Severe Thunderstorms this Evening with Cooler and Drier Weather Ahead

5/26/2021

Thunderstorms initiating Wednesday evening
and some could become severe

Throughout the remainder of Wednesday, warm, moist unstable air along and ahead of a trough east of the cold front coupled with moderate vertical wind shear will allow severe thunderstorms to develop over most of the state. The primary threats are damaging winds, heavy rain, and small hail. There is even the chance for an isolated tornado in southwestern Maine. The storms may bring some isolated relief to areas affected by drought conditions, however, heavy rain coupled with a dry ground often leads to excessive runoff as water absorbs less readily into dry soil. Storms are already beginning to fire in western Maine and will strengthen and increase in density before exiting the coast later Wednesday evening.

Cooler and drier conditions for Thursday and Friday

Behind the cold front, drier and cooler conditions associated with high pressure will follow during the day on Thursday, bringing relief from the muggy conditions today.

Temperatures will reach about 70 in the southern part of the state and the mid-50’s in the northern regions, while overnight, temperatures may fall below freezing in the north. The sky will be mostly clear and breezy with winds 10-15 mph.

Friday will be another dry and cool day with temperatures in the mid-60’s over the SW interior, upper-40’s over the western mountains, and mid-50’s elsewhere. Clouds will move in later during the day as a low pressure system passes to the south. Overnight, there is an isolated chance of a few showers in the southern tip of the state and the possibility of below freezing temperatures in the north.

Weekend outlook

Looking ahead towards the Memorial Day weekend, Saturday and Sunday appear to be dry but there is growing agreement between the models for a low pressure system to bring showers to the area on Monday.

Stay tuned for updates!

Temperature outlook through early June

The plots below show the trend of the high and low temperatures for Carrabassett, Bangor, Caribou, and Portland over the next week and a half. Temperatures are very high Wednesday before dropping after the passing of the cold front Wednesday evening and rising slowly over the 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 Melanson

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