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Key Takeaways:

• Severe thunderstorms expected in parts of Maine, Connecticut, Rhode Island, and Southeastern Massachusetts.
• Potential for heavy rainfall leading to flooding, with some areas possibly receiving up to 4 inches in six hours.
• Phenomenon of “training” storms may cause repeated downpours over the same areas.
• High atmospheric moisture levels contribute to storm intensity.
• Severe weather threat includes gusty winds up to 50-60 mph until 10 p.m.

Severe Thunderstorm Warnings Issued Across New England

Severe thunderstorm warnings have been issued for parts of Maine, Connecticut, Rhode Island, and southeastern Massachusetts. The region braces for potentially heavy downpours and flooding as atmospheric conditions align to produce significant storms.

Understanding “Training” Storms and Their Impact

The environment ahead of a cold front is ripe for storms to train over the same areas—a phenomenon known as “training.” This is similar to how heavy rain played out in Texas Hill Country. Unlike storms that move through quickly, these storms backbuild on top of one another and seemingly stay static, leading to prolonged periods of heavy rainfall in specific locations.

Atmospheric Conditions Fueling the Storms

The humid and moist sector of air overhead is roughly two times the norm. This elevated level of atmospheric moisture, known as precipitable water or PWATs, contributes to the intensity of the storms and the potential for heavy rainfall.

Flooding Risk and Rainfall Projections

Higher resolution models have hinted at Providence and along Route 44 into eastern Massachusetts for up to 4 inches of rain in a six-hour window. In some spots, 2 inches of rain could fall in just 45 minutes. Such intense rainfall rates could overwhelm roadways with water and clog drains, leading to dangerous flooding conditions.

Timing of the Storms

The onset of showers looks to be around 3 p.m., starting off spotty in coverage with low rumbles of thunder. Downpours will pick up along and south of the Massachusetts Turnpike around 5 p.m., moving into Rhode Island. Residents should be prepared for rapidly changing weather conditions during the evening commute.

Severe Weather Threats Beyond Rainfall

“We shouldn’t let our guard down either for severe weather,” the report warns. “This will be an area-wide threat, with gusty winds near 50-60 mph, until 10 p.m.” These strong winds could lead to downed trees and power lines, further exacerbating hazardous conditions.

Staying Informed and Prepared

Residents are urged to stay alert and monitor the latest weather updates. “If you haven’t already done it, download the NBC10 Boston app for the latest weather alerts. Be sure to turn on the alerts too!” the original report advises.

Extended Forecast

The rain isn’t done for the week. A stationary front will keep showers around, though much lighter and sporadic in nature, through Thursday. While the intensity may decrease, the continued precipitation could contribute to already saturated grounds and ongoing flooding concerns.