An extreme pattern evolved this weekend just as Nate came ashore on the Gulf Coast, the 4th US hurricane landfall of 2017. A 2nd unusually deep, cold trough has dove down the Rockies and brought the first snowfall of the fall to Denver but an equally anomalous downstream ridge means summer lives on.

In these extreme cases, you get a huge variation in weather across a small area. Denver sees snow while Dallas sees record 90s!

Nate’s enhanced heat and humidity pump is sure being felt.

ON THE COLD SIDE

https://twitter.com/NBCDFWWeather/status/917122592749899779

https://twitter.com/weatherchannel/status/917376111595548672

https://twitter.com/LizGelardi/status/917379498269478912

https://twitter.com/BrianJamesNBC5/status/917482939516162048

ON THE WARM SIDE

The thermometer read 70 degrees up as far as the Canadian border at dawn yesterday as Caribbean level humidity swept the East Coast. The strong flow stemming from the deep tropics continues to present mid summer-like heat and humidity all the way to Canada.

https://twitter.com/Accu_Jesse/status/917061244418445312

https://twitter.com/ericfisher/status/917208982787411968

https://twitter.com/ericfisher/status/916995021995376642

https://twitter.com/RyanNBC6/status/917174254017351681

https://twitter.com/EricBlake12/status/917038190560776195

https://twitter.com/TravisABC13/status/917335655109275648

https://twitter.com/NWS_BaltWash/status/917271793106341888

https://twitter.com/BenNollWeather/status/917577002839764992

https://twitter.com/BenNollWeather/status/917239518486335488

Tags: denver october snow, hurricane nate, record october warmth