Spring is known for its volatile weather and that has been true so far this month. Emergency managers can go from dealing with severe storms one day to accumulating snow the next. Another strong spring storm will spread snow and severe storms from the central US to the East Coast Sunday into Monday:

A weather map depicting the ECMWF model for March 15, 2026, showing pressure systems, precipitation types, and 1000-500mb thickness across the United States.

Severe Weather Threat

We already had a busy week of severe weather this past week with multiple tornadoes, damaging wind gusts, and large hail reports:

Map showing filtered storm reports for March 9, 2026, including tornado, wind, and hail reports across the southern United States.

Another widespread severe weather event will start on Sunday for many of the same locations that saw severe storms this past week:

Map showing the SPC Day 3 Categorical Outlook for severe weather, indicating risk levels across the southeastern United States.

The Storm Prediction Center has already upgraded Sunday’s threat to a level 3 out of 5. Right now, the big threat looks to be a widespread damaging wind event. That said, tornadoes will also be possible, both ahead of the main squall line and embedded within the line. By Monday, the threat will shift to the Mid Atlantic:

Map showing the Day 4-8 Severe Weather Outlook, highlighting areas in the southeastern United States with varying levels of severe weather risk.

The squall line that forms Sunday will continue into the area highlighted above for Monday. Damaging winds with embedded tornados will be the threat along the line of storms. In addition, there is a possibility for storms to form ahead of the main line. These storms would bring a tornado threat to the Carolinas and Eastern Virginia.

Snow and Possible Blizzard Conditions

Heavy snow will spread from the Interior West into the Northern Plains and Upper Midwest starting Saturday:

Weather map displaying projected snowfall amounts in inches across the United States for March 16, 2026. The map uses a color gradient to indicate varying levels of snowfall, with darker colors representing heavier snowfall.

This snow will be accompanied by strong gusty winds up to 60 mph. Watch the strong winds sweep across the Central US:

Weather map showing 10-meter wind gusts in miles per hour across the central United States, with varying intensity indicated by color gradients.

In addition to the snow, ice is possible south of the heaviest snow.

Map showing accumulated freezing rain (in inches) across the Midwest and Great Lakes regions of the United States, valid for March 16, 2026. Areas in pink indicate varying levels of accumulation.

Travel will be hazardous and nearly impossible at times across the region.

Another Shot of Cold Air

This past week saw a major drop in temperatures, especially across the eastern US. Behind this system will be no different. Watch the temperatures drop in the below animation from Sunday at 2pm EST to Tue at 8am EST

Temperature map of the eastern United States showing varying temperatures in Fahrenheit on March 15, 2026, with cooler temperatures in the north and warmer temperatures in the south.

As spring storms become more powerful and complex, having reliable weather intelligence is critical. Weatherstem provides real-time weather monitoring, lightning detection, and decision-support tools that help organizations btay ahead of rapidly changing conditions. Don’t wait until severe weather is already impacting your operations, learn how Weatherstem can help you monitor threats, protect people, and make confident weather decisions when it matters most. Contact us today to see how Weatherstem can strengthen your severe weather preparedness.

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