SPC Severe Thunderstorm Outlook for Sunday October 24, 2021
⛈ A compact and vigorous upper level low pressure system is expected to spawn an outbreak of severe thunderstorms on Sunday across the Missouri Ozarks, and portions of the Lower Midwest. All Severe Hazards are likely, which includes Tornadoes, Large Hail, and Damaging Wind.

Severe Thunderstorms will begin to increase in coverage by late afternoon, especially across Central and Northern Missouri. These storms have to potential to produce significant impacts. Additional storms are expected to form in an arc from western Illinois into extreme western Indiana by evening, and may also be severe with only isolated impacts.
SPC Tornado Outlook for Sunday October 24, 2021
🌪 The Storm Prediction Center has outlined a 10% Significant Tornado Risk from Joplin to St. Louis, Missouri for Sunday. In these areas, 1 or 2 supercells and/or multi-storm clusters could produce violent tornadoes. Elsewhere, any tornadoes that do form should remain weak and short-lived.

Conditions are favorable for tornadoes due in part to unseasonably warm air and above normal moisture content, considering the time of year. Additionally, deep layer shear in advance of an upper level cyclone will promote mesocyclones, which can produce significant tornadoes.
  • 🌡 Winter Snowfall Forecast
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    🌡 The 2020/21 SWC Winter Snowfall Forecast illuminates a wintry picture over a large portion of America. A La Nina favored large-scale pattern with upper-level ridging in the west and troughing in the east was considered in developing this forecast. Other influences, from the Arctic to the North Atlantic, could play a major role on how storm systems progress across the country.
Additional severe weather impacts such as large hail and damaging wind are also expected within the strongest storms. Damaging wind will become the primary threat after dusk as storms race eastward into Illinois and parts of the western Ohio Valley. Anyone traveling across Interstates 70 and 44 should monitor the progress of Sunday's storm activity.

More severe weather is expected to take shape across the same areas on Wednesday and Wednesday night as a large Fall cyclone digs southeastward from the northern Rockies. We are tracking the potential for all severe weather hazards with this activity as well.

☀️ This forecast was prepared by the SWC Forecast Team.

  • ☃️ The SWC Winter Forecast has been released for the 2021-22 Season. Our forecasters break down the details of how the upcoming Winter will play out across the United States.
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    ⚠️ Click on real-time watch, warning, and advisory polygons for critical weather information. Allow the SWC location feature to plot your location on the map. Expand the map and visit all SWC Weather Layers.
  • 🧊 As Winter Weather impacts become more frequent across America, it's important to brush up on the basics. Let's review how you can prepare yourself and your family for the worst of Old Man Winter!
    📦 Pack an Emergency Supply Kit.
    📱 Charge all Communication devices.
    🚗 Winterize all family vehicles.
    📖 Get up-to-date weather reports.
    🙌 Share your travel plans with others.
    🛣 Monitor road conditions.
  • 📡 View the latest Goes-16 Visible Satellite image of the United States. This image will update every 5 minutes.
  • 🔥 As La Nina continues to control the overall pattern across the Western U.S., dry conditions are prevailing across Arizona, Utah, and New Mexico. These conditions are forecasted to continue through Winter 2020/21.