Wednesday-Friday
A partly sunny and chilly day is on tap for the St. John Valley today as weak high pressure builds across the region. Clouds increase as this evening as a disturbance crosses the state with an area of low pressure forming near the Downeast coast this evening. The disturbance may produce a few snow showers over the Valley tonight.
An upper trough will remain over the region Thursday with a closed low developing to the east in the Maritimes, producing partly sunny to mostly cloudy skies over the Valley Thursday with a slight chance of isolated snow showers. Partly cloudy and cold conditions are expected Thursday night.
Skies will remain partly sunny to mostly cloudy and breezy as the Maritime low retrogrades westward Friday into Saturday. Highs are expected in the low to mid-30s with overnight temperatures in the low 20s for the period.
Saturday-Tuesday
A low pressure system both at the surface and higher aloft will move slowly westward across Québec this weekend. Saturday will stay dry and partly sunny, but clouds will increase Saturday evening as another low pressure system approaches from the Great Lakes. Chances of snow will increase late Saturday night.
On Sunday, forecast models are still uncertain about exactly where the new storm system will form. Some models (like the European model) suggest it will redevelop over the Gulf of Maine and move east across Nova Scotia Sunday night. Others (like the GFS and Canadian models) show it forming closer to the Downeast Maine coast and moving quickly through the Canadian Maritimes.
Even with these differences, confidence is high that most of the area will see some form of precipitation Sunday into Sunday night. Northern areas are likely to get snow, while central and Downeast areas could see either rain or snow depending on the storm’s exact track.
By Monday, the storm should move off to the northeast. Skies will stay mostly cloudy with a chance of lingering snow showers and a gusty northwest wind. Tuesday looks calmer and dry with winds shifting more westerly. Highs in the low to middle 30s with overnight low in the lower to middle 20s for the period.
Daily Forecast Outlook
Today: Partly sunny. Highs in the mid-30s. West winds 10 to 15 mph with gusts up to 30 mph.
Tonight: Mostly cloudy. A slight chance of snow showers in the evening. Lows in the lower 20s. Southwest winds around 5 mph with gusts up to 15 mph in the evening, becoming light and variable. Chance of snow 20 percent.
Thursday: Mostly cloudy. A slight chance of snow showers in the afternoon. Highs in the mid 30s. Northeast winds around 5 mph. Chance of snow 20 percent.
Thursday Night: Mostly cloudy with a 20 percent chance of snow showers. Lows around 19. North winds around 5 mph.
Friday: Partly sunny. Highs in the lower 30s. Northwest winds 5 to 10 mph with gusts up to 20 mph.
Friday Night: Mostly cloudy in the evening, then becoming partly cloudy. Lows around 20.
Saturday: Partly sunny. Highs in the lower 30s.
Saturday Night: Partly cloudy in the evening, then mostly cloudy with a chance of snow showers after midnight. Lows around 20. Chance of snow 40 percent.
Sunday: Mostly cloudy. A chance of snow showers in the morning, then snow likely in the afternoon. Highs in the mid-30s. Chance of snow 70 percent.
Sunday Night: Snow likely. Lows in the mid-20s. Chance of snow 70 percent.
Monday: Cloudy. Snow likely, mainly in the morning. Highs in the mid-30s. Chance of snow 70 percent.
Monday Night: Mostly cloudy with a 50 percent chance of snow. Lows in the mid-20s.
Tuesday: Mostly cloudy. Highs in the mid-30s.
Tuesday Night: A slight chance of snow before 3am. Mostly cloudy, with a low around 26.
Weather Notice: The weekly forecast is by UMFK Professor Joseph E. Becker based on available computer models and data and may not reflect current conditions or later forecast updates. Check The County.me or the National Weather Service Caribou, Maine for the most recent weather information for the Saint John Valley.
