What Happened

A multi-state severe weather outbreak struck the Midwest overnight and into Tuesday morning, producing 3 confirmed tornadoes across Arkansas and Illinois, along with 222 hail reports and 243 wind damage reports spanning 13 states. The event unfolded over a roughly 12-hour window as supercells and multicellular clusters tracked eastward ahead of a warm front lifting northward into the Mississippi Valley.

The tornado reports came from Germantown, Illinois, and two locations in Arkansas near Hanover and Greenfield. All three remain under investigation by National Weather Service survey teams, with EF-scale ratings pending as of Tuesday morning.

The hail threat dominated the outbreak. Reports of quarter-size (1.00 inch) to golf ball-size (1.75 inch) hail blanketed Illinois, Indiana, Kentucky, and Missouri. The largest confirmed hailstone measured 1.75 inches in Holland, Indiana, where the National Weather Service office in Louisville noted "hail damage to a couple of homes also occurred."

Wind damage was widespread. A semi-truck was blown over near Taylorville, Illinois, after a tree fell across the roadway. In Cortland, Indiana, 30 power poles were knocked down, with additional damage reported to house roofs. Peak measured wind gusts reached 71 mph in Oblong, Illinois.

Tornado Details

Germantown, Illinois — 01:08 UTC (8:08 PM CDT Monday)

The first tornado touched down in Germantown, a village of roughly 1,200 residents in Clinton County, Illinois. The National Weather Service office in St. Louis reported "large trees down... street signs blown down." The tornado's path length, width, and rating remain under investigation.

2 NW Hanover, Arkansas — 03:31 UTC (10:31 PM CDT Monday)

A second tornado was confirmed northwest of Hanover in Arkansas. The National Weather Service office in Little Rock noted the tornado was "radar confirmed and reported by multiple sources." No damage details have been released as of Tuesday morning.

2 NNE Greenfield, Arkansas — 05:48 UTC (12:48 AM CDT Tuesday)

The final tornado occurred north-northeast of Greenfield in Boone County, Arkansas. The National Weather Service office in Memphis described "multiple reports of a rope tornado near HWY1 and CR452," with photographic confirmation posted to social media. The rope tornado classification suggests a narrow, often short-lived funnel.

The Broader Outbreak

The severe weather event stretched from the lower Mississippi Valley to Ohio, with the most concentrated activity across Illinois, Missouri, Indiana, and Arkansas. States reporting severe weather included Arkansas, Illinois, Indiana, Iowa, Kansas, Kentucky, Mississippi, Missouri, Nevada, Ohio, Tennessee, Texas, and Wisconsin.

Hail was the dominant hazard. Of the 222 hail reports, the majority fell in the 1.00 to 1.50 inch range — large enough to dent vehicles and damage roofs. Springfield, Illinois, saw multiple hail reports between 1.00 and 1.50 inches over a 10-minute span starting at 13:56 UTC (8:56 AM CDT). The National Weather Service office in Lincoln, Illinois, received reports from both trained spotters and the mPING crowdsourced weather app.

Wind damage reports numbered 243, with the highest concentration in Missouri and Illinois. Many reports described large tree limbs snapped, power lines downed, and structural damage to outbuildings. In Slater, Missouri, several power poles were knocked down. A flag pole was toppled near Higbee, Missouri. The semi rollover near Taylorville, Illinois, occurred when a tree fell across the roadway during the height of the storm.

The Setup

The outbreak was driven by a mid-level shortwave trough ejecting eastward across the southern and central Plains. Rich low-level moisture surged northward from the Gulf into Arkansas, aided by a low-level jet and a warm front lifting into the Ozarks.

According to the NOAA Storm Prediction Center (SPC), "a strongly unstable airmass exists across the southern Plains to the ArkLaTex, along and near a slowly retreating/northward-returning warm front." The SPC's Day 1 Convective Outlook issued Tuesday morning highlighted an Enhanced risk across parts of the southern Plains into the lower Mississippi Valley and Mid-South, with "very large to giant hail (2-4+ inches), swaths of severe/damaging winds, and a few tornadoes" all possible through Tuesday evening.

The overnight storms that produced the three tornadoes were part of an initial wave of elevated supercells that developed across the region and tracked east-northeastward. The SPC noted these storms posed "a threat for mainly large to very large hail through the rest of the morning," with eventual clustering and a greater damaging wind threat expected as the convection crossed the warm front and accessed greater instability across Arkansas and the Ozarks.

Context and Outlook

The three tornadoes reported overnight add to an active April across the central United States. Recent VORTEX blog posts have documented multiple tornado events across Arkansas and Illinois over the past week, consistent with the climatological peak of tornado season in the Plains and Midwest.

Tuesday's severe weather threat remains elevated. As of 7:00 AM CDT, multiple Severe Thunderstorm Watches were active across parts of the region, with the SPC forecasting "extreme instability (4000+ J/kg MLCAPE) and very strong deep-layer shear (50-60+ kt)" to support "multiple intense supercells" capable of "very large to giant hail (2-4+ inches)" and a tornado threat.

The SPC's Tuesday outlook also highlights the potential for "multiple rounds of supercells and multicell clusters capable of producing large hail, scattered to numerous damaging winds, and perhaps a few tornadoes" across the lower Mississippi Valley and Mid-South through Tuesday evening.

Safety Takeaways

Overnight tornadoes present a unique danger. Most people are asleep when warnings are issued, and outdoor warning sirens are often inaudible indoors. Third-party weather apps are silenced by Do Not Disturb, though Wireless Emergency Alerts for tornado warnings still break through on most phones by default.

If you live in an area under a severe weather threat:

  • Charge your phone before bed. Keep it within arm's reach, not across the room.
  • Know your safe place. The lowest floor, interior room, away from windows. A basement or storm shelter is best.
  • Have a flashlight and shoes nearby. Tornadoes often knock out power. Debris can include broken glass and nails.
  • Don't rely on sirens. They're designed for outdoor warning, not to wake you indoors.

The National Weather Service issues tornado warnings with an average lead time of 10 to 15 minutes. That window is critical — use it to get to safety immediately.

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.