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National Weather Service Marine Forecasts

New Marine Weather Message


On Wednesday, August 6, 2008 at 1800 Coordinated Universal Time (UTC), National Weather Service Forecast Offices (WFOs) serving the Atlantic, Pacific, Gulf of Mexico, Caribbean, and Great Lakes coasts began issuing the Marine Weather Message (MWW) operationally.  Selected WFOs have been issuing the MWW experimentally since August 1, 2007. 

The MWW better informs mariners of adverse marine weather hazards and serves as a dedicated long duration marine watch, warning and advisory product.  The MWW implements the operational Valid Time Event Code (VTEC) for all long term marine Watch, Warning and Advisory events.  This includes the implementation of five new marine watch events.  The MWW is patterned after the winter weather watch/warning/advisory bulletin (WSW) and the non-precipitation watch/warning/advisory bulletin (NPW).

The MWW does not include information on short duration events such as severe thunderstorms and waterspouts or for tropical cyclones.

Prior to August 6, 2008, National Weather Service WFOs issued marine warnings and advisories via VTEC in the Coastal Waters Forecast (CWF) and the Nearshore Marine Forecast (NSH). Operational VTEC in the CWF and NSH were discontinued on August 6, 2008 at 1800 UTC.  The five new marine watch headlines are now also included in the CWF and NSH for those WFO's issuing the MWW.

Current MWW products

This product contains the following suite of marine watch, warning and advisory events:

Marine Watches

  • Hurricane Force Wind Watch
  • Storm Watch
  • Gale Watch
  • Hazardous Seas Watch
  • Heavy Freezing Spray Watch

Marine Warnings

  • Hurricane Force Wind Warning
  • Storm Warning
  • Gale Warning
  • Hazardous Seas Warning
  • Heavy Freezing Spray Warning

Marine Advisories

  • Ashfall Advisory
  • Brisk Wind Advisory
  • Dense Fog Advisory
  • Dense Smoke Advisory
  • Freezing Spray Advisory
  • Low Water Advisory
  • Small Craft Advisory
  • Small Craft Advisory for Hazardous Seas
  • Small Craft Advisory for Rough Bar
  • Small Craft Advisory for Winds

Service Change Notifications (posted at www.nws.noaa.gov/om/notif.htm

MWW Presentations

MWW Directive

Users must add the following product headers to their communications databases to begin receiving the MWW:
 

NWS Eastern Region

     

Local Office

WMO Heading 

AWIPS ID   

     

TAUNTON MA   

WHUS71 KBOX

MWWBOX

BUFFALO NY    

WHUS71 KBUF

MWWBUF

CHARLESTON SC 

WHUS72 KCHS

MWWCHS

CLEVELAND OH   

WHUS71 KCLE

MWWCLE

NEW YORK NY    

WHUS71 KOKX

MWWOKX

PHILADELPHIA PA

WHUS71 KPHI

MWWPHI   

CARIBOU ME    

WHUS71 KCAR

MWWCAR   

GRAY/PORTLAND ME

WHUS71 KGYX

MWWGYX   

WILMINGTON NC  

WHUS72 KILM

MWWILM   

NEWPORT NC     

WHUS72 KMHX

MWWMHX   

WAKEFIELD VA   

WHUS71 KAKQ

MWWAKQ   

STERLING VA   

WHUS71 KLWX

MWWLWX   

 

NWS Central Region

     

Local Office

WMO Heading 

AWIPS ID

     

GAYLORD, MI

WHUS73 KAPX

MWWAPX

DETROIT, MI

WHUS73 KDTX

MWWDTX   

GRAND RAPIDS, MI

WHUS73 KGRR 

MWWGRR   

MARQUETTE, MI 

WHUS73 KMQT

MWWMQT   

CHICAGO, IL

WHUS73 KLOT

MWWLOT  

NORTHERN INDIANA, IN

WHUS73 KIWX

MWWIWX   

GREEN BAY, WI

WHUS73 KGRB 

MWWGRB   

MILWAUKEE, WI

WHUS73 KMKX 

MWWMKX   

DULUTH, MN

WHUS73 KDLH 

MWWDLH   

     

NWS Southern Region

 

 

 

 

 

Local Office

WMO Heading 

AWIPS ID 

 

 

 

