Marine Forecast Offices and Centers provide
links to their products as well as additional regionally focused
information.
NATIONAL WEATHER SERVICE MARINE PRODUCTS VIA U.S. COAST GUARD HF VOICE
Also see COMMERCIAL MARITIME COAST STATIONS and WEATHER NETS
The U.S. Coast Guard broadcasts National Weather Service highseas forecasts
and storm warnings from six high seas communication stations.
These
broadcasts are prepared cooperatively by the Ocean Prediction Center, Tropical Prediction
Center and Honolulu
Forecast Office.
Offshore
and coastal forecasts are available in areas such as Alaska. See table
below for station locations and schedules. Transmission range is dependent
upon operating frequency, time of day and atmospheric conditions and can
vary from only short distances to several thousand miles. Best reception
can be achieved by proper selection of frequency and an adequate antenna
system.
USCG to continue HF weather broadcasts via radiofax, voice, and SITOR
Effective Jan 01, 2005 U.S. Coast Guard long range communications stations NMF, NMN, NMA, NMG, NMC, NMO, NOJ and NRV changed their single sideband voice radio guard to the following simplex frequencies: 4125, 6215, 8291, and 12290 kHz. These frequencies are intended for initial voice contact and distress alerts and working only. Follow-on working frequencies if necessary shall be by mutual agreement after initial contact. Previously the ship/shore guard duplex frequencies of 4134/4426, 6200/6501, 8240/8764, 12242/13089, and 16432/17314 kHz were routinely shared with the broadcasts of maritime safety information, including weather. These duplex frequency pairs may still be used, however, for traffic handling purposes after initial contact is established on the distress and initial contact frequencies. For further information including monitoring schedules and frequency details, see
http://www.navcen.uscg.gov/marcomms/cgcomms/call.htm
U.S. Coast Guard HF voice broadcasts are performed in the upper sideband
mode using a synthesized voice known as "Iron Mike" ("Perfect Paul" retired in April 07). This voice is very
distinctive and serves as in aid in identifying and copying these weather
broadcasts. Click here to listen to a typical
USCG HF voice broadcast by "Perfect Paul".
Visit the U.S.
Coast Guard Maritime Telecommunications Information webpage
for further information on U.S. Coast Guard telecommunications.
A Listing of NWS Marine Products Broadcast
via U.S. Coast Guard HF Voice is available.
For a complete listing of NWS marine text products (with links)
visit the NWS Production Schedule for
Marine Text Products webpage.
Refer to NGA Publication 117, which
is updated through the Notice to Mariners, for the latest official listing
of U.S. Coast Guard broadcast schedules.
The British Admiralty List of
Radio Signals , is an excellent reference source for weather broadcast information.
All NWS marine forecasts rely heavily on the Voluntary
Observing Ship (VOS) program for obtaining meteorological observations.
Chesapeake(NMN)
HF Voice Broadcast Schedule |
4426, 6501, 8764 kHz (USB) |
0330Z1 |
0515Z2 |
0930Z1 |
|
|
|
|
6501, 8764, 13089 kHz (USB) |
|
|
1115Z2 |
1530Z1 |
2130Z1 |
2315Z2 |
8764, 13089, 17314 kHz (USB) |
|
|
|
1715Z2 |
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|
1 Offshore Forecasts, hurricane information
2 Highseas Forecast, hurricane information
Broadcast of hurricane and other weather broadcasts from this station may on occasion be preempted, as the frequencies are shared with other USCG stations.
|
New Orleans(NMG)
HF Voice Broadcast Schedule |
4316, 8502, 12788 kHz (USB)
|
0330Z1 |
0515Z2 |
0930Z1 |
1115Z2 |
1530Z1 |
1715Z2 |
2130Z1 |
2315Z2 |
1 Offshore Forecasts, hurricane information
2 Highseas Forecast, hurricane information
Broadcast of hurricane and other weather broadcasts from this station may on occasion be preempted, as the transmitters are shared with the radiofax broadcast.
|
Pt. Reyes(NMC)
HF Voice Broadcast Schedule |
4426, 8764, 13089 kHz (USB) |
0430Z |
1030Z |
|
|
8764, 13089, 17314 kHz (USB) |
|
|
1630Z |
2230Z |
Broadcast of hurricane and other weather broadcasts from this station may on occasion be preempted, as the frequencies are shared with other USCG stations, and the transmitters are shared with the radiofax broadcast.
|
Kodiak(NOJ)
HF Voice Broadcast Schedule |
6501 kHz (USB) |
0203Z |
|
1645Z |
Honolulu(NMO)
HF Voice Broadcast Schedule |
6501, 8764 kHz (USB) |
|
0600Z |
1200Z |
|
8764, 13089 kHz (USB) |
0005Z |
|
|
1800Z |
Guam(NRV)
HF Voice Broadcast Schedule |
6501 kHz (USB) |
|
0930Z |
1530Z |
|
13089 kHz (USB) |
0330Z |
|
|
2130Z |
HF voice broadcasts may be terminated if longer than the available broadcast period. This will most likely occur during the hurricane season when supplementary advisories are broadcast in addition to the routine forecasts.
Carrier frequencies shown. HF voice broadcasts use a synthesized
voice "Iron Mike".
ITU channel numbers as follows:
4426(#424), 6501(#601), 8764(#816), 13089(#1205), 17314(#1625)
Note that stations share common frequencies.
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