A low-pressure area formed from a weakening cold front and nearby disturbed weather in the western Atlantic northeast of Bermuda. A closed low-level circulation developed about 150 nautical miles east-southeast of Bermuda, and the system became a subtropical depression at 0600 UTC on 24 September 2021. It strengthened into Subtropical Storm Teresa by 1200 UTC that day, moved northwestward and then west-northwestward, slowed and turned eastward as a second low formed to its north, and became a remnant low late on 25 September. The remnant low weakened to a trough about 250 nautical miles northeast of Bermuda on 26 September and was absorbed by a frontal system on 27 September. Teresa existed as a subtropical cyclone for roughly 36 hours from 24–25 September.
Teresa did not make any landfalls. The cyclone passed close to Bermuda but stayed offshore, so no coastal watches or warnings were issued.
The peak intensity was 40 knots (46 mph) with a minimum central pressure of 1008 millibars, reached at about 1800 UTC on 24 September. At peak it was a subtropical storm (equivalent to a minimal tropical-storm-strength system).
Impacts from Teresa were minimal. There were no surface observations of gale-force winds reported, and the Atlantic island of Bermuda experienced only minor effects. The official report lists no storm surge measurements or noteworthy rainfall totals associated with Teresa; no significant coastal inundation or heavy-rainfall reports were recorded for named cities or counties.
There were no reported deaths or damage tied to Teresa. The storm was short-lived and caused no reported casualties or property loss.
Teresa’s formation was poorly forecast: the disturbance was only introduced in the Tropical Weather Outlook about 12 hours before genesis and model guidance did not predict a subtropical cyclone. Official track and intensity forecast errors at the 12-hour verifying time were larger than recent 5-year averages, but the storm’s brief life limited the number of forecasts and opportunities for verification.
Paid members can generate summaries tailored to the counties of their choice. The Teresa TCR covers impacts across many counties and states — a Pinellas County resident doesn't need the Asheville detail, and a Buncombe County resident doesn't need the Tampa surge data.
Upgrade for county-specific summariesSummary above produced from the National Hurricane Center's official post-storm Tropical Cyclone Report. Read the full report for casualty lists, damage estimates by area, forecast critique, and detailed meteorological discussion:
📄 Read NHC's full report on Teresa → (opens at nhc.noaa.gov)| Time (UTC) | Status | Lat | Lon | Winds (kt) | Pressure (mb) | Record |
|---|---|---|---|---|---|---|
| 2021-09-24 06:00 | SD | 31.40 | -62.00 | 30 | 1011 | |
| 2021-09-24 12:00 | SS | 32.80 | -62.90 | 35 | 1010 | |
| 2021-09-24 18:00 | SS | 33.60 | -64.10 | 40 | 1008 | |
| 2021-09-25 00:00 | SS | 34.10 | -65.00 | 40 | 1008 | |
| 2021-09-25 06:00 | SS | 34.30 | -65.50 | 35 | 1009 | |
| 2021-09-25 12:00 | SD | 34.30 | -65.20 | 30 | 1010 | |
| 2021-09-25 18:00 | LO | 34.30 | -64.50 | 30 | 1010 | |
| 2021-09-26 00:00 | LO | 34.70 | -63.90 | 30 | 1010 | |
| 2021-09-26 06:00 | LO | 35.20 | -63.20 | 30 | 1010 | |
| 2021-09-26 12:00 | LO | 35.60 | -61.80 | 25 | 1011 |
Source: NOAA National Hurricane Center HURDAT2 best-track database (nhc.noaa.gov/data). Data is in the public domain. Best-track positions and intensities are post-storm reanalysis estimates and may differ from real-time advisories.