Reported by IEM today.
It is the 411th strongest of the 848 detections recorded within 20 km of this point since 10 March 2026. The last comparable one was on 30 August 2026.
What the source measured
IEM reported: A thunderstorm produced an estimated wind gust to 34 knots (39 MPH) near the ASOS at Ronald Reagan Washington National Airport (KDCA) adjacent to the tidal Potomac River.
An estimated 4,662,427 people live within 50 km of this point.
Nearby, since 10 March 2026
- May 19, 2026 · score 52 · 0.0 km
- April 1, 2026 · score 52 · 0.0 km
- March 17, 2026 · score 52 · 0.0 km
How we know
Confirmed by 2 independent sources, including IEM.
Our own score for this event is 58 out of 100, at 74 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | high |
| Calamity Score (ours) | 58 / 100 |
| Our confidence | 74% |
| Coordinates | 38.8500, -77.0300 |
| Nearest City | Southwest Waterfront (3 km) |
| Population Exposed | 4.7M within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-08-31T00:01:00.000Z |
| Source | https://mesonet.agron.iastate.edu/lsr/ |
Score Breakdown
Technical Details
| TypeSummary | M |
| Magnitude | 39 |
| Unit | mph |
| City | Reagan National Arpt |
| County | Arlington |
| State | VA |
| Wfo | LWX |
| Remark | A thunderstorm produced an estimated wind gust to 34 knots (39 MPH) near the ASOS at Ronald Reagan Washington National Airport (KDCA) adjacent to the tidal Potomac River. |
| Ogimet StationId | 72503 |
| Ogimet WindSpeed | 34 |
| Ogimet WindUnit | knots |
| Ogimet Temperature | 25 |
| Ogimet TemperatureUnit | C |
| Ogimet RawSynop | 08,31,02,51,AAXX 31034 72503 12666 8//03 10250 20211 30169 40183 50007 69937 90251 555 93103= |
| MergedSources | [{"id":"ogimet_72503_1788152690888","source":"ogimet","severity":"high","severityValue":70,"timestamp":1788152690888,"latitude":38.9,"longitude":-77}] |
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 58/100, near Southwest Waterfront (United States), based on data from iem. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.