This alert expired on 4 July 2026 at 21:15 UTC. It is kept here as a record.
It is the 6th strongest of the 46 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 4 at 3:40PM CDT until July 4 at 4:15PM CDT by NWS St Louis MO
Nearby, since 15 March 2026
- March 16, 2026 · score 22 · 18.5 km
- August 6, 2026 · score 43 · 24.1 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 63 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 22 / 100 |
| Our confidence | 63% |
| Coordinates | 38.0983, -91.0125 |
| Nearest City | Wildwood (62 km) |
| Impact Tier | minor |
| Timestamp | 2026-07-04T20:40:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.923011d1474e449512a2ac45823a1ae5 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Crawford, MO; Washington, MO; Dent, MO; Phelps, MO; Texas, MO; Franklin, MO; Washington, MO and 1 more areas |
| Headline | Severe Thunderstorm Warning issued July 4 at 3:40PM CDT until July 4 at 4:15PM CDT by NWS St Louis MO |
| Expires | 2026-07-04T16:15:00-05:00 |
| SenderName | NWS St Louis MO |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.923011d1474e449512a2ac45823a1ae5ce85e7b6.001.1","noaa_urn:oid:2.49.0.1.840.0.ab9081d8eec0524d0d3b8e7f9b00083fba9e78cf.002.1","noaa_urn:oid:2.49.0.1.840.0.d3809be582cf02d6cce2a92ac94462e3505e335d.002.1","noaa_urn:oid:2.49.0.1.840.0.0bf2265e535369399690ed59c6176d03f352e31d.001.1"] |
| Iem TypeSummary | D |
| Iem City | Rolla |
| Iem County | Phelps |
| Iem State | MO |
| Iem Wfo | SGF |
| Iem Remark | Wind caused damage in Rolla. Branches down on Bishop Street, power lines affected. Lightning caused structure fire in town. Time based on radar. |
| MergedSources | [{"id":"iem_D_37.950_-91.780_1783195200000","source":"iem","severity":"low","severityValue":25,"timestamp":1783195200000,"latitude":37.95,"longitude":-91.78}] |
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 10 February 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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.