AtmostormCounty briefing

Stephenson County, IL

Severe-weather activation briefing

Generated 2026-09-20T12:30:55.088617+00:00

1 active warning

Radar over Stephenson County, IL with the warned area outlined

In the warned path — county-wide (estimate)

~0 residents

Active warnings (1)

1. Flood Advisoryuntil 2026-09-20T13:00:00+00:00

Flood Advisory issued September 20 at 4:30AM CDT until September 20 at 8:00AM CDT by NWS Chicago IL

In path: ~0 residents.

Storm details · Full facility list (per-warning briefing)

County exposure (baseline)

Stephenson County, IL has an estimated 44,630 residents, including 5 nursing homes, 1 mobile-home park, 1 dialysis center, 1 hospital and 23 schools. This is the denominator behind “in the warned path”.