Archive | June, 2021

Tropical Storm Champi Named south of Japan.

Discussing Tropical Storm Champi today as it tracks north towards Japan. It would become a typhoon near the Ogasawara island before getting wrapped up in the rainy season front off the coast of Honshu. That still could mean a messy weekend in Tokyo Sunday in to Monday. Maybe not a full-on typhoon there but not a pleasant outdoor weekend at the park.

This after the storm passed south of Guam on Monday- Tuesday. No damage was reported on the island and winds were seen only upwards of 40mph.

Champi kind of a black sheep in the Typhoon Community. Check out its location compared to where all other named storms are on June 25th in the western pacific. Venturing way outside of the typical paths. A few reasons for this with one being above-average sea surface temperatures. Could be a sign of things to come later this season.

Developing Tropical System Near Guam

JTWC has upgraded the low-pressure area east of Guam to a Tropical Depression and expects it to become a tropical storm as the system passes just south of the island. Despite the Low-level center remaining offshore, the bulk of the convection will pass over Guam which means tropical storm conditions are possible on the island Tuesday into Wednesday.

For updates I would continue to check in with US National Weather Service Guam for the latest and greatest information. They run a pretty good social media program there.

Western Pacific Tropical Outlook

The monsoon and the rainy season front are in control today. With a few sub-tropical low likely spinning up near Okinawa and South of Honshu through the weekend into early next week. What that simply means is lows developing along the rainy season front which equals more rain. Not a far-fetched concept considering the time of year it is. I also discuss some of the long-range guidance.

Tropical Storm Koguma moving on shore in to Northern Vietnam.

Tropical Storm Koguma has now labeled by JMA the 4th named storm of 2021 in the western pacific. This area is more or less a large mass of thunderstorms in the Gulf of Tonkin moving on shore into Northern Vietnam. The biggest issue is heavy rainfall, flooding, and landslides in N. Vietnam and Laos. Some locations could see over 200mm of total rains in Northern Vietnam and Laos which naturally could lead to some serious flooding and landslides. The storm’s backside is also pulling moisture across the Philippines today, and long-range outlooks indicate a sub-tropical low developing near Okinawa.


1) Hainan, a popular tourist spot in China is not going to have beautiful weather this weekend. Expect heavy showers all weekend into early next week.

2) Northern Vietnam including Hanoi. The warm water over the Gulf of Tonkin often surprises us as they tend to help spin things up quickly So should be watched as well. Northern Vietnam could see some pockets of rainfall over 200mm in total.

3) Laos is also seeing heavy rainfall from Koguma, here flooding and landslides are possible.