What to Expect from El Niño: North America

By: Bob Henson, 3:16 PM GMT on July 28, 2015

We’re now well into the ramp-up phase of what promises to be one of the top three El Niño events of the last 60-plus years. Sea-surface temperatures (SSTs) in the Niño3.4 region--an area straddling the eastern tropical Pacific--are the most widely accepted index for the oceanic evolution of El Niño. NOAA announced in its weekly ENSO update on Monday (see PDF) that Niño3.4 SSTs were running 1.6°C degrees above the seasonal average for the week ending Monday. W...

El Niño

Updated: 6:38 PM GMT on July 28, 2015

Quiet in the Atlantic; Two Disturbances for Hawaii to Watch

By: Jeff Masters, 3:29 PM GMT on July 27, 2015

The tropics have fallen silent the past two days, with no named storms anywhere on the planet. It's not unusual to see a quiet period for tropical cyclones in July, which lies before the climatological peak months of August, September, and October in the Northern Hemisphere (a tropical cyclone is the generic term for all tropical depressions, tropical storms, and hurricanes/typhoons). The tropical cyclone-free period will likely be short lived, though, as Invest 90...


Record Ocean Temperatures Threaten Hawaii's Coral Reefs

By: Jeff Masters, 7:34 PM GMT on July 24, 2015

Record warm sea surface temperatures in Hawaii's waters threaten to bring a second consecutive year of record coral bleaching to their precious coral reefs this summer. According to NOAA, ocean temperatures in the waters near and to the south of the Hawaiian Islands were 1 - 2°C (1.8 - 3.6°F) above average in June, which was the warmest these waters have been since record keeping began over a century ago. With the waters surrounding Hawaii expected to warm to thei...

Climate Change

Fewer but Stronger Global Tropical Cyclones Due to Ocean Warming

By: Dr. Jeff Masters, 3:36 PM GMT on July 23, 2015

Global ocean temperatures hit their warmest levels in recorded history last month. Since hurricanes are heat engines which extract heat energy from the oceans and convert it to the kinetic energy of the storms' winds, we should be concerned about the potential for hurricanes to be stronger as a result of global warming. Indeed, the observed 0.3°C (0.5°F) warming of Earth's oceans over the past 30 years has made more energy available to hurricanes, says a new study...

Hurricane Climate Change

Weather Underground Takes Over The Weather Channel in New Weeknight Series

By: Jeff Masters, 1:25 PM GMT on July 22, 2015

It's been three years since Weather Underground (WU) became part of The Weather Company (AKA The Weather Channel, TWC). A key goal of mine for the merger--to make both Weather Underground and The Weather Channel better--has shown steady progress over the past few years, and takes an even larger step in that direction beginning on August 24, with the launch of the "Weather Underground" live cable TV show airing weekdays from 6-8 p.m. ET on The Weather Channel. The ne...

Wunderground News

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

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