Post-Tropical Cyclone Dexter 2025
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Live tracking map, satellite images and forecasts of Post-Tropical Cyclone Dexter 2025 in the North Atlantic Ocean. Current wind speed 60mph. Max 50mph.
Satellite imagery and surface observations indicate that Dexter has completed its transition to an extratropical cyclone. Strong westerly wind shear is leaving an exposed, elongated center with all convection in the eastern semicircle. The convection is decreasing in strength and areal coverage, and it is also becoming more asymmetric. A warm front clearly extends east-northeastward from Dexter, and there also appears to be a developing cold front extending towards the southwest, as noted in an earlier AMSR2 microwave pass. Surface marine observations show temperatures in the upper 50s and lower 60s just a couple hundred n mi northwest of Dexter's center. A recent partial ASCAT pass showed winds up to 50 mph (45 knots), but this pass did not sample the entire circulation. The initial intensity of the extratropical cyclone is increased to 60 mph (50 knots) based on the ASCAT data as well as global model analyses, which suggest the winds have likely reached 60 mph (50 knots).
Dexter is merging with an approaching mid- to upper-level trough. Global models show strengthening over the next 12–24 hours due to baroclinic forcing due to the trough interaction. Thereafter, the cyclone will begin to steadily weaken late Friday into the weekend as the upper-level trough dampens out. The NHC intensity forecast is near the high end of the guidance during the first 24 hours of the forecast, and near the middle of the guidance envelope thereafter. The cyclone is forecast to weaken to a trough in 4 to 5 days.
The initial motion is 070/15. A motion between northeast and east-northeast is expected during the next 24–36 hours as Dexter interacts with the aforementioned trough. After that time, a slight bend more toward the east is expected as the cyclone is steered by the mid-latitude flow. The new NHC forecast is a bit slower than the previous one, and lies in between the simple and corrected consensus aids.