Scattered supercell storms should be able to fire this afternoon across W OK and travel east during the early evening hours into central OK. The threat is primarily for hail/wind but a couple of tornadoes cannot be ruled out.
Additional storms will form overnight and travel through the SE quadrant of the state producing torrential rainfall. Another round is expected over the same area Friday afternoon/night in SE OK. In addition a few storms may form again in W OK Friday afternoon and travel into C OK by Friday evening. However, depending upon the subsidence from the storms in SE OK they could easily fall apart once they move into C OK. Time will tell at this point. Large clusters of storms wreck the atmosphere over large areas and rob the instability, which is a good thing of course for the rest of the region.
As far as your Memorial Day Weekend, Saturday looks great statewide. However, a large storm cluster called an MCS should develop and move through the state late Sunday and Monday. For Memorial Day itself, W OK should be dry, but can’t say the same for C/E OK. Plan accordingly.
Severe weather wise, the main threat Sunday and Monday will be hail/wind/flash flooding. The tornado threat is extremely low and is mainly confined to QLCS tornadoes, aka the very weak EF0-EF1 kind that form quickly and dissipate just as fast along the leading edge of squall lines.
Enjoy the weather and stay safe! -AT