This alert expired on 5 July 2026 at 00:00 UTC. It is kept here as a record.
It is the 2nd strongest of the 154 detections recorded within 20 km of this point since 17 March 2026. The last comparable one was on 22 June 2026. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 4 at 7:03PM EDT until July 4 at 8:00PM EDT by NWS Baltimore MD/Washington DC
An estimated 216,744 people live within 50 km of this point.
Nearby, since 17 March 2026
- August 28, 2026 · score 67 · 4.8 km
- March 17, 2026 · score 43 · 5.7 km
- June 15, 2026 · score 43 · 12.9 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 77 % 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 | 77% |
| Coordinates | 40.1198, -76.2235 |
| Nearest City | Lancaster (12 km) |
| Population Exposed | 216.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-04T23:03:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Anne Arundel, MD; Baltimore, MD; Howard, MD; Baltimore City, MD; Calvert, MD; Charles, MD; Prince Georges, MD; St. Marys, MD; Baltimore, MD; Carroll, MD; Howard, MD; Montgomery, MD and 21 more areas |
| Headline | Severe Thunderstorm Warning issued July 4 at 7:03PM EDT until July 4 at 8:00PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-07-04T20:00:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 24 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.4b88ae320fcce95c5cecfaf52de676dee5bb795a.001.1","noaa_urn:oid:2.49.0.1.840.0.d2aa155eae04612e1827371281edbe6aaccfdef5.001.1","noaa_urn:oid:2.49.0.1.840.0.dea2634c5e7a303144de179aa4fa2c4490f40c0c.001.1","noaa_urn:oid:2.49.0.1.840.0.6e8fc0f754c61c136b22b8173a678be74ca6a1e9.001.1","noaa_urn:oid:2.49.0.1.840.0.79289cc46fc29e0a354e57d144c919c2dacdc8b9.001.1","noaa_urn:oid:2.49.0.1.840.0.1aee4af03e096062062474ec569ee8fc1c8819e7.002.1","noaa_urn:oid:2.49.0.1.840.0.387cec28806225e508b302c302aea1ae5bb715fa.001.1","noaa_urn:oid:2.49.0.1.840.0.d46ab000e827c8b3518eb05b98a7e14ae69ec134.001.1","noaa_urn:oid:2.49.0.1.840.0.8fddeb9116067e650553fde6c70ee084f54605de.001.1","noaa_urn:oid:2.49.0.1.840.0.ac1e2141d184c3c1d1bc9179b55c0ae8866c5045.001.1","noaa_urn:oid:2.49.0.1.840.0.f45f276329f77333a63db1cba37bfea8f30cb702.001.1","noaa_urn:oid:2.49.0.1.840.0.b023052f9a27a82a96192406d4beafdb908d31bb.001.1","noaa_urn:oid:2.49.0.1.840.0.59174c1f5b4af89517566d3da0282e42a23f70a4.001.1","noaa_urn:oid:2.49.0.1.840.0.c8affde78f3106d4c1e0f98f608447f61c27c77c.001.1","noaa_urn:oid:2.49.0.1.840.0.d2de090d9852e3c0d237a3855e5a3a1c28bb8b78.002.1","noaa_urn:oid:2.49.0.1.840.0.5bb1be395b72ef7b8836502a55d9742874b63f42.001.1","noaa_urn:oid:2.49.0.1.840.0.dc0306bec74bf63dffad1f27ddbcb7edc6055824.001.1","noaa_urn:oid:2.49.0.1.840.0.6e10c851f5e554888bc57f4255b96992d1919a38.001.1","noaa_urn:oid:2.49.0.1.840.0.a87ddab614371e8e0cb6291c62ab53cfb2245cba.001.1","noaa_urn:oid:2.49.0.1.840.0.bc56a8eb233ccb3f04776b68c79cee592ac04783.001.1","noaa_urn:oid:2.49.0.1.840.0.ec681db4cdeecc21f249f4c14d14bc514f62674e.001.1","noaa_urn:oid:2.49.0.1.840.0.ecbcd16cfa2c3be945501bf1df2a872d799bae97.001.1","noaa_urn:oid:2.49.0.1.840.0.eae0c56c2c5f555a33fe748368f8e969c76b745f.001.1","noaa_urn:oid:2.49.0.1.840.0.433b19a4a1ce5e258544626e1950d97079ebd9e8.001.1"] |
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 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.
Calamity.live data shows a weather event with CalamityScore 43/100, near Lancaster (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.