Right now
The most recent data we hold from NOAA arrived 3 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 22 May 2026 at 01:00 UTC. It is kept here as a record.
It is the 7th strongest of the 63 detections recorded within 20 km of this point since 6 May 2026. Another comparable one was recorded here earlier the same day. 18 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 21 at 6:30PM MDT until May 21 at 7:00PM MDT by NWS Denver CO
Nearby, since 6 May 2026
- May 21, 2026 · score 46 · 8.4 km
- July 9, 2026 · score 22 · 19.3 km
How we know
10 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 | 39.5813, -103.0747 |
| Nearest City | Parker (145 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-05-22T00:30:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.31b5060cce29259ee6b4485f3345cc4e |
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: 2026-05-22T00:30:00.000Z.
First archived: 2026-05-22T00:40:57.512Z. 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, CO; Kit Carson, CO |
| Headline | Severe Thunderstorm Warning issued May 21 at 6:30PM MDT until May 21 at 7:00PM MDT by NWS Denver CO |
| Expires | 2026-05-21T19:00:00-06:00 |
| SenderName | NWS Denver CO |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.31b5060cce29259ee6b4485f3345cc4eb3e0ad59.001.1","noaa_urn:oid:2.49.0.1.840.0.9118755ab2377c071311e1591f7bca8ea6191808.001.1","noaa_urn:oid:2.49.0.1.840.0.209fa1c06a6eb0ae68bea4727fc5290094101d1b.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1.75 |
| Iem Unit | Inch |
| Iem City | 7 S Last Chance |
| Iem County | Washington |
| Iem State | CO |
| Iem Wfo | BOU |
| Iem Remark | Report from mPING: Golf Ball (1.75 in.). |
| MergedSources | [{"id":"iem_H_39.610_-103.240_1779407040000","source":"iem","severity":"low","severityValue":25,"timestamp":1779407040000,"latitude":39.61,"longitude":-103.24},{"id":"iem_H_39.580_-103.220_1779407220000","source":"iem","severity":"low","severityValue":25,"timestamp":1779407220000,"latitude":39.58,"longitude":-103.22},{"id":"iem_T_39.610_-103.270_1779406500000","source":"iem","severity":"low","severityValue":25,"timestamp":1779406500000,"latitude":39.61,"longitude":-103.27},{"id":"iem_H_39.530_-103.080_1779408420000","source":"iem","severity":"low","severityValue":25,"timestamp":1779408420000,"latitude":39.53,"longitude":-103.08},{"id":"iem_H_39.640_-103.410_1779405540000","source":"iem","severity":"low","severityValue":25,"timestamp":1779405540000,"latitude":39.64,"longitude":-103.41},{"id":"iem_H_39.670_-103.530_1779404760000","source":"iem","severity":"low","severityValue":25,"timestamp":1779404760000,"latitude":39.67,"longitude":-103.53},{"id":"iem_H_39.650_-103.590_1779403800000","source":"iem","severity":"low","severityValue":25,"timestamp":1779403800000,"latitude":39.65,"longitude":-103.59},{"id":"iem_H_39.460_-102.880_1779406260000","source":"iem","severity":"low","severityValue":25,"timestamp":1779406260000,"latitude":39.46,"longitude":-102.88},{"id":"iem_H_39.620_-103.590_1779404280000","source":"iem","severity":"low","severityValue":25,"timestamp":1779404280000,"latitude":39.62,"longitude":-103.59}] |
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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