MOBILE, AL   

WHUS74 KMOB

MWWMOB   

KEY WEST, FL

WHUS72 KKEY

MWWKEY   

JACKSONVILLE, FL

WHUS72 KJAX

MWWJAX   

MIAMI, FL

WHUS72 KMFL

MWWMFL   

MELBOURNE, FL

WHUS72 KMLB

MWWMLB  

TAMPA, FL

WHUS72 KTBW

MWWTBW   

TALLAHASSEE, FL

WHUS72 KTAE

MWWTAE   

LAKE CHARLES, LA

WHUS74 KLCH

MWWLCH   

NEW ORLEANS, LA

WHUS74 KLIX

MWWLIX   

BROWNSVILLE, TX

WHUS74 KBRO

MWWBRO

CORPUS CHRISTI, TX

WHUS74 KCRP

MWWCRP   

HOUSTON, TX

WHUS74 KHGX

MWWHGX

SAN JUAN, PR        

WHCA72 TJSJ   

MWWSJU   

SAN JUAN, PR/SPANISH/

WHCA72 TJSJ

MWWSPN

     

NWS Western Region

 

 

 

Local Office

WMO Heading 

AWIPS ID 

     

LOS ANGELES, CA 

WHUS76 KLOX

MWWLOX   

SAN DIEGO, CA

WHUS76 KSGX

MWWSGX   

MEDFORD, OR  

WHUS76 KMFR

MWWMFR   

PORTLAND, OR

WHUS76 KPQR

MWWPQR   

SEATTLE, WA  

WHUS76 KSEW

MWWSEW   

EUREKA, CA   

WHUS76 KEKA

MWWEKA    

MONTEREY, CA

WHUS76 KMTR

MWWMTR   

 

 

 

NWS Pacific Region

 

 

 

Local Office

WMO Heading 

AWIPS ID 

     

HONOLULU, HI

WHHW70 PHFO

MWWHFO

GUAM, GU

WHGM70 PGUM

MWWGUM


        
More detailed information on the marine weather message product is provided in the product description document posted at: http://www.weather.gov/os/mww/MWW_PDD.pdf

Users of the product are encouraged to provide feedback by using the brief survey and comment form available online at:http://www.weather.gov/survey/nws-survey.php?code=mww

MWW Example

WHUS76 KMFR 081505
MWWMFR

URGENT – MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE MEDFORD OR
805 AM PDT FRI AUG 8 2008

...GALE WARNING IN EFFECT UNTIL 9 PM PST THIS EVENING...

.WINDS WILL INCREASE LATE THIS MORNING AHEAD OF AN APPROACHING
STRONG COLD FRONT THAT WILL REACH THE COAST BY LATE AFTERNOON.
SOUTH WINDS WILL INCREASE TO GALES LATE THIS MORNING. AFTER THE
FRONT PASSES THROUGH THE WATERS WINDS WILL BECOME NORTHWEST
AND DIMINISH BELOW GALES TO SMALL CRAFT ADVISORY WINDS.

PZZ350-082300-
/O.NEW.KMFR.GL.W.0001.080808T1600Z-080809T0500Z/
COASTAL WATERS FROM FLORENCE TO CAPE BLANCO OR OUT 20 NM-
705 AM PST FRI AUG 8 2008

...GALE WARNING IN EFFECT UNTIL 9 PM PST THIS EVENING...

THE NATIONAL WEATHER SERVICE IN MEDFORD HAS ISSUED A GALE
WARNING...WHICH IS IN EFFECT UNTIL 9 PM THIS EVENING.

SOUTH WINDS WILL INCREASE LATE THIS MORNING AHEAD OF A COLD
FRONT...WITH EXPECTED WINDS OF 35 TO 40 KT WITH GUSTS TO 45 KT.
WINDS WILL BECOME NORTHWEST AND DIMINISH BELOW GALES BEHIND
THE FRONT LATE THIS EVENING.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

A GALE WARNING MEANS WINDS OF 34 TO 47 KNOTS ARE IMMINENT OR
OCCURING. OPERATING A VESSEL IN GALE CONDITIONS REQUIRES
EXPERIENCE AND PROPERLY EQUIPPED VESSELS. IT IS HIGHLY
RECOMMENDED THAT MARINERS WITHOUT THE PROPER EXPERIENCE
SEEK SAFE HARBOR PRIOR TO THE ONSET OF GALE CONDITIONS.

&&

$$

If you have additional questions on the MWW bulletin, contact:

David Soroka
National Weather Service
Marine Weather Program Leader
Phone: 301-713-1677 x 111
email: David.Soroka@noaa.gov


National Weather Service
Office of Climate, Weather, and Water Services
Marine and Coastal Weather Services Branch (W/OS21)
Last modified: Oct 26, 2009
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