Special Marine Warning
NWS Tiyan GU ยท US
New
Details
Special Marine Warning Issued September 26 At 3:30PM ChST Until September 26 At 4:00PM 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 400 PM CHST. * AT 330 PM CHST...A SHOWER CAPABLE OF PRODUCING WATERSPOUTS WAS LOCATED JUST OFF THE COAST OF EASTERN GUAM NEAR PAGO BAY OF MOVING SOUTHEAST AT 5 KNOTS.
Hazard
WATERSPOUTS AND WIND GUSTS 34 KNOTS OR GREATER.
Source
MARINE WEATHER SPOTTER.
Impacts
WATERSPOUTS CAN CREATE LOCALLY HAZARDOUS SEAS. SMALL CRAFT COULD BE DAMAGED IN BRIEFLY HIGHER WINDS AND SUDDENLY HIGHER WAVES. * THE SHOWER WILL REMAIN OVER MAINLY OPEN WATERS.
Instructions
WATERSPOUTS CAN EASILY OVERTURN BOATS AND CREATE LOCALLY HAZARDOUS SEAS. SEEK SAFE HARBOR IMMEDIATELY.
Affected areas
- Guam Coastal Waters
Public contact
- Issuer
- NWS Tiyan GU
- Website
- http://www.weather.gov
Message record
- Received
- Issue to receipt
- ~19s
- CAP status
- Actual
- CAP message type
- Alert
- Lifecycle
- New
- Source
- NWWS-OI
- Feed
- NWWS
- Recovered
- No
CAP routing and identity
- ULID
- 01M3E34KBBDMQH1E4S2F8NV4HW
- Identifier
- urn:oid:2.49.0.1.840.0.bff5375e5fbd7b5a9440086376ebe6cb74ce7326.001.1
- 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.7724
- 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 260531 |
| eventMotionDescription | 2026-09-26T05:30:00-00:00...storm...294DEG...6KT...13.41,144.78 |
| waterspoutDetection | POSSIBLE |
| BLOCKCHANNEL | EAS |
| BLOCKCHANNEL | NWEM |
| EAS-ORG | WXR |
| VTEC | /O.NEW.PGUM.MA.W.0026.260926T0531Z-260926T0600Z/ |
| eventEndingTime | 2026-09-26T16:00:00+10:00 |
| BLOCKCHANNEL | CMAS |
Locations
Location data
- Guam Coastal Waters
| Name | Value |
|---|---|
| SAME | 065151 |
| UGC | PMZ151 |
- Polygons
- 13.39,144.76 13.44,144.79 13.46,144.85 13.36,144.83 13.39,144.76