Chilly Weather Is On The Way..
by Kelly Smith, Meteorologist
October 18, 2011 8:49 AM
After an Above Average Start to October, Chilly Temperatures are Making their Return to the Sioux Empire this Week.
A large trough of Low Pressure will set-up mid week in the center of the Continental U.S. This large trough will pull very chilly air all the way from Northern Alberta, Canada south towards South Dakota.
(Tuesday Morning in Edmonton)
The coolest areas will be in northeastern South Dakota as well as south-central Minnesota.
(850mb Temperatures valid 12z Wednesday)
The dark blue outline represents the freezing temperatures line (32 degrees F, 0 degrees C), while the light blue line represents the -6 degree's celsius (21 degrees F) isotherm (line of constant temperature). The inside blue circle represents the coldest air to make it south at -8 degree's celsius (17 degree's F). The coldest air stays into central Minnesota, but the entire eastern part of South Dakota, will see very chilly weather. 
(Surface winds, dewpoints valid 12z Wednesday)
On top of very chilly surface temperatures, a brisk North wind will make it feel pretty cold, especially compared to the warm start to October.
