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St. Louis Cardinals v Milwaukee Brewers

The tarp covers the infield 30 minutes before the scheduled start of a game between the St. Louis Cardinals and the Milwaukee Brewers at Busch Stadium on Wednesday, April 24, 2019, in St. Louis. Photo by Laurie Skrivan, lskrivan@post-dispatch.com

The threat of inclement weather prompted the Cardinals to preemptively postpone Tuesday night's game against the Kansas City Royals and reschedule the game for an interleague, day-night doubleheader Wednesday.

It also clears everyone's schedule for the Blues game.

The Cardinals on Twitter that they will have a 12:15 p.m. first pitch for the first game Wednesday at Busch Stadium, and a nightcap will follow with a scheduled first pitch of 6:45 p.m. St. Louis time. Tickets for Tuesday night's game will be good for Wednesday's night game, the team announced.

Here are the pitching pairings for the doubleheader:

Game 1: Michael Wacha (3-1, 4.93 ERA) vs. Brad Keller (2-5, 4.66)

Game 2: Adam Wainwright (3-4, 4.75) vs. Homer Bailey (4-4, 5.36)

Spirals from the same storm that caused a delay Saturday for the Cardinals in Texas have followed them home to St. Louis. Thunderstorms are expected to move into the St. Louis area shortly before the planned first pitch of 7:15 p.m. The National Weather Service warned on its Web site: "The threat for severe thunderstorms producing tornadoes, strong winds, large hail, and additional flash flooding, will continue to shift slowly eastward across the region."

After 3:10 p.m., the service issued a tornado watch for the area that was scheduled to last until 10 p.m.

Already this month the Cardinals have had two rain delays of at least 2 hours, including this past Saturday in Arlington, Texas, when tornado warnings and two waves of severe thunderstorms — one of which included a peppering of hail — led to a 2-hour, 11-minute delay.

The Cardinals are returning from a 2-4 road swing through Atlanta and Texas that has contributed to a losing stretch that began in the previous home stand. They have lost 13 of their previous 17 games and will reach Wednesday's doubleheader on the brink of .500, at 24-23. They trail division-leading Chicago by four games. 

The Royals are 16-31 and already 15 games behind in the American League Central. Only Miami (13-31) and Baltimore (15-32) have worse records in MLB.

Derrick Goold is the lead Cardinals beat writer for the St. Louis Post-Dispatch and past president of the Baseball Writers' Association of America.