Dexter — 2025

Dexter formed from a non-tropical low along a stationary front over the western Atlantic. The low developed a well-defined circulation off the coast of the Carolinas on 2 August and lost its frontal characteristics to become Tropical Storm Dexter about 1800 UTC 3 August, roughly 325 nautical miles west‑northwest of Bermuda. It remained over the open western Atlantic as a tropical cyclone from 3–6 August, then became extratropical at 0000 UTC 7 August and briefly strengthened as an extratropical cyclone on 7–8 August while moving northeastward toward the North Atlantic. There were no landfalls associated with Dexter. The storm stayed well offshore and did not prompt any coastal watches or warnings. Dexter’s maximum intensity as a tropical cyclone was 50 knots (about 58 mph) sustained, reached from 1200–1800 UTC 6 August, with an estimated minimum central pressure of 999 mb. At peak as a tropical system it was a moderate tropical storm. After becoming extratropical, the system briefly reached hurricane‑force winds as an extratropical cyclone on 8 August while southeast of Newfoundland. Because Dexter remained over the open ocean, there were no storm surge reports for coastal locations. There were also no reports of significant rainfall totals on land in association with Dexter; available observations came from buoys and satellites rather than from cities or counties. No damage or casualties were reported in connection with Dexter. The storm did not affect land and produced no direct fatalities. One notable aspect of the meteorological analysis was that genesis was not well anticipated far in advance: the first NHC outlook indicating a low chance of formation was issued about 30 hours before genesis, with the chance raised to medium 12 hours prior. NHC track forecasts performed very well for Dexter, with official track errors well below recent 5‑year means.