May 20, 2019: Oklahoma City, Oklahoma, U.S.: Lightning strikes at night from huge squall line covering 6 states areas in the Oklahoma City as flooding rain and severe storms, including tornadoes, are predicted in the Southern Plains through late Monday. Tornado watches in effect in the Texas Panhandle and Oklahoma expire before midnight. Then, flooding is expected to become the major concern overnight from Oklahoma City to Tulsa and to the northeast. The tornado outbreak has not been as severe as feared as twisters have mostly avoided population centers. (Credit Image: &#169; Gene Blevins/ZUMA Wire - Stock Image