Right now
The most recent data we hold from NOAA arrived 4 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 6 August 2026 at 20:45 UTC. It is kept here as a record.
It is the 23rd strongest of the 81 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 6 at 3:21PM CDT until August 6 at 3:45PM CDT by NWS Springfield MO
Urban PEI: 226,297 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- June 14, 2026 · score 43 · 7.9 km
- June 25, 2026 · score 43 · 8.5 km
- March 15, 2026 · score 43 · 11.6 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 37 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) | 37 / 100 |
| Legacy data-support index | 0.86/1 |
| Coordinates | 37.4008, -93.2370 |
| Nearest City | Springfield (21 km) |
| Urban exposure index (PEI) | 226.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-06T20:21:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.5655b6e24723b85959b38e9c7b3a3116 |
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: 2026-08-06T20:21:00.000Z.
First archived: 2026-08-06T20:25:36.100Z. 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 | Dallas, MO; Greene, MO; Polk, MO; Webster, MO; Greene, MO; Lawrence, MO; Dallas, MO; Laclede, MO; Webster, MO |
| Headline | Severe Thunderstorm Warning issued August 6 at 3:21PM CDT until August 6 at 3:45PM CDT by NWS Springfield MO |
| Expires | 2026-08-06T15:45:00-05:00 |
| SenderName | NWS Springfield MO |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.5655b6e24723b85959b38e9c7b3a31169f5a4efc.001.1","noaa_urn:oid:2.49.0.1.840.0.996ab871a2d3e0785b33a3298c32d3dbeae28fc0.001.1","noaa_urn:oid:2.49.0.1.840.0.4d79705a34f00297108e69b9a2419d0dbb37abd0.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1.25 |
| Iem Unit | Inch |
| Iem City | 1 S Pleasant Hope |
| Iem County | Polk |
| Iem State | MO |
| Iem Wfo | SGF |
| Iem Remark | Hail from quarters to half dollars in size was reported. |
| MergedSources | [{"id":"iem_H_37.460_-93.270_1786045560000","source":"iem","severity":"low","severityValue":25,"timestamp":1786045560000,"latitude":37.46,"longitude":-93.27}] |
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.
Want to know when something happens near Springfield?