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 13 June 2026 at 01:00 UTC. It is kept here as a record.
It is the 14th strongest of the 259 detections recorded within 20 km of this point since 11 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 Watch issued June 12 at 6:14PM EDT until June 12 at 9:00PM EDT by NWS Baltimore MD/Washington DC
Urban PEI: 4,615,467 within a heuristic 50 km radius; not unique people.
Nearby, since 11 March 2026
- September 4, 2026 · score 46 · 0.0 km
- September 3, 2026 · score 46 · 0.0 km
- September 2, 2026 · score 46 · 0.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
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 | 0.80/1 |
| Coordinates | 39.0000, -76.6000 |
| Nearest City | Parole (6 km) |
| Urban exposure index (PEI) | 4.6M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-12T22:14:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Watch_noaa_urn:oid:2.49.0.1.840.0.07ca3d29b396c5d17ff5be28d9dc10c6 |
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: 2026-06-12T22:14:00.000Z.
First archived: 2026-06-12T22:48:27.489Z. 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 Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Chesapeake Bay from Sandy Point to North Beach MD; Chesapeake Bay from North Beach to Drum Point MD; Chesapeake Bay from Drum Point MD to Smith Point VA; Tidal Potomac from Key Bridge to Indian Head MD; Tidal Potomac from Indian Head to Cobb Island MD; Tidal Potomac from Cobb Island MD to Smith Point VA; Patapsco River including Baltimore Harbor; Chester River to Queenstown MD; Eastern Bay; Choptank River to Cambridge MD and the Little Choptank River; Patuxent River to Broomes Island MD; Tangier Sound and the inland waters surrounding Bloodsworth Island; District of Columbia, DC; Anne Arundel, MD; Calvert, MD; Charles, MD; Montgomery, MD; Prince Georges, MD; St. Marys, MD; Albemarle, VA; Arlington, VA; Augusta, VA; Clarke, VA; Culpeper, VA; Fairfax, VA; Fauquier, VA; Greene, VA; Highland, VA; King George, VA; Loudoun, VA; Madison, VA; Nelson, VA; Orange, VA; Page, VA; Prince William, VA; Rappahannock, VA; Rockingham, VA; Shenandoah, VA; Spotsylvania, VA; Stafford, VA; Warren, VA; City of Alexandria, VA; City of Charlottesville, VA; City of Fairfax, VA; City of Falls Church, VA; City of Fredericksburg, VA; City of Harrisonburg, VA; City of Manassas, VA; City of Manassas Park, VA; City of Staunton, VA; City of Waynesboro, VA; Hardy, WV; Pendleton, WV |
| Headline | Severe Thunderstorm Watch issued June 12 at 6:14PM EDT until June 12 at 9:00PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-06-12T21:00:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | false |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.07ca3d29b396c5d17ff5be28d9dc10c6e8b91480.004.1","noaa_urn:oid:2.49.0.1.840.0.07ca3d29b396c5d17ff5be28d9dc10c6e8b91480.003.1"] |
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.
Want to know when something happens near Parole?