Right now
The most recent data we hold from NOAA arrived 2 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 1 June 2026 at 04:00 UTC. It is kept here as a record.
No stronger detection stands among the 38 recorded within 20 km of this point since 10 April 2026 — 6 others scored the same. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 31 at 10:47PM CDT until May 31 at 11:00PM CDT by NWS Topeka KS
Urban PEI: 24,649 within a heuristic 50 km radius; not unique people.
Nearby, since 10 April 2026
- September 13, 2026 · score 28 · 6.1 km
- August 7, 2026 · score 34 · 10.4 km
How we know
3 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 40 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 | High |
| Calamity Score (ours) | 40 / 100 |
| Legacy data-support index | 0.89/1 |
| Coordinates | 38.3969, -96.6175 |
| Nearest City | Emporia (38 km) |
| Urban exposure index (PEI) | 24.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-01T03:47:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.13e8375ac7dce8dbc11d4c1c2dd16028 |
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: 2026-06-01T03:47:00.000Z.
First archived: 2026-06-01T03:52:28.839Z. 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 | Lyon, KS; Marion, KS; Dickinson, KS and 1 more areas |
| Headline | Severe Thunderstorm Warning issued May 31 at 10:47PM CDT until May 31 at 11:00PM CDT by NWS Topeka KS |
| Expires | 2026-05-31T23:00:00-05:00 |
| SenderName | NWS Topeka KS |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.13e8375ac7dce8dbc11d4c1c2dd160283df6642f.002.1","noaa_urn:oid:2.49.0.1.840.0.b45fe72f2ce25daf8db0325a2885bc89cf0f7473.001.1","noaa_urn:oid:2.49.0.1.840.0.a1fe6667450693b3db601085bd22421c0d3dc1f7.001.1","noaa_urn:oid:2.49.0.1.840.0.1c1af6c0905fdca30491202e50f6d9346b04c6da.001.1"] |
| Spc ReportType | hail |
| Spc Speed | 125 |
| Spc Location | 10 S Saffordville |
| Spc County | Chase |
| Spc State | KS |
| Spc Comments | Report from mPING: Half Dollar (1.25 in.). (ICT) |
| Iem TypeSummary | H |
| Iem Magnitude | 1.25 |
| Iem Unit | Inch |
| Iem City | 10 S Saffordville |
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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