EF3 Tornado — Woodford, Illinois

2017-02-28 · near Low Pt, Woodford, Illinois

Event narrative

A tornado touched down in an open field about 3.7 miles west of Washburn in extreme northern Woodford County at 5:26 PM CST. The tornado broke windows and did roof damage to a house and destroyed several outbuildings about a mile from its origin. The tornado rapidly widened to more than 1/4 mile across and increased in intensity to EF-3 as it destroyed a house about 2.5 miles west of Washburn. One mile to the east, the tornado tore the roof off a house before moving into Washburn. The tornado damaged 8 houses in town...doing significant damage to roofs, garages, automobiles, and trees before crossing into extreme southern Marshall County at 5:31 PM CST.

Wider weather episode

An unseasonably warm and humid airmass was in place across central Illinois on February 28th...with afternoon high temperatures soaring to record levels in the upper 60s and lower 70s. Thanks to these extremely warm temperatures and dewpoints surging into the upper 50s and lower 60s, Convective Available Potential Energy (CAPE) values exceeded 1500J/kg across Missouri and the western half of Illinois by late afternoon. In addition, a strong mid-level jet streak enhanced 0-6km wind shear to an impressive 60-70kt. While the airmass within the warm sector was initially capped, an approaching upper wave helped weaken the cap and set the stage for strong to severe thunderstorms into the evening. As a cold front pushed across the Mississippi River, supercell thunderstorms initiated across west-central Illinois during the late afternoon and lingered into the evening. These storms produced a total of 4 tornadoes in the National Weather Service Lincoln County Warning Area (CWA), including an EF-3 tornado that touched down west of Washburn in Woodford County. Other storms produced scattered reports of large hail and damaging winds across the area.

View location on OpenStreetMap → (40.9128, -89.3609)

Source: NOAA Storm Events Database, event_id 678122. Narrative written by the NWS forecast office that issued the report.