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St. Louis (KSDK) - We've been talking about the need to have a weather radio so you can be alerted to dangerous weather affecting your area, particularly at night, but there are some things you'll need to know.

You will have to program your weather radio so it will knows what counties you want alerted. Start with your own, then add those directly next to yours. Here is a link that will give you the codes for the counties you're interested in:

http://www.nws.noaa.gov/nwr/indexnw.htm#sametable

Here is another link which, though for Midland Radio, will give you an idea how you're radio works:

http://www.nws.noaa.gov/nwr/indexnw.htm#sametable