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On March 24, 2023, a severe weather and tornado outbreak began across portions of the lower Mississippi River Valley in the United States. A slow-moving trough moved eastward across the United States and interacted with a moist and unstable airmass originating from the Gulf of Mexico, resulting in widespread heavy rainfall, severe thunderstorms, and significant tornadoes over a four-day period.
On March 22, the National Weather Service's Storm Prediction Center (SPC) issued a level 3/enhanced risk of severe weather across portions of Louisiana, Arkansas, and Mississippi for supercell thunderstorms capable of large hail, damaging winds, and strong tornadoes (EF2+ on the Enhanced Fujita scale). [7]
The Storm Prediction Center (SPC) issued a rare high risk for severe weather in two areas of the Mississippi Valley on March 31, the first high risk issuance since March 25, 2021. Approximately 28 million people were placed under tornado watches, including multiple PDS tornado watches , from the evening of March 31 through the overnight hours ...
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NEXRAD radar imagery of an EF2 tornado near Alta Vista, Kansas on March 13, 2024 (supercell with hook echo on left, velocity on right). The weather system responsible for the outbreak was evident multiple days prior, but the area that received the worst tornadoes was not expected to be the main threat.
Two days later, the SPC upgraded portions of Arkansas, Mississippi, Tennessee, and Alabama to a Moderate risk for severe weather, including a 15% risk area for tornadoes. Early on March 17, the SPC issued a high risk, the first such outlook in two years, for portions of Mississippi, Alabama, and Louisiana. [9]
Should the Mississippi reach the projected major flood crest of 18.4 feet at St. Paul by this weekend, it would be the highest level recorded there since March 31, 2019, when floodwaters reached ...
Meteorological spring began on March 1, and from a historical standpoint, the typically coldest three months of the year have ended. ... March is here, but winter weather may ramp up in Midwest ...