Locations forecast to be within one degree of record heat on Monday circled. (WeatherBell.com)

A summerlike heat dome, that has baked the Southwest United States since last week, has oozed into the Plains where high temperatures will threaten records Monday for a second straight day.

On Sunday, parts of the Plains logged their highest temperatures ever recorded so early in the season.

“The last day of winter went out with a blaze of warmth Sunday,” wrote Kansas’s Salina Journal, which documented record heat in the region.

And spring is arriving with summerlike swelter. From eastern Colorado to central Missouri, temperatures Monday are forecast to soar into at least the 80s. In West Texas through much of central Oklahoma, widespread 90s are likely.

Numerous cities could set record highs Monday, including Oklahoma City, Kansas City and Lubbock.

In recent days, many locations from the Desert Southwest into the Plains have established new heat milestones, which include:


Map of record and near-record highs set Sunday. (CoolWx.com)

The abnormally warm conditions are a result of a large dome of high pressure at high altitudes which developed in the Southwest late last week and then ballooned into the Plains over the weekend.


GFS model simulation of big high pressure dome over the Plains Monday morning. (WeatherBell.com)

A cold air mass from Canada will drop into the Lower 48 Tuesday and Wednesday, suppressing this high pressure dome to the south and west. Temperatures will return to near normal in the Plains, but remain much warmer than normal in South Texas and the Rockies.


GFS model temperature difference from normal on Wednesday afternoon.