Mathew_Barlow OP t1_j6x187n wrote

We're going to have some "old fashioned" cold weather. In the Boston area, likelihood of dangerous wind chills from Friday morning through Saturday afternoon. If you're going to be outside or traveling, check your local NWS forecast ( and be prepared.


Mathew_Barlow OP t1_j6wyubs wrote

data source: GFS, from NOMADS server; visualization: ParaView

data link:

At approximately 1.5 km up in the atmosphere, the coldest temperatures in the world are over Hudson Bay and headed for the US. Looking at the lower atmosphere rather than the surface temperature (mostly) removes the influence of elevation. The temperatures are shown in degrees Celsius on the 850 hPa pressure level, which is approximately 1.5 km above the surface.

Mathew Barlow
Professor of Climate Science
University of Massachusetts Lowell