Right now
The most recent data we hold from NOAA arrived 13 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 01:15 UTC. It is kept here as a record.
It is the 3rd 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 8:37PM EDT until July 5 at 9:15PM EDT by NWS Mount Holly NJ
Urban PEI: 1,798,740 within a heuristic 50 km radius; not unique people.
Nearby, since 12 March 2026
- March 12, 2026 · score 52 · 5.3 km
- March 17, 2026 · score 52 · 5.9 km
- March 16, 2026 · score 52 · 5.9 km
How we know
4 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 | 0.88/1 |
| Coordinates | 39.5532, -77.0593 |
| Nearest City | Westminster (6 km) |
| Urban exposure index (PEI) | 1.8M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-06T00:37:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.3823fa5d1979bd0225df8e7693fa0c50 |
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: 2026-07-06T00:37:00.000Z.
First archived: 2026-07-06T00:39:38.320Z. 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 | Hunterdon, NJ; Morris, NJ; Somerset, NJ; Dauphin, PA; Lancaster, PA; Lebanon, PA; York, PA; Anne Arundel, MD; Howard, MD; Prince Georges, MD and 5 more areas |
| Headline | Severe Thunderstorm Warning issued July 5 at 8:37PM EDT until July 5 at 9:15PM EDT by NWS Mount Holly NJ |
| Expires | 2026-07-05T21:15:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 8 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.3823fa5d1979bd0225df8e7693fa0c50b6fe920f.001.1","noaa_urn:oid:2.49.0.1.840.0.2fb0103f8eec33ba25133f747388b05e9f2b35d1.001.1","noaa_urn:oid:2.49.0.1.840.0.6b852930b0a791048ed838d596dd15157879a93a.001.1","noaa_urn:oid:2.49.0.1.840.0.e32ef616baf4987da60c14c75041983eef680cee.001.1","noaa_urn:oid:2.49.0.1.840.0.c0697a24ce4f2070cfc11e4dd4a0f3c8696e2687.001.1","noaa_urn:oid:2.49.0.1.840.0.7e087474f8105cff7cca967738c72408b203fd84.002.1","noaa_urn:oid:2.49.0.1.840.0.2c9e79548c1452e019cc2eeebbf0b923d873bed8.001.1","noaa_urn:oid:2.49.0.1.840.0.fc20ab3a77e30d57eb6f0b27dce5feef72b07ccb.002.1"] |
| Iem TypeSummary | D |
| Iem City | 3 S Roxbury Mills |
| Iem County | Montgomery |
| Iem State | MD |
| Iem Wfo | LWX |
| Iem Remark | Numerous trees down at the intersection of Damascus Rd. and Georgia Ave. |
| MergedSources | [{"id":"iem_D_39.230_-77.120_1783290960000","source":"iem","severity":"low","severityValue":25,"timestamp":1783290960000,"latitude":39.23,"longitude":-77.12},{"id":"iem_G_39.180_-77.100_1783292760000","source":"iem","severity":"low","severityValue":25,"timestamp":1783292760000,"latitude":39.18,"longitude":-77.1},{"id":"iem_D_39.220_-77.060_1783291560000","source":"iem","severity":"low","severityValue":25,"timestamp":1783291560000,"latitude":39.22,"longitude":-77.06}] |
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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