Right now
The most recent data we hold from NOAA arrived 70 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 19 May 2026 at 01:00 UTC. It is kept here as a record.
It is the 3rd strongest of the 31 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 18 at 7:46PM CDT until May 18 at 8:00PM CDT by NWS Omaha/Valley NE
Nearby, since 15 March 2026
- June 6, 2026 · score 22 · 22.2 km
How we know
5 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 22 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) | 22 / 100 |
| Legacy data-support index | 0.70/1 |
| Coordinates | 39.5297, -95.8779 |
| Nearest City | Topeka (56 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-05-19T00:46:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.741c23fd2b4ca5707635f061961d485f |
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: 2026-05-19T00:46:00.000Z.
First archived: 2026-05-19T00:50:14.639Z. 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 | Page, IA; Jackson, KS; Jefferson, KS; Brown, KS and 10 more areas |
| Headline | Severe Thunderstorm Warning issued May 18 at 7:46PM CDT until May 18 at 8:00PM CDT by NWS Omaha/Valley NE |
| Expires | 2026-05-18T20:00:00-05:00 |
| SenderName | NWS Omaha/Valley NE |
| HasExactCoords | true |
| MergedCount | 13 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.741c23fd2b4ca5707635f061961d485fae4967b0.001.1","noaa_urn:oid:2.49.0.1.840.0.433b1b4a261bd7f256b787678574f5d9ecacf8e3.002.1","noaa_urn:oid:2.49.0.1.840.0.5d95cea8b14e22735f97a44f57f477a7a9068ec8.002.1","noaa_urn:oid:2.49.0.1.840.0.7119a98149e3519cb77b2cadb8465b42589d781e.001.1","noaa_urn:oid:2.49.0.1.840.0.26861b4088593e8caed40ac972e9c59c65d0bab2.001.1","noaa_urn:oid:2.49.0.1.840.0.28c79235a5ba8f4f002c722ccbec739f0c9ac919.001.1","noaa_urn:oid:2.49.0.1.840.0.0cf6b305a0e7444d6e7397e24a2e025e1180340f.002.1","noaa_urn:oid:2.49.0.1.840.0.e972331356a184fc234e0ff633770105f6285792.002.1","noaa_urn:oid:2.49.0.1.840.0.8aeeb96fa7eb007b2bcbcfaeb3170c02ddb9c03e.001.1","noaa_urn:oid:2.49.0.1.840.0.18c9b861a746e7143096f43406a77cb0bee71c2a.001.1","noaa_urn:oid:2.49.0.1.840.0.69c489161c76c18bcfea979451b8a87d41bb711f.001.1","noaa_urn:oid:2.49.0.1.840.0.48d743ee90986a8840c2f045200de0f10ed74d91.001.1","noaa_urn:oid:2.49.0.1.840.0.2f7d1806147c255b31011e3727e435d878c00af9.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 65 |
| Iem Unit | MPH |
| Iem City | 4 S Holton |
| Iem County | Jackson |
| Iem State | KS |
| Iem Wfo | TOP |
| Iem Remark | Measured on a personal weather station. |
| MergedSources | [{"id":"iem_G_39.230_-96.340_1779148140000","source":"iem","severity":"low","severityValue":25,"timestamp":1779148140000,"latitude":39.23,"longitude":-96.34},{"id":"iem_T_40.070_-95.820_1779141600000","source":"iem","severity":"low","severityValue":25,"timestamp":1779141600000,"latitude":40.07,"longitude":-95.82},{"id":"iem_T_40.170_-95.620_1779142500000","source":"iem","severity":"low","severityValue":25,"timestamp":1779142500000,"latitude":40.17,"longitude":-95.62},{"id":"iem_G_39.400_-95.750_1779150360000","source":"iem","severity":"low","severityValue":25,"timestamp":1779150360000,"latitude":39.4,"longitude":-95.75}] |
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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