Weather Articles

Major Flooding Likely on the Lower Mississippi and Ohio Rivers; Record River Flooding in Indiana, Lower Michigan

By Chris Dolce
February 24, 2018

More heavy rain is on the way, compounding ongoing river flooding.

Flooding Continues In Midwest, South: Death Toll Rises to 4; Landslides Reported in Pittsburgh Area

By Ada Carr and Sean Breslin
February 24, 2018

The widespread flooding across the South and Midwest has turned deadly. Here's what we know.

Winter Storm Polly Brings Snow and Ice to the Upper Midwest and Northern New England This Weekend

By Jonathan Belles
February 24, 2018

The threat of snow and ice will continue this weekend.

Widespread Severe Weather, Including Some Tornadoes, Threaten the Flood-Weary Mid-South Saturday Night

By Linda Lam
February 24, 2018

First, flooding rain. Now, dangerous severe thunderstorms are a threat.

Here's How That Polar Vortex Split Could Lead to a March East Coast Storm

By Linda Lam
February 23, 2018

A shifting weather pattern may bring big weather changes to start March.

What to Do When Tornado and Flash Flood Warnings Are Issued Simultaneously

By Jonathan Belles
February 23, 2018

Tornado and flash flooding: Should you go to higher ground or in your basement?

Rare Lake-Effect Snow Fell on Oklahoma City This Week

By Sean Breslin
February 23, 2018

Believe it – a lake in Oklahoma City produced snowfall this week.

Winter Storm Polly Leads to Multiple Pileups in Reno Area; Interstate Closed in Arizona

By Sean Breslin
February 23, 2018

Winter Storm Polly caused travel problems as it moved through the West. Here are the latest impacts.

Next Wintry System Will Bring Snow and Ice to the Plains and Midwest Through This Weekend

By Jonathan Belles
February 23, 2018

A new threat of snow and ice is ahead late this week.

Winter Storm Leads to Multiple Pileups in Reno Area; Injuries Reported

By Sean Breslin
February 23, 2018

A winter storm caused travel problems as it moved through the West. Here are the latest impacts.

Winter Storm Oliver Brings Days-Long Icy Siege to Plains; Plane Skids Off Runway at Green Bay Airport

By Ada Carr and Sean Breslin
February 23, 2018

The winter storm has caused widespread travel danger and closures. Here's the latest.

Winter Storm Oliver Will Finish Up With Some Snow, Ice in the Northern Great Lakes, New England Friday

By Jonathan Belles
February 23, 2018

After one round of snow and ice, Oliver has more in store through the end of the week.

Urban Heat Island Effect Likely Responsible for Fog Holes Seen from Space

By Sean Breslin
February 22, 2018

They're visible from space, and they're likely caused by something man-made.

All-Time February Record Highs Smashed in the East: 70s in Maine, 80 in Massachusetts More Typical of June

By Linda Lam
February 22, 2018

For late February, this heat was exceptional.

Deadly Flooding in the Midwest, South Sends Hundreds into Shelters; Emergency Declared in Lansing, Michigan

By Ada Carr and Sean Breslin
February 22, 2018

The widespread flooding across the South and Midwest has turned deadly. Here's what we know.

Winter Storm Oliver's Next Wave of Snow, Ice to Spread Into the Plains, Midwest, Northeast Through Friday

By Jonathan Belles
February 21, 2018

After one round of snow and ice, Oliver has more in store through the end of the week.

21-Degree Drop in 4 Minutes: The Biggest Temperature Swings from Winter Storm Oliver

By Jonathan Belles
February 21, 2018

Some cities in the Plains went from nearly 70 to snow or freezing rain this week as Winter Storm Oliver's cold front passed through.

The Arctic Still Isn't Cooling Off, and Recent Temperature Readings Are Mind-Blowing

By Sean Breslin
February 21, 2018

The shockingly warm readings just keep coming, and this week has been no exception.

Flooding Leads to Water Rescues from Texas to Michigan; 1 Dead in Illinois

By Ada Carr
February 21, 2018

Roads have been shut down and cars have become stranded in high water. Here's the latest.

Without Warning, North Texas Hit by 3 Damaging EF0 Tornadoes; 3 Injured in Johnson County

By Sean Breslin
February 21, 2018

Three small tornadoes caused big problems in North Texas early Tuesday morning.

Featured Blogs

Meteorology of Saturday's Colombian Flood Disaster That Killed 254

By Dr. Jeff Masters
Aprill 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
Märts 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
Oktoober 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
Mai 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.