Right now
The most recent data we hold from NOAA arrived 4 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 21 June 2026 at 05:15 UTC. It is kept here as a record.
It is the 3rd strongest of the 10 detections recorded within 20 km of this point since 15 April 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 20 at 11:56PM CDT until June 21 at 12:15AM CDT by NWS Topeka KS
Urban PEI: 15,717 within a heuristic 50 km radius; not unique people.
Nearby, since 15 April 2026
- June 21, 2026 · score 39 · 19.9 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 34 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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) | 34 / 100 |
| Legacy data-support index | 0.86/1 |
| Coordinates | 38.1378, -98.5291 |
| Nearest City | Great Bend (32 km) |
| Urban exposure index (PEI) | 15.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-21T04:56:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.d91fe32f086aeaf4a9bd7ba0c39aea59 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-06-21T04:56:00.000Z.
First archived: 2026-06-21T04:59:43.722Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Marshall, KS; Nemaha, KS; Pottawatomie, KS; Riley, KS; Barton, KS; Ellsworth, KS; Lincoln, KS; Russell, KS; Clark, KS; Edwards, KS; Ford, KS; Kiowa, KS and 4 more areas |
| Headline | Severe Thunderstorm Warning issued June 20 at 11:56PM CDT until June 21 at 12:15AM CDT by NWS Topeka KS |
| Expires | 2026-06-21T00:15:00-05:00 |
| SenderName | NWS Topeka KS |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d91fe32f086aeaf4a9bd7ba0c39aea5931b9c490.001.1","noaa_urn:oid:2.49.0.1.840.0.e7c6407b41d23a8cab8ab4cbcc384605f34f5522.001.1","noaa_urn:oid:2.49.0.1.840.0.78e526e2d00fa38ba9f98f634d1ecffecbd9dda8.002.1","noaa_urn:oid:2.49.0.1.840.0.7c15ee1d7562bc718c1f89ef5f617d6f722326ed.001.1","noaa_urn:oid:2.49.0.1.840.0.04ab2fa89e5462c0d6d9c0a0ff46d25ef166cffd.002.1","noaa_urn:oid:2.49.0.1.840.0.aaa214aae9d75e43c28b9d7a61ed3fb25f2fd690.001.1","noaa_urn:oid:2.49.0.1.840.0.baf42d39e9c9b5358a3b7b8602765953abcbc44a.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 72 |
| Iem Unit | MPH |
| Iem City | 1 N Macksville |
| Iem County | Stafford |
| Iem State | KS |
| Iem Wfo | DDC |
| Iem Remark | Report was from a AWN weather station. |
| MergedSources | [{"id":"iem_G_37.970_-98.970_1782015420000","source":"iem","severity":"low","severityValue":25,"timestamp":1782015420000,"latitude":37.97,"longitude":-98.97}] |
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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