Right now
The most recent data we hold from NOAA arrived 29 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 23 May 2026 at 02:15 UTC. It is kept here as a record.
It is the 5th strongest of the 37 detections recorded within 20 km of this point since 15 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 May 22 at 8:13PM CDT until May 22 at 9:15PM CDT by NWS Shreveport LA
Urban PEI: 106,107 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- March 15, 2026 · score 67 · 10.0 km
- March 16, 2026 · score 43 · 23.6 km
How we know
2 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 | 0.84/1 |
| Coordinates | 32.3892, -94.5142 |
| Nearest City | Marshall (22 km) |
| Urban exposure index (PEI) | 106.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-23T01:13:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.c4ea84425346c670176bca99431d5ef6 |
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: 2026-05-23T01:13:00.000Z.
First archived: 2026-05-23T01:21:21.944Z. 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 | Harrison, TX; Panola, TX; Gregg, TX; Harrison, TX; Panola, TX; Rusk, TX |
| Headline | Severe Thunderstorm Warning issued May 22 at 8:13PM CDT until May 22 at 9:15PM CDT by NWS Shreveport LA |
| Expires | 2026-05-22T21:15:00-05:00 |
| SenderName | NWS Shreveport LA |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.c4ea84425346c670176bca99431d5ef63b521023.001.1","noaa_urn:oid:2.49.0.1.840.0.26e966844f41c42fed71df48b73dc05b63d74775.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | 5 SSW Tatum |
| Iem County | Panola |
| Iem State | TX |
| Iem Wfo | SHV |
| Iem Remark | Quarter size hail reported near Martin Lake. |
| MergedSources | [{"id":"iem_H_32.250_-94.550_1779495300000","source":"iem","severity":"low","severityValue":25,"timestamp":1779495300000,"latitude":32.25,"longitude":-94.55}] |
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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