Thousands Urged to Evacuate Iowa Floods; Megi’s Threat to Taiwan Escalates

By: Bob Henson and Jeff Masters, 10:12 PM GMT on September 26, 2016

Water from the Cedar River will overspread a large swath of Cedar Rapids, Iowa’s second-largest city, on Tuesday. Fed by massive rains over northeast Iowa during the past week, the flood crest of 23 feet projected on Monday afternoon for Tuesday afternoon would be the second-worst in city history--topped only by the 31 feet during the catastrophic flood of June 2008, and 3 feet higher than all other crests. Officials have strongly encouraged residents of about 500...

Hurricane Flood

97L Growing More Organized as it Approaches the Lesser Antilles Islands

By: Jeff Masters, 3:11 PM GMT on September 26, 2016

A tropical wave located about 1000 miles east-southeast of Barbados in the Lesser Antilles Islands late Monday morning (Invest 97L) was headed west at 15 - 20 mph, and has the potential to become a dangerous storm in the Caribbean later this week. Satellite loops on Monday morning showed 97L was growing considerably more organized, with more curvature to the cloud pattern, an increasing amount of heavy thunderstorm activity, low-level spiral bands that were getting...

Hurricane

Updated: 3:27 PM GMT on September 26, 2016

97L Potentially a Dangerous Storm for the Caribbean

By: Jeff Masters, 5:38 PM GMT on September 25, 2016

A tropical wave located midway between the Lesser Antilles Islands and the coast of Africa on Sunday afternoon was headed west at 15 - 20 mph, and has the potential to become a dangerous storm in the Caribbean later this week. NHC designated this system Invest 97L on Sunday morning. After looking remarkably unimpressive on satellite loops for the previous few days, 97L was turning that situation around on Sunday. The system had a large circulation at middle levels ...

Hurricane

Updated: 7:52 PM GMT on September 25, 2016

Potential Trouble in Tropical Atlantic; Karl Brushes Bermuda; Megi Eyes Taiwan

By: Jeff Masters and Bob Henson, 5:23 PM GMT on September 24, 2016

A tropical wave located a few hundred miles south-southwest of the Cabo Verde Islands on Saturday morning was poorly organized, with only a limited amount of heavy thunderstorm activity and spin. This wave was under low to moderate wind shear of 5 - 15 knots and was over warm ocean waters near 29°C (84°F), but was too close to the equator (near 9°N) to be able to leverage the Earth’s spin and acquire enough spin of its own to develop into a tropical depression...

Hurricane

Updated: 5:45 PM GMT on September 24, 2016

Karl Approaches Bermuda; Trouble in the Caribbean Next Week?

By: Bob Henson and Jeff Masters, 4:14 PM GMT on September 23, 2016

After nearly a week as a lackluster system, Tropical Storm Karl is finally gaining strength as it heads toward a close encounter with Bermuda. As of the 11 am EDT advisory, Karl was located about 250 miles south of Bermuda, moving north at 12 mph. Karl’s top sustained winds were holding at 60 mph, its peak intensity thus far. Karl is continuing its multi-day struggle with vertical wind shear that’s tended to push its showers and thunderstorms (convection) east o...

Hurricane

Updated: 4:28 PM GMT on September 23, 2016

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Dr. Jeff Masters' WunderBlog

About

Dr. Masters co-founded wunderground in 1995. He flew with the NOAA Hurricane Hunters 1986-1990. Co-blogging with him: Bob Henson, @bhensonweather

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Pictured Rocks Beach Day
Pictured Rocks dunes and clouds
Grizzlies in Lake Clark National Park
Mount Redoubt Lava Dome