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National Weather Service Marine Forecasts

New Marine Weather Message


The Marine Weather Message (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 tropical cyclone watch/warning 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.

Current MWW products as well as most other Marine forecast and warning 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
  • Tropical Storm Watch
  • Hurricane Watch
  • Storm Surge Watch

Marine Warnings

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

MWW Directive

Use the following product headers in 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


MWW Example

WHUS72 KMLB 281406
MWWMLB

URGENT - MARINE WEATHER MESSAGE
National Weather Service Melbourne FL
1006 AM EDT Thu Mar 28 2019

AMZ552-555-570-572-575-290900-
/O.EXP.KMLB.GL.W.0005.000000T0000Z-190328T1400Z/
/O.CON.KMLB.SC.Y.0017.000000T0000Z-190329T2000Z/
Volusia-Brevard County Line to Sebastian Inlet 0-20 nm-
Sebastian Inlet to Jupiter Inlet 0-20
nm-Flagler Beach to Volusia- Brevard County Line 20-60 nm
-Volusia- Brevard County Line to Sebastian Inlet 20-60 nm-
Sebastian Inlet to Jupiter Inlet 20-60 nm-
1006 AM EDT Thu Mar 28 2019

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 PM EDT FRIDAY...

* WINDS...Northeast winds 20 to 30 knots with occasional gusts to gale force this morning. Northeast winds decreasing to 20 to 25 knots this afternoon and evening.

* WAVES/SEAS...9 to 12 feet nearshore. Up to 12 to 16 feet offshore and near the Gulf Stream.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Small Craft Advisory means that wind speeds of 20 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners...especially those operating smaller vessels should avoid navigating in these conditions.

&&

$$


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

Darren Wright
National Weather Service
Marine Weather Program Leader
Phone: 301-427-9283
email: Darren.Wright@noaa.gov


National Weather Service
Analyze, Forecast, and Support Office
Marine, Tropical, and Tsunami Services Branch (W/AFS26)
Last modified: Mar 28, 2019
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