Debby becomes “post-tropical,” but severe storms could still occur in Massachusetts

BOSTON – The WBZ Weather team has issued a NEXT Weather Advisory for the remnants of Tropical Storm Debby, which will move through Massachusetts Friday night.

Debby Storm Update

Debby has undergone the transition to a “post-tropical” climate, which essentially means it now resembles a typical low pressure system rather than a tropical system.

What is left of Debby is still deal a good blow and will bring at times heavy rain and isolated severe thunderstorms to New England until the early hours of Saturday.

The Storms Predictions Center classifies the risk of severe weather in central and western Massachusetts as “low” and the risk of tornadoes as two percent.

Further east, closer to Boston, atmospheric parameters for Friday night are not as prone to severe weather. However, we cannot rule out some severe storms in eastern Massachusetts.

When will the effects of Debby be felt in Massachusetts?

The timing has moved forward slightly in the last 24 hours.

In western Massachusetts, the storms could arrive as early as 5 p.m. and 6 p.m. and leave the region between midnight and 2 a.m.

In Central Massachusetts, the greatest danger is between 8 p.m. and 5 a.m.

In Eastern Massachusetts, prime time is between 8 p.m. and 6 a.m.

Finally, the last showers will leave extreme southeastern Massachusetts (Cape Cod area) between 9 and 10 a.m. Saturday.

On Friday evening, gusts of up to 40-56 km/h from the south are expected and a tropical-like air mass will move over the region.

Weekend forecast for the Boston area

There will be big changes during the day on Saturday. Dew points will start the day at 21 degrees Celsius and fall to 15 to 10 degrees Celsius by Saturday evening.

This begins a phase lasting several days with very pleasant, refreshing air.

All outdoor plans for Saturday afternoon and evening as well as Sunday look great!