Special Marine Warning
NWS New Orleans LA ยท US
Details
Special Marine Warning Issued September 21 At 10:54PM CDT Until September 21 At 11:30PM 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 1130 PM CDT. * At 1053 PM CDT, a severe thunderstorm capable of producing waterspouts was located 7 nm west of The Mid Point Of The Causeway Bridge, moving southwest at 15 knots.
Hazard
Waterspouts and wind gusts 34 knots or greater.
Source
Radar.
Impacts
Waterspouts can quickly form and capsize boats...damage vessels and oil rigs...and create suddenly higher waves. Small craft could be damaged in briefly higher winds and suddenly higher waves.
Locations impacted
Kenner.
Instructions
Strong winds will be dangerous for boaters or anyone near the water. Boaters should avoid waterspouts and never try to navigate near them. Make sure all on board are wearing life jackets. Seek shelter or move to safe harbor until hazardous weather passes.
Affected areas
- Lake Pontchartrain
Public contact
- Issuer
- NWS New Orleans LA
- Website
- http://www.weather.gov
Message record
- Received
- Issue to receipt
- ~20s
- CAP status
- Actual
- CAP message type
- Alert
- Lifecycle
- New
- Source
- NWWS-OI
- Feed
- NWWS
- Recovered
- No
CAP routing and identity
- ULID
- 01M33M049NR7G7P9AF753ZZ20C
- Identifier
- urn:oid:2.49.0.1.840.0.8a9a0be9da96d317eeee87b6a571064190188711.001.1
- 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.5464
- 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 220354 |
| eventMotionDescription | 2026-09-22T03:53:00-00:00...storm...034DEG...17KT...30.18,-90.25 |
| waterspoutDetection | POSSIBLE |
| BLOCKCHANNEL | EAS |
| BLOCKCHANNEL | NWEM |
| EAS-ORG | WXR |
| VTEC | /O.NEW.KLIX.MA.W.0343.260922T0354Z-260922T0430Z/ |
| eventEndingTime | 2026-09-21T23:30:00-05:00 |
| BLOCKCHANNEL | CMAS |
Locations
Location data
- Lake Pontchartrain
| Name | Value |
|---|---|
| SAME | 077531 |
| UGC | GMZ531 |
- Polygons
- 30.29,-90.28 30.19,-90.11 30.0,-90.21 30.02,-90.35 30.05,-90.41 30.1,-90.46 30.29,-90.28