Wed. June 24 – Fri. June 26
Low pressure over the Maritimes has a trough axis extending back west over the Saint John Valley along with an approaching upper-level low from the west. These features will combine to keep mostly cloudy skies and the likelihood of afternoon showers and thunderstorms over the region thanks to the instability aloft coupled with daytime heating. Tonight, partly cloudy skies with a chance of showers in the evening and some patchy fog are expected overnight. Another low pressure approaches from the Great Lakes Thursday into Friday and crosses the SJV Friday into Friday night bringing widespread showers along with scattered thunderstorms Friday afternoon. Some strong storms are possible; however, widespread severe weather is not anticipated.
Today, some areas of fog this morning with a 90% chance of showers and a chance of thunderstorms this afternoon. Rainfall accumulation less than 1/10-inch, though higher totals may occur in storms. High topping out in the low 70s with northwest wind 0-5 mph in the morning increasing to 5-10 mph in the afternoon.
Tonight, partly cloudy with a low near 50°F and a 20% chance of showers, mainly in the evening. Less than 1/10-inch rainfall expected. Northwest wind near calm overnight with patchy fog possible.
Mostly cloudy skies Thursday with a 40% chance of mainly afternoon showers and isolated thunderstorms. Rainfall amounts less than 1/10-inch, except in more possible in storms. High in the low-to-mid-70s. North wind early becoming southeast in the afternoon near calm. Thursday night, mostly cloudy with near calm southeast wind. Low in the lower 50s with an 80% chance of showers, especially after midnight. Areas of fog possible overnight.
Friday, cloudy with a near 100% chance of showers and a chance of afternoon thunderstorms. Rainfall totals in the 1/4to 1/2-inch range possible, with higher amounts possible in thunderstorms. High in the mid-to-upper 60s. East-southeast wind 0-5 mph.
Friday night, a chance of showers and isolated thunderstorms with mostly cloudy skies across the region. Temperatures in the low 50s with northeast wind 0-7 mph.
Sat. June 27 – Tue. June 30
Unsettled weather is expected through the weekend, with chances for showers and thunderstorms each day, especially during the afternoon and evening hours. While upper-level ridging aloft and at the surface builds over the Midwest, the Northeast will continue to have weak disturbances moving across the region through Sunday. Drier conditions are expected Monday and Tuesday; however, a chance of afternoon showers and thunderstorms will persist.
Saturday, mostly cloudy skies in the morning become partly sunny as the day progresses with a 40% chance of showers and afternoon thunderstorms. High in the low 70s with light north wind. Saturday night, a 30% chance of showers with partly cloudy skies and a low in the lower 50s. Northwest wind 0-7 mph.
Sunday, partly sunny skies with a 30% chance of showers. High in the mid-to-upper 70s with north wind 0-7 mph. Sunday night, partly cloudy with a 20% chance of showers. Temperatures in the low-to-mid-50s. Northwest wind 0-7 mph.
Monday features partly cloudy to mostly sunny skies with a 20% chance of afternoon showers and thunderstorms.Temperatures reach the upper 70s to near 80°F with northwest wind 0-7 mph. For Monday night, partly cloudy with a 20% chance of showers. Low in the middle 50s. North wind 0-7 mph.
Tuesday, partly cloudy to mostly sunny with a 30% chance of mainly afternoon showers and isolated thunderstorms. High in the upper 70s with southwest wind 0-7 mph. Tuesday night, a chance of showers and thunderstorms in the evening, then a slight chance of precipitation overnight. Low in the mid-50s with west-southwest wind 0-7 mph.
Daily Forecast
Today: Mostly cloudy. Patchy fog this morning. Numerous showers and scattered thunderstorms this afternoon. Thunderstorms may produce small hail this afternoon. Highs around 70. Northwest winds 5 to 10 mph. Chance of rain 70 percent.
Tonight: Mostly cloudy. Scattered showers with isolated thunderstorms in the evening. Patchy fog after midnight. Lows in the upper 40s. Northwest winds around 5 mph. Chance of rain 50 percent.
Thursday: Patchy fog in the morning. Partly sunny with a slight chance of showers in the morning, then mostly cloudy with a chance of showers with a slight chance of thunderstorms in the afternoon. Highs in the lower 70s. North winds around 5 mph, becoming northeast in the afternoon. Chance of rain 40 percent.
Thursday Night: A slight chance of thunderstorms in the evening. Mostly cloudy with a chance of showers. Areas of fog after midnight. Lows in the lower 50s. Southeast winds around 5 mph. Chance of rain 50 percent.
Friday: Areas of fog in the morning. Showers. A chance of thunderstorms in the afternoon. Highs in the mid 60s. Southeast winds around 5 mph. Chance of rain near 100 percent.
Friday Night: Mostly cloudy. Showers with a chance of thunderstorms in the evening, then a slight chance of showers after midnight. Lows in the lower 50s. Chance of rain 90 percent.
Saturday: Partly sunny with a chance of showers. A chance of thunderstorms in the afternoon. Highs in the lower 70s. Chance of rain 50 percent.
Saturday Night: Mostly cloudy in the evening, then becoming partly cloudy. A chance of thunderstorms in the evening. A chance of showers. Lows in the lower 50s. Chance of rain 40 percent.
Sunday: Partly sunny with a chance of showers. Highs in the mid 70s. Chance of rain 40 percent.
Sunday Night: Partly cloudy. A chance of showers in the evening. Lows in the lower 50s. Chance of rain 30 percent.
Monday: Mostly sunny. Highs in the upper 70s.
Monday Night: Partly cloudy. Lows in the mid 50s.
Tuesday: Mostly sunny. A chance of showers in the afternoon. Highs in the upper 70s. Chance of rain 30 percent.
Tuesday Night: Mostly cloudy. A chance of showers and thunderstorms in the evening, then a slight chance of showers and thunderstorms overnight. Chance of rain is 20 percent.
Weather Notice: The weekly forecast, by UMFK Professor Joseph E. Becker, is 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.
