Apex Weather

St. John Valley weather for Jan. 8-14, 2019

Short-Term Outlook

An offshore low pressure will slide towards Newfoundland while another area of low pressure approaches from the west pulling an occluded front across the SJV this afternoon. The western low will phase with the Newfoundland low and intensify producing a strong pressure gradient as high pressure approaches from the Great Lakes.

The ridge of high pressure will bring mostly clear skies Thursday and crest over the area in the evening before moving east Friday. A warm front associated with a low pressure system south of James Bay in Canada will approach the region Friday producing a chance for light snow across the area through the afternoon with snow showers Friday night. A more significant system affects the Valley Saturday with significant ice and snow possible based on current forecast models.

Today & Tonight

Cloudy with a 50 percent chance for snow with less than 0.10 inch precipitation expected. Around 1 inch snow accumulation possible. High in the low 20s. East/southeast winds near calm become northwest in the afternoon increasing to 5 to 10 mph. Wind chill values in the lower 10s. 


Tonight, cloudy with a 40 percent chance for snow showers with little additional accumulation expected (around 0.02 inch precipitation). Low near 5 degrees F with northwest winds increasing to 10-15 mph and gusting to near 25 to 35 mph across the area with highest gusts over elevated terrain and open areas. Areas of blowing snow possible. Wind chill values -10 to -15 degrees F overnight.

Thursday, 9 January

Cloudy/mostly cloudy in the morning then partly cloudy to mostly clear in the afternoon. Cold with a high near 10 degrees F. Northwest winds 10 to 15 mph with gusts 20-30 mph.


Thursday night, partly cloudy with increasing clouds and a 30 percent chance for light snow after midnight. Around 0.01 inch precipitation expected. Low near 0 degrees F with southeast winds 0-5 mph before midnight increasing to 5-10 mph after midnight. Wind chill values near -5 degrees F at times.


Friday, 10 January

Cloudy with a 40 percent chance for snow with around 0.02 inch precipitation anticipated. High in the low 30s with south/southwest winds 5-10 mph. 


Friday night, mostly cloudy with a 40 percent chance for snow showers. Temperatures steady in the lower 30s before rising after midnight. Southwest winds 0-7 mph.


Further Ahead: Saturday – Tuesday

A complex weather arrangement affects Maine Saturday into Sunday. An approaching cold front and southwest flow channel warmer/moister air into the region while high pressure to the northwest channels much colder northerly air behind the front. Meanwhile a coastal low is expected to track along Downeast regions with the result that significant ice and snow accumulations are possible for the entire state. A wintry mix Saturday morning changes to all rain Saturday afternoon/evening then back to a wintry mix after midnight then changing to all snow Sunday morning that continues into the afternoon hours. Depending on where any snowfall banding that occurs, some locations in northern Maine may see over 1 foot of new snowfall by Sunday evening. Snow tapers off Sunday night with high pressure building across the area Monday with partly cloudy/partly sunny skies. Clouds increase Monday night as another system approaches the region with a chance for snow Tuesday.


Medium-Range Highs/Lows

Sat. Jan. 11: low 40s / mid-10s

Sun. Jan. 12: low 20s / near 5 above

Mon. Jan. 13: low 20s / near 10 above

Tue. Jan. 14: mid-20s / low 10s


Long-Range Outlook Wed. Jan 15 – Tue. Jan. 21

Normal temperatures and slightly above normal precipitation

Note: Computer model precision diminishes the further into the week the forecast projects. Check the Fiddlehead Focus for weather updates with more current information.

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.

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