Right now
The most recent data we hold from NOAA arrived 1 minute 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 5 July 2026 at 23:45 UTC. It is kept here as a record.
It is the 5th strongest of the 125 detections recorded within 20 km of this point since 12 March 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: Severe Thunderstorm Warning issued July 5 at 7:16PM EDT until July 5 at 7:45PM EDT by NWS Baltimore MD/Washington DC
Urban PEI: 2,575,669 within a heuristic 50 km radius; not unique people.
Nearby, since 12 March 2026
- September 3, 2026 · score 46 · 0.1 km
- September 2, 2026 · score 46 · 0.1 km
- July 5, 2026 · score 52 · 0.4 km
How we know
2 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 | 0.82/1 |
| Coordinates | 39.4001, -76.6885 |
| Nearest City | Pikesville (4 km) |
| Urban exposure index (PEI) | 2.6M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-05T23:16:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.e51ee07e2962d54e751ed0c00184cedb |
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: 2026-07-05T23:16:00.000Z.
First archived: 2026-07-05T23:20:27.372Z. 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 | Howard, MD; Montgomery, MD; Kent, DE; Caroline, MD; Queen Anne's, MD; Caroline, VA; Essex, VA and 4 more areas |
| Headline | Severe Thunderstorm Warning issued July 5 at 7:16PM EDT until July 5 at 7:45PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-07-05T19:45:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.e51ee07e2962d54e751ed0c00184cedbabfdd788.001.1","noaa_urn:oid:2.49.0.1.840.0.01abf7d3c72da9a9bf9fc92c13c084595c142556.001.1","noaa_urn:oid:2.49.0.1.840.0.680e5064316ae3b8260475d5870a314898200b8a.001.1","noaa_urn:oid:2.49.0.1.840.0.9956ca0dc6821c6caf830f18985d62b78cd1c022.001.1","noaa_urn:oid:2.49.0.1.840.0.2a97c90608a8e39a60544c599acbbe8272d00371.001.1","noaa_urn:oid:2.49.0.1.840.0.fd131d6060ba866848b1c54bcbd9ae67da0013e1.001.1","noaa_urn:oid:2.49.0.1.840.0.a551922f63bf793191ca9ac2f8b8ffac98d47f56.001.1"] |
| Iem TypeSummary | D |
| Iem City | 2 NE Laytonsville |
| Iem County | Montgomery |
| Iem State | MD |
| Iem Wfo | LWX |
| Iem Remark | Tree down on MD 650. |
| MergedSources | [{"id":"iem_D_39.230_-77.120_1783290960000","source":"iem","severity":"low","severityValue":25,"timestamp":1783290960000,"latitude":39.23,"longitude":-77.12}] |
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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