Wind UNK kt near Nemo, Lawrence, SD. Large outdoor tent structure destroyed. Time estimated based on radar. (UNR)
Geographic Context
This weather event occurred near Rapid City (approximately 25 km away) in United States, an area that experiences a range of natural hazards. An estimated 73.6K people live within 50 km of the event location, placing this in the "significant" population impact tier.
Event Assessment
This event is a weather event classified as medium severity. Calamity.live has classified it as "medium" severity with a severity value of 45. The computed Calamity Score is 32 out of 100, suggesting contained impact at this time. The primary scoring components are: population (55), intensity (35), historical (18). Data for this event was sourced from spc, one of the 250 scientific monitoring sources aggregated by Calamity.live.
Regional Monitoring Context
United States has a documented history of weather events. Monitoring for weather events in the region relies on a combination of ground-based sensors, satellite remote sensing, and official reporting from national agencies. The frequency and severity of such events are tracked over time to support risk assessment and emergency preparedness.
Event Data
| Type | Weather |
| Severity | medium |
| Severity Value | 45 |
| Calamity Score | 32 / 100 |
| Confidence | 81% |
| Coordinates | 44.1900, -103.5000 |
| Nearest City | Rapid City (25 km) |
| Population Exposed | 73.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-30T05:17:42.459Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Score Breakdown
Technical Details
| ReportType | wind |
| Speed | UNK |
| Location | Nemo |
| County | Lawrence |
| State | SD |
| Comments | Large outdoor tent structure destroyed. Time estimated based on radar. (UNR) |
| Iem TypeSummary | G |
| Iem Magnitude | 54 |
| Iem Unit | mph |
| Iem City | 1 WNW Piedmont |
| Iem County | Meade |
| Iem State | SD |
| Iem Wfo | UNR |
| Iem Remark | Measured on a personal weather station on the west side of Piedmont. |
| MergedSources | [{"id":"iem_D_44.190_-103.500_1785369300000","source":"iem","severity":"low","severityValue":25,"timestamp":1785369300000,"latitude":44.19,"longitude":-103.5},{"id":"iem_G_44.240_-103.400_1785370440000","source":"iem","severity":"low","severityValue":25,"timestamp":1785370440000,"latitude":44.24,"longitude":-103.4},{"id":"iem_G_44.440_-103.430_1785370500000","source":"iem","severity":"low","severityValue":25,"timestamp":1785370500000,"latitude":44.44,"longitude":-103.43},{"id":"iem_G_44.240_-103.410_1785369660000","source":"iem","severity":"low","severityValue":25,"timestamp":1785369660000,"latitude":44.24,"longitude":-103.41}] |
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.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Calamity.live data shows a weather event with CalamityScore 32/100, near Rapid City (United States), based on data from spc. Source: Calamity.live, a platform aggregating real-time data from 197 scientific monitoring sources.