Today and Tonight: A cold front is forecast to enter northwestern Aroostook County late this morning and then cross eastern Aroostook County this afternoon. I expect widespread showers throughout the day today. Cloud cover will prevent significant instability, therefore I only expect some embedded isolated thunderstorms this afternoon. With that said, there is strong shear values around, so any thunderstorms that do develop may be accompanied by strong gusty winds. High temperatures today will be near 63 Degrees.
Showers will come to an end this evening and I expect partly cloudy skies after midnight tonight. Low temperatures tonight will be near 38 Degrees.
Friday through Saturday: A cool northwest wind flow is expected on Friday, therefore I expect a cool and windy day with partly sunny skies expected. High temperatures Friday will be near 52 Degrees.
High pressure will briefly build over the area Friday night and will give us a partly cloudy night with low temperatures near 35 Degrees.
On Saturday, Low pressure will track from New York state early Saturday morning to southern Quebec province Saturday evening. At the same time, a secondary low pressure system will develop over the northern Gulf of Maine during Saturday and tracks into the Bay of Fundy during Saturday evening. Model guidance varies on when rain will begin here in northern Maine and it ranges from around midday (GFS model) to as late as 9 to 11 pm Saturday evening (NAM model).
I am going to average the model guidance together and go with rain developing by mid-afternoon Saturday. High temperatures Saturday will be near 53 Degrees, so jackets and sweatshirts will be needed Saturday.
Saturday night through Monday: Low pressure will track into the Canadian Maritimes Saturday night and I expect rain Saturday night. That low pressure system will depart Sunday, however, we will be left with a cool and moist northwest wind flow, so I expect showers on Sunday with high temperatures only near 48 Degrees. These showers will continue into Sunday night and the airmass may be cold enough for snow showers late Sunday night. That moist northwest wind flow will bring scattered showers Monday afternoon with high temperatures Monday near 48 Degrees.
Today: Widespread showers this morning, then widespread showers and isolated thunderstorms this afternoon. Highs near 63 Degrees. Winds South 10 to 20 mph.
Tonight: Mostly cloudy with scattered showers before midnight, then partly cloudy after midnight. Lows near 38 Degrees. Winds West 15 to 20 mph with gusts to 30 mph.
Friday: Partly sunny. Highs near 52 Degrees. Winds Northwest 15 to 20 mph with gusts to 30 mph.
Friday night: Partly cloudy. Lows near 35 Degrees. Winds Northwest 10 to 15 mph before midnight and Northwest around 5 mph after midnight.
Saturday: Mostly cloudy in the morning into early afternoon, then rain developing by mid-afternoon and continuing through the late afternoon and evening hours. Highs near 53 Degrees. Winds Northwest around 5 mph in the morning and South around 5 mph in the afternoon.
Saturday night: Rain. Lows near 36 Degrees.
Sunday: Showers. Highs near 48 Degrees.
Sunday night: Mostly cloudy with scattered rain showers before midnight, then mostly cloudy with scattered snow and rain showers after midnight. Lows near 33 Degrees.
Monday: Partly sunny in the morning, then variable clouds with scattered rain showers in the afternoon. Highs near 48 Degrees.
Prepared by Rob and Meg Lightbown, Crown Weather Services
Disclaimer: All forecasts herein are made to the best ability of the forecaster. However, due to standard forecasting error, these forecasts cannot be guaranteed. Any action or inaction taken by users of this forecast is the sole responsibility of that user.