Thunderstorm Wind — Greene, Illinois

2021-08-26 · near White Hall, Greene, Illinois

Event narrative

Thunderstorm winds blew down several power lines around town as well as numerous tree limbs.

Wider weather episode

Early morning thunderstorms resulted in outflow that left a remnant boundary across the forecast area. Visible satellite clearly marked a corridor with developing cumulus and associated thunderstorms, which stretched from central Illinois through Rolla, MO. Mesoanalysis depicted 4000-5000+ J/kg of SBCAPE along this line, dew points well into the 70s, PWATs pushing near 2 inches, and DCAPE between 1000 and 1600 J/kg. The biggest limitation was the lackluster shear, less than 20 knots covering this region. This environment suggested frequent lightning, locally very heavy rain with rainfall rates of 1-2+ inches per hour, and downburst winds that could reach 50-60 mph through the early evening. There were numerous reports of damaging winds.

View location on OpenStreetMap → (39.4414, -90.4095)

Source: NOAA Storm Events Database, event_id 980276. Narrative written by the NWS forecast office that issued the report.