National Weather Service United States Department of Commerce

Heavy Rainfall Along the Eastern Seaboard; Dangerous Heat Wave Shifting East Next Week

Showers and thunderstorms may produce heavy to excessive rainfall along the east coast today. The associated rainfall will likely create localized areas of flash and urban flooding. An extremely dangerous heat wave will shift into portions of the central and eastern U.S. late this weekend, lasting through the next work week. Widespread daily record high temperatures are expected. Read More >

NOAA Weather Radio

KXI41 Crystal Lake, 162.500 MHz

NOAA All Hazards Weather Radio station KXI41 serves portions of the north and northwest suburbs, which includes Lake County and surrounding areas, from a 300 Watt transmitter in Crystal Lake, Illinois. The nominal effective range of the transmitter is about 40 miles. Continuous 24 hour programming is provided from the National Weather Service Chicago Forecast Office, located southwest of Chicago in Romeoville Illinois.

A map of the listening area is shown below, with Specific Area Message Encoder codes shown for each county. Severe weather watches and warnings are tone-alerted for all counties shaded in blue. Tone alarm tests for the Crystal Lake radio occur each WEDNESDAY at approximately 11 AM.


Map Of KXI-41 Listening area



SAME code


Signal coverage area map

Broadcast Cycle

  • Station ID Message
  • Regional Weather Synopsis
updated around 430 AM and 430 PM, or as needed
  • Hourly Temperature Roundup
updated between 5 and 10 min past the hour
  • Short Term Forecast
only when precipitation or active weather is near North Central Illinois
  • McHenry County and surrounding area Forecast
updated 4 AM and 4 PM and as needed
  • Great Lakes Forecast
updated 3 AM and PM, 9 AM and PM, with Nearshore (during warm season)
  • Chicago Climate Summary
6 AM to 10 am, and 4 PM to 7 PM
  • River Stages
for the Fox River (during the warm season)
  • Severe Weather and other special programming during "active" weather