Frequencies used for MF transmissions:2182 kHz Present calling frequency2187.5 kHz Future calling frequency)2670 kHz The U.S. Coast Guard broadcasts National Weather Service offshore forecasts and storm warnings ofinterest to the mariner on 2670 kHz following an initial call on 2182 kHz. Typical transmission rangeis 50-150 nautical miles during the day and 150-300 nautical miles at night. These broadcasts areprepared by the Marine Prediction Center, Anchorage Forecast Office , Honolulu Forecast Office, MiamiForecast Office, and New Orleans Forecast Office. In the state of Alaska, medium frequency (MF) voicebroadcasts, 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 noneGroup Portland, Maine noneGroup Boston, Massachusetts noneGroup Woods Hole, Massachusetts 0440Z 1640ZGroup Moriches, New York 0010Z 1210zGroup Long Island Sound, New York noneActivities New York, New York noneFifth Coast Guard District Atlantic City, New Jersey 1103Z 2203ZGroup Philadelphia, Pennsylvania noneBaltimore, Maryland noneEastern Shore, Virginia 0233Z 1403ZHampton Roads, Virginia 0203Z 1333ZCape Hatteras, North Carolina 0133Z 1303ZFort Macon, North Carolina 0103Z 1233ZSeventh Coast Guard District Group Charleston, South Carolina 0420Z 1620ZGroup Mayport, Florida 0620Z 1820ZGroup Miami, Florida 0350Z 1550ZGroup Key West, Florida noneGreater Antilles Section 0305Z 1505ZGroup St. Petersburg, Florida 0320Z 1420ZEighth Coast Guard District Group Ohio Valley noneGroup Upper Mississippi River noneGroup Lower Mississippi River noneGroup Mobile 1020Z 1220Z 1620Z 2220ZGroup New Orleans 0550Z 1035Z 1235Z 1635Z 2235ZGroup Galveston 1050Z 1250Z 1650Z 2250ZGroup Corpus Christi 1040Z 1240Z 1640Z 2240ZNinth Coast Guard District Group Buffalo noneGroup Detroit noneGroup Sault Ste. Marie noneGroup Grand Haven noneGroup Milwaukee noneEleventh Coast Guard District Group Humboldt Bay 0303Z 1503ZGroup San Francisco 0203Z 1403ZGroup Los Angeles/Long Beach 0503Z 1303Z 2103ZActivities San Diego noneThirteenth Coast Guard District Group Seattle noneGroup Port Angeles 0615Z 1815ZGroup Astoria 0533Z 1733ZGroup Portland noneGroup North Bend 0603Z 1803ZFourteenth Coast Guard District Group Honolulu 0545Z 1145Z 1745Z 2345ZMarianas Section 0705Z 2205ZSeventeenth Coast Guard District Communication Center Juneau noneAir Station Kodiak noneMarine Safety Office Valdez noneIn the state of Alaska, medium frequency (MF) voice broadcasts, are performed from National WeatherService Forecast Offices on a frequency of 4125 kHz.
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