Frequencies used for MF transmissions: 2182 kHz Present calling frequency 2187.5 kHz Future calling frequency) 2670 kHz The U.S. Coast Guard broadcasts National Weather Service offshore forecasts and storm warnings of interest to the mariner on 2670 kHz following an initial call on 2182 kHz. Typical transmission range is 50-150 nautical miles during the day and 150-300 nautical miles at night. These broadcasts are prepared by the Marine Prediction Center, Anchorage Forecast Office , Honolulu Forecast Office, Miami Forecast Office, and New Orleans Forecast Office. In the state of Alaska, medium frequency (MF) voice broadcasts, are performed from National Weather Service Forecast Offices on a frequency of 4125 kHz . MF VOICE WEATHER BROADCAST
First Coast Guard District Group Southwest Harbor, Maine none Group Portland, Maine none Group Boston, Massachusetts none Group Woods Hole, Massachusetts 0440Z 1640Z Group Moriches, New York 0010Z 1210z Group Long Island Sound, New York none Activities New York, New York none Fifth Coast Guard District Atlantic City, New Jersey 1103Z 2203Z Group Philadelphia, Pennsylvania none Baltimore, Maryland none Eastern Shore, Virginia 0233Z 1403Z Hampton Roads, Virginia 0203Z 1333Z Cape Hatteras, North Carolina 0133Z 1303Z Fort Macon, North Carolina 0103Z 1233Z Seventh Coast Guard District Group Charleston, South Carolina 0420Z 1620Z Group Mayport, Florida 0620Z 1820Z Group Miami, Florida 0350Z 1550Z Group Key West, Florida none Greater Antilles Section 0305Z 1505Z Group St. Petersburg, Florida 0320Z 1420Z Eighth Coast Guard District Group Ohio Valley none Group Upper Mississippi River none Group Lower Mississippi River none Group Mobile 1020Z 1220Z 1620Z 2220Z Group New Orleans 0550Z 1035Z 1235Z 1635Z 2235Z Group Galveston 1050Z 1250Z 1650Z 2250Z Group Corpus Christi 1040Z 1240Z 1640Z 2240Z Ninth Coast Guard District Group Buffalo none Group Detroit none Group Sault Ste. Marie none Group Grand Haven none Group Milwaukee none Eleventh Coast Guard District Group Humboldt Bay 0303Z 1503Z Group San Francisco 0203Z 1403Z Group Los Angeles/Long Beach 0503Z 1303Z 2103Z Activities San Diego none Thirteenth Coast Guard District Group Seattle none Group Port Angeles 0615Z 1815Z Group Astoria 0533Z 1733Z Group Portland none Group North Bend 0603Z 1803Z Fourteenth Coast Guard District Group Honolulu 0545Z 1145Z 1745Z 2345Z Marianas Section 0705Z 2205Z Seventeenth Coast Guard District Communication Center Juneau none Air Station Kodiak none Marine Safety Office Valdez none In the state of Alaska, medium frequency (MF) voice broadcasts, are performed from National Weather Service Forecast Offices on a frequency of 4125 kHz.
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