St. John Valley weather for Aug. 16-22, 2023

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

3-Day Outlook: Wednesday, Aug. 16 – Friday, Aug. 18

Mostly cloudy skies are expected this afternoon as an upper-trough moves across the region bringing some scattered showers to the Valley and isolated afternoon thunderstorms generally west of Highway 11. The trough moves away tonight with high pressure building in overnight into Thursday. Partly cloudy skies with isolated showers are expected in the evening. Patchy fog is possible overnight.

A weak ridge of high pressure builds in Thursday with partly sunny to partly cloudy skies across the area. Partly cloudy skies Thursday night give way to mostly cloudy skies Friday as a cold front approaches with a chance for showers in the morning and showers with isolated thunderstorms Friday afternoon into Friday night. 

Daily Summary

This Afternoon: Scattered showers, with thunderstorms also possible after 5 p.m. Mostly cloudy, with a high near 74. South wind around 7 mph. Chance of precipitation is 40 percent.

Tonight: Scattered showers and thunderstorms before 7 p.m., then isolated showers between 7 p.m. and 9 p.m. Patchy fog before 1 a.m., then patchy fog after 2 a.m. Otherwise, mostly cloudy, with a low around 61. South wind around 6 mph. Chance of precipitation is 30 percent.

Thursday: Mostly cloudy, with a high near 77. South wind 6 to 10 mph.

Thursday Night: Mostly cloudy, with a low around 63. Southeast wind around 7 mph.

Friday: A chance of showers, then showers and possibly a thunderstorm after 2 p.m. High near 73. Southeast wind 9 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 80 percent. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday Night: Showers and possibly a thunderstorm before midnight, then showers likely. Patchy fog. Low around 59. South wind around 6 mph. Chance of precipitation is 90 percent. New precipitation amounts between a quarter and half of an inch possible.  

4- to 7-day Outlook: Saturday, Aug. 19 – Tuesday, Aug. 22 

A closed upper low slowly moves across the region Saturday into Saturday evening with morning showers becoming more scattered in the afternoon as the low gradually moves east. As the upper low moves into the Maritimes, partly cloudy skies develop Saturday night with scattered showers possible.

High pressure builds in Sunday with a weak cold front approaching later in the day producing some isolated showers in the afternoon and evening. High pressure to the west is expected to build into the region Monday with partly sunny skies with isolated afternoon showers. Partly cloudy skies Monday night with isolated showers are possible. High pressure moves across the region Tuesday with partly cloudy skies.

Daily Summary

Friday: A chance of showers before 2 p.m., then a chance of showers and thunderstorms between 2 p.m. and 5 p.m., then showers likely and possibly a thunderstorm after 5 p.m. Patchy fog between 7 a.m. and 8 a.m. Otherwise, mostly cloudy, with a high near 75. Southeast wind 8 to 10 mph. Chance of precipitation is 60 percent.

Friday Night: Showers likely and possibly a thunderstorm before 9 p.m., then a chance of showers. Patchy fog after 11 p.m.. Otherwise, mostly cloudy, with a low around 59. Chance of precipitation is 60 percent.

Saturday: A slight chance of showers before 7 a.m., then a chance of showers after 8 a.m. Partly sunny, with a high near 73. Chance of precipitation is 40 percent.

Saturday Night: A chance of showers, mainly before 10 p.m. Partly cloudy, with a low around 58. Chance of precipitation is 30 percent.

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

Sunday Night: A slight chance of showers. Partly cloudy, with a low around 57. Chance of precipitation is 20 percent.

Monday: Mostly sunny, with a high near 73.

8- to 14-day Trends: Wednesday, Aug. 23 –  Tuesday, Aug. 29 

Below 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.