6bee9de9b169f495c7695cbaeeab8959 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Brown, KS; Marshall, KS; Riley, KS; Washington, KS; Marshall, KS |
| Headline | Severe Thunderstorm Warning issued June 4 at 4:47PM CDT until June 4 at 5:15PM CDT by NWS Topeka KS |
| Expires | 2026-06-04T17:15:00-05:00 |
| SenderName | NWS Topeka KS |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.6bee9de9b169f495c7695cbaeeab89595230b561.001.1","noaa_urn:oid:2.49.0.1.840.0.910f5427c26eb30f44a15008a48b744ca3ac6cc8.002.1","noaa_urn:oid:2.49.0.1.840.0.5d8c35e3bb78f323dc214458f021b1f6573d6f3c.001.1"] |
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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