Right now
The most recent data we hold from IEM arrived 6 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Reported by IEM 171 days ago.
What the source measured
IEM reported: M report (43 mph) near Reagan National Arpt, Arlington Co., VA. Source: NWS LWX.
Urban PEI: 4,662,427 within a heuristic 50 km radius; not unique people.
How we know
2 recorded sources include IEM; 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 | 0.63/1 |
| Coordinates | 38.8500, -77.0300 |
| Nearest City | Southwest Waterfront (3 km) |
| Urban exposure index (PEI) | 4.7M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-04-01T20:55:00.000Z |
| Source | https://mesonet.agron.iastate.edu/lsr/ |
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: iem. Occurrence: 2026-04-01T20:55:00.000Z.
First archived: 2026-04-02T09:00:59.059Z. 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
| TypeSummary | M |
| Magnitude | 43 |
| Unit | mph |
| City | Reagan National Arpt |
| County | Arlington |
| State | VA |
| Wfo | LWX |
| Google News RssFeed | weather |
| Google News SourceName | WTMJ |
| MergedSources | [{"id":"gnews_weather_493074_263","source":"google_news","severity":"medium","severityValue":40,"timestamp":1775067816000,"latitude":38.9,"longitude":-77.04}] |
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 Southwest Waterfront?