1/15/15: More Dustings

The upper-air disturbance that brought some light snow or even a bit of a mix (rain/sleet) to some locations is now well east of the area.  An area of low pressure that moved across southern Canada yesterday is now near James Bay.  That system has a cold front trailing behind the center of circulation that that front is already shifting the wind to a more northerly direction in northeastern North Dakota and northwestern Minnesota.

 

8:00 AM Surface Analysis
8:00 AM Surface Analysis

That wind shift can be observed via data from the North Dakota Agricultural Weather Network (NDAWN).  The wind is northerly in the Red River Valley as well as into northwestern Minnesota.

8:45 AM Wind Speed and Direction
8:45 AM Wind Speed and Direction

That northerly wind will bring in colder air to eastern North Dakota and northern Minnesota today which will be offset by the normal temperature rises, meaning generally steady temperatures in those locations today.  Plus, the weak cold air advection (horizontal transport of cooler air) will bring in a low cloud deck today as well, meaning a cloudy day for much of at least the eastern one-half of North Dakota into Minnesota.

Projected Wind Speed and Direction at 6:00 PM Thursday, January 15, 2015
Projected Wind Speed and Direction at 6:00 PM Thursday, January 15, 2015

 

The clouds may always contain some flurries otherwise no precipitation is foreseen today or tomorrow, but there will be another clipper system on Friday Night into Saturday.  Ahead of that system a brief warm up, then behind that system a cooling trend once again for Sunday, then a touch warmer Monday ahead of a weak clipper system (weaker than Saturday) then what looks to be a more permanent, long lasting cold snap that will finish off the month of January.

In summary, two more snow events.  Saturday and Monday.  Stronger being Saturday.  Significant cold toward the end of January.  Although the clipper at no big snow producers, any additional accumulation will help lower temperatures for the next Arctic blast for the end of the month.

Daryl Ritchison