St. John Valley weather, Aug. 9-16, 2023

Joseph E. Becker, Special to The County
10 months ago

Wrap-around moisture from the departing low pressure system will bring a chance for isolated to scattered showers today. Cloudy skies in the morning becoming mostly cloudy in the afternoon with breezy northwest wind across the region with gusts up to 25 mph possible. Partly cloudy skies develop Wednesday night as high pressure builds into the region. Patchy fog is possible overnight.

Another cold front approaches Thursday with partly cloudy skies in the morning becoming increasingly cloudy in the afternoon. Rain and some embedded thunderstorms late Thursday night into Friday morning might be heavy in some areas. Given that the ground is already saturated, some localized flash flooding may be possible.

Friday, an occluded front and associated triple-point low will lift north of the area around mid-to-late morning. Low clouds, showers and some drizzle will likely linger Friday across the SJV as an upper low swings over the area. Clouds decrease in the afternoon with a chance for showers overnight into Saturday.

Daily Summary

Today: Scattered showers, mainly before 5 p.m. Areas of fog before 9 a.m. Otherwise, cloudy, with a high near 67. Northwest wind 6 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 40 percent.

Tonight: Patchy fog after 1 a.m. Otherwise, mostly cloudy, with a low around 56. West wind 7 to 11 mph, with gusts as high as 22 mph.

Thursday: A slight chance of showers, then a chance of showers and thunderstorms after 4 p.m. Mostly sunny, with a high near 79. Northwest wind around 8 mph becoming southwest in the afternoon. Chance of precipitation is 30 percent.

Thursday Night: Showers and thunderstorms likely before 3 a.m., then showers between 3 a.m. and 5 a.m., then showers and possibly a thunderstorm after 5 a.m. Patchy fog before 1 a.m., then patchy fog after 2 a.m. Low around 60. Southeast wind around 6 mph. Chance of precipitation is 80 percent. New rainfall amounts between a quarter and half of an inch possible.

Friday: Showers and possibly a thunderstorm. Patchy fog before 9 a.m. High near 69. Southeast wind 6 to 9 mph becoming west in the afternoon. Chance of precipitation is 80 percent. New rainfall amounts between three quarters and one inch possible.

Friday Night: A chance of showers, mainly before 10 p.m. Mostly cloudy, with a low around 55. West wind around 9 mph. Chance of precipitation is 40 percent. 

4- to 7-Day Outlook: Saturday, Aug 12 – Tuesday, Aug. 15

Partly sunny skies are expected Saturday with increasing clouds later in the day as another low approaches with showers possible overnight under mostly cloudy skies. The low tracks just to the northwest Sunday with showers and isolated thunderstorms likely, especially in the afternoon. A cold front trailing from the low moves through the Valley Sunday night with scattered showers continuing across the SJV. 

High pressure briefly builds in Monday with a slight chance for showers and isolated afternoon thunderstorms. Yet another low pressure system approaches later Monday with scattered showers overspreading the Valley Monday night. Showers and isolated afternoon thunderstorms are expected Tuesday as an occluded front moves across the area. Showers are possible Tuesday night into Wednesday.

Daily Summary

Saturday: Partly sunny, with a high near 77. West wind 8 to 10 mph.

Saturday Night: A chance of showers, mainly after 1 a.m. Patchy fog before 1 a.m., then patchy fog after 2 a.m. Otherwise, mostly cloudy, with a low around 58. Chance of precipitation is 40 percent.

Sunday: A chance of showers before noon, then a chance of showers and thunderstorms between noon and 1 p.m., then showers likely and possibly a thunderstorm after 1 p.m. Patchy fog before 7 a.m. Otherwise, mostly cloudy, with a high near 76. Chance of precipitation is 60 percent.

Sunday Night: Showers likely, mainly before 7 p.m. Patchy fog between 11 p.m. and 1 a.m. Otherwise, mostly cloudy, with a low around 60. Chance of precipitation is 60 percent.

Monday: A slight chance of showers and thunderstorms. Partly sunny, with a high near 77. Chance of precipitation is 20 percent.

Monday Night: A chance of showers. Patchy fog. Otherwise, mostly cloudy, with a low around 58. Chance of precipitation is 30 percent.

Tuesday: Showers and thunderstorms likely. Patchy fog. Otherwise, mostly cloudy, with a high near 74. Chance of precipitation is 60 percent.

Tuesday Night:  A chance of showers. Partly cloudy, with a low around 58. Patchy fog. Chance of precipitation is 40 percent.

8- to 14-Day Trends: Wednesday, Aug. 16 – Tuesday, Aug. 22 

Above normal temperatures / Above normal precipitation 

Note: Computer model precision diminishes the further into the week the forecast projects. Check The County.me or the National Weather Service, Caribou 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.