'Retrograding' low keeps the East Coast damp, chilly temperatures hang on

·2 min read
'Retrograding' low keeps the East Coast damp, chilly temperatures hang on
'Retrograding' low keeps the East Coast damp, chilly temperatures hang on

Sunday will be another day where temperatures will struggle to reach the mid-teens in many parts of the Maritimes, thanks to a chilly northeasterly flow delivering cool air. This comes as a rainy system continues to 'retrograde' and push onshore. The heaviest rains will target the Bay of Fundy through the day, with 30-mm expected by the time the low exits. Because of the nature of the system's track, showers will linger into Monday for parts of the Maritimes and Newfoundland. However, high pressure and a considerable warm-up will return to the region for the start of this week. Meanwhile, forecasters are keeping a close eye on Elsa and any potential for impacts on the region. More on the timing and amounts, below.

SUNDAY: RAIN HANGS ON, CHILLY TEMPERATURES AS LOW RETROGRADES

The current low-pressure system in the Atlantic will track between Cape Breton Island and Newfoundland through Sunday, with heavier rains ramping up in the latter during the day.

ATLPressure
ATLPressure

What is unique about this low is that it actually take a turn west back toward the Maritimes into Sunday, known as a 'retrograde' pattern, which is counter to the normal eastward motion of similar systems.

The rain will depart most of the Atlantic region Sunday night, but due to the low retrograding, it will linger into P.E.I., Cape Breton Island and Newfoundland into Monday morning.

Rainfall totals through Monday will be heaviest in coastal communities around the Bay of Fundy, with 30-50 mm of expected, while parts of Cape Breton Island may see 20-30 mm by the end of the system.

Elsewhere, widespread totals of 5-20 mm are possible, including 15-20 mm for western Newfoundland and 5-10 mm in the Avalon and Burin peninsulas.

ATLRain
ATLRain

Temperature-wise, gusty northwesterly winds wrapping around the low will keep temperatures below-seasonal for early July on Sunday.

In fact, Newfoundland will see single digits or highs barely hitting double digits. The Maritimes won't fare much better, either, with daytime highs sitting in the low- to mid-teens.

NEXT WEEK: A CALM AND SEASONAL PATTERN RETURNS

Conditions will return to a calmer and more seasonal state heading into the workweek, bringing generally pleasant conditions across the region through midweek.

However, forecasters are keeping an eye on distant Tropical Storm Elsa as it tracks through the Caribbean Sea. It’s still too early to know what, if any, impacts the system or its remnants could have on Atlantic Canada.

ATLTempTues
ATLTempTues

"There's a low probability of any impact, but still something to watch," Dr. Doug Gillham, a meteorologist at The Weather Network, says. "A few models do show a track near the U.S. East Coast and into the region late next week or weekend. However, much too early to headline any threats – Elsa could readily stay south with no impact to the region."

Check back for the latest updates on conditions across Atlantic Canada.

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