Right now
The most recent data we hold from NOAA arrived 40 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
This alert expired on 17 May 2026 at 06:00 UTC. It is kept here as a record.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 17 at 12:16AM CDT until May 17 at 1:00AM CDT by NWS Topeka KS
How we know
10 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 | 40.0361, -96.1878 |
| Nearest City | Lincoln (94 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-05-17T05:16:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.cb7fe1a96771699fd588607ae694e6bb |
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: 2026-05-17T05:16:00.000Z.
First archived: 2026-05-17T05:18:51.613Z. 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; Clay, KS; Cloud, KS; Dickinson, KS; Geary, KS; Ottawa, KS; Pottawatomie, KS; Riley, KS; Marshall, KS; Washington, KS and 4 more areas |
| Headline | Severe Thunderstorm Warning issued May 17 at 12:16AM CDT until May 17 at 1:00AM CDT by NWS Topeka KS |
| Expires | 2026-05-17T01:00:00-05:00 |
| SenderName | NWS Topeka KS |
| HasExactCoords | true |
| MergedCount | 8 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.cb7fe1a96771699fd588607ae694e6bb90926ee1.001.1","noaa_urn:oid:2.49.0.1.840.0.bde4843e55076990d5ace0a081a4adf6c08e1c3a.001.1","noaa_urn:oid:2.49.0.1.840.0.f464e2d7fa6dba99a0b27fe0f32eb7ca0a164232.001.1","noaa_urn:oid:2.49.0.1.840.0.603383e6fdc8c73fd1db77726cd87fe9f0ae9ae8.001.1","noaa_urn:oid:2.49.0.1.840.0.b6e5dd350012750c8b91e00b55562498a536b3c1.001.1","noaa_urn:oid:2.49.0.1.840.0.15c6b6d1c0c31b113e90418bf9775533b57695e0.001.1","noaa_urn:oid:2.49.0.1.840.0.be8955ce43018d1f9daf3050823e447080ccf66c.001.1","noaa_urn:oid:2.49.0.1.840.0.ae5c8333affc6bcf16dcdfb1f1218f7e5ab75217.001.1"] |
| Iem TypeSummary | F |
| Iem City | 1 S Sterling |
| Iem County | Johnson |
| Iem State | NE |
| Iem Wfo | OAX |
| Iem Remark | Measured 3.10" so far. Flooding seen in fields and low lying areas. |
| MergedSources | [{"id":"iem_E_40.370_-96.610_1778986800000","source":"iem","severity":"low","severityValue":25,"timestamp":1778986800000,"latitude":40.37,"longitude":-96.61},{"id":"iem_E_40.470_-96.500_1778989020000","source":"iem","severity":"low","severityValue":25,"timestamp":1778989020000,"latitude":40.47,"longitude":-96.5},{"id":"iem_H_40.400_-96.920_1778979780000","source":"iem","severity":"low","severityValue":25,"timestamp":1778979780000,"latitude":40.4,"longitude":-96.92},{"id":"iem_H_40.390_-96.880_1778981220000","source":"iem","severity":"low","severityValue":25,"timestamp":1778981220000,"latitude":40.39,"longitude":-96.88},{"id":"iem_F_40.460_-96.510_1778987760000","source":"iem","severity":"low","severityValue":25,"timestamp":1778987760000,"latitude":40.46,"longitude":-96.51},{"id":"iem_H_40.380_-96.930_1778979420000","source":"iem","severity":"low","severityValue":25,"timestamp":1778979420000,"latitude":40.38,"longitude":-96.93},{"id":"iem_T_40.300_-96.640_1778984220000","source":"iem","severity":"low","severityValue":25,"timestamp":1778984220000,"latitude":40.3,"longitude":-96.64},{"id":"iem_E_40.410_-96.740_1778987880000","source":"iem","severity":"low","severityValue":25,"timestamp":1778987880000,"latitude":40.41,"longitude":-96.74},{"id":"iem_F_40.450_-96.380_1778992260000","source":"iem","severity":"low","severityValue":25,"timestamp":1778992260000,"latitude":40.45,"longitude":-96.38}] |
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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