St. John Valley weather for April 10-16, 2019
A weak area of low pressure will move from western Maine into the Gulf Wednesday. A trough axis behind the low will keep a chance for snow showers Wednesday morning with a mix of snow/rain showers Wednesday afternoon across the region. There is little moisture associated with this system and aside from considerable cloudiness, no accumulations are expected. Low pressure will move eastwards as the day progresses with high pressure centered near the southern Hudson Bay building in from the northwest Wednesday night and Thursday and cresting over the Valley Thursday night. A strong low pressure system will develop over the central/southern Plains today and lift towards the Great Lakes Thursday and cross that region Friday.
A warm front ahead of the system will move across the Valley Friday into Saturday followed by an occluded front Saturday. This will produce rain across the Valley Friday afternoon into Saturday morning. Rain continues into Saturday morning then tapers to showers Saturday afternoon. Clouds diminish over the course of the day Saturday as high pressure to the northwest in Canada briefly moves into the Valley Saturday night and Sunday. Low pressure approaches from the Ohio Valley Sunday night and moves into the Gulf of Maine Monday night bringing a chance for rain/snow Monday morning and rain Monday afternoon tapering to rain/snow showers Monday night. Showers linger Tuesday afternoon and evening with snow/snow showers possible depending on the low’s track.
Daily Weather Summary
Wednesday, April 10
Mostly cloudy with a 30 percent chance for snow showers in the morning and a slight chance for rain/snow showers in the afternoon. High in the upper 30s with a northwest wind 5 to 10 mph. Overnight, mostly cloudy with a low in the mid-20s. Northwest wind near 5 mph.
Thursday, April 11
Partly cloudy to mostly clear with a high in the mid-40s. Northwest wind 5 to 10 mph. Thursday night, mostly clear to partly cloudy with a low in the lower 20s. Northwest wind near calm overnight.
Friday, April 12
Partly cloudy early with increasing clouds over the course of the day. Rain showers possible in the afternoon becoming a steadier rain in the evening. Chance for precipitation 60 percent with around one-hundredth inch expected by evening. High in the mid-40s with south/southeast wind 0 to 5 mph. Friday night, cloudy with an 80 percent chance for rain. Low in the mid-30s. South wind 0 to 7 mph.
Saturday, April 13
Cloudy in the morning with decreasing clouds as the day progresses. High in the mid-50s with a 40 percent chance for rain in the morning tapering to showers in the afternoon. Saturday night, partly cloudy with lows in the mid-30s. West wind 8 to 14 mph.
Sunday, April 14
Partly cloudy in the morning then partly cloudy/sunny in the afternoon. High in the mid-40s. Chance for rain showers 20 percent. West wind 8 to 14 mph. Sunday night, partly cloudy with a 30 percent chance for rain/snow. Low in the lower 30s. North wind 0 to 7 mph.
Monday, April 15
Becoming cloudy with a 60 percent chance for morning snow changing to rain in the afternoon. High in the mid-40s with east wind 8 to 14 mph. Monday night, cloudy with a 60 percent chance for rain/snow showers. Low in the lower 30s with northeast wind 8 to 14 mph.
Tuesday, April 16
Cloudy with a 40 percent chance for morning snow showers and afternoon rain showers. High in the low 40s. North wind 8 to 14 mph. Tuesday night, cloudy with a 40 percent chance for rain showers then snow showers overnight. Low in the lower 30s. North/northwest wind 8 to 14 mph.
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.