Strengthening Monsoon Flow Expected for the Marianas

by Jenna R. Gaminde, Guam Homeland Security / Office of Civil Defense
Stripes Guam

The National Weather Service (NWS), Forecast Office, Tiyan, Guam, has issued a special weather statement for Guam, Rota, Tinian, and Saipan. A strengthening monsoon flow is expected for the Marianas this weekend into next week.
NWS advises a broad area of low pressure centered about 400 miles west of Saipan is showing signs of development, producing scattered showers and thunderstorms from south of the Mariana Islands northwestward to well north of Palau.
This system is expected to gradually develop and drift toward the northeast over the next several days resulting in strong monsoonal winds, heavy showers and thunderstorms over the Marianas this weekend and the first half of next week. Winds of 15 to 25 mph with higher gusts in showers are expected by Saturday evening. Seas will build further and could reach small craft advisory levels by Friday or Saturday.

The Offices of Guam Homeland Security and Civil Defense (OHS/OCD) remind that all care and caution must be exercised if planning any outdoor or marine activities over the next several days. Hazardous seas and inclement weather are expected. Listen out for any additional NWS advisories throughout the week.

The following are basic flood safety tips to keep in mind, found at

• Now is a good time to clear drainage areas and un-block clogged storm drains in your area to minimize the chance of flooding.
• Avoid walking or driving through flood waters.
• Just 6 inches of moving water can knock you down, and 2 feet of water can sweep your vehicle away.
• If there is a chance of flash flooding, move immediately to higher ground.
• If floodwaters rise around your car but the water is not moving, abandon the car and move to higher ground. Do not leave the car and enter moving water.
• Avoid camping or parking along streams, rivers, and creeks during heavy rainfall. These areas can flood quickly and with little warning.
OHS/OCD in conjunction with NWS will continue to monitor all systems in our area closely. Visit the following links for the latest advisory information:

• NWS Website:
• NWS Facebook:
• OHS/OCD Facebook:
For more information, contact OHS/OCD Public Affairs Officer, Jenna Gaminde at (671) 478-0208 or via email at

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