Apex Weather

St. John Valley weather for Nov. 17-23, 2021

 

Three-Day Outlook: Wednesday – Friday

Partly cloudy skies this morning give way to increasingly cloudy skies in the afternoon as a warm front approaches. Skies become cloudy tonight with snow overspreading the region. Overnight lows occur around midnight with temperatures rising overnight. 

As warmer air moves into the region, snow mixes with sleet then changes to freezing rain by Thursday morning. Depending on timing of the transition, snow may persist longer over the SJV. Precipitation is expected to change to all rain by Thursday afternoon with rain continuing overnight into Friday. Rain and snow showers persist into Friday afternoon behind the cold front with snow showers possible overnight into Saturday morning.

Today and tonight

Partly cloudy in the morning then becoming partly sunny to mostly cloudy in the afternoon with a 10 percent chance for precipitation. High around 35 degrees. Northwest winds 5-9 mph shift to the southeast around 2 mph in the evening.

Wednesday night, cloudy with a 100 percent chance for snow mixing with sleet after midnight then changing to freezing rain early Thursday. Patchy fog possible. Low near 27 degrees. Precipitation totals in the 0.10 to 0.25-inch range. 1-3 inches snowfall possible. Southeast winds 5-8 mph. 

Thursday, Nov. 18

Cloudy with a 100 percent chance for freezing rain in the morning changing to rain by the afternoon. Precipitation totals in the 0.10 to 0.25-inch range. High around 43 degrees with southerly winds 5-9 mph.

Thursday night, cloudy with a 90 percent chance for rain mixing with snow early Friday. Precipitation totals in the 0.10 to 0.25-inch range. Low near 35 degrees with southwest winds 4-5 mph shifting to the west overnight. 

Friday, Nov. 19

Mostly cloudy in the morning with rain / snow showers. 50 percent chance for precipitation with between 0.01 and 0.09-inch expected. High near 38 degrees. West winds 9-10 mph.

Friday night, partly cloudy with a low near 23 degrees. 20 percent chance for snow showers. West winds 8-14 mph.

Days 4 to 7: Saturday – Tuesday

High pressure builds across the Valley Saturday with decreasing cloudiness and snow/snow showers tapering off. Partly cloudy skies persist into Sunday morning with increasing clouds in the afternoon as a strong upper-trough approaches from the Great Lakes. This system is expected to develop into a cut-off upper low and affect the Northeast US through the late week period with rain and snow. The location and speed of the system will determine precipitation types and amounts.

Saturday, Nov. 20

Partly sunny in the morning then partly cloudy with a high around 35 degrees. West winds 0-7 mph.

Saturday night, partly cloudy with a low near 19 degrees. South winds 0-7 mph.

Sunday, Nov. 21

Partly cloudy in the morning then becoming mostly cloudy in the afternoon. 5 percent chance for precipitation. High around 39 degrees with south winds 0-7 mph.

Sunday night, partly cloudy with a low near 29 degrees. 40 percent chance for snow. South winds 0-7 mph.

Monday, Nov. 22

Mostly cloudy with a 70 percent chance for a snow/rain shower mix in the morning then rain in the afternoon. High near 43 degrees. Southeast winds 8-14 mph.

Monday night, mostly cloudy with a 70 percent chance for rain. Low around 34 degrees. Southeast winds 8-14 mph.

Tuesday, Nov. 23

Mostly cloudy with rain likely,  mixing with snow in the afternoon. High around 43 degrees. North winds 8-14 mph.

Tuesday night, mostly cloudy with a 60 percent chance for rain/snow. Low around 35 degrees. North winds 8-14 mph.

Eight- to 14-day trends: Wednesday, Nov. 24 – Tuesday, Nov. 30
Near normal temperatures / Near 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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