Sub-zero temperatures coming to Chicago.

[dan_s]

This is why the Jan25 NYMEX contract for HH natural gas is up ~7% today.,
 
https://www.msn.com/en-us/weather/topstories/what-is-a-polar-vortex-chicago-is-on-target-to-see-brutal-cold-for-the-next-few-days/ar-AA1vFI5a

Sub/Zero temps in Chicago can reduce natural gas in storage by 50 Bcf Per Day, especially when it is windy.