Wednesday – Friday
High pressure will build across the Valley today with mostly clear to partly cloudy skies, though smoke-haze from Canadian wildfires will be present. Conditions will be hot and muggy with only a slight chance of an isolated shower or thunderstorm thanks to a weak trough aloft this afternoon. However, high-resolution forecast models are not showing any significant activity today in comparison to yesterday.Highs today reach the low 90s. Tonight, mostly clear skies become partly cloudy after midnight as a cold front approaches from the west/northwest with an increased chance of showers after midnight. Lows in the mid-60s are anticipated overnight.
Mostly cloudy skies overspread the SJV Thursday with a chance of showers and thunderstorms, especially in the afternoon. While severe weather is not currently anticipated, due to ample moisture aloft, any thunderstorms will be capable of producing locally heavy downpours along with gusty storm winds. The Weather Predication Center has the region at marginal risk for localized flash flooding. Highs Thursday reach the mid-80s. Thursday night, expect showers and isolated thunderstorms with lows in the upper 50s.
High pressure brings drier air into the SJV Friday with skies becoming mostly sunny. Highs will be in the middle 70s with lower dewpoints creating more comfortable conditions across the region. Friday night, mostly clear skies with lows in the lower 50s are expected.
Saturday – Tuesday
High pressure remains across the region Saturday with mostly sunny skies and highs in the upper 70s/low 80s. Partly cloudy skies develop Saturday night as low pressure and a frontal system approach with increasing chances of rain. Lows fall into the middle 50s.
Sunday into Monday, a cold front looks to approach and cross the area with partly sunny/partly cloudy skies and a chance of rain by Sunday afternoon along with isolated thunderstorms; the timing and strength of the front are still uncertain, however.
A chance of showers continues Sunday night into early Monday. High pressure will build into the region later Monday into Tuesday with dry conditions and mostly sunny to partly cloudy skies.
Daily Forecast
Today: Sunny, hazy. Isolated showers this afternoon. Hot with highs in the upper 80s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 20 percent.
Tonight: Hazy in the evening. Partly cloudy with isolated showers in the evening, then mostly clear after midnight. Lows in the mid 60s. Southwest winds around 5 mph. Chance of rain 20 percent.
Thursday: Partly sunny with a chance of showers and thunderstorms in the morning, then cloudy with showers with thunderstorms likely in the afternoon. Some thunderstorms may produce gusty winds and heavy rainfall in the afternoon. Humid with highs in the lower 80s. Temperature falling into the mid 70s in the afternoon. South winds around 5 mph. Chance of rain 90 percent.
Thursday Night: Showers. Thunderstorms likely, mainly in the evening. Patchy fog. Some thunderstorms may produce gusty winds and heavy rainfall in the evening. Humid with lows in the upper 50s. Southwest winds 5 to 10 mph. Chance of rain 90 percent.
Friday: Mostly sunny. A chance of showers in the morning. Not as warm. Less humid with highs in the lower 70s. Northwest winds 5 to 10 mph with gusts up to 25 mph. Chance of rain 50 percent.
Friday Night: Mostly clear. Lows around 50.
Saturday: Mostly sunny. Highs in the mid 70s.
Saturday Night: Partly cloudy in the evening, then becoming mostly cloudy. Lows in the mid 50s.
Sunday: Partly sunny with a chance of showers. Highs in the mid 70s. Chance of rain 50 percent.
Sunday Night: Mostly cloudy with a chance of showers in the evening, then partly cloudy after midnight. Lows in the upper 40s. Chance of rain 40 percent.
Monday: Sunny. Highs in the lower 70s.
Monday Night: Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 40s.
Tuesday: Mostly sunny. Highs in the upper 70s.
Tuesday Night: Partly cloudy with a slight chance of rain showers. Lows in the mid-50s. Chance of precipitation is 20 percent.
Note: Computer model precision diminishes as the week progresses. Check The County.me or the National Weather Service Caribou, ME at for weather updates with more current information for the Saint John Valley.
The Week Ahead is the work of UMFK Professor Joseph E. Becker based on personal weather station data, various computer forecast models, and information that the National Weather Service, NOAA, and other weather resources provide.
