Special Marine Warning
NWS New Orleans LA ยท US
New
Details
Special Marine Warning Issued September 21 At 6:23PM CDT Until September 21 At 7:00PM CDT By NWS New Orleans LA
- Event
- Special Marine Warning
- Issued
- Onset
- Message expires
- Expected end
- Category
- Meteorological
- Urgency
- Immediate
- Severity
- Severe
- Certainty
- Likely
- Response
- Avoid
Description
Overview
SMWLIX The National Weather Service in New Orleans has issued a * Special Marine Warning for... Lake Pontchartrain... * Until 700 PM CDT. * At 623 PM CDT, a strong thunderstorm was located near Madisonville, or 6 NM west of Mandeville, moving southwest at 30 knots.
Hazard
Wind gusts to 40 knots.
Source
Radar indicated.
Impacts
Small craft could be damaged in briefly higher winds and suddenly higher waves.
Locations impacted
The Mid Point Of The Causeway Bridge, Kenner, Madisonville and Mandeville.
Instructions
Move to safe harbor until hazardous weather passes. Move to safe harbor immediately as gusty winds and high waves are expected.
Affected areas
- Lake Pontchartrain
Public contact
- Issuer
- NWS New Orleans LA
- Website
- http://www.weather.gov
Message record
- Received
- Issue to receipt
- ~49s
- CAP status
- Actual
- CAP message type
- Alert
- Lifecycle
- New
- Source
- NWWS-OI
- Feed
- NWWS
- Recovered
- No
CAP routing and identity
- ULID
- 01M334GT5YBVXMXX6Y5J1G2F5S
- Identifier
- urn:oid:2.49.0.1.840.0.367967296bb731fe35561c2af11048f651cd8a3d.001.1
- Sender
- w-nws.webmaster@noaa.gov
- Scope
- Public
- CAP source
- 211803 v2.3.0
- Handling codes
- IPAWSv1.0
- Issuing office
- NWS New Orleans LA
- AWIPS ID
- CAPLIX
- NWWS sequence
- nwws_processor.9422
- WMO heading
- XOUS54
- WMO data type
- CAP alert message XML (XO)
- WMO geography
- United States (US)
- WMO bulletin number
- 54
Event codes
| Name | Value |
|---|---|
| SAME | SMW |
| NationalWeatherService | MAW |
Parameters
| Name | Value |
|---|---|
| AWIPSidentifier | SMWLIX |
| WMOidentifier | WHUS54 KLIX 212323 |
| maxWindGust | 40 knots |
| maxHailSize | 0.00 |
| BLOCKCHANNEL | EAS |
| BLOCKCHANNEL | NWEM |
| EAS-ORG | WXR |
| VTEC | /O.NEW.KLIX.MA.W.0338.260921T2323Z-260922T0000Z/ |
| eventEndingTime | 2026-09-21T19:00:00-05:00 |
| BLOCKCHANNEL | CMAS |
Locations
Location data
- Lake Pontchartrain
| Name | Value |
|---|---|
| SAME | 077531 |
| UGC | GMZ531 |
- Polygons
- 30.02,-90.16 30.01,-90.16 30.04,-90.39 30.1,-90.44 30.11,-90.45 30.14,-90.45 30.22,-90.42 30.38,-90.26 30.4,-90.22 30.37,-90.05 30.02,-90.16