Updated Flagship WU App for All iOS Platforms, including Apple Watch

By: Bob Henson and Jeff Masters, 2:47 PM GMT on April 24, 2015

The latest version of Weather Underground’s flagship app is now available for iPad, iPhone, and iPod touch, as well as Apple Watch, which debuts on Friday. The app is free to download from the App Store, including the dedicated App Store for Apple Watch.

Small is beautiful
WU developers have compressed many of the features familiar to WU fans into an elegantly compact format for Apple Watch, which measures about 1.6” by 1.4” wide. This format i...

Updated: 5:39 PM GMT on April 24, 2015

Earth Day Updrafts: Supercell in Texas, Volcano in Chile

By: Bob Henson, 4:43 PM GMT on April 23, 2015

A spectacular supercell thunderstorm over the Texas Panhandle on Wednesday afternoon morphed into a sprawling complex that moved across North Texas overnight with strong winds, heavy rain, and hail. The original supercell dropped several brief tornadoes south and east of Amarillo and displayed some impressive structure (see Figure 1) before it merged with other storms to form a mesoscale convective system (MCS). These large clusters of showers and thunderstorms can ...

Volcano Severe Weather

Updated: 5:29 PM GMT on April 23, 2015

A positive spin on Earth Day from WU

By: Jeff Masters and Bob Henson, 1:57 PM GMT on April 22, 2015

The challenges facing our global environment are serious indeed, but there are many smart people working on solutions, and there’s much to be optimistic about. At Weather Underground, we’re highlighting a wide range of these good-news stories in a special WU microsite created in honor of Earth Day. The theme is progress: through a collection of articles by researchers, field experts, and scientists, the microsite outlines the current state of our cli...

Climate Change

Updated: 6:08 PM GMT on April 22, 2015

The Story Behind That Quadruple Rainbow

By: Bob Henson, 8:40 PM GMT on April 21, 2015

Social media lit up on Tuesday as a stunning photo of what appears to be a quadruple rainbow made the rounds. Amanda Curtis took the shot while waiting on a train at Glen Cove, NY, this morning. After she posted it to Twitter, the image quickly went viral. Curtis was interviewed over the phone by Jim Cantore and Sam Champion on The Weather Channel’s “AMHQ” program. As Curtis explained: “I was waiting for my commuter train into New York City and I was outside...


Updated: 9:59 PM GMT on April 21, 2015

Carbon Dioxide Hits a New Peak this Spring: 404 ppm

By: Bob Henson, 2:08 PM GMT on April 21, 2015

Weekly carbon dioxide measurements from the pristine air atop Hawaii’s Mauna Loa have just topped another predictable yet worrisome milestone: 404 parts per million. The actual preliminary value reported by NOAA for last week (April 12–18) was 404.02 ppm. By all evidence, we now have the largest amount of CO2 present in Earth’s atmosphere for at least the last 800,000 years, and probably several million. The most prevalent of the human-produced greenhouse gase...

Climate Change

Updated: 3:06 PM GMT on April 21, 2015

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Jeff co-founded the Weather Underground in 1995 while working on his Ph.D. He flew with the NOAA Hurricane Hunters from 1986-1990.

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