Right now
The most recent data we hold from NOAA arrived 5 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 6 July 2026 at 01:45 UTC. It is kept here as a record.
No stronger detection stands among the 68 recorded within 20 km of this point since 16 March 2026 — 24 others scored the same. Another comparable one was recorded here earlier the same day. 13 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 5 at 9:15PM EDT until July 5 at 9:45PM EDT by NWS Baltimore MD/Washington DC
Urban PEI: 2,002,145 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- July 5, 2026 · score 52 · 4.3 km
- September 3, 2026 · score 46 · 5.4 km
- September 2, 2026 · score 46 · 5.4 km
How we know
3 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 52 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) | 52 / 100 |
| Legacy data-support index | 0.90/1 |
| Coordinates | 39.5853, -76.6326 |
| Nearest City | Hunt Valley (10 km) |
| Urban exposure index (PEI) | 2.0M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-06T01:15:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.c9aca735ab77b52eb230facb8ef5b9db |
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: 2026-07-06T01:15:00.000Z.
First archived: 2026-07-06T01:17:05.229Z. 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 | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Anne Arundel, MD; Baltimore, MD; Adams, PA; Cumberland, PA; Page, VA; Rockingham, VA and 6 more areas |
| Headline | Severe Thunderstorm Warning issued July 5 at 9:15PM EDT until July 5 at 9:45PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-07-05T21:45:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 9 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.c9aca735ab77b52eb230facb8ef5b9db4ca14f40.001.1","noaa_urn:oid:2.49.0.1.840.0.b4138a540a43d7f551fb55fccc72f65f7716181b.002.1","noaa_urn:oid:2.49.0.1.840.0.b3eaab5dadf09657846b4ad4e07b3bd3501e590d.002.1","noaa_urn:oid:2.49.0.1.840.0.f55a28c671ef1f6dcf68682cb6c27526087282c9.001.1","noaa_urn:oid:2.49.0.1.840.0.c4dc96765dd1d561f108371a0510cb2bd7669f6f.001.1","noaa_urn:oid:2.49.0.1.840.0.dbecf6b27cb399e3129335784b63c546f29edead.001.1","noaa_urn:oid:2.49.0.1.840.0.23dcbf17771e0b08ae5a308907d4f999a0af87f0.001.1","noaa_urn:oid:2.49.0.1.840.0.c01448805c018f09165a0a5cecb088a8bda4ce55.002.1","noaa_urn:oid:2.49.0.1.840.0.0aadaaa88df0ee675ff6ff4212d3e11d80a0822d.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 0.75 |
| Iem Unit | inch |
| Iem City | Hampstead |
| Iem County | Carroll |
| Iem State | MD |
| Iem Wfo | LWX |
| MergedSources | [{"id":"iem_H_39.530_-76.930_1783292820000","source":"iem","severity":"low","severityValue":25,"timestamp":1783292820000,"latitude":39.53,"longitude":-76.93},{"id":"iem_H_39.620_-76.860_1783294080000","source":"iem","severity":"low","severityValue":25,"timestamp":1783294080000,"latitude":39.62,"longitude":-76.86}] |
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.
Review the area, threshold and delivery channel in your account.
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