Right now
The most recent data we hold from NOAA arrived 9 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 20:30 UTC. It is kept here as a record.
No stronger detection stands among the 98 recorded within 20 km of this point since 15 March 2026 — 21 others scored the same. 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 4 at 3:20PM CDT until June 4 at 3:30PM CDT by NWS Norman OK
An estimated 419,628 people live within 50 km of this point.
Nearby, since 15 March 2026
- June 4, 2026 · score 43 · 1.8 km
- June 19, 2026 · score 43 · 2.0 km
- September 10, 2026 · score 37 · 8.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 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 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) | 43 / 100 |
| Our confidence | 81% |
| Coordinates | 37.3275, -97.4565 |
| Nearest City | Derby (30 km) |
| Population Exposed | 419.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-04T20:20:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.a534ca1ceedcec1698572f3929a2c761 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Alfalfa, OK; Garfield, OK; Grant, OK; Butler, KS; Sedgwick, KS; Sedgwick, KS |
| Headline | Severe Thunderstorm Warning issued June 4 at 3:20PM CDT until June 4 at 3:30PM CDT by NWS Norman OK |
| Expires | 2026-06-04T15:30:00-05:00 |
| SenderName | NWS Norman OK |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.a534ca1ceedcec1698572f3929a2c76184abcf15.001.1","noaa_urn:oid:2.49.0.1.840.0.e11aea601c83e3635b84aa6b6e66a37a215f59b0.001.1","noaa_urn:oid:2.49.0.1.840.0.c3cd03e6afc5d00b0213660d25d079f06011d23a.002.1"] |
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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