TL;DR

The Storm Prediction Center has issued a Slight Risk for severe thunderstorms across portions of the Ohio Valley, southern Mid-Atlantic, and Carolinas today. Damaging wind gusts are the primary threat as an MCS moves southeast through the afternoon and evening, with the highest probability across eastern North Carolina. Isolated severe storms are also possible over the northern and central Plains.

What Happened Yesterday Sets the Stage

Friday's severe weather outbreak produced 268 wind reports across 15 states, with the heaviest concentration from the Ohio Valley through the Mid-Atlantic. No tornadoes were reported, but 9 hail reports included ping pong ball-sized stones. That same storm system continues to drive today's threat.

An MCS that developed overnight is now progressing southeastward toward the central Appalachians this morning. According to the NOAA Storm Prediction Center (SPC), the outflow from this system has surged well ahead of the deep convection, setting up a volatile environment downstream.

Where Is the Highest Risk Today?

The Slight Risk area stretches from the Ohio Valley through the southern Mid-Atlantic and into the Carolinas. Within this zone, eastern North Carolina faces the highest probability for damaging gusts, where strong afternoon heating will collide with the advancing MCS.

Cities in or near the Slight Risk area include:

A secondary area of isolated severe storm potential exists over the northern and central Plains, including parts of Nebraska, South Dakota, and Montana.

When Will Storms Hit?

Carolinas and Mid-Atlantic

Reintensification of the MCS is expected this afternoon as it interacts with a destabilized airmass across the Mid-Atlantic. Dewpoints are currently in the upper 60s across northern Virginia and climbing into the mid-70s across southeastern North Carolina and eastern South Carolina.

High temperatures will reach the low 90s in northern areas and soar into the upper 90s to low 100s across central and eastern South Carolina. This combination of heat and moisture will support moderate to strong buoyancy despite poor mid-level lapse rates.

The SPC notes that the region sits along the southerly periphery of mid-level northwesterlies, creating vertical shear favorable for maintaining a progressive convective line. Peak severe weather is expected from mid-afternoon through the evening hours, roughly 3 PM to 10 PM local time.

Ohio Valley

Additional afternoon development is expected farther west, from the middle Ohio Valley through Middle Tennessee, where residual outflow will interact with a destabilized airmass. Weak shear should limit storm organization, but isolated damaging gusts remain possible through the evening.

Northern and Central Plains

Elevated thunderstorms have persisted overnight from northeast Nebraska across eastern South Dakota, with a second area of activity across north-central North Dakota. An isolated instance of hail is possible over both regions for the next few hours before storm intensity wanes.

Despite rising heights throughout the day, low-level convergence along the lee trough and an outflow-modified front in Nebraska should be sufficient for convective initiation this afternoon. Limited vertical shear and a deeply mixed boundary layer suggest an outflow-dominant storm mode with widely-spaced severe wind gusts as the primary hazard.

Relatively higher thunderstorm coverage is possible across the central High Plains this evening as warm-air advection supports additional activity. Some clustering is possible, but vertical shear will be weak and overall storm intensity should remain modest.

What Are the Primary Hazards?

Damaging wind gusts are the primary threat across all risk areas today. The SPC outlook emphasizes that the best overlap between buoyancy and vertical shear will occur across eastern North Carolina, where the threat is most pronounced.

The MCS structure—whether it evolves into one coherent convective line or a series of smaller bowing segments—will determine the exact distribution of wind damage. Either scenario would yield a threat for damaging gusts, according to the SPC.

Large hail is a secondary concern, with isolated occurrences possible over parts of the northern and central Plains. Yesterday's hail reports included quarter-sized stones in multiple locations and ping pong ball-sized hail in several locations.

Tornado potential is not highlighted in today's outlook. The vertical shear profiles and storm modes expected today favor wind and hail over rotation.

Why Damaging Winds Are the Focus

The atmospheric setup today features strong surface heating and ample moisture, but the mid-level lapse rates—the rate at which temperature decreases with height—are poor. This configuration limits the potential for supercells and rotating storms but is ideal for producing strong outflow-driven wind gusts.

When thunderstorms develop in this environment, the primary mechanism for severe weather is the downdraft: a column of sinking air that accelerates as it descends and spreads out horizontally when it hits the ground. These outflow winds can exceed 60 mph even without a well-organized supercell structure.

The MCS moving through the region this morning has already demonstrated its ability to produce widespread wind damage. Yesterday's 268 wind reports included numerous trees down, power outages affecting thousands of customers, and structural damage to homes and outbuildings across the Ohio Valley and Mid-Atlantic.

What Should You Do?

If you're in the Slight Risk area, monitor weather conditions closely this afternoon and evening. Damaging wind gusts can develop quickly, especially along the leading edge of a convective line.

  • Secure outdoor objects that could become projectiles in high winds.
  • Charge your devices in case of power outages.
  • Know where to shelter if a severe thunderstorm warning is issued. Move to an interior room on the lowest floor, away from windows.
  • Avoid being outside or in a vehicle when a storm is approaching. If you're driving and encounter high winds, pull over safely and wait for the storm to pass.

Severe thunderstorm warnings are issued by local National Weather Service offices when a storm is producing or is about to produce damaging winds of 58 mph or greater, hail one inch in diameter or larger, or a tornado. These warnings typically provide 10-15 minutes of lead time.

Third-party weather apps are silenced by Do Not Disturb, though Wireless Emergency Alerts (WEA) for tornado warnings still break through on most phones. For severe thunderstorm warnings, which are not always transmitted via WEA, you may need to rely on other alerting methods.

Looking Ahead to Sunday

The SPC Day 2 outlook maintains a Slight Risk for portions of the Southeast, including Georgia and South Carolina, as well as the northern Plains. Another round of severe weather is possible Sunday afternoon and evening, though details will become clearer in tomorrow's outlooks.

Day 3 (Monday) shows a Marginal Risk across the central and northern Plains and into the Northeast, suggesting the active pattern will continue into early next week.

VORTEX is a free web app at vortexintel.app that monitors severe weather nationwide. Pro ($4.99/month) places phone calls to your phone when a tornado or flash flood warning is issued for a location you care about — calls can ring through Do Not Disturb once you enable Emergency Bypass for the number, unlike most third-party app notifications.