Today and Tonight: High pressure now located just north of the Great Lakes will build into northern Maine today. Low-level moisture across northern Maine are keeping our skies cloudy early this morning and skies are expected to remain mostly cloudy throughout this morning with partly sunny skies anticipated for this afternoon. High temperatures today will be near 28 Degrees.
A cold front will cross northern Maine sometime after midnight tonight and will be accompanied by mostly cloudy skies along with a slight chance for a snow flurry. Low temperatures tonight will be near 10 Degrees.
Friday: High pressure is forecast to move in behind this cold front and provide the area a fresh batch of Canadian air for Friday; however, the core of the cold air will move to our north over Labrador and our area will be in an area with weak cold air advection. One uncertainty with Friday morning’s forecast is how long will the clouds linger behind the front. Model guidance has us cleared out by 7 am Friday morning, so I will go with sunny skies throughout Friday with high temperatures near 23 Degrees.
Saturday through Sunday: High pressure will give the area a nice weekend with sunny to partly sunny skies expected both on Saturday and Sunday. High temperatures Saturday will be near 20 Degrees and high temperatures Sunday will be near 25 Degrees. This high pressure system is also expected to bring some fairly cold low temperatures Saturday night along with clear to partly cloudy skies. Low temperatures will range from around 10 Below Zero from Houlton to Presque Isle to Caribou to near 15 Below Zero up in Allagash and the St. John Valley.
Sunday night through Monday night: Temperatures are expected to initially fall into the teens early Sunday night, but are expected to rise into the 20s after midnight Sunday night as a strong southerly wind flow develops ahead of low pressure in the Great Lakes region. In addition, strong warm air advection will occur Sunday night through Monday as this low pressure system is forecast to take a track up the Saint Lawrence River and then to the north of Maine.
Snow is expected to develop across northern Maine after midnight Sunday night and continue into early Monday morning. A couple of inches or so of snow is currently expected late Sunday night into early Monday morning, however, warm air aloft will quickly cause the snow to change to sleet and freezing rain during Monday morning and then to all rain by Monday afternoon. Rain is then expected throughout Monday afternoon. The biggest impact from this storm will likely be the threat for heavy rainfall during Monday afternoon with rainfall amounts of around one inch possible. This heavy rainfall combined with high temperatures Monday in the upper 30s to low 40s will likely cause our snowpack to diminish significantly and raise the threat for street and possibly small stream flooding.
The rain will come to an end Monday evening with temperatures anticipated to remain above freezing Monday night along with cloudy skies.
Tuesday through Wednesday: A cloudy and mild day is expected on Tuesday ahead of an arctic cold front that is poised to affect our area Tuesday night and Wednesday. There is model disagreement on whether an area of low pressure will develop along this arctic front Tuesday night. The GFS model says no and forecasts that the arctic front will be accompanied by snow shower activity; meanwhile the European and to some extent the Canadian model says yes and forecasts that an area of low pressure will track right over northern Maine causing a period of light to perhaps moderate snow to accumulate late Tuesday night through Wednesday.
Based on the European model’s excellent track record this winter, I will lean towards its solution and go with light snow for later Tuesday night through Wednesday. Subfreezing temperatures by Tuesday night and Wednesday will cause slush and standing water from the January thaw to freeze potentially creating some very slippery driving and walking conditions.
Today: Mostly cloudy this morning, then partly sunny this afternoon. Highs near 28 Degrees. Winds Northwest 5 to 10 mph.
Tonight: Mostly cloudy with a slight chance for a snow flurry or two. Lows near 10 Degrees. Winds West 5 to 10 mph.
Friday: Sunny. Highs near 23 Degrees. Winds Northwest around 10 mph.
Friday night: Clear to partly cloudy. Lows Zero to 5 Below Zero. Winds Northwest 5 to 10 mph.
Saturday: Partly sunny. Highs near 20 Degrees. Winds Northwest 5 to 10 mph.
Saturday night: Clear to partly cloudy. Lows 10 to 15 Below Zero.
Sunday: Sunny. Highs near 25 Degrees.
Sunday night: Increasing clouds before midnight, then snow after midnight. Early nighttime low temperatures 10 to 15 Degrees with temperatures rising into the 20s after midnight.
Monday: Snow changing to freezing rain and sleet during the morning and then to all rain by midday, then rain, heavy at times, during the afternoon. Windy with high temperatures in the upper 30s to low 40s.
Monday night: Rain ending during the evening, then cloudy overnight. Lows near 35 Degrees.
Tuesday: Cloudy. Highs near 38 Degrees.
Tuesday night: Cloudy before midnight, then light snow after midnight. Lows 15 to 20 Degrees.
Wednesday: Light snow. Highs near 20 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.