Right now
The most recent data we hold from NOAA arrived 40 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 21 July 2026 at 17:15 UTC. It is kept here as a record.
It is the 28th strongest of the 34 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tropical Storm Watch issued July 20 at 10:02PM CDT by NWS New Orleans LA
Urban PEI: 222,013 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- July 21, 2026 · score 43 · 1.9 km
- June 20, 2026 · score 43 · 10.4 km
- July 20, 2026 · score 37 · 10.8 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 37 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) | 37 / 100 |
| Legacy data-support index | 0.80/1 |
| Coordinates | 30.1060, -89.1982 |
| Nearest City | Long Beach (28 km) |
| Urban exposure index (PEI) | 222.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-21T03:02:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tropical Storm Watch_noaa_urn:oid:2.49.0.1.840.0.cbf5978b50d664d0887b7c48f08ec3ce |
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: 2026-07-21T03:02:00.000Z.
First archived: 2026-07-21T03:09:38.694Z. 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 | Tropical Storm Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Lake Maurepas; Lake Pontchartrain; Lake Salvador and Lake Cataouatche; Terrebonne Bay; Barataria Bay; Coastal Waters from Port Fourchon LA to Lower Atchafalaya River LA out 20 nm; Coastal waters from the Southwest Pass of the Mississippi River to Port Fourchon Louisiana out 20 NM; Coastal waters from Port Fourchon Louisiana to Lower Atchafalaya River LA from 20 to 60 NM; Coastal waters from Southwest Pass of the Mississippi River to Port Fourchon Louisiana from 20 to 60 NM; Upper St. Charles; Upper Lafourche and 25 more areas |
| Headline | Tropical Storm Watch issued July 20 at 10:02PM CDT by NWS New Orleans LA |
| Expires | 2026-07-21T12:15:00-05:00 |
| SenderName | NWS New Orleans LA |
| HasExactCoords | false |
| MergedCount | 28 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.cbf5978b50d664d0887b7c48f08ec3cecce8709e.002.1","noaa_urn:oid:2.49.0.1.840.0.f3c8aee78d9440af01d98891627337954e7e411c.017.1","noaa_urn:oid:2.49.0.1.840.0.f3c8aee78d9440af01d98891627337954e7e411c.004.1","noaa_urn:oid:2.49.0.1.840.0.f3c8aee78d9440af01d98891627337954e7e411c.010.1","noaa_urn:oid:2.49.0.1.840.0.f3c8aee78d9440af01d98891627337954e7e411c.007.1","noaa_urn:oid:2.49.0.1.840.0.f3c8aee78d9440af01d98891627337954e7e411c.003.1","noaa_urn:oid:2.49.0.1.840.0.f3c8aee78d9440af01d98891627337954e7e411c.002.1","noaa_urn:oid:2.49.0.1.840.0.f3c8aee78d9440af01d98891627337954e7e411c.005.1","noaa_urn:oid:2.49.0.1.840.0.f3c8aee78d9440af01d98891627337954e7e411c.024.1","noaa_urn:oid:2.49.0.1.840.0.f3c8aee78d9440af01d98891627337954e7e411c.018.1","noaa_urn:oid:2.49.0.1.840.0.f3c8aee78d9440af01d98891627337954e7e411c.025.1","noaa_urn:oid:2.49.0.1.840.0.f3c8aee78d9440af01d98891627337954e7e411c.015.1","noaa_urn:oid:2.49.0.1.840.0.f3c8aee78d9440af01d98891627337954e7e411c.006.1","noaa_urn:oid:2.49.0.1.840.0.f3c8aee78d9440af01d98891627337954e7e411c.009.1","noaa_urn:oid:2.49.0.1.840.0.f3c8aee78d9440af01d98891627337954e7e411c.014.1","noaa_urn:oid:2.49.0.1.840.0.f3c8aee78d9440af01d98891627337954e7e411c.016.1","noaa_urn:oid:2.49.0.1.840.0.f3c8aee78d9440af01d98891627337954e7e411c.001.1","noaa_urn:oid:2.49.0.1.840.0.f3c8aee78d9440af01d98891627337954e7e411c.012.1","noaa_urn:oid:2.49.0.1.840.0.a63525c0d2dc6250111e0c0660137f61996a2eba.006.1","noaa_urn:oid:2.49.0.1.840.0.a63525c0d2dc6250111e0c0660137f61996a2eba.001.2","noaa_urn:oid:2.49.0.1.840.0.a63525c0d2dc6250111e0c0660137f61996a2eba.005.1","noaa_urn:oid:2.49.0.1.840.0.a63525c0d2dc6250111e0c0660137f61996a2eba.004.1","noaa_urn:oid:2.49.0.1.840.0.a63525c0d2dc6250111e0c0660137f61996a2eba.002.2","noaa_urn:oid:2.49.0.1.840.0.a63525c0d2dc6250111e0c0660137f61996a2eba.003.1","noaa_urn:oid:2.49.0.1.840.0.6096d19addf133d6fe1765f298990ca1565d5d1e.001.1","noaa_urn:oid:2.49.0.1.840.0.6096d19addf133d6fe1765f298990ca1565d5d1e.002.1","noaa_urn:oid:2.49.0.1.840.0.f3c8aee78d9440af01d98891627337954e7e411c.023.1","noaa_urn:oid:2.49.0.1.840.0.a63525c0d2dc6250111e0c0660137f61996a2eba.007.1"] |
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 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.
Want to know when something happens near Long Beach?