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NOAA 162.55 MHz

Green is rain, pink is ice/sleet and blue is snow. Wind symbols in mph. Barbs point to direction wind is coming from. KNOTS-TO-MPH CALC: (e.g. 8 knots = 9 mph).

Chicago NEXRAD RADAR LOOP | LATEST FRAME Chicago NEXRAD
SIX FRAMES* -- approximately past 45 minutes ...  | LATEST FRAME ...

Chicago NEXRAD RADAR with Storm Track
VECTOR and STORM INFO (Tornado Vortex Signature, Mesocyclone) ...
*Subscribers to Weather Underground (wunderground.com) can get additional frames

TORNADO SIREN IS A STEADY BLAST OF SIREN THAT IS ACTIVATED BY A LOCAL GOVERNMENT WHEN THE VILLAGE OR CITY IS IN THE PATH OF A CONFIRMED TORNADO. There could be very little time from warning to impact or there could be a prolonged period of 30 to 45 minutes (for example) with towns listed in the path and accurate estimated arrival time of the tornado or tornado-producing storm. The tornado and/or storm could dissipate or increase in intensity. Tornados can also change direction.

THERE IS NO 'ALL CLEAR' ALERT FOLLOW UP BY THE TORNADO SIREN.
The siren is tested on the first Tuesday of every month at about 10 a.m.



Still weather, some low westward clouds, an eastward storm cell and a tornado siren for a tornado warning on August 8, 2007. The storm dissipated and brought very little lightning or thunder, even though funnel clouds were sighted while the storm was en route in a path toward Arlington Heights, Illinois. Background audio report is from a police dispatch relaying sighting information to police officers in the area.

NOAA WEATHER RADIO 162.55 MHz
NOAA Weather Radio All Hazards (NWR) is a nationwide network of radio stations broadcasting continuous weather information directly from the nearest National Weather Service office. NWR broadcasts official Weather Service warnings, watches, forecasts and other hazard information 24 hours a day, 7 days a week. The Chicago area is served on a frequency of 162.55 MHz. Radio Receivers for National Weather Service NOAA Weather Radio Service and Duracell batteries, Eveready Energizer batteries, rechargeable batteries, and other batteries are available on Amazon.