Right now
The most recent data we hold from NOAA arrived 5 minutes ago, and this point is in it.
3 other detections within 20 km in the last 24 hours, the nearest 12 km from here.
This alert is in force until 8 September 2026, 01:15 UTC.
It is the strongest of the 316 detections recorded within 20 km of this point since 17 May 2026. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Tornado Warning issued September 7 at 7:51PM CDT until September 7 at 8:15PM CDT by NWS Sioux Falls SD
Nearby, since 17 May 2026
- September 1, 2026 · score 28 · 10.3 km
- September 8, 2026 · score 28 · 12.1 km
- September 7, 2026 · score 28 · 12.1 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 46 out of 100, at 65 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Critical |
| Calamity Score (ours) | 46 / 100 |
| Our confidence | 65% |
| Coordinates | 42.9641, -98.5099 |
| Nearest City | Mitchell (92 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-08T00:51:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.1a97c909dce9b0f2f9f6578b2c726b96a8507cbf.002.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Charles Mix, SD; Boyd, NE |
| Headline | Tornado Warning issued September 7 at 7:51PM CDT until September 7 at 8:15PM CDT by NWS Sioux Falls SD |
| Expires | 2026-09-07T20:15:00-05:00 |
| SenderName | NWS Sioux Falls SD |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.1a97c909dce9b0f2f9f6578b2c726b96a8507cbf.002.1","noaa_urn:oid:2.49.0.1.840.0.69ed13f8e65953c78aeadff19e0f9aeb47820f0a.001.1"] |
| Spc ReportType | hail |
| Spc Speed | 125 |
| Spc Location | 2 N Lake Andes |
| Spc County | Charles Mix |
| Spc State | SD |
| Spc Comments | (FSD) |
| MergedSources | [{"id":"spc_tornado_42.90_-98.63_1","source":"spc","severity":"high","severityValue":78,"timestamp":1788827700000,"latitude":42.9,"longitude":-98.63},{"id":"spc_wind_42.93_-98.97_11","source":"spc","severity":"medium","severityValue":45,"timestamp":1788828687907,"latitude":42.93,"longitude":-98.97},{"id":"spc_wind_42.93_-98.97_12","source":"spc","severity":"medium","severityValue":45,"timestamp":1788828687907,"latitude":42.93,"longitude":-98.97},{"id":"spc_wind_42.92_-98.82_15","source":"spc","severity":"medium","severityValue":45,"timestamp":1788828687907,"latitude":42.92,"longitude":-98.82},{"id":"spc_wind_42.93_-98.63_16","source":"spc","severity":"medium","severityValue":45,"timestamp":1788825600000,"latitude":42.93,"longitude":-98.63},{"id":"spc_hail_42.87_-98.95_18","source":"spc","severity":"high","severityValue":65,"timestamp":1788828687907,"latitude":42.87,"longitude":-98.95},{"id":"spc_hail_43.19_-98.54_19","source":"spc","severity":"high","severityValue":65,"timestamp":1788828687907,"latitude":43.19,"longitude":-98.54}] |
Safety Information
If a tornado warning is issued: go to a basement or an interior room on the lowest floor, away from windows. A vehicle and a mobile home are not shelter. Cover your head and neck. Wait for the official all-clear before going outside, and watch for downed power lines and gas leaks afterwards.
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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 46/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.