National Weather Service United States Department of Commerce
Public Information Statement
National Weather Service Chicago IL
752 AM CDT Thu Apr 5 2018 /852 AM EDT Thu Apr 5 2018/

...NOAA weather radio station KZZ-81 off the air at times...

The NOAA weather radio station, KZZ-81, broadcasting from a tower
in Lockport, Illinois will be intermittently be off the air today
for upgrade to voice lines.

We apologize for any inconvenience this may cause.

For forecasts and statement service in this portion of northern
Illinois and northwest Indiana, use any of the following

Chicago:      Frequency 162.550
Plano:        Frequency 162.400
Crystal Lake: Frequency 162.500
Kankakee:     Frequency 162.525