WHGM70 PGUM 170112
MWWGUM

URGENT - MARINE WEATHER MESSAGE
National Weather Service Tiyan GU
1112 AM ChST Sat Oct 17 2026

PMZ151-152-172000-
/O.CON.PGUM.TY.W.4029.000000T0000Z-000000T0000Z/
Guam Coastal Waters-Rota Coastal Waters-
1112 AM ChST Sat Oct 17 2026

...TYPHOON WARNING REMAINS IN EFFECT...

* WHAT....Typhoon conditions, including winds of 64 knots or more
  are expected.

* WHERE...Guam and Rota Coastal Waters.

* WHEN...Onset of damaging winds beginning Saturday night. Onset of 
  destructive winds Sunday morning. Damaging winds will continue into
  at least Sunday night, possibly longer if conditions warrant.

* IMPACTS...Destructive winds will produce dangerous seas that
  could damage, capsize or sink vessels, along with drastically
  reducing visibilities in heavy rain.

* ADDITIONAL DETAILS...Typhoon Champi (29W) continues to move quickly
  toward the Marianas. The exact path of 29W remains subject to
  change. However, guidance supports a passage through Guam coastal
  waters, with damaging winds moving in late tonight and lasting 
  into at least Sunday night. Champi is expected to strengthen 
  further today as it approaches, then move through the region as a 
  typhoon Sunday morning. Seas will quickly rise, with significant 
  sea heights reaching as high as 35 feet during closest passage of 
  Champi. Dangerous sea conditions may continue into Monday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...Prepare for the passage of a
typhoon Sunday morning. Secure all vessels. Conditions are expected 
to be catastrophic for small craft, and extremely dangerous for any 
vessels of larger size. As Tropical Storm Champi approaches, stay in 
safe harbor.

&&

$$

PMZ153-154-172000-
/O.CON.PGUM.TR.W.4029.000000T0000Z-000000T0000Z/
/O.CON.PGUM.TY.A.4029.000000T0000Z-000000T0000Z/
Tinian Coastal Waters-Saipan Coastal Waters-
1112 AM ChST Sat Oct 17 2026

...TROPICAL STORM WARNING REMAINS IN EFFECT...
...TYPHOON WATCH REMAINS IN EFFECT...

* WHAT...Tropical storm conditions, including winds of 34 to 63 
  knots, are expected. Typhoon conditions, including winds of 64 
  knots or more are possible within the next 48 hours.

* WHERE...Tinian and Saipan Coastal Waters.

* WHEN...Onset of damaging winds beginning late tonight, continuing 
  into at least Sunday night, possibly longer if conditions warrant.

* IMPACTS...Destructive winds will produce dangerous seas that
  could damage, capsize or sink vessels, along with drastically
  reducing visibilities in heavy rain.

* ADDITIONAL DETAILS...Typhoon Champi (29W) continues to move quickly
  toward the Marianas. The exact path of 29W remains subject to
  change. However, guidance supports a passage through Guam coastal
  waters, with damaging winds moving into Tinian and Saipan tonight
  and lasting into at least Sunday night. Champi is expected to
  strengthen further today as it approaches, then move through the 
  region as a typhoon Sunday morning. Seas will quickly rise, with 
  significant sea heights reaching as high as 25 feet during closest 
  passage of Champi. Dangerous sea conditions may continue into 
  Monday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...Prepare for tropical storm
force conditions Sunday morning. Secure all vessels. Conditions 
are expected to be catastrophic for small craft, and extremely 
dangerous for any vessels of larger size. As Tropical Storm Champi
approaches the Marianas, stay in safe harbor.

&&

$$

Montvila