This alert expired on 5 July 2026 at 01:15 UTC. It is kept here as a record.
It is the 2nd strongest of the 255 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day. 9 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 4 at 8:38PM EDT until July 4 at 9:15PM EDT by NWS Baltimore MD/Washington DC
An estimated 1,558,135 people live within 50 km of this point.
Nearby, since 12 March 2026
- August 7, 2026 · score 46 · 4.2 km
- March 17, 2026 · score 52 · 8.0 km
- August 3, 2026 · score 46 · 9.1 km
How we know
Confirmed by 6 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 89 % 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) | 52 / 100 |
| Our confidence | 89% |
| Coordinates | 40.4509, -74.8751 |
| Nearest City | Hillsborough (21 km) |
| Population Exposed | 1.6M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-05T00:38:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.c587d3e44a6f60583ac4143a2f55224d |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Charles, MD; St. Marys, MD; Cecil, MD; Harford, MD; Columbia, PA; Montour, PA; Northumberland, PA; Snyder, PA and 10 more areas |
| Headline | Severe Thunderstorm Warning issued July 4 at 8:38PM EDT until July 4 at 9:15PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-07-04T21:15:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 13 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.c587d3e44a6f60583ac4143a2f55224dcf19d0e7.001.1","noaa_urn:oid:2.49.0.1.840.0.a00a63d33a41966f49fce7a7b490709ce8535def.001.1","noaa_urn:oid:2.49.0.1.840.0.d98ff1b69b0c4d53fe3be5b42fca2daa4f114272.002.1","noaa_urn:oid:2.49.0.1.840.0.41100706dcd8546e22e9e24b5867468f32899269.001.1","noaa_urn:oid:2.49.0.1.840.0.30b63562cabd8287b997309d535db1b246935098.001.1","noaa_urn:oid:2.49.0.1.840.0.af871216311a2b54ddfac97a9166c7a1440fbe84.001.1","noaa_urn:oid:2.49.0.1.840.0.a0141f602286133bae2c55c304282efd800e96b4.001.1","noaa_urn:oid:2.49.0.1.840.0.a75c3187fa35942714a1550a51e7bfb28732c5fa.001.1","noaa_urn:oid:2.49.0.1.840.0.8c93e307f36f10b21b6e8e06fcd73a162da14802.001.1","noaa_urn:oid:2.49.0.1.840.0.626f2c40d362a2b2ff151f82669d72ee73ce2d15.001.1","noaa_urn:oid:2.49.0.1.840.0.a34fff077e002f7ae352a8af497d276bfbe5f623.001.1","noaa_urn:oid:2.49.0.1.840.0.ef32cbebfb336c7f86808941d8087fe63cd8d207.001.1","noaa_urn:oid:2.49.0.1.840.0.f146e5f0e3811d6f1d1ab76597917d594e4fb8c3.002.1"] |
| Iem TypeSummary | D |
| Iem City | Blairstown Twp |
| Iem County | Warren |
| Iem State | NJ |
| Iem Wfo | PHI |
| Iem Remark | Several trees and wires down across Blairstown. Time estimated by radar. |
| Google News RssFeed | weather |
| Google News SourceName | CBS News |
| MergedSources | [{"id":"iem_D_41.040_-75.130_1783205520000","source":"iem","severity":"low","severityValue":25,"timestamp":1783205520000,"latitude":41.04,"longitude":-75.13},{"id":"iem_D_41.060_-75.070_1783205700000","source":"iem","severity":"low","severityValue":25,"timestamp":1783205700000,"latitude":41.06,"longitude":-75.07},{"id":"iem_D_41.050_-75.090_1783205700000","source":"iem","severity":"low","severityValue":25,"timestamp":1783205700000,"latitude":41.05,"longitude":-75.09},{"id":"iem_D_40.980_-74.960_1783206600000","source":"iem","severity":"low","severityValue":25,"timestamp":1783206600000,"latitude":40.98,"longitude":-74.96},{"id":"gnews_weather_495334_192","source":"google_news","severity":"medium","severityValue":40,"timestamp":1783205280000,"latitude":39.95,"longitude":-75.16}] |
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 52/100, near Hillsborough (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.