Right now
The most recent data we hold from NOAA arrived 6 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 2 July 2026 at 23:48 UTC. It is kept here as a record.
No stronger detection stands among the 36 recorded within 20 km of this point since 15 March 2026 — 3 others scored the same. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued July 2 at 6:38PM CDT until July 2 at 6:45PM CDT by NWS Sioux Falls SD
An estimated 23,657 people live within 50 km of this point.
Nearby, since 15 March 2026
- July 12, 2026 · score 34 · 21.1 km
- July 11, 2026 · score 34 · 21.1 km
- June 8, 2026 · score 34 · 21.7 km
How we know
Confirmed by 10 independent sources, including NOAA.
Our own score for this event is 58 out of 100, at 88 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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 | Critical |
| Calamity Score (ours) | 58 / 100 |
| Our confidence | 88% |
| Coordinates | 44.3326, -97.1214 |
| Nearest City | Brookings (26 km) |
| Population Exposed | 23.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-02T23:38:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tornado Warning_noaa_urn:oid:2.49.0.1.840.0.b60fd1a7996c7cbd898130d108965b26 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Lake, SD; Hamlin, SD |
| Headline | Tornado Warning issued July 2 at 6:38PM CDT until July 2 at 6:45PM CDT by NWS Sioux Falls SD |
| Expires | 2026-07-02T18:48:00-05:00 |
| SenderName | NWS Sioux Falls SD |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.b60fd1a7996c7cbd898130d108965b26740b29c3.001.1","noaa_urn:oid:2.49.0.1.840.0.8099c555c98dd9ffeb27524687a846d62b14a015.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 72 |
| Iem Unit | MPH |
| Iem City | 4 W Erwin |
| Iem County | Kingsbury |
| Iem State | SD |
| Iem Wfo | FSD |
| Iem Remark | Mesonet station DTMS2 De Smet 7N (SD Mesonet). |
| MergedSources | [{"id":"iem_G_44.330_-97.930_1783030260000","source":"iem","severity":"low","severityValue":25,"timestamp":1783030260000,"latitude":44.33,"longitude":-97.93},{"id":"iem_G_44.320_-97.460_1783033260000","source":"iem","severity":"low","severityValue":25,"timestamp":1783033260000,"latitude":44.32,"longitude":-97.46},{"id":"iem_T_44.590_-97.720_1783031400000","source":"iem","severity":"low","severityValue":25,"timestamp":1783031400000,"latitude":44.59,"longitude":-97.72},{"id":"iem_G_44.090_-97.910_1783030200000","source":"iem","severity":"low","severityValue":25,"timestamp":1783030200000,"latitude":44.09,"longitude":-97.91},{"id":"iem_G_44.430_-97.560_1783033200000","source":"iem","severity":"low","severityValue":25,"timestamp":1783033200000,"latitude":44.43,"longitude":-97.56},{"id":"iem_G_44.500_-97.530_1783032780000","source":"iem","severity":"low","severityValue":25,"timestamp":1783032780000,"latitude":44.5,"longitude":-97.53},{"id":"iem_G_44.330_-97.930_1783031340000","source":"iem","severity":"low","severityValue":25,"timestamp":1783031340000,"latitude":44.33,"longitude":-97.93},{"id":"iem_G_44.440_-97.790_1783031460000","source":"iem","severity":"low","severityValue":25,"timestamp":1783031460000,"latitude":44.44,"longitude":-97.79},{"id":"iem_G_44.500_-97.530_1783032360000","source":"iem","severity":"low","severityValue":25,"timestamp":1783032360000,"latitude":44.5,"longitude":-97.53}] |
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 near Brookings?
Calamity.live data shows a weather event with CalamityScore 58/100, near Brookings (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.