The Marine Weather Message (MWW) 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 tropical cyclone watches/warnings. 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. That type of information is included in Special Marine Warnings, which is not a part of the MWW.
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
Marine Warnings
Marine Advisories
Official NWSI 10-315, Marine Weather Message 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 | WHO 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 | WHO 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 |
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. && $$
Darren Wright
National Weather Service
Marine Weather Program Leader
Phone: 301-427-9283
email: Darren.Wright@noaa.gov
