Special Marine Warning
NWS New Orleans LA ยท US
Details
Special Marine Warning Issued September 21 At 6:58PM CDT Until September 21 At 7:30PM 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 730 PM CDT. * At 658 PM CDT, a severe thunderstorm capable of producing waterspouts was located near The Mid Point Of The Causeway Bridge, moving south at 20 knots. The observation around the Mid Point of the Causeway Bridge gusted to 53 mph.
Hazard
Waterspouts and wind gusts to nearly 50 knots.
Source
Radar indicated.
Impacts
Waterspouts can easily overturn boats and create locally hazardous seas. Small craft could be damaged in briefly higher winds and suddenly higher waves.
Locations impacted
The Mid Point Of The Causeway Bridge, Kenner, Lake Pontchartrain/Lake Maurepas and Orleans Marina.
Instructions
Move to safe harbor until hazardous weather passes. Seek safe shelter, mariners can expect gusty winds and increasing waves.
Affected areas
- Lake Pontchartrain
Public contact
- Issuer
- NWS New Orleans LA
- Website
- http://www.weather.gov
Message record
- Received
- Issue to receipt
- ~28s
- CAP status
- Actual
- CAP message type
- Alert
- Lifecycle
- New
- Source
- NWWS-OI
- Feed
- NWWS
- Recovered
- No
CAP routing and identity
- ULID
- 01M336G7P6B7A3PPR337D35KG4
- Identifier
- urn:oid:2.49.0.1.840.0.62703a0fef2c5cb489656defd927b4d35ae98531.001.1
- 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.10540
- 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 212358 |
| maxWindGust | 50 knots |
| maxHailSize | 0.00 |
| waterspoutDetection | POSSIBLE |
| BLOCKCHANNEL | EAS |
| BLOCKCHANNEL | NWEM |
| EAS-ORG | WXR |
| VTEC | /O.NEW.KLIX.MA.W.0339.260921T2358Z-260922T0030Z/ |
| eventEndingTime | 2026-09-21T19:30:00-05:00 |
| BLOCKCHANNEL | CMAS |
Locations
Location data
- Lake Pontchartrain
| Name | Value |
|---|---|
| SAME | 077531 |
| UGC | GMZ531 |
- Polygons
- 30.05,-89.98 30.03,-89.98 30.01,-90.01 30.01,-90.02 30.0,-90.03 30.0,-90.07 30.03,-90.38 30.04,-90.39 30.1,-90.44 30.1,-90.45 30.18,-90.45 30.32,-90.31 30.27,-90.04 30.05,-89.98