Calamity
MediumSevere WeatherCalamity Score: 28

Severe Weather in United States

St. HelenaUnited StatesNOAA

Right now

The most recent data we hold from NOAA arrived 1 minute 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 <1 km from here.

This alert expired on 14 September 2026 at 00:47 UTC. It is kept here as a record.

It is the 15th strongest of the 41 detections recorded within 20 km of this point since 9 March 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.

What the source measured

NOAA reported: Severe Thunderstorm Warning issued September 13 at 7:38PM CDT until September 13 at 7:45PM CDT by NWS New Orleans LA

An estimated 20,480 people live within 50 km of this point.

Nearby, since 9 March 2026

How we know

One source: NOAA. Not yet confirmed by a second, independent source.

Our own score for this event is 28 out of 100, at 82 % confidence.

The score is ours, computed from intensity, exposed population and local history — not the source’s.

Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.

Event Data

TypeSevere Weather
SeverityMedium
Calamity Score (ours)28 / 100
Our confidence82%
Coordinates30.9155, -90.6600
Nearest CityHammond (50 km)
Population Exposed20.5K within 50 km
Impact Tiersignificant
Timestamp2026-09-14T00:38:00.000Z
Sourcehttps://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.b91f951b8fac98e0f2c036f51c085fe3efbc637b.001.1

Score Breakdown

35
intensity
40
population
0
cascading
18
historical

Technical Details

EventSevere Thunderstorm Warning
UrgencyImmediate
CertaintyObserved
AreaDescSt. Helena, LA; Tangipahoa, LA; Washington, LA; Amite, MS; Pike, MS
HeadlineSevere Thunderstorm Warning issued September 13 at 7:38PM CDT until September 13 at 7:45PM CDT by NWS New Orleans LA
Expires2026-09-13T19:47:00-05:00
SenderNameNWS New Orleans LA
HasExactCoordstrue

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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