Right now
The most recent data we hold from NOAA arrived 8 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
This alert expired on 6 July 2026 at 02:15 UTC. It is kept here as a record.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 5 at 8:58PM EDT until July 5 at 10:15PM EDT by NWS Mount Holly NJ
Urban PEI: 1,750,838 within a heuristic 50 km radius; not unique people.
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 | 0.89/1 |
| Coordinates | 39.6592, -76.5483 |
| Nearest City | Hunt Valley (19 km) |
| Urban exposure index (PEI) | 1.8M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-06T00:58:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.23dcbf17771e0b08ae5a308907d4f999 |
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: 2026-07-06T00:58:00.000Z.
First archived: 2026-07-06T01:00:59.464Z. 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 | Berks, PA; Chester, PA; Montgomery, PA; Hunterdon, NJ; Morris, NJ; Somerset, NJ; Baltimore, MD; Harford, MD and 5 more areas |
| Headline | Severe Thunderstorm Warning issued July 5 at 8:58PM EDT until July 5 at 10:15PM EDT by NWS Mount Holly NJ |
| Expires | 2026-07-05T22:15:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 8 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.23dcbf17771e0b08ae5a308907d4f999a0af87f0.001.1","noaa_urn:oid:2.49.0.1.840.0.180e0f6f54e709d4df5963b53153c3129382bc13.001.1","noaa_urn:oid:2.49.0.1.840.0.8835882848792a495c9a136550d2add58757c1f2.001.1","noaa_urn:oid:2.49.0.1.840.0.c01448805c018f09165a0a5cecb088a8bda4ce55.002.1","noaa_urn:oid:2.49.0.1.840.0.6289028751e3344289b00e04bbef9bc9b4380cd5.002.1","noaa_urn:oid:2.49.0.1.840.0.20fbec5cd1b816f405a3d438b86880c61707b8f2.002.1","noaa_urn:oid:2.49.0.1.840.0.00fd02bbf8cc09b7ec0bd71c93d91be74d77d558.001.1","noaa_urn:oid:2.49.0.1.840.0.e32ef616baf4987da60c14c75041983eef680cee.001.1"] |
| Iem TypeSummary | F |
| Iem City | Hummelstown |
| Iem County | Dauphin |
| Iem State | PA |
| Iem Wfo | CTP |
| Iem Remark | Numerous cars underwater in Hummelstown near Swatara Creek. Many reports of 3.5-4.0 inches of rain in 45 minutes. Water rescues in progress. |
| 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},{"id":"iem_F_40.270_-76.710_1783298340000","source":"iem","severity":"low","severityValue":25,"timestamp":1783298340000,"latitude":40.27,"longitude":-76.71}] |
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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