While tropical downpours are soaking Japan and South Korea this weekend, Halong is the next tropical danger to Japan and has become a super typhoon.
Halong has been rapidly intensifying to start the weekend, becoming a super typhoon early Saturday night local time with maximum sustained winds of 250 kph (155 mph).
Further strengthening is possible before the weekend is over.
Halong will not impact land through at least Tuesday, remaining over the open waters of the western Pacific and creating life-threatening dangerous seas for shipping interests.
While the current path of Halong puts the northern Ryukyu Islands and southern Japan at greatest risk of a direct landfall with heavy rain and damaging winds later in the week, all residents of Japan, the Korean Peninsula and northeastern China should closely monitor the typhoon for potential dangers and any adjustments to the forecast track.
The immediate concern Japan and South Korea is Tropical Storm Nakri spinning in the South China Sea.
Tropical Storm Nakri will continue to spread tropical downpours from the Ryukyu Islands up to Japan's islands of Kyushu, Shikoku and western Honshu and to South Korea through the rest of this weekend.
Flooding and mudslides are a serious concern, especially across southwestern Japan and southern South Korea where several days of downpours will push rain totals through Sunday past 150 mm (6 inches).
Some areas may get the additional rain on Monday, prolonging the flood and mudslide danger.
Any flooding problems in Seoul, where rainfall totals should be on the order of 50 to 100 mm (2 to 4 inches), would likely be localized. Tokyo, meanwhile, will escape the low's downpours.
The potential for locally dangerous and disruptive thunderstorms will exist over the Midwest during Tuesday and Wednesday.
Areas from Central America to southeastern Mexico, western Cuba and southern Florida will be on alert into next week as a tropical system may form.
Warmth will build and evolve into a heat wave across a significant part of the western United States this week.
Rounds of heavy thunderstorms will raise the risk of flooding across the south-central United States into Friday.
Temperatures and humidity levels will throttle back as dry air expands southward in the northeastern United States through the middle of the week.
The next round of primary elections will take place on June 7 with six states heading to the polls.
Ohio, Pennsylvania Ontario (1985)
Great tornado outbreak, reported to be the worst in Pennsylvania history. Path of destruction included 1,200 homes in Ohio alone. Eighty-nine people were killed and 550 injured. Considered by many to be the worst outbreak in the U.S. since April 3, 1974. The outbreak of tornadoes spun 21 well-defined tracks, one as long as 56 miles. Most of the tornadoes in PA, OH and southern NY were spawned from 9 different storm centers that began in the lower Great Lakes. The most violent tornado ran from Ravenna Arsenal, OH, southeast of Youngstown,OH, a distance of 41 miles to Mercer, PA. An airplane wing was carried 10 miles by the tornado.
Washington, DC (1991)
An average temperature of 73 degrees, making May 1991 the warmest May on record. There were a record 11 days of 90-degree heat.
Walla Walla, WA (1991)
6.63" of rain -- the wettest month in 105 years of record keeping.