National Weather Service observers keep a comprehensive record describing 48 different types of severe events, from localized thunderstorms, tornadoes, and flash floods to regional events such as hurricanes, derechos, and winter storms. The other frequencies were added when closer station spacing resulted in interference. Severe events have the potential to damage life and property. For instance, The weather frequency 162.400 MHz may be assigned to Channel 1 on one make and model radio and assigned to Channel 4 on other one. ![]() The coverage maps are shown in a single color format, which relates to an estimated signal level. NOAA Weather Radio Frequencies Continuous broadcast of weather information from the National Weather Service Channels 1 and 7 are the original frequencies. The seven NOAA frequencies are listed as follows: 162.400 162.425 162.450 162.475 162.500 162.525 162.550 There is no standard channel assignment for weather frequencies on two way radios.432 438 MHz: This range includes a popular amateur satellite band as well as a few Earth resources satellites. Around 400 MHz is a companion band for satellites transmitting on 150 MHz. Seasonal environmental conditions, such as icing or heavy rain, affect performance of a transmitter station and its various components, particularly those subject to continuous weather exposure. 399.9 403 MHz: This band includes navigation, positioning, time and frequency standard, mobile communication, and meteorological satellites.Because of variations in local site conditions, the performance of an individual transmitter and antenna may be less than predicted or expected. NOAA Weather Radio includes more than 985 transmitters, covering all 50 states, adjacent coastal waters, Puerto Rico, U.S. ![]()
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