Morning Thunderstorms to Pass, High Humidity Will Linger - NBC10 Boston

Morning Thunderstorms to Pass, High Humidity Will Linger

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    Downpours Over New England This Morning

    Friday: Morning downpours, then some partial afternoon clearing with just a spot storm. Highs in the 80s, muggy. Friday Night: Clearing, less humid. Lows in the 60s. Saturday: Sunny and less humid. Highs in the 80s. (Published Friday, July 12, 2019)

    A front is producing showers and thunderstorms Friday morning as rainfall rates greater than 2 inches per hour continue to cause flash flooding.

    There are many reports of closed roads, roads washed out, and water rescues because of this rain overnight, with spotty locations receiving 4-to-6-inches of rain in a short time.

    The front should gradually move out in the morning, with sunny breaks and temperatures in the 80s, dew points in the lower 70s. It's pretty close to as sticky as we get around here. There’s enough instability left for a few showers and thunderstorms in the afternoon. Each one can be heavy, but smaller and more highly localized.

    Low pressure developing on the front will move along the Maine coast, with the wind coming in from the east ahead of the low, then from the west. Not a lot of wind until later in the day when it picks up. Less humid air starts to come in from west to east overnight with partial clearing.

    Although technically it’s a cold front, it is not colder behind the front, just less humid. That means Saturday is going to be a hot one with high temperatures close to 90 degrees in southern New England, 80s north and west.

    Another front from Canada passes through Friday night, maybe with a shower or two during the evening in western and northern New England. Then, less humid air will come in for Sunday. Under sunny skies, high temperatures will be in the 80s Sunday. An absolute beauty.

    In the Gulf of Mexico, Tropical Storm Barry continues to strengthen and gets closer to a hurricane as it comes onshore near in Louisiana Friday night or early Saturday morning. Wind is not a huge factor but flooding rain is.

    Extreme Weather Photos: Twister Touches Down on North TexasExtreme Weather Photos: Twister Touches Down on North Texas

    The Mississippi river was already experiencing major flooding from rains during spring and early summer. This is a disaster for the lower Mississippi Valley.

    The remnant of Barry will become absorbed in the westerly flow across the United States and bring us some heavier rain later next week. But before that happens, we have a significant heat wave building, with temperatures getting to at least 90 degrees on Tuesday and likely lasting into Thursday.

    This is before heavy rains with a remnant of Barry combine with a front from Canada to soak us and end the heat later next week. Stay tuned to latest developments in our First Alert 10-Day Forecast.

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