Right now
The most recent data we hold from NOAA arrived 9 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 26 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. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 19 at 5:32PM CDT until June 19 at 6:15PM CDT by NWS Twin Cities/Chanhassen MN
Urban PEI: 249,753 within a heuristic 50 km radius; not unique people.
How we know
11 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 43 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) | 43 / 100 |
| Legacy data-support index | 0.89/1 |
| Coordinates | 45.3701, -92.7129 |
| Nearest City | Forest Lake (24 km) |
| Urban exposure index (PEI) | 249.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-19T22:32:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.8d126e1a56566dbf1d8542fb2fefe48a |
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: 2026-06-19T22:32:00.000Z.
First archived: 2026-06-19T22:38:25.045Z. 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 | Ramsey, MN; Washington, MN; Pierce, WI; St. Croix, WI; Burnett, WI; Chisago, MN; Polk, WI |
| Headline | Severe Thunderstorm Warning issued June 19 at 5:32PM 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 | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.8d126e1a56566dbf1d8542fb2fefe48a2ebfdd66.001.1","noaa_urn:oid:2.49.0.1.840.0.cad45db8d1ad162ef4e2b3642a83f3a619cae9c8.001.1","noaa_urn:oid:2.49.0.1.840.0.02fa3fa2480920b150fdd5b0e1ccbf48f20350a7.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 0.7 |
| Iem Unit | Inch |
| Iem City | 1 NNE Maple Grove |
| Iem County | Hennepin |
| Iem State | MN |
| Iem Wfo | MPX |
| MergedSources | [{"id":"iem_H_45.090_-93.550_1781904960000","source":"iem","severity":"low","severityValue":25,"timestamp":1781904960000,"latitude":45.09,"longitude":-93.55},{"id":"iem_H_45.710_-93.400_1781901000000","source":"iem","severity":"low","severityValue":25,"timestamp":1781901000000,"latitude":45.71,"longitude":-93.4},{"id":"iem_H_45.750_-93.290_1781903820000","source":"iem","severity":"low","severityValue":25,"timestamp":1781903820000,"latitude":45.75,"longitude":-93.29},{"id":"iem_H_45.120_-93.550_1781905320000","source":"iem","severity":"low","severityValue":25,"timestamp":1781905320000,"latitude":45.12,"longitude":-93.55},{"id":"iem_H_45.650_-92.920_1781906760000","source":"iem","severity":"low","severityValue":25,"timestamp":1781906760000,"latitude":45.65,"longitude":-92.92},{"id":"iem_H_45.800_-93.170_1781903700000","source":"iem","severity":"low","severityValue":25,"timestamp":1781903700000,"latitude":45.8,"longitude":-93.17},{"id":"iem_H_45.110_-93.340_1781906640000","source":"iem","severity":"low","severityValue":25,"timestamp":1781906640000,"latitude":45.11,"longitude":-93.34},{"id":"iem_H_45.780_-93.070_1781904300000","source":"iem","severity":"low","severityValue":25,"timestamp":1781904300000,"latitude":45.78,"longitude":-93.07},{"id":"iem_H_45.680_-92.960_1781903700000","source":"iem","severity":"low","severityValue":25,"timestamp":1781903700000,"latitude":45.68,"longitude":-92.96},{"id":"iem_H_45.120_-93.450_1781905800000","source":"iem","severity":"low","severityValue":25,"timestamp":1781905800000,"latitude":45.12,"longitude":-93.45}] |
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.
Review the area, threshold and delivery channel in your account.
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