This alert expired on 22 July 2026 at 17:30 UTC. It is kept here as a record.
It is the 3rd strongest of the 21 detections recorded within 20 km of this point since 12 May 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: Tropical Storm Watch issued July 22 at 4:18AM CDT by NWS New Orleans LA
An estimated 128,808 people live within 50 km of this point.
Nearby, since 12 May 2026
- July 21, 2026 · score 39 · 5.3 km
- May 12, 2026 · score 67 · 9.0 km
- July 11, 2026 · score 43 · 18.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 81 % 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) | 43 / 100 |
| Our confidence | 81% |
| Coordinates | 30.0224, -90.8287 |
| Nearest City | Prairieville (34 km) |
| Population Exposed | 128.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-22T09:18:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tropical Storm Watch_noaa_urn:oid:2.49.0.1.840.0.c0343cf3da7a426291c2c8da1d415390 |
Score Breakdown
Technical Details
| Event | Tropical Storm Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Upper Lafourche; Upper Terrebonne; St. John The Baptist and 8 more areas |
| Headline | Tropical Storm Watch issued July 22 at 4:18AM CDT by NWS New Orleans LA |
| Expires | 2026-07-22T12:30:00-05:00 |
| SenderName | NWS New Orleans LA |
| HasExactCoords | true |
| MergedCount | 11 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.c0343cf3da7a426291c2c8da1d415390d2a4d5ca.004.1","noaa_urn:oid:2.49.0.1.840.0.c0343cf3da7a426291c2c8da1d415390d2a4d5ca.002.1","noaa_urn:oid:2.49.0.1.840.0.c0343cf3da7a426291c2c8da1d415390d2a4d5ca.018.1","noaa_urn:oid:2.49.0.1.840.0.c0343cf3da7a426291c2c8da1d415390d2a4d5ca.025.1","noaa_urn:oid:2.49.0.1.840.0.c0343cf3da7a426291c2c8da1d415390d2a4d5ca.023.1","noaa_urn:oid:2.49.0.1.840.0.c0343cf3da7a426291c2c8da1d415390d2a4d5ca.024.1","noaa_urn:oid:2.49.0.1.840.0.62240faac1ab8c9fcea440873724f560c44fd19b.003.1","noaa_urn:oid:2.49.0.1.840.0.62240faac1ab8c9fcea440873724f560c44fd19b.002.1","noaa_urn:oid:2.49.0.1.840.0.62240faac1ab8c9fcea440873724f560c44fd19b.004.1","noaa_urn:oid:2.49.0.1.840.0.62240faac1ab8c9fcea440873724f560c44fd19b.001.1","noaa_urn:oid:2.49.0.1.840.0.b1bae7497dfd2b5c5a5c0f3c1230acb66c94f096.002.1"] |
Safety Information
During a tropical cyclone: shelter in a sturdy interior room away from windows. Stock emergency supplies including water, food, medications, and flashlights. Do not venture outdoors during the eye of the storm. After passage, beware of downed power lines, flooding, and structural damage. Follow official guidance for evacuation and shelter.
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 near Prairieville?
Calamity.live data shows a weather event with CalamityScore 43/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 187 scientific monitoring sources.