Right now
The most recent data we hold from NOAA arrived 5 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 18 May 2026 at 01:15 UTC. It is kept here as a record.
No stronger detection stands among the 45 recorded within 20 km of this point since 16 March 2026 — 3 others scored the same. The last comparable one was on 17 May 2026. 17 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 17 at 7:51PM CDT until May 17 at 8:15PM CDT by NWS Topeka KS
Urban PEI: 294,757 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- May 16, 2026 · score 43 · 17.8 km
How we know
22 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 43 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) | 43 / 100 |
| Legacy data-support index | 0.89/1 |
| Coordinates | 40.5785, -97.1816 |
| Nearest City | Lincoln (50 km) |
| Urban exposure index (PEI) | 294.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-18T00:51:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.c1de0b92f10f30d1f189573e2578938d |
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: 2026-05-18T00:51:00.000Z.
First archived: 2026-05-18T00:52:36.302Z. 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 | Cloud, KS; Republic, KS; Ellsworth, KS; Lincoln, KS; Fillmore, NE; Thayer, NE and 14 more areas |
| Headline | Severe Thunderstorm Warning issued May 17 at 7:51PM CDT until May 17 at 8:15PM CDT by NWS Topeka KS |
| Expires | 2026-05-17T20:15:00-05:00 |
| SenderName | NWS Topeka KS |
| HasExactCoords | true |
| MergedCount | 17 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.c1de0b92f10f30d1f189573e2578938de3914fae.001.1","noaa_urn:oid:2.49.0.1.840.0.a06ba40b16a5a1f651e7cfd1cdd2c2f60a6d4d38.002.1","noaa_urn:oid:2.49.0.1.840.0.3268185c4edd56bb72ae6ae8a227db1103c81d4f.002.1","noaa_urn:oid:2.49.0.1.840.0.9e8c9a3f1ddc29e60fa62870e217bc38f640eec0.001.1","noaa_urn:oid:2.49.0.1.840.0.08e3b6c4b8709e6b4851f20dd1e5ee74ce0c6aee.001.1","noaa_urn:oid:2.49.0.1.840.0.6f7f6dcf96deacf861898f49314a249480fde72b.001.1","noaa_urn:oid:2.49.0.1.840.0.5dd96f9c4f76d040ca11b8d1c276e491c2804766.001.1","noaa_urn:oid:2.49.0.1.840.0.36b2004e1d39c314f79d82aade28a4eae9bc7dee.001.1","noaa_urn:oid:2.49.0.1.840.0.ea40d5d677b26e4c243bdd2bd568a662c2d004c6.001.1","noaa_urn:oid:2.49.0.1.840.0.838fd0160f83584e2155ef4181f3a6c9a588179f.001.1","noaa_urn:oid:2.49.0.1.840.0.bdf6b08e84e31c8f28a00894a794d592cec3bdc4.002.1","noaa_urn:oid:2.49.0.1.840.0.f7871fc5f55f6e3ee2c563153e7b48389cbd97bb.001.1","noaa_urn:oid:2.49.0.1.840.0.1dcb44c75fdf4d69b6a2b632f13291f77b37fe17.001.1","noaa_urn:oid:2.49.0.1.840.0.9295fb6532ab1ab3b34b03b6d9893098017bc113.001.1","noaa_urn:oid:2.49.0.1.840.0.579f6e89124271c113b082f4499eef0959ddc02b.001.1","noaa_urn:oid:2.49.0.1.840.0.f3e29a74d6e271116a3fd283f82e373f27e2ff17.001.1","noaa_urn:oid:2.49.0.1.840.0.3242e8b2d11933383eea906a6a09b87048bf0b3a.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 57 |
| Iem Unit | MPH |
| Iem City | 4 NNW Strang |
| Iem County | Fillmore |
| Iem State | NE |
| Iem Wfo | GID |
| Google News RssFeed | weather |
| Google News SourceName | KOLN | Nebraska Local News, Weather, Sports | Lincoln, NE |
