Special Marine Warning
N
Issued by NWS Tiyan GU
⏳ In force until Mon 19 Oct, 04:15 📍 Guam Coastal Waters; Rota Coastal Waters (approximate) 🕑 3 h ago
SMWGUM THE NATIONAL WEATHER SERVICE IN TIYAN GUAM HAS ISSUED A * SPECIAL MARINE WARNING FOR... ROTA COASTAL WATERS... * UNTIL 1115 AM CHST. * AT 1040 AM CHST...SEVERE THUNDERSTORMS CAPABLE OF PRODUCING WATERSPOUTS WERE LOCATED OVER SOUTHERN ROTA WATERS...MOVING NORTH AT 35 KNOTS. HAZARD...WIND GUSTS TO NEARLY 50 KNOTS. FREQUENT LIGHTNING. WATERSPOUTS POSSIBLE. SOURCE...RADAR. IMPACT...WATERSPOUTS…
🗃 Archived report - it is no longer on the live map. Pages are kept for 30 days.
📡 CAP alert details
Common Alerting Protocol
Official alert linked
▾
📡 CAP alert details
Common Alerting Protocol
⚠
SeveritySevere
⏱
UrgencyImmediate
❓
CertaintyLikely
EventSpecial Marine Warning
Response typeAvoid
CategoryMet
Affected areaGuam Coastal Waters; Rota Coastal Waters
Issuing authorityNWS Tiyan GU
ContactNot supplied
🕓 Alert timing · EAT
Sent2026-10-19T10:41:00+10:00
Effective2026-10-19T10:40:00+10:00
Onset2026-10-19T10:41:00+10:00
Expires2026-10-19T11:15:00+10:00
📋 Official instructions
MOVE TO SAFE HARBOR IMMEDIATELY AS GUSTY WINDS AND HIGH WAVES ARE EXPECTED. FREQUENT LIGHTNING IS OCCURRING WITH THESE STORMS. IF CAUGHT ON THE OPEN WATER STAY BELOW DECK IF POSSIBLE...KEEP AWAY FROM UNGROUNDED METAL OBJECTS.📄 Message details
Alert identifierurn:oid:2.49.0.1.840.0.91ca6ce4ef7aed8382fa782927c81a09fcf7a915.001.1
Message typeAlert
Senderw-nws.webmaster@noaa.gov
ScopePublic
CAP statusActual
Related messagesNot supplied
ⓘ CAP fields populate when an official alert is linked.
🛡 Safety advice
General guidance for this type of incident - not official instructions.
- MOVE TO SAFE HARBOR IMMEDIATELY AS GUSTY WINDS AND HIGH WAVES ARE EXPECTED. FREQUENT LIGHTNING IS OCCURRING WITH THESE STORMS. IF CAUGHT ON THE OPEN WATER STAY BELOW DECK IF POSSIBLE...KEEP AWAY FROM UNGROUNDED METAL OBJECTS.
- Stay aware of your surroundings in this area.
- Follow official updates from the police and local authorities.
- In an emergency call 112 (police) or 112 (ambulance), or request help through Jilinde.
📰 Story summary
From the report shown in the feed:
- SMWGUM THE NATIONAL WEATHER SERVICE IN TIYAN GUAM HAS ISSUED A * SPECIAL MARINE WARNING FOR...
- ROTA COASTAL WATERS...
- * UNTIL 1115 AM CHST.
- * AT 1040 AM CHST...SEVERE THUNDERSTORMS CAPABLE OF PRODUCING WATERSPOUTS WERE LOCATED OVER SOUTHERN ROTA WATERS...MOVING NORTH AT 35 KNOTS.
- HAZARD...WIND GUSTS TO NEARLY 50 KNOTS.
- FREQUENT LIGHTNING.
- WATERSPOUTS POSSIBLE.
- SOURCE...RADAR.
- IMPACT...WATERSPOUTS…
ⓘ News summary · read the original report for full context.
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