Weather radio in Illinois

KZZ81: NOAA Weather Radio, Lockport

162.425 MHz · 1,000 W · On the air

KZZ81 broadcasts NOAA Weather Radio on 162.425 MHz (WX4 on most receivers) from Lockport, with the transmitter at Downers Grove, Illinois, at 1,000 W. The National Weather Service office in Chicago, IL programs it. It covers 8 counties in Illinois and Indiana.

The transmitter and its neighbors

KZZ81 (the largest dot) and the transmitters within 100 miles, colored by their status now.

  • On the air
  • Degraded
  • Off the air

The transmitter

Call sign
KZZ81
Frequency
162.425 MHz (WX4)
Power
1,000 W
Status
On the air
Station
Lockport
Transmitter site
Downers Grove
NWS office
Chicago, IL
Location
41.6006, -87.9789

Counties covered

Program a SAME receiver with the code of your county. Coverage is NWS’s note of the part of a county the signal reaches.

CountyStateSAME codeCoverage
CookIllinois017031Whole county
DuPageIllinois017043Whole county
GrundyIllinois017063Whole county
KaneIllinois017089Whole county
KankakeeIllinois017091Whole county
KendallIllinois017093Whole county
WillIllinois017197Whole county
LakeIndiana018089Whole county

Nearby transmitters

More

Weather radio in IllinoisEvery transmitterThe forecast hereAlerts in force in Illinois

Sources

Transmitters, status and county coverage from the National Weather Service’s NOAA Weather Radio county coverage listing (data). Public domain. Read September 26, 2026 at 11:46 AM UTC; held for an hour. Original at weather.gov. Report an outage to NWS at weather.gov/nwr.