Showers and thunderstorms on Monday and Tuesday, clearing for Wednesday

6/13/2021

Most areas should see at least 1/2" of rain with a possibility of over 1" in localized areas from thunderstorms.

Showers throughout the day on Monday

As a trough at 500mb sits over the Midwest, repeated pockets of shortwave energy will round the base and pass through the state, resulting in multiple rounds of showers throughout Monday and continuing into Tuesday. Rain showers begin early Monday morning starting in Western Maine before spreading throughout the rest of the state by the end of the day and into the night. A thunderstorm or two is also possible. Mostly cloudy conditions across the region with a few more breaks in the clouds towards the east. As a result, temperatures should reach the lower 70’s in parts of the east, except for along the coast, while remaining in the 60’s towards the west. Breezy with winds 10-15 mph gusting to 30 mph.

Winds will be quite gusty during the day on Monday, possibly reaching 30mph or more

Showers and thunderstorms persist through Tuesday

Showers and thunderstorms will persist across the region into the day on Tuesday as some breaks in the cloudy skies allow instability to build throughout the day. Some fog is also possible early near and along the coast. No severe storms are expected at this time, but the storms could provide some isolated relief to areas experiencing drought. Temperatures should be in the 70’s in the SW Interior, Capitol District, and Western Foothills but remain in the 60’s elsewhere.

Clusters of disorganized showers and thunderstorms will traverse the state throughout the day on Tuesday, allowing for some areas to pick up some extra rainfall in the strongest storms.

Mostly dry weather on Wednesday

As the disturbance at 500mb moves out of the area on Wednesday, conditions should be dry and mostly sunny except for the possibility of a few stray showers. Temperatures will be around 60 in the western parts of the state and 70’s towards the east, although likely will remain in the 60’s along the coast.

The surface map for Wednesday morning shows low pressure slowly moving off the coast of Maine. Dry air will spill into the state from Canada due to the high pressure system over the Midwest.

A chance of scattered showers Thursday, clear and warm on Friday

A slight chance for showers in the North on Thursday with cooler temperatures before sunny skies and warm temperatures finally make a return for Friday.

Warm temperatures on Friday should make for a nice end to the week after a period of cooler weather.

Mid-June temperature outlook

Cooler temperatures will persist this week before becoming a bit warmer on Friday and remaining so over the weekend and into next week.

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► ► For the latest official forecasts, bulletins, and advisories, please check in with the National Weather Service in Gray for western and southern areas, or Caribou for northern and eastern parts of Maine.

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-Sean

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