Weather Articles

More Than 60 Homes Destroyed by California's Detwiler Fire; Residents Allowed to Return Home

By Sean Breslin and Pam Wright
July 24, 2017

Here's what we know about a large wildfire burning miles from Yosemite National Park.

9 Die, Dozens Sickened in Sweltering San Antonio Tractor-Trailer

By Pam Wright
July 24, 2017

Here's what we know about the tragedy unfolding in San Antonio.

Damage Reported After Possible Tornado Strikes Queen Anne's County, Maryland; 11-Year-Old Missing near South Carolina Coast

By Sean Breslin
July 24, 2017

Severe storms have caused problems in a number of states in the South and mid-Atlantic.

Madden-Julian Oscillation: A Factor in Hurricane Season Forecasting You May Not Have Heard of Before

By Brian Donegan
July 24, 2017

The Madden-Julian Oscillation may not be well known, but it's an important factor during the hurricane season.

More Severe Weather For Storm-Weary Midwest, But a Change Looms in July's Final Week

By Chris Dolce
July 24, 2017

Less humid air will not only move into the Midwest but also parts of the South and East by later this week.

Typhoon Noru, the Western Pacific's First of 2017, Begins Weird Fujiwhara Effect With Tropical Storm Kulap

By Jon Erdman
July 24, 2017

The world's most active tropical cyclone zone is showcasing a weird interaction this week.

Snooty, the World's Oldest Manatee in Captivity, Has Died Following 'Heartbreaking Accident'

By Pam Wright
July 23, 2017

The oldest manatee in captivity died Sunday, just two days after he turned 69.

Eight Tropical Cyclones At Once in the North Pacific Ocean For First Time Since 1974

By Jon Erdman
July 23, 2017

Why are so many tropical cyclones occurring at once in the Pacific Ocean?

Quad City Officials Prepare for Possible River Flooding

By Pam Wright
July 23, 2017

Communities along the Mississippi River prepare for flooding.

Severe Storms Threaten Midwest and East on Sunday

By Brian Donegan
July 22, 2017

Damaging winds, large hail and flash flooding are all potential concerns.

'Ring of Fire' Weather Pattern Brings Dangerous Heat, Severe Storms and Heavy Rain

By Chris Dolce
July 22, 2017

Storms and torrid heat are in the forecast from a ring of fire weather pattern.

Missouri Inmates Scream for Help Amid Heat Wave In Prison That Lacked Air Conditioning

By Eric Chaney
July 21, 2017

A video showing prisoners yelling from the windows of a St. Louis city jail is raising questions about the building's lack of air conditioning.

Turkey, Greece Earthquake Kills 2, Injures Hundreds

By Ada Carr
July 21, 2017

Parts of Turkey and Greece felt the strong, deadly earthquake.

Why Was Mark Zuckerberg's Meeting With Glacier Climate Expert Canceled?

By Eric Chaney
July 20, 2017

Mark Zuckerberg toured Glacier National Park, but a scheduled tour of Logan Pass with a top climate expert was canceled just three days before the visit.

Hundreds Evacuated from Western Wisconsin Town Due to Flooding; EF1 Tornado Confirmed in McGregor, Iowa

By Sean Breslin
July 20, 2017

Flood water rose quickly Thursday morning in the western Wisconsin town of Arcadia.

Exceptional Drought Returns to Montana and North Dakota for First Time in More Than a Decade

By Chris Dolce
July 20, 2017

The worst drought in the United States continues to intensify.

California's Detwiler Fire, Now Larger Than Seattle, Destroys Dozens of Structures

By Sean Breslin
July 20, 2017

Here's what we know about a large wildfire burning miles from Yosemite National Park.

Yes, There Was a Derecho Wednesday in the Midwest; Here's What That Means

By Jon Erdman
July 20, 2017

It's common in the summer months. We explain what hit the Midwest on Wednesday.

Where Did the ‘Dog Days’ of Summer Come From?

By Brian Donegan
July 20, 2017

You may be surprised how far this saying dates back.

Flying Ants and 16 Other Weird Things That Have Shown Up on Radar

By Chris Dolce
July 20, 2017

Radar is useful for more than just seeing rain and snow.

Featured Blogs

Meteorology of Saturday's Colombian Flood Disaster That Killed 254

By Dr. Jeff Masters
April 3, 2017

At least 254 people were killed in the in the city of Mocoa (population 40,000) in southwest Colombia near the border of Ecuador early Saturday, when torrential rains triggered a debris flow on a nearby mountain that surged into the town as a huge wall of water carrying tons of mud and debris. The disaster is the fourth deadliest weather-related disaster in Colombia’s recorded history.

Iconic American Destination Virtually Isolated for Rest of Year

By Christopher C. Burt
March 24, 2017

Half of the village of Big Sur, on the coast of central California, has lost its only access to the north following the demolition of the flood-damaged Pfeiffer Canyon Bridge along State Route 1 (also Rt. 1 or SR 1) on March 19. Although Rt. 1 to the south of Big Sur has reopened to traffic (after mud and rock slides were cleared) it is a long 70-mile journey along the windy but spectacular highway to Cambria, the next town of any significance where supplies can be had. CalTrans (California Department of Transportation) estimates it will take 6-9 months to rebuild a new bridge over the canyon.

An extraordinary meteorological event; was one of its results a 1000-year flood?

By Stu Ostro
October 5, 2015

The confluence of meteorological ingredients the first weekend in October 2015 resulted in an extraordinary weather event with severe impacts. Was one of them a 1000-year flood?

Why the Arrest of a Science-Loving 14-year-old Matters

By Shaun Tanner
September 16, 2015

By now, many of you have heard or read about the arrest of Ahmed Mohamed, a 14-year-old high school student from Irving, Texas. Ahmed was arrested because school officials called the police after he showed one of his teachers his homemade clock. Mistaken for a bomb, Ahmed was taken into custody, interrogated, shamed, suspended (still on suspension today, Wednesday), and reprimanded. All of this after it has been found that the "device" he brought to school was indeed, a homemade clock.

2013-14 - An Interesting Winter From A to Z

By Tom Niziol
May 15, 2014

It was a very interesting winter across a good part of the nation from the Rockies through the Plains to the Northeast. Let's break down the most significant winter storms on a month by month basis.

What the 5th IPCC Assessment Doesn't Include

By
September 27, 2013

Melting permafrost has the potential to release an additional 1.5 trillion tons of carbon into the atmosphere, and could increase our global average temperature by 1.5°F in addition to our day-to-day human emissions. However, this effect is not included in the IPCC report issued Friday morning, which means the estimates of how Earth's climate will change are likely on the conservative side.

Recent Infographics

Storm Surge

Storm Surge terms described and defined in the Storm Surge infographic by Weather Underground.

El Niño

To understand the science behind El Niño, and the associated precipitation, checkout this infographic by Weather Underground.

Why the Sky is Blue

Finally, childhood questions answered. Find out why the sky is blue in our latest graphic.