Right now
The most recent data we hold from NOAA arrived 1 minute 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 21 June 2026 at 00:15 UTC. It is kept here as a record.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 20 at 7:04PM CDT until June 20 at 7:15PM CDT by NWS Hastings NE
Urban PEI: 51,440 within a heuristic 50 km radius; not unique people.
How we know
16 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 39 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) | 39 / 100 |
| Legacy data-support index | 0.89/1 |
| Coordinates | 41.0190, -98.6190 |
| Nearest City | Grand Island (25 km) |
| Urban exposure index (PEI) | 51.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-21T00:04:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.af03f651f42d648a3ba75e1d4dcfc1a77ad49a6e.002.1 |
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: 2026-06-21T00:04:00.000Z.
First archived: 2026-06-21T00:09:40.420Z. 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 | Buffalo, NE; Hall, NE; Howard, NE |
| Headline | Severe Thunderstorm Warning issued June 20 at 7:04PM CDT until June 20 at 7:15PM CDT by NWS Hastings NE |
| Expires | 2026-06-20T19:15:00-05:00 |
| SenderName | NWS Hastings NE |
| HasExactCoords | true |
| Iem TypeSummary | G |
| Iem Magnitude | 60 |
| Iem Unit | MPH |
| Iem City | 6 ENE Hazard |
| Iem County | Sherman |
| Iem State | NE |
| Iem Wfo | GID |
| MergedSources | [{"id":"iem_D_41.330_-98.910_1781997480000","source":"iem","severity":"low","severityValue":25,"timestamp":1781997480000,"latitude":41.33,"longitude":-98.91},{"id":"iem_R_40.780_-98.400_1781982660000","source":"iem","severity":"low","severityValue":25,"timestamp":1781982660000,"latitude":40.78,"longitude":-98.4},{"id":"iem_R_40.500_-98.260_1781983020000","source":"iem","severity":"low","severityValue":25,"timestamp":1781983020000,"latitude":40.5,"longitude":-98.26},{"id":"iem_R_40.810_-98.630_1781982000000","source":"iem","severity":"low","severityValue":25,"timestamp":1781982000000,"latitude":40.81,"longitude":-98.63},{"id":"iem_R_40.570_-98.380_1781982060000","source":"iem","severity":"low","severityValue":25,"timestamp":1781982060000,"latitude":40.57,"longitude":-98.38},{"id":"iem_G_41.280_-98.920_1781997180000","source":"iem","severity":"low","severityValue":25,"timestamp":1781997180000,"latitude":41.28,"longitude":-98.92},{"id":"iem_H_41.120_-98.970_1781998680000","source":"iem","severity":"low","severityValue":25,"timestamp":1781998680000,"latitude":41.12,"longitude":-98.97},{"id":"iem_D_41.120_-98.830_1781998980000","source":"iem","severity":"low","severityValue":25,"timestamp":1781998980000,"latitude":41.12,"longitude":-98.83},{"id":"iem_R_40.670_-98.490_1781982840000","source":"iem","severity":"low","severityValue":25,"timestamp":1781982840000,"latitude":40.67,"longitude":-98.49},{"id":"iem_G_41.470_-98.940_1781996640000","source":"iem","severity":"low","severityValue":25,"timestamp":1781996640000,"latitude":41.47,"longitude":-98.94},{"id":"iem_G_41.030_-98.910_1781999220000","source":"iem","severity":"low","severityValue":25,"timestamp":1781999220000,"latitude":41.03,"longitude":-98.91},{"id":"iem_R_40.820_-98.600_1781982660000","source":"iem","severity":"low","severityValue":25,"timestamp":1781982660000,"latitude":40.82,"longitude":-98.6},{"id":"iem_R_40.650_-98.380_1781980200000","source":"iem","severity":"low","severityValue":25,"timestamp":1781980200000,"latitude":40.65,"longitude":-98.38},{"id":"iem_E_40.710_-98.420_1781979780000","source":"iem","severity":"low","severityValue":25,"timestamp":1781979780000,"latitude":40.71,"longitude":-98.42},{"id":"iem_G_41.120_-98.970_1781998680000","source":"iem","severity":"low","severityValue":25,"timestamp":1781998680000,"latitude":41.12,"longitude":-98.97}] |
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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