Special Marine Warning
NWS Tiyan GU ยท US
New
Details
Special Marine Warning Issued September 19 At 9:11PM ChST Until September 19 At 9:45PM ChST By NWS Tiyan GU
- Event
- Special Marine Warning
- Issued
- Effective
- Onset
- Message expires
- Expected end
- Category
- Meteorological
- Urgency
- Immediate
- Severity
- Severe
- Certainty
- Likely
- Response
- Avoid
Description
Overview
SMWGUM THE NATIONAL WEATHER SERVICE IN TIYAN GUAM HAS ISSUED A * SPECIAL MARINE WARNING FOR... GUAM COASTAL WATERS... * UNTIL 945 PM CHST. * AT 911 PM CHST...STRONG THUNDERSTORMS WERE LOCATED OVER THE WEST COAST OF GUAM...MOVING EAST AT 10 KNOTS.
Hazard
WIND GUSTS 34 KNOTS OR GREATER. FREQUENT LIGHTNING
Source
RADAR.
Impacts
SMALL CRAFT COULD BE DAMAGED IN BRIEFLY HIGHER WINDS AND SUDDENLY HIGHER WAVES. * STRONG THUNDERSTORMS WILL REMAIN OVER MAINLY OPEN WATERS.
Instructions
FREQUENT LIGHTNING IS OCCURRING WITH THESE STORMS. IF CAUGHT ON THE OPEN WATER STAY BELOW DECK IF POSSIBLE...KEEP AWAY FROM UNGROUNDED METAL OBJECTS.
Affected areas
- Guam Coastal Waters
Public contact
- Issuer
- NWS Tiyan GU
- Website
- http://www.weather.gov
Message record
- Received
- Issue to receipt
- ~59s
- CAP status
- Actual
- CAP message type
- Alert
- Lifecycle
- New
- Source
- NWWS-OI
- Feed
- NWWS
- Recovered
- No
CAP routing and identity
- ULID
- 01M2WNX5X9S04WV15JXGR6VYQ4
- Identifier
- urn:oid:2.49.0.1.840.0.96e6f65438c9ae226e0a8347389d15d55c5e5adf.001.1
- Sender
- w-nws.webmaster@noaa.gov
- Scope
- Public
- CAP source
- 211803 v2.3.0
- Handling codes
- IPAWSv1.0
- Issuing office
- NWS Tiyan GU
- AWIPS ID
- CAPGUM
- NWWS sequence
- nwws_processor.8785
- WMO heading
- XOMY50
- WMO data type
- CAP alert message XML (XO)
- WMO bulletin number
- 50
Event codes
| Name | Value |
|---|---|
| SAME | SMW |
| NationalWeatherService | MAW |
Parameters
| Name | Value |
|---|---|
| AWIPSidentifier | SMWGUM |
| WMOidentifier | WHMY50 PGUM 191112 |
| eventMotionDescription | 2026-09-19T11:11:00-00:00...storm...284DEG...10KT...13.52,144.72 13.42,144.52 13.26,144.44 |
| BLOCKCHANNEL | EAS |
| BLOCKCHANNEL | NWEM |
| EAS-ORG | WXR |
| VTEC | /O.NEW.PGUM.MA.W.0025.260919T1112Z-260919T1145Z/ |
| eventEndingTime | 2026-09-19T21:45:00+10:00 |
| BLOCKCHANNEL | CMAS |
Locations
Location data
- Guam Coastal Waters
| Name | Value |
|---|---|
| SAME | 065151 |
| UGC | PMZ151 |
- Polygons
- 13.43,144.46 13.51,144.7 13.45,144.68 13.41,144.64 13.28,144.66 13.22,144.69 13.23,144.36 13.43,144.46