11/13/14: The Coldathon Continues

Temperatures across the northern plains were quite cold this morning.  The 7:00 AM temperatures are presented below with statewide average temperatures of -13.3° in Wyoming and -8.5° in Montana.  North Dakota’s average temperature was 6.7° per the RTMA’s (Real Time Meso Analysis) data.  Very impressive cold for the middle of November.

 

rtma_tmp2m_nplains.

Arctic high pressure is centered just to the west of North Dakota.  It has been cloud cover in western North Dakota and cloud cover plus a persistent wind that has been keeping temperatures “up” to some degree over the state.  The locations that recorded the more significant snowfall on Monday will still have teens below potential if we can maintain a clear sky for an entire night.

6:00 AM Surface Analysis

6:00 AM Surface Analysis

 

Hettinger did drop to -10° F this morning before cloud came in and then temperatures rose to around 0° for the wake up temperature.

11/13/14 minimum air temperature

11/13/14 minimum air temperature

There are no signs that this pattern will be breaking down anytime soon.  Although the cold will stick around there will be some subtle day to day differences, basically dealing with any possible moisture.  In the short term there will be a couple of light snow threats.  One will come on Saturday but indications for the past few days has been that the snow chances will be mainly confined to South Dakota and southern Minnesota that day.  Totals will probably range in the 1-3″ category with most locations just receiving an inch or two.  On Sunday, there will be another reinforcing push of cold air across the upper Midwest and the corresponding cold front will likely trigger some light snow on Sunday that looks to be bringing an inch or less to the eastern one-third of North Dakota and the northern one-third of Minnesota.  Behind that very minor accumulation will come some wind and colder air once again to the region.

At the moment I did not foresee any significant change to the temperature regime in the region until at least next weekend (November 22-23).

Daryl Ritchison