Another active week of severe weather is expected for Oklahoma the week before Memorial Day. Severe weather is to begin Tuesday, May 21 and last through Thursday, May, 23.

Seven reported tornadoes struck Oklahoma on Sunday.

Oklahoma ended its warm weekend with multiple severe storms and tornadoes Sunday evening. According to News9 Meteorologist Lacey Swope, who covered the storms that evening for the station in place of Chief Meteorologist David Payne, Oklahoma had seven reported tornadoes. Luckily, no fatalities were reported Sunday.

Preliminary survey reports have marked the tornadoes that struck near Custer City and Yukon as EF-2. Damage surveys are expected to continue before more severe weather heads to Oklahoma.

Last quiet day expected for Oklahoma on Monday, May 20.

Storms from Sunday night pushed through the rest of Oklahoma by mid-morning. The rest of Monday, May 20 is expected to be quiet before the rest of the week ramps up with severe weather. KTUL Meteorologist Colton Williams said on their Facebook page that after Monday, Oklahoma has a chance for storms six days straight.

Severe storms back in Oklahoma starting Tuesday, May 21.

The severe weather potential will return to Oklahoma on Tuesday, May 21. According to the National Weather Service in Norman, severe storms are expected to start developing around 1 p.m. Tuesday and lasting through Wednesday morning. The main concerns are large hail and damaging winds.

Hail is expected up to baseball size, while winds could range from 60 to 80 miles per hour. The tornado threat is very low, but not zero.

National Weather Service in Norman
National Weather Service in Norman
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Severe weather will continue Wednesday, May 22.

As the severe weather from Tuesday moves out Wednesday morning, more severe weather is expected to ramp up again early afternoon Wednesday and last through the evening. Main hazards include large hail, damaging winds and very low tornado risk - again, not zero.

National Weather Service in Norman
National Weather Service in Norman
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Severe thunderstorms possible Thursday, May 23.

It's a bit early for specifics, but as of Monday, May 20, the National Weather Service in Norman is expected severe thunderstorms Thursday, May 23. Storms are expected to develop in the early afternoon and last through the evening. As of Monday, most of Oklahoma is at a slight risk, but Oklahomans are encouraged to check back for updates, as the risk and locations may change.

National Weather Service in Norman
National Weather Service in Norman
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Flash flood risk to increase.

With the incoming of more storms, flash flooding will be a risk for most of Oklahoma. Those along I-44 are at a marginal risk while those southeast of I-35 are at a slight risk. The flask flood risk is expected Wednesday through Friday.

National Weather Service in Norman
National Weather Service in Norman
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Temperatures are expected to drop with the onset of severe weather.

Luckily, all of these storms will bring in cooler weather to Oklahoma. Temperatures on Tuesday will stay in the 90s but after Wednesday, Oklahoma will have a few days in the 70s and 80s. But the 90s may return for Memorial Day weekend, plus more possibilities for storms.

National Weather Service in Norman
National Weather Service in Norman
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The Ten Most Tornado-Prone Counties in America

When it comes to the topic of tornadoes, Oklahoma is universally known around the world for producing some of the biggest, including the last F6 ever measured... but it'd probably surprise most Okies that the Sooner State doesn't even crack the top five of the most tornado-prone counties in America.

Gallery Credit: Kelso

Things You'll Need in Your Oklahoma Tornado Prep Kit

Even though the odds of your life being affected by a tornado are extremely thin, there's no harm in being prepared with basic necessities. Even if the storm misses your home you could still find yourself without power or water for days to weeks. Here's a quick rundown on the basics every home should have for tornado season in Oklahoma.

Gallery Credit: Kelso

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