| MergedSources | [{"id":"iem_G_40.420_-97.590_1779059280000","source":"iem","severity":"low","severityValue":25,"timestamp":1779059280000,"latitude":40.42,"longitude":-97.59},{"id":"iem_G_40.410_-97.590_1779063960000","source":"iem","severity":"low","severityValue":25,"timestamp":1779063960000,"latitude":40.41,"longitude":-97.59},{"id":"iem_D_40.650_-97.280_1779060900000","source":"iem","severity":"low","severityValue":25,"timestamp":1779060900000,"latitude":40.65,"longitude":-97.28},{"id":"iem_G_40.470_-97.600_1779059280000","source":"iem","severity":"low","severityValue":25,"timestamp":1779059280000,"latitude":40.47,"longitude":-97.6},{"id":"iem_G_40.480_-97.580_1779059400000","source":"iem","severity":"low","severityValue":25,"timestamp":1779059400000,"latitude":40.48,"longitude":-97.58},{"id":"iem_G_40.330_-97.590_1779060780000","source":"iem","severity":"low","severityValue":25,"timestamp":1779060780000,"latitude":40.33,"longitude":-97.59},{"id":"iem_G_40.180_-97.780_1779060600000","source":"iem","severity":"low","severityValue":25,"timestamp":1779060600000,"latitude":40.18,"longitude":-97.78},{"id":"iem_G_40.520_-98.050_1779058020000","source":"iem","severity":"low","severityValue":25,"timestamp":1779058020000,"latitude":40.52,"longitude":-98.05},{"id":"iem_G_40.310_-97.900_1779057360000","source":"iem","severity":"low","severityValue":25,"timestamp":1779057360000,"latitude":40.31,"longitude":-97.9},{"id":"iem_G_40.280_-97.920_1779057300000","source":"iem","severity":"low","severityValue":25,"timestamp":1779057300000,"latitude":40.28,"longitude":-97.92},{"id":"iem_G_40.550_-97.560_1779059700000","source":"iem","severity":"low","severityValue":25,"timestamp":1779059700000,"latitude":40.55,"longitude":-97.56},{"id":"iem_H_40.140_-97.730_1779060840000","source":"iem","severity":"low","severityValue":25,"timestamp":1779060840000,"latitude":40.14,"longitude":-97.73},{"id":"iem_H_40.240_-97.770_1779062520000","source":"iem","severity":"low","severityValue":25,"timestamp":1779062520000,"latitude":40.24,"longitude":-97.77},{"id":"iem_G_40.460_-97.480_1779062820000","source":"iem","severity":"low","severityValue":25,"timestamp":1779062820000,"latitude":40.46,"longitude":-97.48},{"id":"iem_H_40.460_-98.020_1779057900000","source":"iem","severity":"low","severityValue":25,"timestamp":1779057900000,"latitude":40.46,"longitude":-98.02},{"id":"iem_G_40.130_-97.800_1779059940000","source":"iem","severity":"low","severityValue":25,"timestamp":1779059940000,"latitude":40.13,"longitude":-97.8},{"id":"iem_H_40.750_-97.850_1779059160000","source":"iem","severity":"low","severityValue":25,"timestamp":1779059160000,"latitude":40.75,"longitude":-97.85},{"id":"iem_T_40.140_-97.600_1779061380000","source":"iem","severity":"low","severityValue":25,"timestamp":1779061380000,"latitude":40.14,"longitude":-97.6},{"id":"iem_G_40.470_-97.630_1779059220000","source":"iem","severity":"low","severityValue":25,"timestamp":1779059220000,"latitude":40.47,"longitude":-97.63},{"id":"gnews_weather_494179_136","source":"google_news","severity":"medium","severityValue":40,"timestamp":1779044640000,"latitude":40.8,"longitude":-96.67},{"id":"gnews_weather_494179_153","source":"google_news","severity":"medium","severityValue":40,"timestamp":1779045572000,"latitude":40.8,"longitude":-96.67}] |
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.
Review the area, threshold and delivery channel in your account.
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