Wednesday: Warm with isolated showers
The low pressure system to the south of Maine will linger again on Wednesday, bringing isolated showers to southern portions of Maine. It'll be a little muggy, with dew points statewide ranging from 65-69. Northern areas of Maine will be in the upper 70s with small pockets reaching into the low 80s for high temperatures, and the rest of the state in the low to mid 70s. Winds will be calm to light and from the north. As the low pressure begins to linger away from the state, skies will begin to clear by the afternoon.
The image above displays precipitable water (PW), which is the amount of water vapor in the air above a specific point. In combination with lifting mechanisms and energy available in the atmosphere, it is potentially the amount of water it could rain in that spot. As this moderately weak low pressure begins to linger away, spots in the Portland and Mid Coast areas have a spike in PW, where there most likely will be isolated showers for Wednesday. Though, since there is little energy and the lifting mechanism is weak and moving away, these showers won't produce nearly as much as the PW value is, but the image helps with location of potential rain showers.
Thursday: Cold front swings in, bringing some scattered showers
The GIF above runs from 7 AM to 7 PM Thursday. Thursday will begin warm and heat up into the low 80s by early afternoon. During mid-afternoon, a cold front will swing down from the north, cooling down the state into the low to mid 70s by late afternoon and evening.
The GIF above runs from 12 PM to 7 PM Thursday. A cold front acts as a lifting mechanism, so as it pushes down into the state from the north, isolated and scattered showers and small thunderstorms are likely for mid to late afternoon. Statewide is susceptible to these scattered showers, so at the first sign of thunder, move indoors to prevent any lightning incidents, and check your local radar for exact location of any storm that develops near you.
Holiday Weekend Outlook
The GIF above runs from 7 AM Friday to 7 PM Sunday. As the Fourth of July weekend approaches, we can look at potential temperatures for Friday, Saturday and Sunday. Temperatures look pleasantly warm through the weekend; Friday in the mid to upper 70s, Saturday in the mid 70s to low 80s, and Sunday in the mid to upper 70s. There looks to be no significant precipitation for the weekend.
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