St. John Valley weather for April 6-12, 2022
3-Day Outlook: Wednesday – Friday
High pressure will be centered over the region today into the evening hours bringing plenty of sunshine and dry conditions to the St. John Valley. Skies will become partly cloudy tonight as an occluded front approaches from a large low-pressure system over the Great Lakes.
Partly cloudy skies Thursday morning will become increasingly cloudy in the afternoon as the front moves closer to the region with a slight chance for precipitation by the late afternoon period. A secondary low pressure area will form along the mid-Atlantic coast and move into southern New England Thursday night. A rain/snow mix is expected to overspread the Valley Thursday evening, continuing into the overnight hours. A wintry mix will develop as sleet mixes in early Friday, which may produce a slushy accumulation across far northern Maine, making untreated surfaces slippery.
A wintry mix Friday morning will change to all rain by the afternoon as temperatures warm to the low 40s for most locations. Rain will continue overnight into early Saturday. The National Weather Service in Caribou noted that “melting snow with rainfall potentially in the 0.4-0.6 inch range along with warmer temperatures means ice may begin to break up and move on the St. John, Allagash, and Aroostook Rivers. This will create an increased potential of ice jams on these rivers into the weekend.”
Wednesday, April 6
Sunny with a high around 44 degrees. North wind at 3-5 mph.
Wednesday night, mostly clear with a low around 20 degrees. North wind 2-3 mph in the evening becoming northeast overnight near calm.
Thursday, April 7
Partly cloudy in the morning then becoming mostly cloudy in the afternoon with a 10 percent chance for precipitation in the afternoon. High around 46 degrees. East wind around 6 mph in the morning becoming southeast in the afternoon 9-10 mph.
Thursday night, mostly cloudy with a 90 percent chance for a rain/snow mix in the evening then rain/sleet/snow overnight. Precipitation totals between 1/10 and 1/4 inch. Low near 32 degrees. East wind 10-15 mph.
Friday, April 8
Cloudy with a 90 percent chance for a wintry mix in the morning changing to all rain in the afternoon. Precipitation totals between a quarter and a half-inch expected. High around 40 degrees. East wind 10-15 mph.
Friday night, cloudy with a 70 percent chance for rain. Low near 34 degrees. South wind 0-7 mph.
4- to 7-Day Outlook: Saturday-Tuesday
An upper-level low will move across the Valley Saturday into Sunday with morning rain/snow showers changing to just rain showers Saturday afternoon and evening. Snow will mix back in overnight into Sunday morning with precipitation tapering to rain showers Sunday afternoon into the evening before tapering off as snow showers early Monday as the upper low slowly moves across the region.
Monday will feature partly sunny skies with decreased cloudiness Monday night. Partly cloudy skies are expected Tuesday with increasing clouds later in the day as a warm front ahead of a low pressure area near the Great Lakes lifts towards the SJV.
NWS Caribou notes in their hydrology discussion that the “potential exists for 0.4 to 0.6 inch of rain into near ‘ripe’ or very ‘ripe’ snowpack — meaning any rainfall will not be absorbed and will result in water release from the snowpack. This combined with temperatures this weekend in the mid-to-upper 40s will likely result in ice movement. As the ice rots, breaks up expect an increased potential of ice jams especially on the Aroostook, Allagash and St. John rivers starting this weekend into next week.”
Saturday, April 9
Mostly cloudy to partly sunny with a 40 percent chance for rain and snow showers in the morning then rain showers in the afternoon. High around 49 degrees. Southwest wind 0-7 mph.
Saturday night, partly cloudy with a 40 percent chance for showers mixing with snow showers after midnight. Low near 33 degrees. Northeast wind 0-7 mph.
Sunday, April 10
Mostly cloudy with a 30 percent chance for rain and snow showers in the morning then rain showers in the afternoon. High around 44 degrees. Northwest wind 0-7 mph.
Sunday night, partly cloudy with a low near 32 degrees. 20 percent chance for rain showers in the evening changing to snow showers overnight. Northwest wind 0-7 mph.
Monday, April 11
Partly sunny with a high around 44 degrees. Northwest wind 8-14 mph.
Monday night, partly cloudy with a 5 percent chance for precipitation. Low around 32 degrees. Northwest wind 0-7 mph.
Tuesday, April 12
Partly cloudy with a 10 percent chance for precipitation. High around 48 degrees. West wind 0-7 mph.
Tuesday night, partly cloudy with a 10 percent chance for rain/snow showers. Low near 32 degrees. West wind 0-7 mph.
8- to 14-Day Trends: Wednesday, April 13-Tuesday, April 19
Above normal temperatures / 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.