Apex Weather

St. John Valley weather for Dec. 15-21, 2021

Apex Wx Three-Day Outlook: Wednesday-Friday

High pressure to the northwest this morning will slide into the Gulf of Maine this afternoon then drift eastwards tonight. 

Meanwhile, a low developing over the Plains will track across the western Great Lakes tonight into Thursday lifting a warm front across the SJV.  The low will head towards James Bay in Canada tomorrow drawing a cold front across the region Thursday night. Precipitation will wind down early Friday as high pressure builds in from the west on blustery winds and decreasing cloudiness.

Today and tonight

Partly cloudy in the morning then increasing clouds in the afternoon with a high near 23 degrees with northwest winds at 4 mph becoming south-southeast at 2 mph in the afternoon/evening.

Tonight, cloudy with a low around 19 degrees. 90 percent chance for snow with between 0.10 and 0.25-inch precipitation with around 1-inch snow accumulation expected. Southeast winds at 5 mph.

Thursday, Dec. 16

Cloudy with a chance for snow early changing to a wintry mix in the morning then changing to rain in the afternoon. 80 percent chance for precipitation with between 0.01 and 0.09-inch precipitation expected. Less than 1-inch snow accumulation expected. High in the evening near 40 degrees with south winds 5-8 mph.

Thursday night, mostly cloudy with decreased cloudiness after midnight. 40 percent chance for rain showers tapering off after midnight. Patchy fog in the evening. Precipitation totals less than 0.10-inch. Low near 34 degrees. South winds winds 6-8 mph in the evening becoming southwest after midnight increasing to 8-14 mph. 

Friday, Dec. 17

Mostly cloudy in the morning then partly sunny in the afternoon and blustery. 10 percent chance for precipitation in the morning. High near 36 degrees with temperatures falling through the afternoon. West winds 10-15 mph gusting to around 25 mph.

Friday night, partly cloudy with a 5 percent chance for precipitation. Low near 17 degrees with west winds 8-14 mph.
Apex Wx four- to seven-day outlook: Saturday-Tuesday

High pressure will bring chilly temperatures and partly cloudy skies Saturday. Clouds increase Saturday night as a low pressure area tracks from the Ohio Valley off the Mid-Atlantic bringing a chance for some snow to the Valley Sunday morning into the afternoon. High pressure builds in on breezy northwest winds Monday followed by increased cloudiness Tuesday as a weak clipper touches the Crown of Maine.

Saturday, Dec. 18

Partly cloudy with a 10 percent chance for snow in the afternoon. High around 23 degrees. Northwest winds 0-7 mph.

Saturday night, mostly cloudy with a 20 percent chance for snow. Low near 11 degrees. North winds 0-7 mph.

Sunday, Dec. 19

Mostly cloudy with a 20 percent chance for snow tapering off in the afternoon. High near 21 degrees. North winds 0-7 mph.

Sunday night, becoming partly cloudy with a with a low near 5 degrees. Northwest winds 8-14 mph.

Monday, Dec. 20

Partly cloudy with a 5 percent chance for precipitation. High around 17 degrees. Northwest winds 8-14 mph.

Monday night, partly cloudy in the evening with increasing clouds overnight. 10 percent chance for snow. Low near 7 degrees. Southwest winds 0-7 mph.

Tuesday, Dec. 21 / Winter Solstice at 10:59 am ET

Mostly cloudy with a 10 percent chance for precipitation. High near 22 degrees. West winds 8-14 mph.

Tuesday night, partly cloudy with a 10 percent chance for precipitation. Low near 5 degrees. Northwest winds 8-14 mph.

Climate Prediction Center eight- to 14-day trends

Wednesday, Dec. 22 – Tuesday, Dec. 28
Below 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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