Calamity
MediumSevere WeatherCalamity Score: 34

Severe Weather in United States

ForrestUnited StatesNOAA

Right now

The most recent data we hold from NOAA arrived 15 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 27 May 2026 at 17:00 UTC. It is kept here as a record.

It is the 9th strongest of the 81 detections recorded within 20 km of this point since 7 May 2026. The last comparable one was on 26 May 2026. 8 more were recorded here in the fortnight before it.

What the source measured

NOAA reported: Flood Warning issued May 26 at 7:51PM CDT until May 29 at 5:40PM CDT by NWS New Orleans LA

An estimated 46,805 people live within 50 km of this point.

Nearby, since 7 May 2026

How we know

Confirmed by 2 independent sources, including NOAA.

Our own score for this event is 34 out of 100, at 86 % confidence.

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

Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.

Event Data

TypeSevere Weather
SeverityMedium
Calamity Score (ours)34 / 100
Our confidence86%
Coordinates31.0568, -89.1535
Nearest CityHattiesburg (33 km)
Population Exposed46.8K within 50 km
Impact Tiersignificant
Timestamp2026-05-27T00:51:00.000Z
Sourcehttps://api.weather.gov/alerts/merged_Flood Warning_noaa_urn:oid:2.49.0.1.840.0.d1f844d4a54db608f9deddac85a2f8cb

Score Breakdown

35
intensity
40
population
0
cascading
80
historical

Technical Details

EventFlood Warning
UrgencyImmediate
CertaintyObserved
AreaDescHarrison, MS; St. Tammany, LA; Hancock, MS; Pearl River, MS; Pearl River, MS and 6 more areas
HeadlineFlood Warning issued May 26 at 7:51PM CDT until May 29 at 5:40PM CDT by NWS New Orleans LA
Expires2026-05-27T12:00:00-05:00
SenderNameNWS New Orleans LA
HasExactCoordstrue
MergedCount11
MergedIds["noaa_urn:oid:2.49.0.1.840.0.d1f844d4a54db608f9deddac85a2f8cbbf1ff5d4.001.1","noaa_urn:oid:2.49.0.1.840.0.a5250f7781fcbe40a1e0596b3e27d39c84046d64.001.1","noaa_urn:oid:2.49.0.1.840.0.b9eb7568986f40f857ff01e8b7dc35b66ffba24c.001.1","noaa_urn:oid:2.49.0.1.840.0.d833fdfc961a815045f4d73f5e3e0490b3e59d47.001.1","noaa_urn:oid:2.49.0.1.840.0.a786189bb6b325439e1f6467ac8b0f55e5e7833a.001.1","noaa_urn:oid:2.49.0.1.840.0.4bc805ef7a1f785201592cf8d3bf62f4b79e8a77.001.1","noaa_urn:oid:2.49.0.1.840.0.364694dd0abe1b786202a51c4fb2b63ddad80858.001.1","noaa_urn:oid:2.49.0.1.840.0.364694dd0abe1b786202a51c4fb2b63ddad80858.002.1","noaa_urn:oid:2.49.0.1.840.0.0171a8de1a6bf84270efe33b3d0f8a331b1f5942.003.1","noaa_urn:oid:2.49.0.1.840.0.0171a8de1a6bf84270efe33b3d0f8a331b1f5942.001.1","noaa_urn:oid:2.49.0.1.840.0.cc5883c35f450e3c255aa3a5b722f87774e7e646.001.1"]
Iem TypeSummaryH
Iem Magnitude0.75
Iem UnitInch
Iem City3 SSE Calhoun
Iem CountyJones
Iem StateMS
Iem WfoJAN
Iem RemarkDime to penny sized hail.
MergedSources[{"id":"iem_H_31.660_-89.190_1779823920000","source":"iem","severity":"low","severityValue":25,"timestamp":1779823920000,"latitude":31.66,"longitude":-89.19}]

Safety Information

During flooding: never walk, swim, or drive through floodwaters. Six inches of moving water can knock you down, and one foot of water can sweep away a vehicle. Move to higher ground if waters rise. After flooding, avoid contact with floodwater which may contain sewage, chemicals, or debris. Follow local emergency service guidance.

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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Calamity.live data shows a weather event with CalamityScore 34/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.