The jet stream is shifting to the north as it crosses the heart of North America, and that is setting the stage for this weekend's unusually mild temperatures.
The jet stream separates northern cold air from southern warm air.
When the jet stream shifts northward, it holds cold Canadian air at bay and allows southern and Pacific warmth to bathe the United States. The jet stream is a current of strong winds in the upper atmosphere that affects local weather by separating air masses and providing a route for storms to travel.
Temperatures across the Great Plains are forecast to be 10 to 20 degrees above normal this weekend, including in Omaha.
The latest forecast indicates highs in the upper 50s in Omaha on Saturday and possibly into the low 60s on Sunday.
The normal high for this time of year in Omaha is around 40 degrees.
While those forecast highs are considerably above normal, they're not record-setting.
The record high in Omaha for today is 72 degrees; Friday, 66; Saturday, 69; and Sunday, 67.
Source: National Weather Service