Right now
The most recent data we hold from NOAA arrived 65 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 17 March 2026 at 04:00 UTC. It is kept here as a record.
It is the 11th strongest of the 180 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Watch issued March 16 at 9:16PM EDT until March 17 at 12:00AM EDT by NWS Wakefield VA
Urban PEI: 116,699 within a heuristic 50 km radius; not unique people.
Nearby, since 17 March 2026
- June 10, 2026 · score 37 · 4.5 km
- June 15, 2026 · score 43 · 6.0 km
- June 10, 2026 · score 37 · 7.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 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) | 43 / 100 |
| Legacy data-support index | 0.77/1 |
| Coordinates | 39.1857, -75.8286 |
| Nearest City | Dover (27 km) |
| Urban exposure index (PEI) | 116.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-17T01:16:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Watch_noaa_urn:oid:2.49.0.1.840.0.bfad7355a3b8233c99877e674e41cd58 |
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: 2026-03-17T01:16:00.000Z.
First archived: 2026-03-17T02:05:43.212Z. 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 Smith Point to Windmill Point VA; Chesapeake Bay from Windmill Point to New Point Comfort VA; Chesapeake Bay from New Point Comfort to Little Creek VA; Currituck Sound; Chesapeake Bay from Little Creek VA to Cape Henry VA including the Chesapeake Bay Bridge Tunnel; Rappahannock River from Urbanna to Windmill Point; York River; James River from Jamestown to the James River Bridge; James River from James River Bridge to Hampton Roads Bridge-Tunnel; Coastal waters from Fenwick Island DE to Chincoteague VA out 20 nm; Coastal waters from Chincoteague to Parramore Island VA out 20 nm; Coastal waters from Parramore Island to Cape Charles Light VA out 20 nm; Coastal Waters from Cape Charles Light to Virginia-North Carolina border out to 20 nm; Coastal waters from NC VA border to Currituck Beach Light NC out 20 nm; Dorchester, MD; Somerset, MD; Wicomico, MD; Worcester, MD; Bertie, NC; Camden, NC; Chowan, NC; Currituck, NC; Gates, NC; Hertford, NC; Pasquotank, NC; Perquimans, NC; Accomack, VA; Charles City, VA; Essex, VA; Gloucester, VA; Isle of Wight, VA; James City, VA; King and Queen, VA; King William, VA; Lancaster, VA; Mathews, VA; Middlesex, VA; New Kent, VA; Northampton, VA; Northumberland, VA; Prince George, VA; Richmond, VA; Southampton, VA; Surry, VA; Sussex, VA; Westmoreland, VA; York, VA; City of Chesapeake, VA; City of Franklin, VA; City of Hampton, VA; City of Hopewell, VA; City of Newport News, VA; City of Norfolk, VA; City of Poquoson, VA; City of Portsmouth, VA; City of Suffolk, VA; City of Virginia Beach, VA; City of Williamsburg, VA; Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm; Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm; Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm and 4 more areas |
| Headline | Severe Thunderstorm Watch issued March 16 at 9:16PM EDT until March 17 at 12:00AM EDT by NWS Wakefield VA |
| Expires | 2026-03-17T00:00:00-04:00 |
| SenderName | NWS Wakefield VA |
| HasExactCoords | false |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.bfad7355a3b8233c99877e674e41cd58c0b9b576.003.1","noaa_urn:oid:2.49.0.1.840.0.bfad7355a3b8233c99877e674e41cd58c0b9b576.002.1","noaa_urn:oid:2.49.0.1.840.0.3e3e30728cb43808436e4002da6679da1a5ff554.001.1","noaa_urn:oid:2.49.0.1.840.0.3e3e30728cb43808436e4002da6679da1a5ff554.002.1","noaa_urn:oid:2.49.0.1.840.0.3e3e30728cb43808436e4002da6679da1a5ff554.003.1","noaa_urn:oid:2.49.0.1.840.0.d2d762cc7528bb76cd42ea27934b1f85035e82a6.002.1","noaa_urn:oid:2.49.0.1.840.0.d2d762cc7528bb76cd42ea27934b1f85035e82a6.001.1"] |
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.
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