This alert expired on 21 June 2026 at 01:00 UTC. It is kept here as a record.
It is the 4th strongest of the 90 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 16 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 20 at 7:12PM CDT until June 20 at 8:00PM CDT by NWS Hastings NE
An estimated 109,385 people live within 50 km of this point.
Nearby, since 15 March 2026
- June 20, 2026 · score 43 · 18.2 km
How we know
Confirmed by 19 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 89 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 89% |
| Coordinates | 40.9127, -98.5577 |
| Nearest City | Grand Island (18 km) |
| Population Exposed | 109.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-21T00:12:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Adams, NE; Buffalo, NE; Hall, NE; Hamilton, NE; Howard, NE; Buffalo, NE; Hall, NE; Howard, NE |
| Headline | Severe Thunderstorm Warning issued June 20 at 7:12PM CDT until June 20 at 8:00PM CDT by NWS Hastings NE |
| Expires | 2026-06-20T20:00:00-05:00 |
| SenderName | NWS Hastings NE |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.6750b54138386619e2bfd3919c3eb6d91d98bd24.001.1","noaa_urn:oid:2.49.0.1.840.0.af03f651f42d648a3ba75e1d4dcfc1a77ad49a6e.002.1"] |
| 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_R_40.420_-98.050_1781983740000","source":"iem","severity":"low","severityValue":25,"timestamp":1781983740000,"latitude":40.42,"longitude":-98.05},{"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_R_40.460_-98.090_1781983500000","source":"iem","severity":"low","severityValue":25,"timestamp":1781983500000,"latitude":40.46,"longitude":-98.09},{"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_40.440_-98.070_1781983620000","source":"iem","severity":"low","severityValue":25,"timestamp":1781983620000,"latitude":40.44,"longitude":-98.07},{"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 10 February 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.
Calamity.live data shows a weather event with CalamityScore 43/100, near Grand Island (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.