Right now
The most recent data we hold from NOAA arrived 12 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 19 June 2026 at 23:15 UTC. It is kept here as a record.
No stronger detection stands among the 14 recorded within 20 km of this point since 15 March 2026 — 5 others scored the same. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 19 at 6:03PM CDT until June 19 at 6:15PM CDT by NWS Twin Cities/Chanhassen MN
Urban PEI: 50,498 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- June 19, 2026 · score 39 · 4.7 km
- June 19, 2026 · score 39 · 14.1 km
How we know
10 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 | 45.1005, -92.3039 |
| Nearest City | River Falls (37 km) |
| Urban exposure index (PEI) | 50.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-19T23:03:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.657149dac20bc2516e674bbb5fc58e8b |
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: 2026-06-19T23:03:00.000Z.
First archived: 2026-06-19T23:09:32.837Z. 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 | Washington, MN; Pierce, WI; St. Croix, WI; Polk, WI; Chisago, MN; Polk, WI and 1 more areas |
| Headline | Severe Thunderstorm Warning issued June 19 at 6:03PM CDT until June 19 at 6:15PM CDT by NWS Twin Cities/Chanhassen MN |
| Expires | 2026-06-19T18:15:00-05:00 |
| SenderName | NWS Twin Cities/Chanhassen MN |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.657149dac20bc2516e674bbb5fc58e8b6ec3e623.001.1","noaa_urn:oid:2.49.0.1.840.0.f9f53a2d435b01565bcf887ab86025fb39bfb428.002.1","noaa_urn:oid:2.49.0.1.840.0.35786560a48a73514b12f94d6082380944651742.001.1","noaa_urn:oid:2.49.0.1.840.0.76c6cbeec17ad2706e59d403657e009742298ace.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1.25 |
| Iem Unit | Inch |
| Iem City | 1 SSE Roseville |
| Iem County | Ramsey |
| Iem State | MN |
| Iem Wfo | MPX |
| Iem Remark | A lot of hail falling in Roseville up to half dollar sized. The ground is fully covered with hail. |
| MergedSources | [{"id":"iem_H_45.020_-93.150_1781907780000","source":"iem","severity":"low","severityValue":25,"timestamp":1781907780000,"latitude":45.02,"longitude":-93.15},{"id":"iem_H_45.570_-92.650_1781907660000","source":"iem","severity":"low","severityValue":25,"timestamp":1781907660000,"latitude":45.57,"longitude":-92.65},{"id":"iem_H_45.010_-93.090_1781908320000","source":"iem","severity":"low","severityValue":25,"timestamp":1781908320000,"latitude":45.01,"longitude":-93.09},{"id":"iem_H_45.030_-93.210_1781907780000","source":"iem","severity":"low","severityValue":25,"timestamp":1781907780000,"latitude":45.03,"longitude":-93.21},{"id":"iem_H_45.070_-93.240_1781907180000","source":"iem","severity":"low","severityValue":25,"timestamp":1781907180000,"latitude":45.07,"longitude":-93.24},{"id":"iem_H_44.990_-93.050_1781909040000","source":"iem","severity":"low","severityValue":25,"timestamp":1781909040000,"latitude":44.99,"longitude":-93.05},{"id":"iem_H_45.690_-92.590_1781908200000","source":"iem","severity":"low","severityValue":25,"timestamp":1781908200000,"latitude":45.69,"longitude":-92.59},{"id":"iem_H_45.000_-93.200_1781908200000","source":"iem","severity":"low","severityValue":25,"timestamp":1781908200000,"latitude":45,"longitude":-93.2},{"id":"iem_H_45.000_-93.150_1781908080000","source":"iem","severity":"low","severityValue":25,"timestamp":1781908080000,"latitude":45,"longitude":-93.15}] |
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.
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