St. John Valley weather for Dec. 4-10, 2019
976-millibar low pressure is moving towards Newfoundland this morning after bringing snowfall to the region last evening. A weak ridge of high pressure will build across the Valley today with partly cloudy skies expected. A cold front will approach with increased clouds this afternoon and mostly cloudy skies developing tonight. The front will move across the region Thursday with mostly cloudy skies and a chance for snow showers, mainly in the afternoon and evening. Little accumulation is anticipated from this system. Snow showers will linger into the overnight hours Thursday night before tapering off in the predawn hours Friday. A weak area of low pressure will track through southern New England Friday with mostly cloudy skies and a slight chance for snow for the Saint John Valley.
Wednesday, 4 December
Partly cloudy in the morning then becoming partly sunny in the afternoon with a high in the low 30s. West winds near 5 mph. Tonight, mostly cloudy with a slight chance for snow showers after midnight. Low in the middle 10s with south/southwest winds near calm shifting to the west after midnight.
Thursday, 5 December
Mostly cloudy with a 30 percent chance for snow showers, mainly in the afternoon and evening. Little precipitation/accumulation expected. High in the low 30s with northwest winds 0 to 5 mph. Thursday night, mostly cloudy with a 20 percent chance for snow showers. Low in the upper 10s with west/northwest winds around 5 to 8 mph.
Friday, 6 December
Mostly cloudy with a slight chance for precipitation. High in the middle 20s with west winds 5 to 10 mph. Friday night, partly cloudy with a low in the lower 10s and a slight chance for snow. Northwest winds 0 to 7 mph.
High pressure builds in with partly cloudy skies Saturday afternoon which continue through Sunday morning. Clouds increase Sunday afternoon as a front approaches from the west/northwest. Snow is possible Sunday night into Monday morning before changing to or mixing with rain. Tuesday’s weather is still uncertain; however, there is a chance for significant rain and/or freezing rain/sleet which could create travel and water-related issues across the Valley. However, given model uncertainty at present, this scenario will bear monitoring.
Sat. Dec. 7: upper 10s / 0 to 5 above
Sun. Dec. 8: upper 20s / low 20s
Mon. Dec. 9: mid-30s / low 30s
Tue. Dec. 10: mid-30s / low 20s
Longer-range Trends Wed. Dec. 11 – Tue. Dec. 17
Slightly below normal temperatures and 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.