Right now
The most recent data we hold from NOAA arrived 18 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
2 other detections within 20 km in the last 24 hours, the nearest 17 km from here.
This alert expired on 28 June 2026 at 02:45 UTC. It is kept here as a record.
It is the 9th strongest of the 122 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 27 at 8:45PM CDT until June 27 at 9:45PM CDT by NWS Bismarck ND
How we know
18 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 22 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) | 22 / 100 |
| Legacy data-support index | 0.69/1 |
| Coordinates | 45.8823, -103.1609 |
| Nearest City | Dickinson (115 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-28T01:45:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.49f460f0b6913ea71a4db7c2b740b98d |
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: 2026-06-28T01:45:00.000Z.
First archived: 2026-06-28T01:48:54.161Z. 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 | Divide, ND; McKenzie, ND; Williams, ND; Billings, ND; Dunn, ND; McKenzie, ND; Stark, ND; Dawson, MT; Richland, MT; Roosevelt, MT; Sheridan, MT; Wibaux, MT and 7 more areas |
| Headline | Severe Thunderstorm Warning issued June 27 at 8:45PM CDT until June 27 at 9:45PM CDT by NWS Bismarck ND |
| Expires | 2026-06-27T21:45:00-05:00 |
| SenderName | NWS Bismarck ND |
| HasExactCoords | true |
| MergedCount | 11 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.49f460f0b6913ea71a4db7c2b740b98d5b1acebe.001.1","noaa_urn:oid:2.49.0.1.840.0.08f7212d9e4ab29356f43da0666f977cc7a54dfe.002.1","noaa_urn:oid:2.49.0.1.840.0.97f748031cc8a0e54066933997a5fe735d48508e.001.1","noaa_urn:oid:2.49.0.1.840.0.f9a76d43e171ee8833baec932265953eb9413f0e.001.1","noaa_urn:oid:2.49.0.1.840.0.6301db8745e595dc91af4604c0a9c2064bfa47fc.001.1","noaa_urn:oid:2.49.0.1.840.0.58581fbf4d0bd468ef2fd7300fff6d8bca85f4da.001.1","noaa_urn:oid:2.49.0.1.840.0.9c04ea3ff729d5248757e7791a8189e4015a5d7c.001.1","noaa_urn:oid:2.49.0.1.840.0.12b2a9557267452c4eaac988e24eb20dbb7ae775.001.1","noaa_urn:oid:2.49.0.1.840.0.2a46db1295550654603339d1cef4f3568ac403fa.001.1","noaa_urn:oid:2.49.0.1.840.0.cacc06845dcc31a40e8cfee116a51383225e051e.001.1","noaa_urn:oid:2.49.0.1.840.0.d2928ca0361f5f472b2a3959bef7903bcf9ad298.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 52 |
| Iem Unit | mph |
| Iem City | 8 WNW Ladner |
| Iem County | Harding |
| Iem State | SD |
| Iem Wfo | UNR |
| Iem Remark | Measured on a personal weather station. |
| MergedSources | [{"id":"iem_G_46.230_-103.710_1782605760000","source":"iem","severity":"low","severityValue":25,"timestamp":1782605760000,"latitude":46.23,"longitude":-103.71},{"id":"iem_G_46.160_-103.300_1782606540000","source":"iem","severity":"low","severityValue":25,"timestamp":1782606540000,"latitude":46.16,"longitude":-103.3},{"id":"iem_G_45.830_-103.720_1782604800000","source":"iem","severity":"low","severityValue":25,"timestamp":1782604800000,"latitude":45.83,"longitude":-103.72},{"id":"iem_G_46.500_-103.310_1782607020000","source":"iem","severity":"low","severityValue":25,"timestamp":1782607020000,"latitude":46.5,"longitude":-103.31},{"id":"iem_G_45.880_-103.380_1782606300000","source":"iem","severity":"low","severityValue":25,"timestamp":1782606300000,"latitude":45.88,"longitude":-103.38},{"id":"iem_H_45.740_-103.880_1782601920000","source":"iem","severity":"low","severityValue":25,"timestamp":1782601920000,"latitude":45.74,"longitude":-103.88},{"id":"iem_G_45.340_-102.920_1782609300000","source":"iem","severity":"low","severityValue":25,"timestamp":1782609300000,"latitude":45.34,"longitude":-102.92},{"id":"iem_G_45.880_-103.380_1782605700000","source":"iem","severity":"low","severityValue":25,"timestamp":1782605700000,"latitude":45.88,"longitude":-103.38},{"id":"iem_H_46.050_-103.890_1782603600000","source":"iem","severity":"low","severityValue":25,"timestamp":1782603600000,"latitude":46.05,"longitude":-103.89},{"id":"iem_G_46.230_-103.700_1782605820000","source":"iem","severity":"low","severityValue":25,"timestamp":1782605820000,"latitude":46.23,"longitude":-103.7},{"id":"iem_H_45.550_-103.350_1782606480000","source":"iem","severity":"low","severityValue":25,"timestamp":1782606480000,"latitude":45.55,"longitude":-103.35},{"id":"iem_H_46.030_-104.080_1782602880000","source":"iem","severity":"low","severityValue":25,"timestamp":1782602880000,"latitude":46.03,"longitude":-104.08},{"id":"iem_H_45.590_-103.670_1782602940000","source":"iem","severity":"low","severityValue":25,"timestamp":1782602940000,"latitude":45.59,"longitude":-103.67},{"id":"iem_G_45.600_-103.550_1782605220000","source":"iem","severity":"low","severityValue":25,"timestamp":1782605220000,"latitude":45.6,"longitude":-103.55},{"id":"iem_G_46.200_-103.470_1782606300000","source":"iem","severity":"low","severityValue":25,"timestamp":1782606300000,"latitude":46.2,"longitude":-103.47},{"id":"iem_G_46.150_-103.810_1782605820000","source":"iem","severity":"low","severityValue":25,"timestamp":1782605820000,"latitude":46.15,"longitude":-103.81},{"id":"iem_G_45.890_-103.880_1782604680000","source":"iem","severity":"low","severityValue":25,"timestamp":1782604680000,"latitude":45.89,"longitude":-103.88}] |
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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